Senior Software Engineer - Platform Runtime

Role Overview Writer is hiring a Senior Software Engineer to help build and improve our Enterprise AI Platform. Based in London, this role centers on designing and developing software that supports efficiency and better user experiences for a range of clients. What You Will Do Develop and maintain software for our Enterprise AI Platform Work with cross-functional teams to deliver reliable and scalable solutions Contribute ideas and technical expertise to shape the direction of AI products at Writer Collaboration This position works closely with engineers, product managers, and other teams to ensure our software meets client needs and quality standards. Your input will help guide the evolution of AI tools within the company.

Join Multiverse as a Senior Software Engineer specializing in Platform Engineering. In this pivotal role, you will leverage your expertise to design, build, and enhance our platform, ensuring it meets the highest standards of performance and reliability. Collaborate with cross-functional teams to deliver robust solutions that drive the success of our innovative programs.

Join our dynamic team at physicsx as a Senior Software Engineer focused on Platform Operations. In this role, you will be instrumental in enhancing our platform's performance and reliability, ensuring exceptional user experiences. You will collaborate with cross-functional teams to design, develop, and implement robust software solutions that meet the evolving needs of our users.

Role overview Multiverse is looking for a Senior Software Engineer to help build and improve the Trusted Enterprise Platform. This role focuses on developing secure, reliable systems that support business needs. The work centers on creating and refining platforms that companies depend on for daily operations. What you will do Design and implement software that strengthens security and reliability for enterprise clients Work closely with teams across engineering, product, and other functions to deliver strong solutions Contribute ideas and technical expertise to improve platform features and performance Location This position is based in London.

Join Algolia as a Senior Software Engineer specializing in User Interface and Connectors Platform. In this pivotal role, you will contribute to the development of innovative UI solutions that enhance user experience across our platform. Collaborate with a talented team of engineers to design, implement, and optimize various connectors, ensuring seamless integration with our services.We are looking for a candidate who is passionate about technology, thrives in a fast-paced environment, and is eager to push the boundaries of what is possible in software engineering.

About Light.At Light, we are on a mission to transform outdated factory-era ERPs into dynamic, living software. Our Smart Financial Platform equips modern, global businesses with capabilities like automated accounting, real-time reporting, and financial workflows that evolve with their pace.Creating alongside our customers, we prioritize speed and craftsmanship. In a short span, we've evolved from a concept to a vital resource for renowned companies such as Lovable, Legora, and Keyshot. Our users don’t just work with Light—they enjoy using it.As a pioneering team, we are creating a new software category. Imagine engineers passionate about finance, designers focused on reconciliation, and operators treating finance as a product. If you’re enthusiastic about revolutionizing financial workflows, you’re in the right place.Supported by top-tier investors and guided by industry leaders, we are developing groundbreaking products with the freedom to innovate boldly and take ownership of our results. Join us in making Light the global standard for next-gen finance.The AI Platform Engineer RoleAs a member of the Foundation Team, which acts as the catalyst for our engineering organization, you will play a pivotal role in architecting our internal

Join Peregrine Technologies, a forward-thinking company backed by top Silicon Valley investors, as we empower public safety organizations, government agencies, and the private sector to tackle societal challenges with groundbreaking speed and precision. Our AI-driven platform transforms isolated data into actionable intelligence, enabling swift, informed decisions that enhance outcomes at every touchpoint. With a client base spanning over 30 states and two countries, serving more than 125 million people, we are on an exciting trajectory of growth into enterprise and international markets.TeamOur engineering team prioritizes empathy as the key to developing effective solutions. Understanding user interactions with our product is crucial to achieving the best outcomes. As a part of our Foundations team, you will collaborate with detail-oriented engineers focused on driving innovation and enhancing performance through technical excellence. We are responsible for maintaining the performance of our mission-critical infrastructure and spearheading high-stakes initiatives that unlock unprecedented capabilities.We emphasize both ownership and teamwork; you will have full accountability for major features while working closely with fellow engineers to see them through to completion. We believe that humility and empathy are vital for developing the right solutions, and you will engage directly with our deployment team and users to iterate and resolve their challenges. Creativity and perseverance are essential as we strive to execute our vision.RoleAs our first Software Engineer in the UK, you will have significant ownership across our technology stack, making impactful decisions that will shape our future for years to come. You will redefine the capabilities of our data platform by developing innovative features that enhance user experiences and operational efficiencies.

Join Algolia, a trailblazer and market leader in AI Search, where we empower over 17,000 businesses to deliver rapid, predictive search and browsing experiences at an internet scale. Every week, we handle more than 30 billion search requests—surpassing the combined total of Microsoft Bing, Yahoo, Baidu, Yandex, and DuckDuckGo.In 2021, we secured $150 million in Series D funding, elevating our valuation to $2.25 billion. This robust foundation allows us to continually invest in our top-tier platform and support exceptional clients like Under Armour, PetSmart, Stripe, Gymshark, and Walgreens.Algolia was designed to enhance user experiences by providing an intuitive search-as-you-type functionality for websites and mobile applications. Our search API is utilized by thousands of clients across 100+ countries, and billions of queries are resolved monthly thanks to the code we deploy daily.We are on the lookout for a Software Engineer to become part of our Metis team. This team manages Metis, our cloud-based scalable architecture for NeuralSearch, our cutting-edge AI search engine that integrates both keyword and vector search capabilities. The Metis system is composed of distributed components that manage the building and storage of indices containing customer data, subsequently querying that data to deliver search results. This role demands a deep understanding of and the ability to address challenges associated with complex distributed systems.Our team comprises engineers from diverse backgrounds, many of whom work remotely. Your unique experiences, knowledge, and perspectives will contribute to our diversity and drive the development of impactful products.

About OLIXAt OLIX, we are at the forefront of a technological revolution, creating the next-generation Optical Tensor Processing Unit (OTPU) that promises unmatched performance and energy efficiency. As AI rapidly evolves, we recognize the urgent need for innovative solutions that surpass outdated infrastructure. OLIX is dedicated to bridging the gap in AI capabilities, positioning ourselves as a leader in the next economic opportunity of the century.Role OverviewIn the role of Software Engineering Director - Platform Integration, you will spearhead a dynamic team of over 30 engineers and 5 managers across critical domains, including cluster orchestration, platform management, networking, and field engineering. Your leadership will be pivotal in ensuring OLIX’s systems function as a robust hyperscale AI infrastructure.We seek a visionary engineering leader who can shape OLIX’s trajectory and instill a culture of excellence. You will leverage your profound technical acumen to craft high-performing teams that operate with agility and purpose, establishing the technical roadmap that drives our company towards its objectives.Key ResponsibilitiesDefine and communicate a clear vision for Platform Integration, ensuring accountability across cluster orchestration, fleet management, networking, and deployment.Cultivate a high-performing organization by mentoring managers to prioritize customer outcomes and reliability.Establish standards for technical excellence, including architectural principles, review processes, and quality benchmarks.Guide the technical strategy for distributed AI workloads, making informed decisions on investments in cluster orchestration and management systems.Translate OLIX’s long-term business goals into actionable priorities that enhance customer and business outcomes.Foster a vibrant culture emphasizing innovation, speed, and operational excellence.QualificationsProven engineering leadership experience in software development and systems integration.Deep technical expertise in AI infrastructure and distributed computing.Exceptional communication and interpersonal skills, capable of inspiring teams.

Join Contentful as a Senior Backend Engineer specializing in our cutting-edge AI Platform. In this pivotal role, you will architect and develop robust backend systems that support our innovative AI solutions. Collaborate with a dynamic team of engineers and data scientists to design scalable APIs and enhance our platform's capabilities.

Join Wise, a leading technology company, as a Senior Software Engineer specializing in our cutting-edge marketing platform. In this role, you will be instrumental in designing, developing, and optimizing features that enhance our customer experience and drive engagement. Collaborate with a talented team of engineers and product managers to deliver scalable solutions that align with our business goals.

Join PhysicsX as a Senior Software Engineer specializing in our AI Workbench. In this pivotal role, you will lead the development of cutting-edge artificial intelligence solutions that empower our clients to harness the full potential of data and analytics. Your expertise will contribute to the design and implementation of scalable software architectures, ensuring robust performance and reliability. You will collaborate with cross-functional teams to define project requirements and engage in hands-on coding, code reviews, and mentoring junior engineers. If you are passionate about AI and eager to push the boundaries of technology, we want to hear from you!

Who Are We?Postman is the premier API platform, utilized by over 45 million developers and 500,000 organizations, including 98% of the Fortune 500. We empower developers and professionals worldwide to create an API-first ecosystem by simplifying each phase of the API lifecycle and enhancing collaboration, allowing users to build better APIs, faster.Headquartered in San Francisco, we maintain offices in Boston, New York, Austin, Tokyo, London, and Bangalore—where Postman originated. As a privately held company, we are backed by esteemed investors including Battery Ventures, BOND, Coatue, CRV, Insight Partners, and Nexus Venture Partners. Discover more at postman.com or connect with us on X via @getpostman.P.S: We recommend exploring The "API-First World" graphic novel to grasp our broader vision at Postman.The OpportunityThe Client Platform team is on the lookout for a Senior Frontend Engineer to elevate our UI Platform standards and enhance our frontend ecosystem. You will champion engineering excellence through refined architecture, performance enhancements, and sustainable coding practices, ensuring our platform provides outstanding experiences.Collaborating with fellow senior engineers, you will oversee various components of our UI Platform (including design systems, accessibility, internationalization, theming, etc.). This represents a unique chance to make a significant impact on the foundation that hundreds of Postman engineers and our 40+ million customers rely on daily.What You’ll DoThe Client Platform team is a global engineering unit responsible for establishing a streamlined environment for all Postmanauts to develop and deploy web applications. Our platform serves as the backbone for over 240 engineers at Postman who depend on it to launch new features and enhancements to more than 40 million users.Design and implement scalable, maintainable front-end solutions, focusing on the presentation layerDesign system and component libraryApplication shell & layoutSpecialized UI components (code editor, text editor, data grid)Global UI patternsAccessibilityInternationalization/localizationTheming/styling architecture

Join Longshot Systems, a pioneering company dedicated to developing cutting-edge platforms for sports betting analytics and trading.We are in search of a Senior Software Engineer to become a vital member of our trading platform team. As a small but highly focused organization, we seek an individual who can effectively architect and implement solutions to achieve our upcoming product, performance, and stability objectives. This role involves ownership of our technical standards, coding guidelines, CI/CD processes, observability, and security measures. If you are passionate about delivering features and enhancing the overall technical excellence of our team and platform, we want to hear from you.Our trading platform is responsible for integrating with numerous bookmakers and exchanges globally, normalizing and consolidating global odds data across various sports for internal trading strategies. We manage thousands of odds updates and trades per second, maintaining stringent standards for latency, correctness, and feed quality. You will be at the forefront, integrating additional trading venues, optimizing key platform components, and enhancing the safety and speed of trading. Our team also oversees a large historical data repository, supporting the company's broader trading and research initiatives.Our key platform systems are primarily built using Golang, featuring message buses and databases at the core of our architecture. While fluency in Golang is advantageous, it's not a prerequisite, as we have a team full of experts ready to assist you in learning.We embrace a hybrid work model, with Thursdays in our London office (Farringdon) and flexible arrangements for the rest of the week. Our standard working hours are 10 AM to 6 PM UK time, Monday through Friday, with support for flexible schedules to help our team achieve their objectives.

Join Us at ConveoAt Conveo, we are pioneering an AI research platform that facilitates rapid, cost-effective, and high-quality consumer and B2B research. Our innovative AI video interviewer is trusted by global brands such as Unilever, Google, and Orange, empowering insights across marketing and product teams.Why This Role MattersTraditional research methods are often slow, costly, and lack depth. They require specialized expertise, which can be a barrier for many organizations. By addressing these challenges, we enhance how companies comprehend and serve their customers.Your Future TeamYou will be part of an exceptionally skilled and passionate team dedicated to pushing boundaries while enjoying our work. Our collective experience spans decades in market research, engineering excellence, and entrepreneurship.Our Work CultureWe prioritize our clients and the solutions we offer, consistently going above and beyond.Our engineering team collaborates directly with customers, fostering open communication.We balance hard work with fun, creating an energetic atmosphere.To maintain our high standards, we strive for a lean but effective team.About the RoleThis position transcends a traditional infrastructure role; we seek an individual who is adept at strengthening Kubernetes clusters, contributing to product features, and developing internal tools that enhance our product and engineering capabilities. As a Senior Platform Engineer, you will own the infrastructure and deployment platform that powers Conveo's AI research product while influencing the engineering approach. You will establish AI toolchains, workflows, and safeguards that allow our engineers to operate efficiently with automation and AI.This is a critical role with significant impact. You will build upon existing foundations and elevate how Conveo builds, deploys, and manages our systems at scale. As we expand from 8 to over 18 engineers this year, you will ensure our infrastructure evolves in tandem with our growth and customer needs.

About SequenceJoin Sequence and play a pivotal role in creating a transformative platform that empowers businesses to streamline their payment processes. Already processing over $1 billion in annual invoice volume, we're on a remarkable growth trajectory.Our cutting-edge, AI-powered revenue platform is designed specifically for modern finance teams, replacing outdated spreadsheets and clunky legacy systems with intuitive software that enhances productivity.Trusted by Cognition, incident.io, MoonPay, and more than 100 high-growth companies, we manage their entire revenue cycle—from quoting and billing to revenue recognition.Founded by experienced entrepreneurs, we achieved a remarkable 10x growth in ARR last year and recently secured a $20 million Series A led by 645 Ventures, with participation from a16z and esteemed founders and CFOs from notable companies like Decagon, Klaviyo, and Wise.What is it like to work at Sequence?At Sequence, you'll be part of a small team with significant opportunities for impact and ownership. You will engage in meaningful work, connect directly with customers, and grow with the company.If you're ready to do the best work of your career at a rapidly scaling company, we would be thrilled to meet you.The RoleWe are seeking skilled software engineers with robust backend and cloud infrastructure experience to develop and enhance the systems that drive billing for contemporary B2B companies.You will take ownership of infrastructure critical to our revenue stream, where precision is paramount and downtime is not an option. Our usage events platform processes each merchant action that influences customer billing, making it one of our most vital systems. You will contribute to the evolution of this platform to accommodate exponential growth while ensuring impeccable accuracy.This is a unique opportunity to join at an early stage where you can make significant architectural decisions while having real customers relying on your work. You'll design systems that manage high-velocity event streams, make technical choices that optimize cost and performance at scale, and establish infrastructure that prioritizes reliability.What You'll Do:Own critical event infrastructure. You'll develop systems that process customer usage data essential for billing and invoicing, designing event streaming pipelines that manage high throughput with minimal latency, and building robust systems where data accuracy is non-negotiable and uptime is measured in nines.

About the TeamAt OpenAI, our Platform Systems team is at the forefront of innovation, merging advanced AI technologies with large-scale distributed systems. We create the engineering and research infrastructure essential for training OpenAI’s premier models on some of the world's most powerful, custom-designed supercomputers.Our dedicated team develops critical model training software, delving deep into the technical stack to enhance collective communication, optimize compute efficiency, refine parallelism strategies, and improve fault tolerance, failure detection, and observability. The systems we engineer are pivotal to accelerating OpenAI’s research, ensuring reliable and efficient training at the cutting edge of technology.We foster close collaboration with researchers throughout the organization, consistently integrating insights from across OpenAI to advance our training platform.About the RoleAs a Software Engineer specializing in Platform Systems, you will architect and develop distributed systems that enhance visibility into large-scale training workloads, ensuring their reliable operation at scale.Your responsibilities will include engineering failure detection, tracing, and observability systems to identify suboptimal or malfunctioning nodes, revealing performance bottlenecks, and enabling engineers to optimize extensive distributed training jobs. This infrastructure is vital for the functionality of OpenAI’s training stack and is continuously evolving to accommodate new use cases and increasingly intricate workloads.This position is central to our training infrastructure, merging systems engineering, performance analysis, and large-scale debugging.In This Role, You WillDesign and implement distributed systems for failure detection, tracing, and profiling large-scale AI training tasks.Create tools to detect slow, faulty, or erratic nodes, providing actionable insights into system performance.Enhance observability, reliability, and performance across OpenAI’s training framework.Diagnose and resolve challenges in complex, high-throughput distributed environments.Collaborate with systems, infrastructure, and research teams to elevate platform capabilities.Adapt and extend failure detection and tracing systems in support of new training methodologies and workloads.You Might Thrive in This Role If YouPossess a strong passion for performance, stability, and observability in distributed systems.Have experience with large-scale systems and are excited to tackle complex challenges in AI infrastructure.

Join Us in Revolutionizing the Creator Economy with AIFanvue is a leading force in the rapidly evolving creator monetization landscape. Our AI-driven platform empowers creators to engage, connect, and earn directly from their audiences on a grand scale. Following our recent Series A funding, we have achieved over $100 million in annual recurring revenue, experiencing triple-digit growth year-over-year and supporting a vibrant community of hundreds of thousands of creators and millions of fans worldwide.As a Platform Engineer at Fanvue, your mission will be to streamline processes for our engineering teams. This role is pivotal in developing the infrastructure, tools, and foundational components that enable our product teams to deliver solutions swiftly, safely, and confidently at scale. Your ResponsibilitiesConstruct and uphold core platform infrastructure across diverse cloud environmentsEnhance CI/CD pipelines to facilitate rapid, secure, and consistent deploymentsDesign and implement observability, monitoring, and alert systems for platform servicesDevelop self-service tools and platform primitives that empower teams to operate independentlyCollaborate with product teams to assess infrastructure needs and eliminate obstaclesBoost reliability, scalability, and cost-effectiveness across core systemsManage incidents, perform post-incident analyses, and implement lasting solutionsContribute to the documentation, standards, and best practices for the platform Who You AreProven experience as a platform, infrastructure, or backend engineerProficient in working with cloud platforms and distributed systemsFamiliar with infrastructure as code, CI/CD systems, and monitoring toolsPossess a product-oriented mindset and a collaborative spirit

Role overview Funding Circle seeks a Senior AI Platform Engineer based in London. This role centers on shaping and improving AI-powered solutions that make small business financing more accessible. The focus is on designing, building, and refining machine learning systems that enable faster, more effective lending decisions. What you will do Design and develop AI platforms that can scale for production use Optimize machine learning systems to boost performance and reliability Partner with engineers, data scientists, and product managers to deliver solutions that have real impact Team and impact Work alongside a skilled team committed to creating technology that helps small businesses access funding efficiently. The results of your work will directly support Funding Circle’s mission to make finance more accessible for small businesses.