Senior Product Engineer at goodstack | London, UK

Join Our Team as a Senior Product EngineerAt Slingshot AI, we are pioneers in creating innovative AI solutions for mental health. Our flagship product, Ash, is designed to make mental health support more accessible, empowering individuals to transform their lives. We are committed to building a diverse and talented team that thrives on autonomy, flexibility, and collaboration.As a Senior Product Engineer, you will be at the forefront of enhancing Ash, working within a dynamic product team that combines product management, design, and engineering expertise, along with specialists in machine learning and AI. Your contributions will encompass the full development stack, from implementing engaging new features to creating automated processes that enhance the efficiency and effectiveness of our product.We are looking for passionate builders who are eager to take ownership of their work and are dedicated to delivering value to our users. You will be joining a small, highly skilled team where your insights and creativity will shape the future of Ash.Our technology stack includes Dart/Flutter for mobile applications, Kotlin for backend services, Python for machine learning, and Next.js/TypeScript for internal tools, with Rust used for low-level media streaming. While expertise in all these technologies is not mandatory, a willingness to learn and adapt is essential.

Join Slingshot AI as an Engineering ManagerAt Slingshot AI, we are pioneering mental health solutions with our innovative AI, Ash. Our goal is to enhance accessibility to mental health support, empowering individuals to transform their lives.We are cultivating a high-performing team that values autonomy, flexibility, and the right support to excel in their roles. We believe in ambitious visions, rapid iterations, and a profound commitment to our mission. If you identify with these values, we invite you to apply.Our team comprises experts in machine learning, product development, engineering, conversational design, clinical support, growth, and operations, with offices in New York City and London.As a well-funded Series A startup, we have successfully secured $93M in investments from renowned firms, including Andreessen Horowitz, Radical Ventures, and Forerunner Ventures, alongside some of the most respected names in tech.Your RoleAs the Engineering Manager, you will oversee a product-oriented engineering squad dedicated to the continuous development of Ash. You will collaborate within a cross-functional team encompassing Product, Design, and Engineering, working closely with our Product Manager, Kieran Davies, to navigate ideas, define strategic directions, and convert ambiguity into actionable plans.We seek an approachable leader who earns the respect of engineers and fosters an environment that encourages exceptional work. Your focus will be on strategic decision-making regarding product development while maintaining hands-on involvement in our applications, prototypes, and infrastructure. This position is ideal for someone who enjoys a balance between leadership and technical contribution, prioritizing context over control, and values a cohesive, high-performance team.In this managerial capacity, you will promote clarity, stimulate constructive discussions, and assist engineers in adjusting to shifting priorities. Embracing change as a pathway to progress, you will view setbacks as opportunities for growth.

We have successfully secured $60 million in Series B funding at a valuation of $685 million - read about it here! About LawhiveAt Lawhive, our mission is to democratize access to legal services for everyone. The legal industry has long been entrenched in outdated technology and processes; we are changing that by completely reinventing the model with our proprietary AI-driven operating system at its core.As a regulated law firm equipped with an AI-native platform, we are here to enhance legal expertise and transform how law is practiced, leading to outstanding results for both our clients and our legal professionals.Lawhive Labs is the embodiment of our vision, functioning as our innovative frontier lab that merges the best in engineering, design, AI, and legal expertise from across the globe to construct the future of law.We are supported by top-tier investors, including Google Ventures, Balderton Capital, and TQ Ventures, and in early 2026, we secured a $60 million Series B funding round aimed at driving our international expansion and growing our talented team.Headquartered in London, we successfully launched our services in the US in 2025—and this is just the beginning.Engineering at LawhiveOur engineering team, consisting of 40 skilled engineers and researchers, is responsible for architecting, developing, and managing Lawhive’s platform, which is trusted by hundreds of legal professionals daily across the UK, US, and beyond.We have numerous challenges ahead and many yet to discover! In the upcoming year, our focus will be on:Innovating the user experience for lawyers' AI interactions, moving beyond traditional chat interfaces to create a new paradigm for human-machine interaction.Incorporating modularity and country independence into our platform. Following our recent expansion into the US, we aim to establish the world’s first global consumer law firm.Delivering full-stack AI-native legal services: we are not just developing software; we are an AI-native law firm.The RoleIn this role, you will be instrumental in advancing Lawhive’s platform, positively impacting our clients and driving Lawhive's mission forward.

About UsAt Conduct, we are pioneering an AI-driven operating system specifically designed for Enterprise IT. Our mission begins with tackling the critical challenges of daily operations, maintenance, and change management associated with essential enterprise systems.In some of the world’s largest corporations, a significant number of internal analysts and developers, alongside external consultants, devote their time to deciphering custom code, addressing incidents, analyzing procedures, and preparing system change requests. This results in an astonishing cost of hundreds of millions of dollars annually just to maintain core systems, which hinders innovation at the heart of the business.Conduct fundamentally transforms this landscape. We are the first system to comprehend enterprise applications comprehensively: from individual code lines to complex logic and complete system interdependencies. Our technology reasons about these elements with the precision of top human experts, but at machine scale. Initially focusing on SAP, the foundation of over 90% of global commerce, we empower clients such as Daimler Truck, Rittal, and Heidelberg Materials to automate system analysis, resolve issues within minutes, reduce IT expenditures by millions, and expedite ERP transformations by months.But SAP is just the beginning. We envision a future where enterprise systems are autonomous, self-repairing, and perpetually optimizing across the software spectrum. We aim to transform Enterprise IT from a bottleneck into a catalyst for accelerated innovation.Our team, characterized by high talent density, comprises approximately 20 individuals, established by former leaders from Palantir. Our hiring philosophy is straightforward: we seek only the most ambitious, driven, and dedicated professionals eager to develop groundbreaking technology within a culture that values intensity, ownership, and rapid execution.If you aspire to influence the next chapter of Enterprise System Intelligence, Conduct is the ideal place for you to embark on the most significant journey of your career.Role OverviewWe are in search of AI-native Product Engineers: exceptional software engineers with a natural aptitude for collaborating with Large Language Models (LLMs).You possess the ability to rapidly prototype, effectively refine prompts, and develop production-ready, end-to-end features that have a meaningful impact. Your interest in AI is matched by your capability to deliver tangible results, backed by your solid engineering expertise.

Join Lendable’s MissionLendable is dedicated to revolutionizing the credit landscape by creating cutting-edge technology that empowers individuals to access credit and save money effectively. As one of the UK’s newest unicorns, we are rapidly establishing ourselves among the fastest-growing fintech companies.With a dynamic team of over 700 professionals, we have been profitable since 2017 and are supported by esteemed investors including Balderton Capital and Goldman Sachs. Our customer satisfaction speaks volumes, boasting a remarkable rating of 4.9 from tens of thousands of reviews on Trustpilot.Having successfully reconstructed the Big Three consumer finance products—loans, credit cards, and car finance—we are committed to providing our customers with quick access to funds. Our vision extends to expanding into major markets like the UK and US, targeting outdated banking systems and improving user experiences.Why You Should Join UsOwnership: Take charge from day one and influence Lendable’s trajectory.Exceptional Teams: Collaborate with a small group of innovative individuals dedicated to solving complex challenges and improving existing solutions.In-House Technology: Develop top-tier technology using machine learning and AI to optimize processes and enhance efficiency.Role OverviewWe are in search of a hands-on AI Engineer to bolster our Internal Automation team. Your role will focus on enhancing the efficiency of various internal teams, including Finance, Compliance, Product, and QA, through the development of AI-driven tools and automated workflows. Working within a compact team of four engineers and one project manager, you will play a vital role in streamlining operations, minimizing friction, and allowing colleagues to devote more time to high-priority tasks.

Join WatershedWatershed is at the forefront of enterprise sustainability solutions, empowering businesses such as Airbnb, Carlyle Group, FedEx, Visa, and Dr. Martens to effectively manage climate and ESG data. Our platform generates audit-ready metrics for both voluntary and regulatory reporting, including CSRD, while driving genuine decarbonization efforts. We seek passionate individuals eager to build impactful products, thrive in a mission-driven startup environment, and contribute to shaping the culture of an expanding team.With offices in San Francisco, New York, Denver, London, Paris, Berlin, Sydney, Mexico City, and a remote workforce across the US and Europe, we hope you’ll consider being part of our journey!Your RoleWe are in search of a dedicated software engineer to join our sustainability AI reporting team. As a key member of a cross-functional team, you will develop cutting-edge AI tools that assist businesses in managing and reporting their sustainability progress. Utilize LLMs, embeddings, and other AI technologies to deliver customer-centric features and help establish the technical framework for AI at Watershed.This position is based in our London HQ for 4 days a week.ResponsibilitiesDeploy code to production on day onePrototype, develop, and iterate on new product areas, equipping our customers with powerful AI tools for information extraction and report generationProductionize and launch core technologies that enhance AI capabilities based on extensive operational sustainability dataStay abreast of AI advancements to assess their relevance for WatershedWrite efficient, well-structured, tested, and maintainable code across our technology stackQualificationsYou may be a great fit if you possess:3+ years of software engineering experience, preferably in Node.js web developmentExperience in developing customer-facing products rooted in user needsEnthusiasm for joining a startup and contributing to the evolution of a growing engineering teamStrong full-stack development skills with a solid understanding of modern web technologies

Established in 2018, Causaly is at the forefront of transforming enterprise-level scientific research through its innovative AI platform. Our technology empowers researchers to efficiently discover, visualize, and interpret extensive biomedical knowledge while automating essential research workflows, thereby hastening the development of solutions for critical health challenges.We collaborate with some of the largest biopharma companies and prestigious institutions, addressing diverse use cases that encompass Drug Discovery, Safety, and Competitive Intelligence. To learn more about how we enhance knowledge acquisition and decision-making processes, visit our blog: Blog - Causaly.We are proudly supported by renowned venture capital firms including ICONIQ, Index Ventures, Pentech, and Marathon.About the TeamWe are seeking talented AI Engineers to join our mission of revolutionizing research outcomes in biomedical sciences. Our team leverages generative AI and intelligent agents to assist scientists in uncovering novel insights and connections from biomedical literature and datasets.Enhancing the research experience is more than just adopting the latest LLM model; it requires building trust with our users through the integration of effective guardrails, rigorous biomedical curation, consistent update cycles, and robust deployment practices. This approach ensures that our platform serves as a comprehensive resource for researchers.We are in search of AI Engineers who are passionate about applying AI to transform how biomedical professionals conduct their research and daily inquiries.Your Responsibilities· Design and implement end-to-end ML/AI solutions, from conceptualization and data exploration to deployment and monitoring, striking a balance between cutting-edge techniques and practical application to deliver tangible results.· Employ strong software engineering principles such as modularity, testing, code reviews, CI/CD, and observability to ensure AI systems are dependable, maintainable, production-ready, and adaptable to future advancements.· Evaluate various approaches including classical ML, NLP techniques, LLM-based solutions, and agentic solutions to determine the best fit for the problem at hand, considering trade-offs related to speed, cost, complexity, interpretability, and performance.· Collaborate closely with product, design, and engineering teams to define project scope, align on success metrics, and iteratively enhance user-facing features powered by AI.

Role Overview airapps is hiring an AI Product Manager based in the London Metropolitan Area. This position focuses on guiding the development of AI products that improve user experiences and support business growth. What You Will Do Lead product development for AI-driven solutions Work closely with teams across engineering, design, and business functions Identify market needs and opportunities for new AI products Define product vision and strategy in line with company objectives Drive execution from concept through launch Location This role is based in the London Metropolitan Area.

About UsHarmattan AI is at the forefront of defense innovation, crafting autonomous and scalable defense systems. With a recent $200 million Series B funding round, which elevated our company valuation to $1.4 billion, we are on an exciting growth trajectory, expanding our teams to deliver mission-critical solutions to allied forces.Our core values drive us: we are committed to developing technologies that make a tangible impact, excelling in our endeavors, setting ambitious goals, and tackling the most challenging technical issues head-on. We thrive in a rigorous environment that demands ownership and meticulous execution.About the RoleWe are in search of a Senior Product Marketing Content Manager to spearhead the creation and execution of mission-centric marketing content at Harmattan AI. This role involves translating complex defense technologies into authoritative materials tailored for government clients, military personnel, and industry partners. Working collaboratively across Product, Engineering, and Sales teams, you will ensure our solutions are communicated with clarity, credibility, and strategic impact.ResponsibilitiesDrive the creation of product marketing content that highlights technical excellence and mission relevance.Develop and oversee a comprehensive portfolio of marketing assets, including brochures, product briefs, presentations, white papers, and sales enablement materials.Collaborate with Product and Engineering teams to craft precise and persuasive technical narratives.Maintain consistent product positioning and messaging across all platforms.

Join hyperexponential as a Lead Software EngineerAt hyperexponential, we are at the forefront of innovation, creating a groundbreaking AI-powered platform that transforms decision-making in the $7 trillion insurance industry. Our technology influences vital outcomes, from the successful launch of rockets into space to the efficient deployment of autonomous vehicles and the swift recovery of communities after disasters.For too long, insurers have relied on outdated tools to make multi-billion dollar decisions. We are revolutionizing this landscape. Our platform seamlessly integrates data, AI, and expertise, providing insurers with a rapid pathway from submission to decision, empowering them to act with agility, intelligence, and confidence.With backing from esteemed investors like a16z, Highland Europe, and Battery Ventures, we are expanding our global footprint and have earned the trust of nearly 50 of the world’s largest insurers, boasting zero churn and billions in premiums flowing through our platform.What began as a singular product in one market has swiftly evolved into a comprehensive, multi-product platform that supports every aspect of pricing and underwriting. AI is embedded in our core operations, from developing the world’s first domain-specific AI peer programmer for insurance to innovating workflows that redefine industry standards.At hyperexponential, our strength lies in our people. Here, your impact is not determined by your title or tenure, but by the challenges you embrace and the discipline you exemplify. Surrounded by a team that pushes boundaries, you will engage in the most meaningful work of your career in an environment built to thrive.If this resonates with you, we invite you to join us in shaping the future.About the hxAI TeamAt hx, AI is not an accessory; it is integral to our mission. We are transforming the insurance software landscape through generative AI. Our team merges advanced LLM technology with deep industry knowledge to tackle challenges that others overlook.Currently, we are focused on two flagship products: a powerful ingestion engine that converts unstructured insurance documents into actionable insights, and our flagship offering, an AI peer-programmer embedded in a custom IDE, revolutionizing how actuaries and underwriters model risk and make critical financial decisions.This is applied AI that delivers tangible results. As a Lead Software Engineer, you will be part of an agile, high-ownership team that drives innovation and directly influences how AI reshapes the industry.

Join us as a Senior AI FullStack Engineer at a rapidly expanding AI FinTech company, where your expertise will help shape the future of finance.About Us:We develop and deploy AI-powered tools and intelligent agents throughout their entire lifecycle, from conception to production.Our systems are designed with AI at their core, not as an afterthought.Transform experimental concepts into production-ready features that impact real users.Take ownership of projects from problem identification to user adoption.Collaborate closely with engineering and product teams to seamlessly integrate AI into daily operations.Establish effective methodologies for implementing AI in production environments.We are on a mission to create an AI-native bank tailored for ambitious businesses.Your Contribution:Train and refine large-scale audio and multimodal models.Design and execute experiments focused on architecture, data mixtures, and training strategies.Develop and enhance audio data pipelines.Optimize inference speed, latency, and overall production readiness.Deploy models in end-to-end, low-latency settings.Create meaningful evaluation metrics that go beyond standard benchmark scores.Work collaboratively with both research and engineering teams.This role is hands-on, bridging the gap between research and real-world application.Technical Environment:PythonLarge Language Models (LLMs) and AI toolsPostgreSQL, BigQueryTypeScript, ReactAWS, GCPDocker, Terraform, GitHub(Detailed technical stack will be shared during the interview process)Your Expertise:5+ years of experience in building and deploying production systems.Full-stack or deep backend/platform engineering skills.AI-native mindset: you leverage AI in your daily work and think in terms of agents, workflows, and automation.Product-focused: your priority is user adoption over mere output.You excel at transforming complex challenges into scalable solutions.Bonus Skills:Experience in financial technology.Familiarity with cloud services and infrastructure.Contributions to open-source projects.

About LendableLendable is dedicated to creating cutting-edge technology that empowers individuals to secure credit and save money effectively. As one of the UK’s newest unicorns, our dynamic team of over 700 is driving growth in the fintech sector:Recognized as one of the fastest-growing tech companies in the UK.Achieved profitability since 2017.Supported by prominent investors, including Balderton Capital and Goldman Sachs.Highly rated by customers, boasting an impressive 4.9 rating across thousands of reviews on Trustpilot.To date, we have reimagined three major consumer finance products: loans, credit cards, and car finance. Our commitment is to deliver funds to our customers within minutes, rather than days.As we expand, we are targeting the two largest Western markets (the UK and US), where vast amounts of financial products are still managed by traditional banks with outdated systems and cumbersome processes.Join Us If You Want ToTake ownership of a broad scope of responsibilities, making impactful decisions that shape the future of Lendable from day one.Collaborate with a small team of exceptional individuals who are resourceful and innovative in solving problems and challenging the status quo.Develop top-tier technology in-house, utilizing new data sources, machine learning, and AI to automate and optimize processes.About the RoleWe are seeking a proactive AI Engineer to join our Internal Automation team at Lendable, aimed at enhancing operational efficiency across the organization.Your mission will be to empower internal teams—from Finance and Compliance to Product and QA—by creating AI-driven tools, integrations, and automated workflows. You will work closely with a compact team (4 engineers, 1 PM) focused on reducing friction, automating monotonous tasks, and allowing colleagues to dedicate more time to high-value activities.

At Intercom, we are redefining customer service through innovative AI solutions, ensuring businesses can provide exceptional customer experiences.Our flagship product, Fin, is recognized as the most advanced AI customer service agent on the market, allowing companies to deliver seamless, around-the-clock support while enhancing overall customer interactions. When paired with our Helpdesk, it evolves into the complete Intercom Customer Service Suite, catering to intricate queries that necessitate human intervention.Since our inception in 2011, Intercom has gained the trust of nearly 30,000 businesses globally, setting new benchmarks in customer service. We are committed to our core values, which drive us to push boundaries, operate with agility, and consistently offer unparalleled value to our clients.What’s the opportunity?As a Product Engineer at Intercom, your role will be pivotal in addressing real customer challenges through the intelligent and efficient application of your technical expertise. You will become an integral part of our multidisciplinary product teams, developing both back-end and front-end systems while collaborating closely with designers, product managers, researchers, and data analysts.We are currently navigating exciting scaling challenges as we build a resilient platform where your skills can be utilized in various areas such as crafting a user-friendly messenger composer, implementing rule matching, ensuring deliverability, upholding security, enhancing app availability, and leveraging machine learning, among others.What will I be doing?As a seasoned engineer, you will:Develop comprehensive technical plans and contribute to our architectural strategy as we scale our products to accommodate tens of millions of users daily.Craft Ruby code that integrates a variety of AWS, infrastructure, platform, and SaaS technologies that constitute the backbone of Intercom’s backend infrastructure.Deploy a change to production on your first day and launch a feature within your first week. This “day one” change is seamlessly integrated into production alongside numerous other deployments.

Aircall develops an AI-powered customer communications platform that serves over 22,000 companies worldwide. The platform brings together voice, SMS, WhatsApp, and AI features to help teams increase revenue, resolve issues quickly, and scale customer-facing operations. With headquarters in Paris and offices in London and other major cities, Aircall continues to expand its reach and invest in AI innovation. The company values customer satisfaction, data-driven decisions, and meaningful results. Ownership, ongoing learning, and collaboration are central to the team culture. People who thrive at Aircall appreciate making a tangible impact within a supportive, team-focused setting. Role overview The AI Productivity Engineer joins the Engineering Productivity (EngProd) team in the London office. The focus is on building and deploying AI-powered tools that streamline engineering workflows. Day-to-day work includes reducing friction, automating repetitive engineering tasks, and integrating intelligent solutions into routine activities. This position is not research-oriented or customer-facing. Instead, the emphasis is on delivering practical, production-ready AI systems that engineers use internally. The tools and systems developed will directly improve engineering efficiency across the organization. This role fits someone who enjoys creating reliable systems that others depend on, with a focus on long-term value over following short-lived trends.

About UsJoin Luminance, a trailblazer in Legal-Grade™ AI solutions for the enterprise sector. Supported by esteemed venture capitalists and recognized in the Forbes AI 50 list of ‘Most Promising Private AI Companies in the World’ as well as Inc. 5000’s ‘Fastest Growing Companies in America’, we are transforming the legal industry on a global scale.We are on the lookout for a dynamic AI Product Engineer who is ready to take full ownership of impactful AI tools. This role transcends conventional development; we seek a visionary builder and problem-solver who can turn vague concepts into essential software applications. While a formal computer science degree is not mandatory, we value self-motivated individuals adept at leveraging cutting-edge AI tools to deliver results swiftly.Key Responsibilities Design, prototype, and deploy autonomous AI systems that effectively address strategic business challenges. Rapidly convert abstract requirements into functional prototypes, and lead the push to production. Troubleshoot and resolve complex issues throughout the technology stack, encompassing AI model behavior, middleware, and deployment configurations. Present your work within the company and contribute to our internal narratives around innovation. Create comprehensive documentation and rollout plans for new tools, ensuring user adoption. Continuously assess new AI models, frameworks, and coding tools to enhance efficiency and quality. Requirements Proven ability to develop and deliver AI-enabled products or prototypes (whether through professional experience, academic pursuits, or self-taught endeavors). Exceptional problem-solving abilities: capable of transforming ambiguous challenges into functional code and structured workflows. Extensive technical knowledge: proficient with Python, APIs, full-stack frameworks, and JSON. Familiarity with Large Language Models (LLMs): understanding their capabilities and limitations, with experience integrating them into practical systems. Outstanding communication skills: able to collaborate effectively with executives, stakeholders, and non-technical users. Curiosity, determination, and creativity: eager to experiment, iterate, and navigate challenges until successful. Why Choose Luminance? Work on the forefront of applied AI in the legal field, one of the most impactful sectors globally. Collaborate with a distinguished, multidisciplinary team that encompasses law, AI research, and product development. Experience the freedom of a startup culture backed by prominent international venture capitalists. Benefits Central London office location. Pension scheme with Aegon, RetireReady. Health insurance with BUPA - all employees are eligible for enrollment for themselves and dependents from Day 1 at Luminance. Life Insurance.

Join Us at NousDid you know that over 85% of households are overpaying on their bills? At Nous, our mission is to simplify life and advocate for fairness, starting with the 30 million households in the UK and aiming to expand further.Nous is tackling this significant yet often neglected issue. Our platform has helped users save substantial amounts of money—like Rob, who saved £1,030 annually, and Christian, who saved £950 yearly. With thousands of satisfied users, our Net Promoter Score proudly remains in the high +80s. We’ve been frequently featured on television and in print, discussing cost-of-living consumer challenges.Our product is an AI-powered assistant designed to help households effectively manage their bills, ensuring savings in both time and money. While it appears user-friendly, it’s one of the most ambitious consumer AI systems in the UK. We’re not just following trends; we are setting them. If you're looking for a straightforward task, this role isn’t for you.As a rapidly growing, well-funded start-up led by seasoned entrepreneurs, we have assisted over 150,000 individuals since the onset of the cost-of-living crisis.Nous is a B Corp, recognized for our dedication to high standards of social and environmental performance, transparency, and accountability. We take pride in our social impact.Since our launch last year, we’ve expanded our service across various channels—directly to consumers and through employers aiming to help their teams retain more of their hard-earned money using Nous. We are currently growing at over 10x year-on-year (~30% month-on-month) and have saved our customers over half a million pounds in just the last few months!The work is challenging. We move quickly, think critically, and maintain high standards. We embrace an office-first culture (conveniently located near Farringdon station) because we believe that vibrant collaboration leads to better results. Our kitchen is well-stocked, the coffee is excellent, and the team is outstanding.If you are exceptionally talented and eager to contribute to an incredible project, we want to hear from you.

Senior Product EngineerAbout the PositionCaribou is seeking a talented and experienced Senior Product Engineer to elevate our product team. This key role demands a full-stack engineer with a strong product intuition and proven history of transforming innovative ideas into successful products from inception to launch.As we harness the latest in AI and LLM technology, your expertise in these areas will be crucial. You should be well-versed in contemporary techniques and capable of building independently, even in the absence of a dedicated design team.Your primary responsibility will be to translate raw business objectives into impactful customer-facing features, ensuring a top-tier customer experience. You will guide the entire product development lifecycle, from understanding real user issues to crafting thoughtful solutions and implementing them across our technology stack.This position intersects engineering, product development, AI, and design. Collaborating closely with founders and cross-functional teams, you will tackle ambiguous challenges and deliver elegant, scalable solutions that enhance our customer experience.Your ResponsibilitiesLead the full-stack development of new product features from initial concept through to production deployment.Engage in product discovery: analyze customer feedback, map user workflows, identify opportunities, and prioritize feature development.Utilize AI and LLMs to enhance product capabilities, streamline development processes, and innovate complex tax workflows.Work alongside the tax team to deeply understand user needs and translate them into actionable product enhancements.Make informed decisions regarding infrastructure and architecture to ensure high-performance, reliable feature delivery.Enhance code quality by writing maintainable code, contributing to design systems, and refining engineering practices.Job Requirements5+ years of experience as a full-stack or product-focused engineer in a web application startup environment.Strong technical proficiency in modern front-end frameworks and back-end technologies.

Join Our Team as a Senior Product Engineer (AI)At Plain, we're revolutionizing customer support for the next generation of B2B enterprises. Our goal is to create the fastest and most powerful platform that enables businesses to transition from reactive support methods to building genuine relationships with their customers.Renowned companies like Cursor, Raycast, and Granola rely on Plain to centralize customer interactions, enhance team collaboration, and elevate workflows through advanced AI technology.The landscape of B2B customer support is evolving dramatically, with AI paving the way for innovative customer engagement strategies. Support has shifted from being a disconnected, slow process to a cohesive, company-wide initiative that spans channels like Slack, Discord, and beyond. The traditional methods just can't keep up anymore.This position is hybrid, requiring 3 days a week in our London office.Your RolePlain is in an extraordinary position, already powering support solutions for high-growth businesses with our incredibly fast and scalable platform. AI has been integral to our offering from day one, and now we’re committed to deepening its impact across all facets of modern customer support.We are on the lookout for a Senior Product Engineer with a passion for customer success to elevate our AI initiatives. In this role, you will develop the infrastructure necessary for rapid, secure, and confident delivery of AI features, taking ownership of challenges from inception to execution and playing a pivotal role in crafting a category-defining product.In this role, you will:Take full ownership of AI functionalities, including agents, assistants, insights, and beyond—from concept through to production.Design and implement backend services that support AI integrations and data pipelines.Create robust APIs and abstractions for internal AI applications.Enhance system scalability through caching, optimization, and processing patterns.Contribute to the evolution of our AI infrastructure, including architecture, evaluation, and iteration pipelines.Tackle complex challenges surrounding AI accuracy, reliability, and quality using rigorous quantitative methods.Represent our work externally through writing, speaking engagements, and connections with the broader AI community.This Role is Ideal for You If You...Are an experienced backend engineer with a proven track record of shipping AI products in the era of OpenAI and Anthropic, particularly in text and data-intensive AI applications.Possess a deep understanding of AI technologies and their applications in real-world customer support scenarios.

About UsPhysicsX is an innovative deep-tech enterprise rooted in numerical physics and the high-speed world of Formula One. We are committed to revolutionizing hardware innovation at a pace comparable to software advancements.Our mission is to develop an AI-powered simulation software stack that serves engineering and manufacturing sectors across advanced industries. By facilitating high-fidelity, multi-physics simulations through AI inference throughout the engineering lifecycle, PhysicsX empowers engineers to optimize and automate design, manufacturing, and operational processes, enabling them to explore unprecedented possibilities. Our clientele includes some of the foremost innovators in Aerospace & Defense, Materials, Energy, Semiconductors, and Automotive.We are on the lookout for a talented Senior Product Designer who is passionate about crafting innovative, user-centered design solutions for enterprise applications. In this pivotal role, you will operate at the convergence of AI, engineering, and design, shaping intuitive workflows for expert users navigating complex systems. You will collaborate with cross-functional teams to create state-of-the-art 2D and 3D interfaces that tackle real-world challenges and elevate user-centered design.