Senior Full Stack Engineer

Role Overview Position: Senior Full Stack Developer (Java/React) with Security Clearance Eligibility Location: London, UK (Hybrid – 1 to 2 days per month in the office) Contract Type: Permanent, Full-time Compensation: £70,000 - £80,000 base salary, plus 10% bonus, 10% equity, and benefits About Appvia Appvia delivers consultancy in cloud, platform, and solu…

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.

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!

Overview Join Tipalti, a dynamic fintech company located in the heart of London, dedicated to automating financial workflows for small and medium-sized businesses. Our engineering culture is robust, collaborative, and focused on making a tangible impact for our clients. As a Senior Full-Stack Engineer, you will merge hands-on engineering skills with a product-oriented mindset. You will define requirements, engage in technical discussions, and influence user experiences while managing the entire software development lifecycle. Responsibilities Develop robust, efficient, and well-tested code across the technology stack. Create new features and enhancements that align with product priorities. Participate in design and architecture discussions, shaping the technical direction. Review code with team members, ensuring clean code practices and quality standards are met. Collaborate closely with Product Managers to clarify requirements and propose solutions. Proactively identify questions, edge cases, and assist in refining specifications. Provide technical insights into prioritization and product decisions. Communicate effectively with designers, engineers, and stakeholders. Share knowledge and mentor colleagues as needed. Engage with external partners and vendors for integration work when necessary. Requirements Experience building across the full stack and a keen interest in learning new technologies. A passion for writing clean, maintainable, secure, and well-tested code. Strong collaboration skills and a preference for team environments. A curiosity about customer needs and the ability to translate them into technical solutions. A commitment to continuous learning and knowledge sharing within the team. Preferred Tech Skills Proficiency in JavaScript / TypeScript, Node.js, and React (or similar frameworks). Experience with REST APIs or microservices architecture. Familiarity with MongoDB. Knowledge of cloud services, particularly AWS. Why Join Tipalti? An open, inclusive, and supportive engineering culture.‍ Opportunities to build products utilized by some of the world’s fastest-growing companies. Equity options in a late-stage scale-up.

Join our dynamic and innovative team at Ratio Recruitment Ltd as a Full Stack Web Developer. In this role, you will utilize your expertise in both front-end and back-end technologies to design, develop, and maintain high-quality web applications. You will collaborate with cross-functional teams to deliver exceptional user experiences while ensuring technical feasibility.

We are seeking an experienced Senior Full Stack Java Developer to join our dynamic team at Version 1. As a key player in our Apps Modernisation & Integration department, you will leverage your expertise in Java development to build robust applications and integrate innovative solutions that meet our clients' needs.Your role will involve collaborating with cross-functional teams, guiding junior developers, and ensuring best practices in software development. You will work with modern technologies and methodologies that enhance our project delivery.

Join Version 1 as a Full Stack Developer and play a pivotal role in shaping innovative web applications. You will work across the entire stack, from building responsive user interfaces to developing robust server-side logic. This is an opportunity to collaborate with a talented team to deliver high-quality software solutions.

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.

Join our dynamic team as a Full Stack Developer, where you'll leverage your exceptional coding abilities in C#, ASP.NET, MVC, Entity Framework, SQL Server, JavaScript, and Angular. Our expanding software company, headquartered in Surrey, is on the lookout for a passionate developer to help elevate our suite of innovative business portals, including a highly anticipated redesign of our globally recognized platform.As a key member of our close-knit development team, you will actively engage in adopting Agile methodologies, contributing across all phases of the product development life cycle. This is a remarkable opportunity to be part of a versatile team that prioritizes high-quality software craftsmanship, collaborative teamwork, and individual growth.

Join Securitas as a Corporate Security Officer, where your primary responsibility will be to maintain the safety and security of our corporate environment. This role requires a dedicated individual with DV Clearance, ensuring the protection of personnel and assets in a dynamic environment.As a key member of our security team, you will utilize your expertise to analyze risks, respond to incidents, and implement security protocols. Your proactive approach will play a crucial role in fortifying our corporate security efforts.

Securitas is hiring a Corporate Security Officer with SC Clearance for a position based in London. The role centers on safeguarding client property and helping ensure a secure environment. A careful, proactive mindset helps in meeting the daily demands of this position. Main responsibilities Monitor building access and verify authorization for all personnel Respond to incidents and report any security concerns without delay Carry out regular patrols and conduct safety checks throughout the premises Assist with emergency procedures as situations arise Requirements Active SC Clearance Background in corporate security or a related field Keen observation and clear communication skills Consistent adherence to procedures and the ability to stay composed in challenging situations

Join our dynamic team at Ratio Recruitment Ltd. as a Full Stack Developer, where you will have the opportunity to work on innovative projects that make a real impact. We are looking for a skilled developer who is proficient in both front-end and back-end technologies, and who is passionate about creating high-quality software solutions. You will collaborate closely with cross-functional teams to design, develop, and implement web applications that enhance user experience.

At Intercom, we are redefining customer service through innovative AI technology. Our mission is to empower businesses to deliver exceptional customer experiences.Our advanced AI agent, Fin, is at the forefront of customer service AI, enabling businesses to provide continuous, high-quality support. When paired with our Helpdesk, it evolves into the Intercom Customer Service Suite, offering enhanced AI support for complex queries that necessitate human intervention.Since our inception in 2011, we have gained the trust of nearly 30,000 businesses worldwide, setting new benchmarks in customer service. Our core values drive us to push boundaries, work with urgency, and create substantial value for our clients.What’s the opportunity?Our website is the heart of our brand—serving as the primary resource for information about Intercom’s products and the leading source of leads for our demand generation team. Intercom.com and Fin.ai are pivotal in bridging awareness, product marketing, demand generation, and customer support, necessitating a robust and reliable infrastructure alongside sleek user-facing interfaces.We are seeking a Senior Full Stack Engineer to join our Team Web. This role is perfect for someone who is eager to create engaging front-end experiences while also developing the backend systems and tools that support them. You will significantly influence the future of our website, engaging with product marketers, designers, and engineers throughout the organization.Explore the team's latest work here.What will I be doing?Designing, building, and maintaining comprehensive web solutions, encompassing modern user interfaces, backend services, APIs, and infrastructure.Collaborating with design, brand, marketing, and content teams to ensure seamless, high-performing experiences across web and mobile platforms.Developing backend logic and APIs, managing data flows, and integrating systems with third-party platforms.Enhancing website performance by implementing best practices in front-end development, such as lazy loading and efficient asset management.Setting up and managing infrastructure using tools like Vercel, AWS, Cloudfront, Terraform, and CI/CD pipelines.

We are seeking a talented Full Stack Developer to join our dynamic team at Vitol, where you will collaborate closely with various business lines. This role presents a unique opportunity to engage with both technical and non-technical experts to create innovative solutions and full-stack applications that are utilized globally across numerous commercial and operational desks. Your contributions will significantly influence decision-making through the development of cutting-edge solutions.In this role, you will play an integral part in transforming our existing application landscape. Your ability to swiftly comprehend business needs, communicate effectively, work autonomously, and rapidly prototype and iterate on new and existing requirements will be essential in delivering state-of-the-art solutions that empower our commercial teams.As a Full Stack Developer at Vitol, you will exemplify:Rapid Prototyping: Collaborate closely with operations and commercial teams to construct and support market-driven business development applications and enhance existing tools by swiftly iterating based on user feedback to create actionable, value-adding solutions.Project Management: Analyze ongoing business and user requirements while independently managing project lifecycles from start to finish within the team.Innovation: Propose innovative and reliable technical solutions that enhance existing processes or uncover new opportunities for the business.Platform Expertise and Integration: Develop a comprehensive understanding of Vitol's Management Information Systems (MIS) platforms and tools, including their functionalities and capabilities, to ensure their success.

At GetGround, we strive to revolutionize property investment, making it safer, quicker, and more accessible for landlords. Our belief in AI's transformative power drives us to enhance the landlord journey, reimagining the entire process of property investing. Our vision is to disrupt the £1.7 trillion UK asset class, creating a future of buy-to-let that is distinctly innovative.We delve into the ideas, predictions, and data trends that will shape this evolving landscape and their implications for landlords and the PropTech industry.Our core values—no BS, pursuit of excellence, feedback obsession, and healthy ego—form the foundation of our culture, inspiring our team to deliver a world-class investment experience for our users.By the Numbers: 85+ GetGrounders (ex Google, Meta, Deliveroo, Startups) £2bn+ of assets under management 30,000+ users across 70 countriesSeries A with a strong runwayYour Role:As a Senior Full Stack Engineer, you will craft innovative solutions in a dynamic environment where technical excellence meets product thinking. Join one of our cross-functional product teams in London, collaborating closely to develop user-facing AI-native products that redefine software development.Our Work Culture:At GetGround, we prioritize AI not just in our products, but also in our coding practices, system reasoning, and professional growth as engineers. We seek Full Stack Engineers who are enthusiastic about collaborating across the technology stack and comfortable utilizing AI tools throughout both the discovery and delivery phases.What Matters to Our Engineers:Commitment to technical excellence, supported by rapid feedback loops and AI-enhanced workflows.Clear and thoughtful communication across code, documentation, and discussions.Eagerness to contribute to a high-performing team culture.

Join Us in Revolutionizing the Fashion Supply Chain!Did you know that the fashion industry generates over 100 billion garments each year, with a staggering 60% ending up in landfills? This occurs not due to a lack of demand but because the current supply chain for secondhand fashion is outdated, manual, and disorganized.At Fleek, we are on a mission to transform this broken system. Our goal is to make secondhand fashion the primary choice, and we are building the infrastructure that will power the global secondhand clothing market. This includes a B2B marketplace and advanced AI systems that will digitize the supply chain.With Fleek, vintage stores, online resellers, and retail buyers can easily source graded secondhand inventory directly from wholesalers and rag houses across various countries. Our innovative tool, FleekSort, utilizes AI to grade, price, and categorize items with just a photo, turning a historically opaque trade into a clear, searchable, and tradable global inventory.Since our inception in 2022, we've successfully diverted 9 million items from landfills and have experienced remarkable growth, tripling in size annually. We have secured approximately $50 million in funding from prestigious investors like a16z, Y Combinator, Burda Principal Investments, and HV Capital. Our advisory board boasts industry leaders from renowned companies such as Depop, Shopify, and Postmates.Today, we cater to thousands of resellers and retailers across the UK, Europe, and the US. As the secondhand fashion market is projected to reach $350 billion by 2027, Fleek is establishing the AI-driven operational and financial backbone for secondhand commerce on a global scale.We are looking for passionate individuals who are eager to create meaningful change and thrive in a fast-paced environment. If this excites you, read on!About the RoleAs a Senior Full Stack Engineer in our product engineering team with a focus on frontend development, you will report directly to our CTO, Sanket Agarwal (formerly of Google and Postmates). You'll collaborate closely with a product manager and designer within a small, senior team dedicated to enhancing user growth and optimizing the core consumer experience.Why This Role is UniqueAt Fleek, we are creating a vibrant, video-first marketplace where each item is one-of-a-kind, supply is unpredictable, and the purchasing experience must cater to both professional resellers making high-volume decisions and first-time buyers venturing into an entirely new market.You will be part of our Growth team, reimagining core user journeys from scratch, enhancing the discovery experience, streamlining the buying flow, and improving seller onboarding.

m-kopa is hiring a Senior Analyst - Credit Risk & Eligibility in London. This position centers on analyzing credit risk and evaluating eligibility for the company’s financial products. Role overview This role focuses on assessing credit risk and supporting the development of credit assessment processes. The Senior Analyst will help refine how eligibility is determined, contributing to improvements that support m-kopa’s goal of expanding access to financial solutions. Key responsibilities Analyze credit risk for a range of financial products. Evaluate eligibility criteria and recommend process enhancements. Support ongoing improvements in credit assessment methods. Impact This work directly supports m-kopa’s mission to provide financial access in underserved markets. The Senior Analyst’s insights will help shape the company’s future approach to credit risk and eligibility.

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/AI Engineer (Backend-leaning)About Us:At AND Digital, we are a forward-thinking tech company committed to enhancing digital delivery and bridging the digital skills gap. Since our inception in 2014, we have partnered with organizations to create exceptional digital products and to strengthen their digital teams.Our mission is to leave a lasting legacy for our clients. We achieve this by fostering close relationships within our regional offices or ‘Clubs’, ensuring that our partners receive priority service from a dedicated local team.This innovative approach has led to significant success for both our clients and ourselves, as demonstrated by our impressive organic growth since 2014. We now boast over 1,300 talented individuals across Clubs throughout the UK and Europe, with ambitious plans for global expansion in the coming years.Join us on our mission to close the world’s digital skills gap!What You Will Contribute:Core Technical Skills:Extensive hands-on experience in backend engineering, proficient in one or more languages such as Java, Node.js, TypeScript, Python, or Go, with the flexibility to work across multiple languages as necessary.Proven track record in designing and implementing scalable, resilient, and maintainable backend systems, including REST/GraphQL APIs, event-driven architectures, and distributed services.Hands-on experience with AWS (including services such as Lambda, ECS, DynamoDB, SQS/SNS, API Gateway, Step Functions, etc.) and a strong grasp of cloud-native patterns. Familiarity with GCP, Azure, or other cloud platforms is a plus.Solid experience in Infrastructure as Code (preferably Terraform), CI/CD pipelines, and modern deployment methodologies.Comfortable working across the entire tech stack, contributing to frontend codebases when required, while maintaining a primary focus on backend and systems engineering.Demonstrates technical leadership by shaping architectural direction, reviewing designs, and exemplifying high-quality engineering practices.A strong foundation in system design, including trade-off analysis, performance considerations, observability, and operational readiness.Able to take ownership of complex technical challenges, make pragmatic decisions, and articulate reasoning effectively to both technical and non-technical stakeholders.AI & Emerging Technologies:Hands-on experience integrating AI into backend systems, such as orchestrating AI services, creating AI-driven workflows, or utilizing AI tools to enhance engineering productivity.Experience in developing AI-enabled systems (including solutions based on LLM or RAG) from MVP or proof-of-concept to production-ready implementations, with an emphasis on reliability, evaluation, security, and maintainability.Ability to discern where AI can meaningfully enhance backend systems (e.g., classification, summarization, anomaly detection) as opposed to traditional algorithms.