Lead Principal Software Engineer | London-Hybrid

Role Overview 8th Light, Inc. seeks a Principal Software Engineer for its London office. This hybrid role combines in-office and remote work, supporting both flexibility and close team collaboration. What You Will Do Lead software projects from planning through delivery Mentor junior developers and support their growth Work with cross-functional teams to build high-quality software products Promote technical excellence and encourage continuous improvement within the team Who We’re Looking For We value engineers with a track record of building reliable software, a collaborative approach, and a commitment to craftsmanship. Experience leading teams or projects is important. A willingness to share knowledge and help others grow is essential. Location London, England, United Kingdom (hybrid: in-office and remote work)

Role Overview 8th Light, Inc. is seeking a Senior Software Engineer to join its London-based team. This hybrid role offers the chance to work alongside experienced engineers on a variety of client projects. The company is a well-established software consultancy, known for its focus on quality and collaboration. What You Will Do Design, develop, and maintain software applications for a range of clients and industries Work closely with other engineers to deliver reliable, well-crafted solutions Mentor junior engineers, sharing knowledge and supporting their professional growth Contribute to a team culture that values learning and continuous improvement Location This position is based in London, England, with a hybrid work arrangement.

Join Our MissionAt Omnea, we’re transforming enterprise operations by focusing on the often cumbersome procurement process. Imagine a world where a single purchase no longer takes months, requiring 50+ emails and approvals from Finance, Legal, Security, and IT. We aim to change that.Backed by $75M from Khosla Ventures, Insight Partners, and Accel, our AI-driven platform seamlessly connects every stakeholder, step, and system to facilitate quick, safe, and efficient purchasing. Experience automated approvals, real-time supplier risk assessments, and complete visibility into spending—all from one centralized location.With a $7B+ untapped market, our growth trajectory speaks volumes. We have achieved a tenfold increase in Annual Recurring Revenue (ARR), reaching double-digit millions in just 18 months, and have earned the trust of global enterprises like Spotify, MongoDB, Monzo, and Albertsons. We are proud to be recognized as the 4th fastest growing startup in Europe.Our experienced team includes former members of Tessian, the cybersecurity tech firm backed by Sequoia, Balderton, and Accel, who have successfully scaled unicorns and launched world-class products. You will collaborate with industry leaders including Ben, Abs, Sabrina, and Rebe.Your RoleWe are on the lookout for an outstanding, product-focused full-stack software engineer to join our engineering team. As we aim to scale from our current double-digit customers to over 200 enterprise clients and significantly increase our revenue over the next 2–3 years, your contributions will be vital in driving our product, team, and company growth as we transition from a 'start-up' to a 'scale-up'.You will be joining us at a crucial moment. We recently secured $50M in Series B funding from Khosla Ventures, Insight Partners, and Accel.

Why VerifoneVerifone has been a pioneering leader in the electronic payment technology sector for over 40 years. Recognized as one of the foremost brands in electronic payment solutions, we rank among the largest providers of payment systems globally.At Verifone, we foster a diverse and dynamic work environment where results-driven employees have ample opportunities to excel. Our collaboration with top retailers, merchants, banks, and third-party partners enables us to innovate and deliver cutting-edge payment solutions worldwide. We are committed to excellence in our products and services, with an unwavering focus on customer satisfaction. Our team of dedicated professionals is at the forefront of the payments industry, driven by experience, innovation, and a bold spirit. Whether we're developing advanced secure payment platforms or exploring new markets for electronic payments, our passion for innovation propels each employee toward personal and professional success.About The RoleWe are looking for a Principal Software Engineer based in London to provide technical leadership for our global payment gateway systems. This role involves designing and evolving core platform capabilities, guiding architectural decisions across microservices, and mentoring engineers while remaining hands-on with critical systems built using Java and Spring Boot.This position is central to shaping the technical direction of systems responsible for processing high-volume, mission-critical financial transactions globally.In this role, you will go beyond mere feature delivery. You will be instrumental in driving architectural decisions, establishing engineering standards, and influencing how teams design, build, and maintain secure, scalable backend systems. Success is characterized by technical leadership, sound judgment in complex trade-offs, and ownership of systems that must operate reliably under real-world loads and regulatory requirements.Collaboration with senior engineering, platform, product, and infrastructure teams will be crucial to ensure our systems scale effectively, remain secure, and uphold the highest standards for availability and performance.

Join CoreWeave as a Principal Engineer!At CoreWeave, we are redefining the cloud landscape for AI innovation. Our platform is tailored for trailblazers, offering cutting-edge technology and a collaborative environment designed to empower innovators to construct and expand AI solutions with assuredness. Serving leading AI labs, startups, and global corporations, we blend exceptional infrastructure performance with extensive technical know-how to expedite breakthroughs and transform compute power into actionable capabilities. Since our founding in 2017, we have proudly transitioned to a publicly traded entity (Nasdaq: CRWV) as of March 2025. Discover more at www.coreweave.com.As a Living Wage accredited Employer, we prioritize fair compensation for all our employees.

At Intercom, we're revolutionizing customer service through our advanced AI solutions. Our flagship AI agent, Fin, empowers businesses to deliver exceptional customer experiences, ensuring they're always available to assist users. When combined with our Helpdesk, Fin forms the Intercom Customer Service Suite, a comprehensive solution for addressing complex customer queries that require a personal touch.Since our inception in 2011, we have gained the trust of nearly 30,000 businesses globally, setting the standard for customer service excellence. Our commitment to innovation drives us to push boundaries and deliver unparalleled value to our clients.What’s the opportunity?As a Principal Engineer at Intercom, you'll take the lead in defining and executing key strategic initiatives. This role offers you the autonomy to impact the engineering organization significantly. You'll be responsible for developing both back-end and front-end systems, collaborating closely with designers, product managers, researchers, and data analysts. Additionally, you'll mentor and coach fellow engineers while partnering with Group Engineering Managers on technical strategy and leadership.What will I be doing?In this role, you will:Utilize your domain expertise to lead pivotal projects within our R&D organization.Provide insights on project progress, risks, and challenges to guide resource allocation and prioritization effectively.Contribute to our technical architecture, ensuring our systems scale to meet growing customer demands.Prioritize agility alongside scalability and availability, with a focus on continuous deployment and incremental releases.Engage in all software development phases, including ideation, prototyping, design, and implementation, balancing hands-on development with architectural leadership.Leverage state-of-the-art tools to enhance productivity and streamline problem-solving.

Join Faculty as a Lead Software Engineer where you will spearhead innovative projects and lead a talented team of developers. In this pivotal role, you will be responsible for designing and implementing high-quality software solutions while mentoring junior engineers to enhance their skills and foster a collaborative environment.

We are seeking a Principal Software Engineer specialized in engineering applications to join our dynamic team at physicsx. In this role, you will lead the design and development of innovative software solutions that empower our engineering teams to achieve exceptional results. Your expertise will drive the implementation of cutting-edge technologies and methodologies, ensuring the highest standards of performance and reliability.As a Principal Software Engineer, you will collaborate closely with cross-functional teams, mentor junior engineers, and contribute to the overall technical strategy of our organization. You will have the opportunity to work on challenging projects that have a significant impact on our business and clients.

About UsAt Tracer, we are pioneering the development of autonomous AI agents designed specifically for production data pipelines. As an early-stage, venture-backed startup, we are supported by seasoned professionals and investors who foresee AI's transformative impact on enterprise software over the coming decade. Our tight-knit team is comprised of senior experts who are keenly focused on execution and innovation. About the RoleWe are seeking a Lead AI Software Engineer to join our London team, responsible for creating and managing the core systems that convert production alerts into actionable root cause analyses (RCAs) and corrective suggestions. While the agent handles the heavy lifting, you will ensure that human oversight remains integral to production decisions.In this role, you will serve as the primary technical authority for our systems, collaborating closely with the founders and engaging in hands-on development. You’ll Love Our Tech StackPython + LangGraph (for multi-agentic alert investigation)Rust (to ensure speed and correctness)ClickHouse (to manage high-volume events and investigation histories)AWS + Terraform (for self-building infrastructure)Next.js + TypeScript (for dynamic front-end experiences) What You’ll DoIn this pivotal role, you will oversee the systems that transform alerts into thorough investigations and RCAs. Your responsibilities will include:Designing and building the core alert, investigation, and RCA pipeline using PythonCrafting and implementing essential systems, such as:Alert ingestion and normalizationContext enrichment and correlationProblem framing outputsHypothesis orchestration engineInvestigation execution runtimeInvestigation artifacts and reportingLeading crucial architectural decisions to ensure the system is observable, auditable, and reliable from day oneCollaborating with founders to effectively deploy a select few high-value alert types before gradually expanding our capabilitiesDeveloping customer-ready integrations throughout the pipeline

ifs1 seeks a Lead or Principal DevOps Engineer based in London. This position centers on strengthening infrastructure to help deliver reliable systems and streamline operations. Key responsibilities Build and refine infrastructure solutions that support the team’s goals Design, implement, and maintain continuous integration and delivery pipelines Drive improvements in operational efficiency and system reliability Location This role is located in London.

Join CUBE, a pioneering global RegTech firm that sets the benchmark for regulatory intelligence in the financial services sector. Our innovative SaaS solutions, driven by advanced AI technology, simplify the complexities of compliance for our clients.Why Choose CUBE? CUBE is a globally recognized leader in Regulatory Technology, with our top-tier SaaS offerings trusted by leading financial institutions worldwide. In 2024, CUBE experienced remarkable growth exceeding 50%, fueled by organic expansion and strategic acquisitions. We thrive in a fast-paced, high-performance environment, continually pushing the limits of our products, services, and operations. At CUBE, we don’t just adapt; we lead. Our future is shaped by bold, ambitious individuals eager to make a meaningful impact. Our “make it happen” culture empowers you to take charge of your career and fast-track your personal and professional growth from day one. With over 700 employees in 19 countries across EMEA, the Americas, and APAC, we operate as a cohesive unit with a shared mission to revolutionize regulatory compliance. Diversity, collaboration, and purpose are at the core of our success. We were among the pioneers in leveraging AI for regulatory intelligence and continue to set the standard with our state-of-the-art technology. At CUBE, you will collaborate with some of the brightest minds in AI research and engineering to develop impactful solutions that are transforming the regulatory compliance landscape.Role Overview:As the Lead Software Engineer, you will guide a delivery squad in building and operating C#/.NET web services, Angular front-end applications, and event-driven services on Azure Kubernetes Service (AKS). You will set the technical vision for the squad while managing engineers, engaging hands-on with complex tasks, and ensuring reliable, secure, and sustainable delivery. You will also champion the integration of AI-assisted development tools to enhance engineering productivity and elevate the quality of our deliverables.Purpose:This position is crucial for transforming architectural vision into scalable, high-quality software through strong technical leadership and disciplined execution. It ensures that the squad achieves a balance between delivery speed and long-term maintainability by embedding ownership, engineering standards, and contemporary development practices.

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.

Begin your journey with us and advance your career.We are thrilled to present an opening for an accomplished and innovative Principal Façade Engineer to be part of our expanding and vibrant team. This role is perfect for a forward-thinking leader who excels in providing cutting-edge engineering solutions, fostering the development of talented professionals, and propelling business growth through strategic initiatives.Your role will involve:Leading the execution of a diverse portfolio of national and international projects across multiple sectors, ensuring an optimal balance of quality, feasibility, schedule, and cost.Securing project fees and negotiating contracts of various scales.Building and nurturing strong relationships with clients and referrers, encouraging the exploration of new business opportunities.Representing AECOM at industry events and conferences, highlighting our work and capabilities.Creating compelling proposals and leading successful presentations to win new projects.Mentoring a team of engineers, enabling them to realize their potential and enhance their skills.Overseeing the professional growth of engineers, including performance reviews, chartership, and essential management tasks to support team development.Managing façade team resources to meet technical and workload demands while pursuing personal skill development goals.Participating in R&D efforts to promote sustainable and energy-efficient design solutions.Collaborating with other teams within AECOM to further company-wide initiatives and multidisciplinary project delivery.Join us and grow:At AECOM, we offer a range of benefits tailored to support your well-being and career aspirations, customized to fit your lifestyle. Enjoy opportunities for career development, a flexible hybrid working model to ensure a work-life balance that suits you, access to technical practice networks, AECOM University, and volunteering days.

Join Beamery as a Principal EngineerAt Beamery, we are at the forefront of revolutionizing the HR technology landscape with our cutting-edge transformational AI platform. Our mission is to empower enterprise organizations to make informed and equitable talent decisions. By streamlining recruitment processes, enhancing internal mobility, fostering effective upskilling initiatives, and enabling agile workforce planning, we help our clients successfully manage the hiring and redeployment of over a million individuals each year.We are excited about our future as we deepen our integrations with major platforms such as SAP, Workday, Microsoft, and LinkedIn, enhancing our skills intelligence and allowing our customers to plan more effectively for the future. We leverage proprietary LLMs and knowledge graph technology to broaden talent access, make fairer decisions, and create opportunities at scale. Our company culture, built on trust, empathy, and transparency, ensures that every team member can bring their authentic selves to work.What You'll DoAs a Principal Engineer at Beamery, you'll tackle complex challenges that have significant impact across the organization. Collaborating with fellow engineers, you will help establish the architectural standards necessary for executing Beamery's strategic vision.Design and develop architectural solutions while drafting RFCs for initiatives that affect Engineering and beyond.Maintain your hands-on expertise by assisting teams in delivering scalable and high-performance software.Collaborate with Product and Engineering Directors to plan, scope, and size large-scale projects and features that span multiple teams.Partner with other Principal Engineers to refine and evolve the architectural vision that aligns with Beamery's strategy.

The Trade Desk is a leading global technology firm dedicated to fostering a better, more transparent internet through principled and intelligent advertising solutions. Our platform processes over 1 trillion queries daily, operating at an unparalleled scale. Moreover, we have cultivated a robust and valuable organizational culture centered on trust, ownership, empathy, and collaboration. We celebrate the diverse experiences and perspectives that each individual contributes to The Trade Desk, and we are committed to creating inclusive environments where everyone can express their authentic selves at work. Are you passionate about tackling complex challenges at scale? Do you want to be part of a dynamic, globally connected team where your efforts will significantly contribute to creating a better media ecosystem? Join us and discover why Fortune magazine consistently recognizes The Trade Desk as one of the best small to medium-sized workplaces worldwide. What we do: As Lead Staff Software Engineers, you will take ownership of end-to-end processes, engaging in all facets of designing, developing, and delivering data-centric products for our stakeholders.

Why Join Faculty?Founded in 2014, Faculty believes that artificial intelligence (AI) is poised to be one of the most transformative technologies of our era. Over the years, we have collaborated with more than 350 global clients, helping them enhance their performance through human-centered AI solutions. Discover our impactful projects here.At Faculty, we prioritize genuine innovation over fleeting trends. We focus on developing and implementing responsible AI that truly makes a difference. Our clients range across various sectors, including government, finance, retail, energy, life sciences, and defense, and we possess an unmatched depth of technical, product, and delivery expertise.As our reputation grows, we continuously seek talented individuals who share our intellectual curiosity and are eager to leave a positive legacy through technology.AI is a groundbreaking technology; join us to explore its most powerful applications and help bring them to life.About the TeamWithin our Professional and Financial Services Business unit, we leverage over a decade of Applied AI experience to assist our clients in navigating a fast-evolving landscape. We create and integrate AI solutions that enhance efficiency, improve customer experience, and uncover commercial opportunities in uncertain markets. In a highly regulated industry, we see immense potential for meaningful innovation and are proud to set the standard for combining technical excellence with secure deployment.About the RoleAs a Lead Software Engineer, you will drive the technical direction and execution of complex, innovative AI projects. Acting as a technical authority, you will apply your expertise across various initiatives, from AI strategy formulation to client-side implementations, ensuring that architectural decisions are both robust and reliable. This role requires a blend of profound technical knowledge and strong leadership capabilities, emphasizing innovation, team development, and the creation of reusable solutions across the organization. If you are ready to oversee high-stakes projects and deliver impactful, innovative results, this is your opportunity to shape our future.What You'll Be DoingLeading the technical direction and delivery of sophisticated AI projects.Applying your technical expertise to various projects, ensuring sound architectural decisions.Driving innovation while fostering team growth and collaboration.Building reusable solutions that can be leveraged across the organization.

Join Attio: Pioneering the Future of CRM in the AI EraAt Attio, we are on a transformative journey to innovate CRM solutions tailored for the AI-driven landscape. Our aspiration is to build the first AI-native CRM system, specifically crafted for the most ambitious go-to-market teams. With our recent $52M Series B funding, led by GV (Google Ventures) and supported by key investors like Redpoint, Balderton, Point Nine, and 01A, we are excited to tackle complex technical challenges. Our goal is to not only delight our users but also to set a new industry standard.About the RoleOur engineering team is dedicated to solving the most intricate challenges, ensuring our users have a seamless experience. We are building real-time infrastructure and AI-native architecture, complemented by an effortless frontend, all powered by a fast-moving team that values rigorous thinking and exceptional quality.We seek Engineering Leads who are enthusiastic about creating outstanding teams that push the boundaries of innovation, focus on the finer details, and revolutionize the way millions work. This role involves both hands-on technical contributions and leading a small, specialized group of engineers.

Join MOO, a dynamic company that has been revolutionizing the print industry since 2006. With a growing team of over 400 talented individuals, we strive to create innovative print and digital products for businesses of all sizes, ranging from industry giants like Google and Airbnb to local artisans at craft fairs.Our global headquarters is located in London, UK, and we have additional offices in Dagenham, as well as locations in Boston, MA, East Providence, RI, and Denver, CO in the United States.As we continue to innovate, we are seeking a skilled Principal Engineer to join our Post-Purchase domain, where you will play a key role in integrating physical and digital processes including order orchestration, manufacturing, fulfillment, shipping, and customer support tooling. This is an exciting opportunity to influence our tooling strategy for Customer Support and Operations, enhance data visibility across the order journey, and collaborate with Nexus and Forge teams to build a scalable architecture that supports cross-team delivery.This role is based in our Camden office for 2-3 days a week, with potential travel to Rhode Island, USA to collaborate with our Manufacturing team.

Join Elliptic, where our cutting-edge Investigator tool empowers compliance teams globally to execute investigations with unprecedented speed and efficacy, utilizing the world's most precise crypto identity dataset. Our intuitive forensics visualize fund flows across blockchains at the click of a button, enabling teams to uncover vital evidence swiftly and resolve criminal cases more efficiently. We're seeking a dynamic Engineering Lead to elevate our product and team to new heights.Your Impact:As the Lead of the Investigations team, you will redefine how compliance teams monitor fund movements and combat financial crime. Collaborating closely with product management, you will guide the technical strategy of our platform, transforming complex blockchain data into intuitive and valuable product features.You will mentor and cultivate a high-performing team, instilling a culture of innovation and accountability, while partnering across the organization to provide significant value to our users.Your Responsibilities:Write and review code to support the team, exemplifying best practices, and collaborate with engineers to share insights and tackle complex challenges.Guide your team in making informed technical choices by evaluating trade-offs and selecting strategies that align technical quality with business objectives.Work collaboratively with Product and other stakeholders to ensure the team focuses on the most impactful work.Empower team members to discover their own solutions, enhancing problem-solving skills and fostering a self-sufficient, resilient team.Provide comprehensive system context and overviews to new team members, expediting their onboarding and productivity.Articulate complex technical concepts clearly to engineers, managers, and business stakeholders.Your Qualifications:Leadership Experience: You have successfully led or mentored a small engineering team (approximately 3–6 members) and contributed to their professional growth.Proficiency in JavaScript/TypeScript: Strong skills in backend (Node.js) and frontend (React) development. Experience with frameworks such as NestJS or Redux is an advantage.Architectural Acumen: You have designed scalable UI applications and APIs and are adept at making informed decisions regarding technology choices and architectural patterns.Problem-Solving Mindset: A passion for tackling complex technical challenges and a commitment to continuous improvement.

Join Wayve Technologies as a Principal Application Software Engineer and be part of a pioneering team that is transforming the future of autonomous driving. This role involves leading software application development, collaborating closely with cross-functional teams, and driving innovative solutions to real-world challenges in the automotive industry.The ideal candidate will possess extensive experience in software engineering, a strong understanding of algorithms, and a passion for cutting-edge technology. You will play a critical role in enhancing our software architecture and ensuring the scalability and performance of our applications.