1 to 25 of 27 Senior Full-Stack Engineer Jobs

Senior Full-Stack Engineer London AI Start-up Up to £120,000 + Shares + Private Healthcare + Pension Were working with a well-funded AI start-up in London thats gearing up for huge growth. Theyre expecting to scale 10x over the next 18 months. Theyre now looking for a Senior Full-Stack Engineer to help design and build the next generation of their AI-driven platform. Reporting directly into the CTO and collaborating closely with product and research teams, this is a unique chance to take ownership across the stack and make a lasting impact in a company at the … big plus. The role is full-time, 3/4 days a week in their London office. What theyre looking for Strong experience as a Full-Stack Engineer across React, Next.js, Node.js, and Python. Solid knowledge of SQL databases and data modelling. Hands-on experience with cloud platforms (AWS or GCP). More ❯

R ole: Senior Software Engineer - Full-Stack Location: London Working Model: Hybrid 3 Days Salary: – Up to £128,000 Ready to build tech that actually means something? This team is powering the next generation of electrification — EVs, solar, batteries, heat pumps, smart devices — all connected through a platform that’s scaling fast … and rewriting the rulebook in green-energy tech. They’re growing. They’re hiring. And they want a Senior Engineer who can own problems end-to-end, think like a product person, and ship like someone who knows their craft inside out. If you want a job where you just “pick up tickets”, this isn’t … Product Engineer. Therefore, if you want ownership, modern tech, and work that actually matters? This one’s worth a serious look. Why This Role Rocks You work full-stack: TypeScript, Node, React, React Native (bonus). You ship features end-to-end — design → build → deploy → monitor. You join a proper engineering culture: smart people, no ego More ❯

Senior Full-Stack JavaScript Engineer (Frontend SDK Focus) WalletConnect is the de facto web3 communications protocol enabling interoperability between wallets and dapps across blockchains. What began as a single API now facilitates millions of messages and secure connections every month, powering the backbone of the decentralized web. Today, we're expanding our … Labs. Founded in 2018 by Pedro Gomes, we're a global, remote-first company that values openness, simplicity, ownership, and impact. The Role We're looking for a Senior Full-Stack JavaScript Engineer (Frontend SDK Focus) to join our Web team, reporting to Luka (Web Team Lead). You'll take ownership … time improvements. Collaborate cross-functionally, writing technical design docs and reviewing peers' work to maintain high engineering standards. Requirements Must Have 5+ years of experience as a Full-Stack or Frontend Engineer building production-grade applications and/or SDKs. Strong expertise with TypeScript, , and Proven experience designing, maintaining, and publishing frontend SDKs/ More ❯

Senior Software Engineer (Back-end focus) AI start-up in Rotterdam At Passionfruit, we help food suppliers become the partner their customers want to work with. In the food industry, trust depends on how well information moves between companies. We build the system that improves that flow, making it faster, more accurate, and easier to manage. … We're scaling quickly and looking for a senior engineer to help us scale faster. The challenge Food suppliers handle thousands of requests each year from customers, auditors, and retailers. These requests ask how products are made, where they come from, and whether they meet food safety or sustainability standards. Responding quickly and accurately is essential … Proficiency in at least one modern programming language (e.g., TypeScript). Hands-on experience building and maintaining backend services, APIs, or microservices. Skilled in building and shipping full-stack products (React/Next.js + Node.js or similar) Strong preference for simplicity able to reduce complexity and write clear, minimal, high-impact code. Curious about AI and More ❯

R ole: Senior Software Engineer - Full-Stack Location: London Working Model: Hybrid 3 Days Salary: Up to £128,000 Ready to build tech that actually means something? This team is powering the next generation of electrification EVs, solar, batteries, heat pumps, smart devices all connected through a platform thats scaling fast and … rewriting the rulebook in green-energy tech. Theyre growing. Theyre hiring. And they want a Senior Engineer who can own problems end-to-end, think like a product person, and ship like someone who knows their craft inside out. If you want a job where you just pick up tickets, this isnt it. Im looking for … fledged Product Engineer. Therefore, if you want ownership, modern tech, and work that actually matters? This ones worth a serious look. Why This Role Rocks You work full-stack: TypeScript, Node, React, React Native (bonus). You ship features end-to-end design ? build ? deploy ? monitor. You join a proper engineering culture: smart people, no ego More ❯

on large-scale projects and help the team grow in their roles. What you'll bring to the table: Proven development experience of working as a Lead/Senior Engineer in a commercial development team with an expert understanding of some or all of: JavaScript, Typescript, React, Angular, Vue,js, Node, HTML/CSS, dotnet, Java … with the challenges from stakeholders that come with this. Experience of implementing architecture, DevOps, performance or security and an understanding and ownership of best practice as a Lead Engineer (eg. TDD, SOLID, XP) Comfortable mentoring junior engineers and supporting Squad Leads, to provide technical guidance as the most senior engineer on a project and More ❯

Senior Full Stack Engineer We are seeking a talented Senior Full Stack Software Engineer to join a leading global investment management firm in London. Paying up to 120k plus bonus per annum, you will contribute to the development, optimisation, and design of front-office … applications, collaborating with portfolio managers and product owners to create innovative and high-performance solutions. As a Senior Full Stack Software Engineer, you will play a key role in developing and delivering critical investment management tools and systems. Your expertise will be essential in ensuring the optimal performance of the firm's More ❯

Senior Full Stack Engineer Are you a pragmatic, innovative, and self-motivated problem solver with a passion for building scalable, high-performing software? We're looking for a Senior Full Stack Engineer to join a high-performing product team working on a global, high … performance to ensure fast, seamless user experiences Contribute to continuous improvement efforts, introducing new ideas and technologies What You'll Bring Proven experience as a Full Stack Engineer or similar role Expertise in React, JavaScript/TypeScript, HTML, CSS , and responsive design principles Strong understanding of Back End technologies and best practices Passion for More ❯

Senior Full Stack Engineer Are you a pragmatic, innovative, and self-motivated problem solver with a passion for building scalable, high-performing software? We're looking for a Senior Full Stack Engineer to join a high-performing product team working on a global, high … performance to ensure fast, seamless user experiences Contribute to continuous improvement efforts, introducing new ideas and technologies What You'll Bring Proven experience as a Full Stack Engineer or similar role Expertise in React, JavaScript/TypeScript, HTML, CSS , and responsive design principles Strong understanding of Back End technologies and best practices Passion for More ❯

Senior Full Stack Engineer Are you a pragmatic, innovative, and self-motivated problem solver with a passion for building scalable, high-performing software? We're looking for a Senior Full Stack Engineer to join a high-performing product team working on a global, high … performance to ensure fast, seamless user experiences Contribute to continuous improvement efforts, introducing new ideas and technologies What You'll Bring Proven experience as a Full Stack Engineer or similar role Expertise in React, JavaScript/TypeScript, HTML, CSS , and responsive design principles Strong understanding of Back End technologies and best practices Passion for More ❯

Role: Senior Full Stack Engineer Working Model: Permanent Location: Remote Salary: Up to £85,000 Are you a passionate full-stack engineer who thrives in high-growth, fast-paced environments? Do you love building across both frontend and backend systems, solving complex engineering challenges, and shaping … ll play a key role in elevating product performance, solving deep engineering challenges, and driving improvements across standards, processes, and tooling. Key Responsibilities Build, enhance, and maintain full-stack features across backend and frontend systems. Translate product and UX requirements into reliable, scalable, high-performance code. Collaborate cross-functionally to deliver polished, seamless product experiences. Solve … problems related to scalability, performance, and developer experience. Elevate engineering processes, standards, and tooling across the team. Essential Skills & Experience Ideally, you will bring 5+ years of full-stack development experience , including: Experience building enterprise SaaS products, ideally within cybersecurity (Threat Intelligence or Offensive Security a plus). Strong backend engineering skills with TypeScript and NestJS More ❯

Job Title: Senior Engineer with Node.js and Python or Back End (Java and ideally Kafka) Max rate: £537/Day on Umbrella Location: Croydon (Hybrid) Clearance required: SC Transfer (Active SC only ) Contract Duration: 05 months Experience of Java Experience of Spring framework or equivalent. Knowledge of software design patterns and when to apply them Excellent More ❯

their operations and make strategic, data-driven decisions. This is a unique opportunity to shape both the technical foundation and crew culture from the ground up. As a Senior Engineer, your mission is to: Drive Product Excellence : Develop features and solutions that directly align with our strategic business goals and deliver real value to our customers. … or CSS-in-JS solutions. Backend Proficiency : Solid experience with server-side technologies such as Scala, Java, , or Python, and expertise in building and consuming RESTful APIs. Full-Stack Integration : Experience bridging frontend and backend systems, including API design, data flow optimisation, and end-to-end feature development. Strong foundation in unit testing, clean code practices More ❯

our customer base and collection of spaces span across the world. Job Description We are looking for a Senior Front-End Engineer (or Full-Stack with strong frontend skills) whose primary responsibility is to further build our web app and mobile apps. This role is key to delivering ONDA''s product to More ❯

Methods Analytics (MA) is recruiting for a Mid/Senior Software Engineer (Full Stack) to join our team a permanent basis. This role will be mainly remote but require flexibility to travel to client sites, and our offices based in London, Sheffield, and Bristol. Salary: £40k to £80k What You'll Be … Doing as a Software Engineer: Lead technical aspects of full stack development projects and mentor junior engineers Design and build scalable web applications using modern frontend and backend technologies Develop responsive user interfaces and robust REST APIs Design and maintain database schemas, queries, and optimise performance Implement comprehensive testing strategies and CI/CD More ❯

Senior Full Stack Engineer/Developer (TypeScript Elixir AWS) London/Hybrid Up to £100k + Equity Join a fast-growing energy trading data scale-up as a Senior Full Stack Engineer, working on complex greenfield systems that demand scalability, reliability and clean architecture. More ❯

EIT Oxford fosters a culture of collaboration, innovation, and resilience, valuing diverse expertise to drive sustainable solutions to humanity's enduring challenges. We are seeking to recruit a Senior Full Stack Software Engineer to help design, build, and maintain user-facing components of our scalable, high-performance data platform supporting our bioinformaticians More ❯

UK Remote Salary: £65 000 - £75 000 Sector: Full Stack Developer Type: Permanent We’re looking for a Senior Full Stack Engineer to help shape and deliver innovative features for SaaS platforms. You’ll work across the stack, contributing to both front-end and back-end … development, ensuring a seamless user experience while maintaining technical excellence. This role involves close collaboration with Delivery Managers, Product Managers, and other Senior Engineers, as well as providing technical leadership to ensure high-quality, scalable solutions. Key Responsibilities: Deliver high-quality features for SaaS products, working across both front-end and back-end technologies. Provide technical leadership and … support team members to deliver dependable estimates and evolve best practices. Collaborate with senior stakeholders to refine and execute the technical roadmap. Contribute to building a strong developer community by sharing knowledge and driving best practices. Actively participate in sprint planning and execution. Document technical approaches with a focus on testing, CI/CD, and scalability. Key Requirements More ❯

Join a leading global bank as a Full-Stack Engineer within their front office team. You'll help drive a multi-year transformation of their Fixed Income technology platform, building … high-performance, real-time applications that support trading workflows. Key Responsibilities Design and develop real-time, high-performance microservices to support Rates and Credit trading workflows Deliver full-stack solutions across Java, React, and TypeScript Collaborate with business stakeholders to understand trading needs and deliver impactful features Contribute to the design of scalable, event-driven, microservices More ❯

Qualifications Bachelor's or Master's degree in Computer Science or similar (PhDs will be given preference) 7+ years of experience in full-stack development; from UI to backend systems Full proficiency in Angular.JS and/or Angular 2+ (Angular 17) Full proficiency in Node.JS and JavaScript ES6+; Experience with NestJS is … all areas, including information retrieval, distributed computing, large-scale system design, networking and data storage, security, artificial intelligence, natural language processing, UI design and mobile. As a software engineer, you will work on a specific project critical to the Scopeworker platform with opportunities to switch teams and projects as you and … our fast-paced business grow and evolve. We need our engineers to be versatile, display leadership qualities and be enthusiastic to take on new problems across the full-stack as we continue to push technology forward. With your technical expertise you will manage project priorities, deadlines, and deliverables. You will design, develop, test, deploy, maintain, and More ❯

Senior Full Stack IAM Engineer OAuth2, AWS IAM/Okta, React, Node.js, C# Join a global B2B SaaS leader as a Senior Full Stack IAM Engineer, driving secure, scalable identity and access management across multiple products. This permanent role offers the chance to shape … and authorization services in a cutting-edge, AI-driven environment. About the Role: Own the IAM platform, designing and operating OIDC-compliant IDPs (Auth0, Okta, Cognito) Build full-stack features in TypeScript, Node.js, React, and C#/.NET Deliver secure login, SSO, MFA, RBAC/ABAC, and tenant isolation at scale, leveraging AWS services (Lambda, IAM … Collaborate across Product, Security, and Engineering teams, embed identity into new features, and uphold engineering excellence through CI/CD, testing, and incident response Required experience: Strong full-stack skills (TypeScript/Node.js, React, C#/.NET) Proven experience with OIDC-compliant IDPs (Auth0, Okta, Cognito) Deep knowledge of auth standards (OAuth2, OIDC, SAML, JWTs) Solid More ❯

An exciting opportunity for an experienced Full-Stack Engineer to help transform a major Fixed Income front-office technology landscape. You'll architect and deliver high-performance, real-time React applications that support trading workflows, working closely with stakeholders to shape a scalable, future-ready platform. Key … Responsibilities: Design and develop modern, real-time React/Java applications for trading workflows Work closely with engineers to build robust, scalable, and low-latency systems Lead full-stack solution design, with a focus on backend performance, reliability, and system integration Translate business and technical requirements into cohesive system architectures Promote engineering excellence, modern development practices … in backend development, ideally with Java, REST APIs, and messaging frameworks Deep understanding of architecture and system design, including distributed and low-latency systems Ability to drive full-stack solutions, with a strong backend focus and solid UI fundamentals Demonstrated experience within a Rates or broader Fixed Income trading environment Strong appreciation for system-level design More ❯

on AWS, enabling us to deliver robust and scalable solutions to our clients. You will be supported by being positioned in a squad with a strong lead, principal, senior, mid-level and graduate engineers who will support your growth as well as a leader who will invest in your career. The Software Engineer is responsible for … Comply with project plans and industry standards Code Coverage provided on the code developed Key stakeholders: Influence, collaborate and co-ordinate with: Development Team Leader and/or Senior and Principal Developers – for direction and escalation Architecture, Security & Design team - to ensure that it is possible to implement the proposed designs, standards and quality Testers - to ensure deliverables More ❯

public and private sector brands operating in a variety of sectors including Civil Defence, Healthcare, Sustainable Environment and Land Asset Management, and Digital Democracy. The Role: As a Senior Full Stack Software Engineer at Informed Solutions, you'll take a leading role in designing, building, and delivering complex digital solutions that tackle … or Terraform. Desirable Skills Experience working in a consultancy environment, engaging with external stakeholders and clients. Exposure to public sector projects and delivering solutions in complex organisational landscapes. Senior colleagues, experts, and leaders at Informed Solutions are committed to supporting, coaching, upskilling, and enabling the success and career progression of each other. There are some foundation areas, however … make a tangible impact while advancing your career. You'll gain: Ownership and influence: Lead the delivery of services, shape technical direction, and influence project outcomes at a senior level. Professional growth: Develop your leadership and mentoring skills, guiding colleagues and helping them thrive. Exposure to high-profile projects: Work on enterprise-scale digital solutions that improve public More ❯

and help us put health first Become a part of our caring community and help us put health first If you are a Sr level Full Stack Engineer with experience designing and developing accessible user interfaces, implementing robust backend microservices, and integrating the two with GraphQL, we're looking for you APPLY TODAY The … Sr Full Stack Engineer is a key contributor to our delivery organization, responsible for designing, developing, and deploying scalable, high-quality web applications from end to end. The ideal candidate is a versatile engineer who can independently own the full development lifecycle. This includes building accessible user interfaces, implementing robust … Qualifications Bachelor's Degree in Computer Science or related field, or equivalent professional experience 5 years' experience in software engineering, with at least 3 years focused on full-stack web development. 2 years' experience hands-on experience building front-end applications with , React, Lit, or similar frameworks. 2 years' experience developing back-end services with More ❯