1 to 25 of 27 Permanent Full-Stack Engineer Jobs in Southampton

Mid - Snr Software Engineer - Tech for good Location: Remote/Hybrid (UK or Ireland-based, occasional in-person travel) Contract: 9-month fixed-term (Full-time, PAYE) Salary: Up to £65k Make an Impact, Tech That Matters Join a pioneering startup on a mission to break … Help shape engineering culture in a small, high-impact team You'll Thrive Here If You Have 6+ years' experience as a full-stack engineer Are confident building both frontend (React, Nuxt, JS frameworks) and backend (FastAPI, Node.js, GraphQL, etc.) systems Write clean, consistent More ❯

Full Stack Developer (Junior to Mid-Level) - Fully Remote | SaaS Web Analytics Are you a passionate developer eager to make an impact in a fast-paced SaaS environment? This is a brilliant opportunity to join an More ❯

Senior Full-Stack Engineer (TypeScript & LLM Integration) £80-110K + Equity A hugely exciting AI start-up is seeking several experienced Full-Stack Engineers to join a dynamic product team, focused on building innovative software powered by cutting-edge More ❯

💼 Full Stack Developer – Financial Compliance Innovation (Hybrid or Fully Remote) 📍 Location : London or Remote 🕗 Hours : 8:30 – 5:30 (Some flexibility required) An innovative financial organisation is seeking a Full Stack Developer More ❯

Senior Full Stack Developer | Golang, React, AWS | up to £90,000 We’re hiring a Senior Full Stack Developer for a growing SaaS company that's modernising how businesses handle risk and More ❯

Full Stack Developer (Web) – UK Remote No visa sponsorship available (need full UK right to work) and already be based in the UK. Aardvark Swift is proud to be working with a pioneering business More ❯

Fullstack Developer – Python/Django £60,000 | Fully Remote (UK-Based) | Flexible Hours We’re working with a product-led scale-up in the proptech space that’s on the lookout for a Fullstack Developer to join their tight-knit More ❯

🔧 Full Stack Developer - AWS | Node.js | React - (Mid-Level) – Up to £55,000 📍 Location: Remote - Must Be UK Based 💻 Full Time | Flexible Working | Unlimited Annual Leave Are you a Full Stack More ❯

Job Title: Full Stack Software Engineer - Healthcare Industry: Biotechnology Research Location: UK (Remote) Princeton Biopartners is a best-in-class provider of integrated consulting solutions to the life sciences sector. Our mission is to improve the evidence base, accessibility, and dissemination of biomedical innovations … pain points via integrated and transformative projects. We are looking for a highly motivated and talented Full Stack Software Engineer to become our first full-time technology hire. As a Software Engineer, you will be critical in bridging the gap More ❯

Founding Engineer (Full Stack) - Digital estate planning wealthtech Location: UK-based, remote-first (with occasional London meet-ups) Compensation: Founding equity + pre-seed salary Start: Immediate About Inheritly Inheritly is rethinking how families prepare for “death and taxes.” Our mission is to help … our first full-time engineer to shape the product and the codebase. The Role We’re hiring a Full-stack Engineer as a founding team member and likely future Tech Lead. You’ll report directly to the founding team, work More ❯

Senior Full Stack Engineer – AI Platform £90k - £120k + Equity React and Node on AWS Fully Remote We’re hiring on behalf of a well-funded AI-first startup building the next generation of LLM-powered agents that are transforming enterprise customer experience. They … are pioneering empathetic, agentic workflows across chat, voice, and messaging channels. They’re now looking for a Senior Full Stack Engineer to join their small … high-calibre team. If you’re excited by AI-powered products, high ownership, and working on meaningful real-world problems. Key Responsibilities 🧱 Full-Stack Product Engineering Design, build, and maintain scalable features across the frontend, backend, and infrastructure Contribute to an AI-first platform integrating large More ❯

closely with Architecture, DevOps, and Product to deliver high-impact features in a fast-moving, innovation-driven environment. 🛠 Responsibilities Develop and maintain full-stack applications using Node.js , TypeScript , NestJS , and React Design and implement scalable serverless backends with AWS Lambda , API Gateway , DynamoDB , and Cognito Build More ❯

Senior Full-Stack Developer – High-Growth Tech Startup Location: Remote Salary: Up to £85,000 This ambitious, early-stage tech startup is transforming how digital platforms leverage data and automation. Backed by a growing client base and a clear product vision, they are building a solution … that integrates complex data sources to power real-time insights and streamlined workflows. They are now seeking a Senior Full-Stack Developer to join their lean, high-performing team. This is a pivotal opportunity for someone who thrives in fast-paced environments, enjoys autonomy, and brings … development from shaping APIs to delivering high-performance user interfaces helping define the technical direction of a rapidly evolving product. Responsibilities Lead full-stack development using NestJS, MongoDB, React, and TypeScript. Integrate and manage third-party APIs, including Meta’s API and a separate API for More ❯

Duties As Full Stack Engineer, you will work in small teams in a highly collaborative way, use the latest technologies and enjoy seeing the direct impact from your work. Our highly skilled system architects and development managers configure software packages and build custom applications More ❯

Senior Full Stack Engineer - TypeScript, LLMs Fully Remote - UK based Salaries paying £85k - £110k + equity Oliver Bernard have partnered with a growing AI start-up who have recently secured another round of funding, and are now looking for talented Senior Full Stack Engineers to shape the product and company from the ground up. We are looking for a Mid Level Engineer to join our client's dynamic product team. This is … an incredible opportunity to work with cutting-edge AI technologies and drive innovation in B2B software solutions. Role Overview: As a Senior Full-Stack Engineer, you will contribute to a unified codebase powering both B2B platforms and custom AI integrations. You'll be involved More ❯

Full Stack Engineer (backend leaning). 📍 Remote First (UK) with an office in Central London. 💰: £45,000 - £75,000 This is a unique opportunity to join a growing company aiming to revolutionise the way we do our finances. With a lean, agile team of … working in an exciting environment, directly contributing to the company’s success. About the Role. We’re looking for a Full Stack Engineer to help design, develop, and scale our FinTech platform. This role leans heavily towards backend development, where you'll be responsible … TypeScript 🔹Frontend: React.js 🔹Infrastructure: AWS Lambda, Serverless Computing 🔹Architecture: Microservices What We’re Looking For? 👀 🔹Hands-on experience as a Full Stack Engineer or in a similar role. 🔹Strong proficiency in Node.js, React.js, and TypeScript . 🔹Knowledge of cloud platforms (AWS) and serverless technologies More ❯

Join Our Dynamic Team as a Full Stack Engineer ✨ 📍Location: Remote (UK Hours) 🕹️Role Type: Contract (40 hours per week) 💲Salary: Competitive base salary equivalent of £45,000 pa 🤓 Experience Level: Jnr - Mid 🌈 About Us: GenderGP are transforming the gender non-conforming (GNC) sector … exceptional value and experiences to our GNC customers. As we continue to grow, we are seeking TWO passionate and dynamic Full Stack Engineer s to join our forward-thinking team. 💪 What You'll Do: We’re building a cohesive, high-performing in-house engineering … of GenderGP’s technology suite, including web applications, data analytics platforms, AI tools, and internal systems. We’re looking for a versatile Full-Stack Engineer who is passionate about working across the technology stack – from exciting and engaging user experiences through to More ❯

Staff Full Stack Engineer | AI Lending PaaS | Fully Remote (Must be based in UK) Join a fast-growing, VC-backed startup on a mission to transform lending with cutting-edge AI. Our AI-driven Lending Platform-as-a-Service (PaaS) is set to redefine … stage, build from the ground up, and own significant equity in a high-growth company. What You’ll Do 🛠 Design & build scalable full-stack applications for AI-driven lending automation ⚙️ Develop high-performance APIs and backend services using Go and Node.js 🎨 Create sleek, intuitive UIs with … engineering, DevOps, and CI/CD in a fast-moving startup What We’re Looking For ✅ 7 + years of experience in full-stack development ✅ Strong expertise in Go, Node.js, React, and TypeScript ✅ Experience building scalable, event-driven architectures (Kafka, gRPC, etc.) ✅ Solid understanding of cloud More ❯

Full Stack Engineer - TypeScript, LLMs Fully Remote - UK based Salaries paying £60k - £80k + equity Oliver Bernard have partnered with a growing AI start-up who have recently secured large round of funding, and are now looking for talented Full Stack Engineers to shape the product and company from the ground up. We are looking for a Mid Level Engineer to join our client's dynamic product team. This … is an incredible opportunity to work with cutting-edge AI technologies and drive innovation in B2B software solutions. Role Overview: As a Full-Stack Engineer, you will contribute to a unified codebase powering both B2B platforms and custom AI integrations. You'll be involved More ❯

and intelligent agents. Support the transition of these POCs into scalable, production-ready solutions. C Contribute to the design and development of full-stack applications for both GenAI and traditional projects, while helping establish the infrastructure for reliable end-to-end deployments. Candidate Profile Eligible for More ❯

Fullstack Software Engineer – Remote - £65k – C#, React, Azure Unfortunately, the role does not off Sponsorship, and applicants must be UK based Are you an animal lover? How would you like to design and build applications that directly affect the lives of pets and their owners? This is an More ❯

Role : Senior Full Stack Engineer (BE Lean) Salary range : 65,000 - 100,000 (+ stock options) Location: Remote (must be willing to travel for conferences) Tech stack includes : React, Typescript, React Native, AWS, Postgres Multiple Full Stack Engineers More ❯

Senior Full Stack Engineer | VC Funded Gifting/Rewards | Remote 💻 Senior Full Stack Engineer 🎁 Gifting/Rewards Platform 🌍 Remote First - (UK) 💰 Up to £110,000 p/a ⚙️ Stack: Typescript, Node, React, Fastify et al. I … and celebrate teams and clients with meaningful gifts, vouchers and unique experiences. We are looking for a backend leaning Senior Full Stack Engineer, proficient in Typescript, Node, React and Fastify with cloud experience to join a growing team of customer-centric, cross functional engineers. … If you are a Senior Full Stack Engineer looking to join a thriving company working to improve employee satisfaction across the country, this will be a perfect opportunity. Interested and available to start within a month? Apply within or reach out to James for More ❯

Freelance Full Stack TypeScript Engineer - B2B Sustainability - Remote - Outside IR35 I'm very excited to be back working with one of our long-standing partners. a revolutionary B2B Sustainability Platform, who are looking for a delivery-focussed Fullstack Engineer. The client is an awesome More ❯

Engineer - Early-Stage Startup - Python/Django/Node.js A profitable, fast-moving startup is looking for a Full Stack Engineer to join a small, focused team. This is a unique opportunity to work directly with a technical founder , ship quickly to … help build something users genuinely love, this might be the right fit. Fully remote. Flexible hours. High impact. No fluff. Fully Remote Software Engineer - Early-Stage Startup - Python/Django/Node.js More ❯