Senior Full Stack Software Engineer

Join our innovative team at Faculty as a Senior Full Stack Software Engineer. In this pivotal role, you will leverage cutting-edge technologies to design and implement robust software solutions, driving our mission to harness AI for impactful outcomes. Collaborating with cross-functional teams, you will address complex challenges and deliver high-quality products that meet user needs.If you are passionate about technology, enjoy problem-solving, and thrive in a dynamic environment, we want to hear from you!

Who Are We? At Ki Insurance, our influence can be seen in various groundbreaking headlines. From insuring space shuttles to world tours, wind farms, and even the legs of footballers, our impact is substantial.Our mission aims to digitally disrupt and transform a 335-year-old industry. Collaborating with Google and UCL, we have developed a platform that leverages algorithms, machine learning, and large language models, enabling insurance brokers to receive quotes in mere seconds rather than days.As the largest global algorithmic insurance carrier, Ki is the fastest-growing syndicate within the Lloyd's of London market, achieving a remarkable $100 million in profit within just three years.Our teams consist of diverse talents working in an agile, cross-functional environment, dedicated to delivering the best possible experience for our customers. With ambitious goals ahead, we seek exceptional minds to challenge the status quo and help us explore new heights.Your Role:As a Senior Full Stack Engineer, you'll be an integral part of our development team, contributing to our broker platform, which is vital to Ki's success. Our multi-disciplinary team combines expertise in software and data engineering, full stack development, platform operations, algorithm research, and data science. We focus on delivering impactful features through an iterative and analytical approach.Your Responsibilities: Develop robust and scalable software for critical web-based applications.Create visually appealing, functional, and efficient web and mobile sites that enhance these applications.Design, build, test, document, and maintain APIs and integrations.Implement quality control through industry-standard practices such as automated testing, pair programming, and code reviews.Collaborate with the Product team to translate end-user requirements into effective technical solutions.Document technical designs and analyses.Evaluate current system architecture for growth and improvement opportunities.Construct mock-ups or prototypes for exploring and troubleshooting new initiatives.Engage with the Product team and UX designers to review designs, implement new features, and ensure an exceptional user experience.Investigate new ideas and emerging technologies, rapidly developing prototypes.Promote and enhance the engineering team’s principles and methodologies.Act as a domain expert for Ki’s core technologies.Mentor and coach colleagues in engineering and business aspects.

Become Our Foundational Engineering Leader at Civic Marketplace!Are you driven by the potential of technology to foster significant change within communities? At Civic Marketplace, we are innovating the process by which local governments acquire and provide essential services, crafting the most user-friendly and effective procurement platform for the future.Why Choose Civic Marketplace?We are a mission-oriented startup dedicated to reshaping the operational landscape for local governments—eliminating obstacles, streamlining workflows, and ultimately enhancing outcomes for citizens. If you thrive in a startup environment and wish to join a purpose-driven team effecting genuine change, this role is tailored for you.Who We’re Seeking:We are in search of our inaugural engineering hire—a proactive technical leader prepared to take full ownership of our technology landscape. You will spearhead our technical vision, enhance our codebase, and assemble a high-performing team to achieve our ambitious objectives. You will be a pivotal figure in our expanding organization, with the autonomy to define our technological strategy and architecture.Key Responsibilities:Lead the execution of our full-stack development initiatives, ensuring seamless ownership of code from inception to deployment. You will be our full-time lead engineer, collaborating with teams to facilitate execution through the establishment of effective processes, setting clear expectations, managing risks, resource allocation, and removing impediments.Craft a quality assurance playbook for your teams, establishing standards for code reviews, pull requests, testing, and monitoring. You will actively contribute to coding while also delegating tasks and hiring talent as necessary, including working with freelancers.Demonstrate proficiency in REACT, marketplace dynamics, payment infrastructure, and hybrid development approaches utilizing both custom and no-code/low-code solutions.Ensure your team manages the operation of data, systems, and applications in production, driving the resolution of critical issues through root cause analysis.Foster hiring, motivation, and professional growth among team members by developing a deep understanding of their motivations, strengths, and growth opportunities. Align personal growth opportunities with organizational impact.

Flatiron Health is hiring a Senior Full Stack Software Engineer for its London office. This role centers on building data-driven tools and products that support better cancer care. The team’s mission is to improve and extend lives by drawing insights from the experiences of people affected by cancer. About Flatiron Health Flatiron Health works with cancer centers across the US, Europe, and Asia, transforming real-world patient data into evidence that can inform care and research. Teams include oncologists, data scientists, software engineers, epidemiologists, and product specialists, all collaborating to advance oncology. What You’ll Do Design and build technology solutions with engineering teams based in the US, UK, Germany, and Japan. Work closely with oncologists, clinicians, product leaders, and quantitative scientists to solve technical and business challenges. Help shape team roadmaps and contribute to ongoing technical improvements. Support the growth and culture of Flatiron’s European engineering teams. Develop creative approaches to complex problems in healthcare technology. Iterate quickly on products while following engineering best practices for quality and security. Work with complex data pipelines and a range of data processing tools. Bring or build deep knowledge of the UK healthcare landscape, especially around data sources, security, privacy, and new trends. Who We’re Looking For Full Stack Software Engineer with 4-8 years of relevant experience. Comfortable working in a fast-moving setting and able to think creatively and adapt quickly. Interested in a technology-driven culture that values innovation and measurable business impact. Experienced in agile development and object-oriented programming languages such as Python, Java, C#, or SQL, and open to learning new technologies. Knowledge of healthcare systems, especially in the UK, is a plus. This role offers the chance to work alongside experts from multiple disciplines and make a meaningful contribution to cancer care through technology.

Role overview Legal & General is seeking a Senior Full Stack Software Engineer based in London. This position centers on crafting and delivering software solutions tailored to a range of client requirements. The role combines hands-on coding with close teamwork alongside colleagues from various backgrounds. What you will do Design and build software systems, working on both front-end and back-end components Work with cross-functional teams to create dependable products Guide and mentor junior developers, sharing technical knowledge within the group Support and improve software development best practices

Senior Full-Stack Software EngineerJoin Deliveroo on our exciting journey to revolutionize shopping and dining experiences, where innovation, impact, and growth are at the forefront of our mission. Our Engineering teams face intricate technical challenges in a vibrant, global marketplace, crafting and optimizing systems that cater to millions of customers, riders, and partners every day.From real-time logistics to robust infrastructure and marketplace optimization, we engineer technology that fuels Deliveroo’s expansive growth.We are seeking a Senior Full-Stack Software Engineer to become a vital part of our London team. In this role, you will be instrumental in building and scaling high-performance features across our entire technology stack, ensuring an exceptional experience for our customers, partners, and riders.Discover more about our Engineering team — our motivations, work culture, and what you can expect from us.

About UsAt Humaans, we are pioneering the future of workplace infrastructure, developing innovative software solutions for rapidly growing companies that operate on a global scale and are venturing into new territories.What initially began as a basic record-keeping system has transformed into a comprehensive platform designed to manage personnel across the globe. Our agentic AI layer, Athena, enhances our capabilities, enabling intelligent orchestration that connects workflows across HR, IT, Finance, and Operations. This empowers organizations to act promptly and confidently, revolutionizing traditional work methodologies.We collaborate with forward-thinking teams across Europe and the US, ranging from AI-driven firms like Lovable, Poolside, Fyxer AI, and Tandem Health to established high-growth companies scaling through international expansion and acquisitions, including Quantexa, Sellpy, Manychat, Gigs, Croud, and Threecolts. These teams are not just purchasing software for its features; they seek leverage—the ability to operate efficiently and effectively as complexities grow.We are proud to have secured $20 million in venture funding from some of the most esteemed entrepreneurs and investors in the technology sector, including Lachy Groom (Physical Intelligence), Stewart Butterfield (Slack), Tobias Lütke (Shopify), Dylan Field (Figma), Jeff Weiner (LinkedIn), Claire Johnson (Stripe), Oliver Jay (OpenAI), Jay Simmons (Bond), alongside Y Combinator, Moonfire, Frontline Ventures, Pathlight Ventures, and Exor.If you possess a strong ambition and are eager to tackle challenging problems with a nimble team during a pivotal moment in our industry, we invite you to join us.Our Technology StackOur current technology stack includes TypeScript, JavaScript, React, Node, Postgres, and Redis. We utilize GitHub for version control and continuous integration, deploying our services on Kubernetes within the Google Cloud Platform. We offer a public REST API, and our web client employs a real-time WebSocket API. We focus on delivering quality user-facing features and their implementation while maintaining a rapid development pace through concentrated efforts and robust foundational tools.Your ResponsibilitiesContribute to shaping the product from concept to launch.Develop end-to-end features, resolve bugs, enhance infrastructure, and provide customer support.Write backend TypeScript using Node, Postgres, Redis, and Kubernetes.Implement frontend TypeScript in React.Expand our third-party integration marketplace.Participate in technical architecture planning.Assist the sales and marketing teams.

Join Scopely as a Senior Full-Stack Software Engineer and be part of our innovative Monopoly GO! game team, working remotely from the UK or Portugal. Our diverse team comprises talented individuals from the UK, Spain, Portugal, and the US, all dedicated to creating engaging gaming experiences. At Scopely, we are passionate about our mission to inspire play every day, both in our collaborative work environment and through our connections with our global community of players. We pride ourselves on being a worldwide team of game enthusiasts who are at the forefront of the mobile gaming industry, connecting millions of users daily. Monopoly GO! is one of our flagship casual games, boasting a player base of over 10 million daily active users. Our European and US-based team collaborates daily to deliver captivating experiences for our players. The Team: We are expanding our cross-functional team focused on game integrity. In this role, you will collaborate with cybersecurity experts, data engineers, product managers, and technical leadership to ensure that our game remains safe and fair for everyone. Our Tech Stack: Unity mobile game with a .NET/C# back-end Extensive use of AWS infrastructure (EC2, Memcache, Dynamo, Redis, ElasticSearch, etc.) CI/CD pipeline utilizing GitHub Actions, Bamboo, Spinnaker, and more Monitoring with tools such as Datadog, Bugsnag, Kibana (OpenSearch), and AWS console

About the Role Abound is hiring a Senior Full Stack Engineer in London. This position focuses on building and improving web applications, working across both front-end and back-end systems. The team values practical solutions and a collaborative approach. What You Will Do Design and implement scalable web applications Work with cross-functional teams to deliver new features Contribute to both front-end and back-end development Help create a strong user experience through thoughtful engineering What We’re Looking For Solid experience with both front-end and back-end technologies Comfort working closely with colleagues from different disciplines Ability to deliver reliable, maintainable code

Join our dynamic team at Faculty as a Full Stack Software Engineer. In this role, you will have the opportunity to work on both the front-end and back-end of our innovative software solutions. You will collaborate with cross-functional teams to design, develop, and maintain applications that enhance our clients' experiences. Your expertise in various programming languages and frameworks will be essential in driving our projects forward.

Yext (NYSE: YEXT) is at the forefront of brand visibility, crafting an ecosystem where discovery and engagement transcend boundaries—spanning AI search, traditional search, social media, websites, and direct communications. With a robust foundation of over 2 billion trusted data points and a comprehensive suite of solutions, Yext empowers brands with clarity, control, and confidence to thrive across digital platforms. Our innovative culture, recognized globally as a 'Best Place to Work' by esteemed organizations such as Built In, Fortune, and Great Place to Work®, invites you to be a part of a team that transforms digital presence into a competitive advantage.The Yext Services team collaborates closely with our largest clients to provide tailored, integrated solutions. Comprising Project Management, Creative, and Development professionals, we excel in addressing diverse challenges and adapting to the evolving needs of our clients. We are currently seeking a Full Stack Software Engineer to develop custom web and backend solutions for our enterprise clientele. Our Agile development environment features one-week sprints, peer code reviews, and individual project ownership from inception to delivery, allowing you to engage with code from day one alongside engineers from prestigious universities and leading tech companies.

Full-Stack Software Engineer at AmebaJoin Ameba as a Full-Stack Software Engineer and be part of a transformative journey in the supply chain industry. At Ameba, you will have the unique chance to develop innovative software solutions that shape the way products move from raw materials to finished goods. If you're intrigued by the behind-the-scenes mechanics of the world, we want to hear from you!We are a dynamic startup led by seasoned entrepreneurs who have collectively raised over $160 million and come from top-tier companies like Meta, Palantir, and Microsoft. With ambitious goals and strong backing from prestigious investors in Europe, we have secured more than $9 million since our inception just over a year ago.Your Role as a Full-Stack EngineerIn this pivotal role, you will partner closely with our CTO and engineering team to conceptualize, develop, and launch products. You will engage with various technologies across the stack, including front-end development with React and TypeScript, back-end services powered by Kotlin and Python, and machine learning initiatives. Our fast-paced startup environment allows features to go from concept to user-ready in just a week, so you should be comfortable with rapid iterations and eager to create products that resonate with users. Don't worry if you lack experience in certain areas—your enthusiasm and willingness to learn are what matter most!Life at AmebaWe are committed to providing competitive salaries and substantial equity packages to all team members. Our focus is on building a streamlined team of highly skilled individuals, ensuring that we reward them generously.We value collaboration and prefer in-office work five days a week for effective communication, while still offering flexibility for remote work when needed. Our priority is establishing a robust office-first culture at this stage.Enjoy 28 vacation days annually, along with a complete two-week shutdown during the holiday season for everyone to recharge.We offer four months of parental leave at full salary for both maternity and paternity.Our healthcare benefits include comprehensive medical and dental coverage.The salary for this role ranges from £80,000 to £130,000 plus generous equity options.

Skin + Me is a pioneering technology start-up dedicated to transforming personalized skincare solutions. We have successfully delivered millions of treatments through our diverse multi-brand ecosystem, which includes Skin + Me, Hair + Me, and Renew + Me. Our proprietary technology stack supports everything from our e-commerce platform to in-house manufacturing processes.As we enter an exciting new growth phase, we are seeking a Senior Full Stack Software Engineer to join our dynamic and high-impact team. We leverage cutting-edge tools like Claude Code and Cursor to enhance our modern, fast-paced workflows.Our MissionAt Skin + Me, we prioritize tangible results over mere hours logged. Your objective will be to utilize advanced tools to streamline mundane tasks, allowing you to focus on tackling complex challenges related to scalability, experimentation, and architecture.Your ResponsibilitiesAgentic Workflows: Employ agentic tools to plan, refactor, and deploy features throughout our Python/React stack, significantly enhancing your technical capabilities.Full-Stack Ownership: Architect and implement comprehensive features, managing everything from backend logic and database designs to contemporary frontend user experiences.Drive Engineering Advancement: Contribute to shaping our AI-native development standards and guide the team towards high-velocity delivery practices.Who You AreAI Proficiency: You are adept in utilizing agentic AI, capable of managing edits across multiple files and discerning any inaccuracies from language model outputs.Pragmatic Architect: With your senior experience, you know when to rely on automated tools and when to intervene personally. You appreciate clean code, robust type systems, and comprehensive testing.High Agency: You are a proactive problem-solver who flourishes in a fast-paced, self-directed environment.Technical Skills RequiredExpertise in Python and associated web development frameworks, such as Flask and Django.Experience with relational databases (MySQL preferred) and ORM frameworks (e.g., SQLAlchemy, Alembic).Proficient in TypeScript and React.Experience in building and maintaining frontend design systems.Familiarity with containerization (Docker) and cloud platforms (preferably AWS).Understanding of modern web architecture and performance optimization techniques.Why Join Skin + Me?High Leverage: We equip you with the best tools and the freedom to utilize them effectively.Make a Difference: Be part of a revolutionary company dedicated to enhancing millions of lives.Equity: Every team member has a stake in our success.Perks: Enjoy free breakfast and lunch on office days, a dog-friendly workplace, 25 days of holiday, and an annual £500 development budget.

Full Stack Software EngineerLocation: London (Remote)About SwapAt Swap, we are revolutionizing the future of commerce with our AI-native platform that seamlessly integrates backend operations with a cutting-edge storefront experience. Our innovative solutions empower brands to sell products globally, streamline operations, and make informed decisions with real-time data analytics.Our comprehensive product offerings include cross-border solutions, tax management, returns logistics, and demand planning, enabling merchants to operate with full transparency and confidence.Join us as we cultivate a culture driven by clarity, creativity, and shared ownership, redefining the landscape of global commerce.Role OverviewWe are seeking a passionate Full Stack Software Engineer to become a vital part of our expanding engineering team during an exciting period of rapid growth. You will play a key role in shaping the future of our products, building them from the ground up. The ideal candidate will have a strong enthusiasm for crafting elegant software solutions and will stay updated with the latest development tools and libraries, ensuring the best choices are made for each task. Our engineers are expected to contribute across the entire product stack and maintain the integrity of our codebase while collaborating closely with product managers, designers, and other teams.Key ResponsibilitiesDeveloping scalable, robust, and maintainable code that meets performance standards.Translating software requirements into high-performance applications.Participating in architectural and design decisions to promote efficient structures.Creating design documentation and project estimates.Developing unit tests to ensure code quality.Utilizing AWS for application deployment, monitoring, and scaling.Collaborating with cross-functional teams to gather technical requirements and translate them into actionable tasks.QualificationsProven experience as a Full Stack Engineer.Strong proficiency in modern web frameworks and languages.Experience with cloud services, particularly AWS.Ability to work collaboratively in a team environment.Excellent problem-solving skills and attention to detail.

About Neo4j:Neo4j is the leading graph intelligence platform that turns data into actionable insights, enabling the development of the next generation of intelligent applications and AI systems. Our platform boasts enterprise-ready knowledge graphs that are accurate, explainable, and governed for AI; comprehensive and trusted graph capabilities that are easy to deploy across various environments and data sources; and an unparalleled ecosystem that is trusted by 84 of the Fortune 100 companies and backed by the largest graph community in the world. Experience intelligence that truly works and produces significant results.Designed for seamless integration across all clouds, our technology facilitates dynamic, personalized, and autonomous AI systems, delivering rapid insights, contextual knowledge, and solutions that enhance the experience for both customers and employees.Our Vision:At Neo4j, we are committed to helping the world make sense of data. As the realms of business, society, and knowledge become more interconnected, our technology fosters innovation by enabling organizations to discover and comprehend data relationships. We are pioneers in the graph database category, revolutionizing how businesses utilize their data to drive innovation and maintain a competitive edge.The Team:Our team is responsible for the core user experience of managing Neo4j database instances on the Aura cloud platform and serves as a foundation for other teams to build tooling upon. We manage everything from internal APIs and customer support tools to maintaining build and deployment pipelines. Join us in this strategically significant role, where you will develop features utilized by some of the largest enterprises worldwide.We are in search of full-stack engineers who are proficient in back-end technologies, yet comfortable working on the front-end as well. Key server-side experience includes designing and developing HTTP APIs, implementing data persistence logic, managing async and event-based processing, and integrating with third-party services.The Role:As a Software Engineer on the Aura Instances team, you will play a pivotal role in building crucial components...

Join Faculty as a Full Stack Software Engineer and be part of a dynamic team that is pushing the boundaries of technology. We are looking for an innovative and driven individual who thrives in a fast-paced environment and is passionate about building scalable applications.As a Full Stack Software Engineer, you will work on both front-end and back-end development, collaborating closely with cross-functional teams to deliver high-quality software solutions that meet our clients' needs.

About Baringa Baringa Partners LLP is a global consulting firm working with industry leaders to deliver meaningful change and long-term value. With more than 2,000 professionals across the UK, Europe, North America, Asia, and Australia, Baringa combines international perspective with local knowledge. The team brings expertise across sectors such as energy and resources, financial services, government, consumer products, retail, pharmaceuticals, life sciences, manufacturing, technology, media, and telecoms. Baringa’s services cover strategy, transformation, and operational improvement, all supported by advanced technology, data, AI, and digital innovation. Clients value Baringa’s collaborative style and the way teams integrate to focus on what matters most. The firm is known for its thoughtful, curious experts who help clients navigate energy transitions, modernize financial platforms, expand digital networks, enable digital government services, and drive growth in consumer sectors. Baringa is recognized as a Great Place to Work worldwide. The Financial Times has named Baringa among the UK Leading Management Consultants in 22 categories, and Forbes has listed the firm as one of the World’s Best Management Consulting Firms for four years running. Role Overview: Senior Full Stack Software Engineer The Solutions & AI Labs (SAIL) team at Baringa is seeking a Senior Full Stack Software Engineer in London. SAIL helps clients manage data, turn it into actionable insights, and apply machine learning within business processes. The team delivers support across multiple industries, with deep experience in AI, ML, cloud technologies, and managed solutions.

Join Trainline as a Full Stack Engineer and contribute to the evolution of digital travel. In this role, you will design and implement scalable web applications that enhance user experiences. Collaborate closely with product managers and designers to shape innovative features that meet customer needs.

Join our dynamic Platform Performance team as a Full-Stack Software Engineer with 2–4 years of experience, and help us create fast, scalable solutions for millions of users globally.In this role, you will engage in all aspects of the software stack—enhancing frontend performance, optimizing backend services, and improving the responsiveness, reliability, and overall user experience of our interfaces. You will collaborate with a dedicated team of engineers and product managers to identify performance bottlenecks, contribute to architectural enhancements, and help advance our design system.This position is a fantastic opportunity for a driven engineer who is eager to expand their skillset in a fast-paced environment and make a significant impact at scale.Freelancer.com is the largest freelancing and crowdsourcing platform in the world, connecting over 80 million users across 247 countries and territories. Our platform empowers businesses, entrepreneurs, and individuals to collaborate with skilled professionals globally, turning ideas into reality more efficiently than ever.Our ambitious mission is to create one billion jobs worldwide by enabling people to work for themselves and build sustainable online careers. Every feature we develop and every performance enhancement we implement brings us closer to realizing this unprecedented opportunity.