17 senior full stack engineer jobs found

Senior AI Engineer (Full Stack AI & Agentic Systems) - Python/React/FastAPI - OUTSIDE IR35 - Telco Sector - Enterprise AI Platform Tecknuovo is a digital technology consultancy with a Deliberately Different approach. We believe great outcomes come from great people, not just great technology. We move quickly, work collaboratively, and ensure our clients are left with Zero Dependency at the end of every engagement. What you'll be working towards: We're looking for an experienced Senior AI Engineer to join a strategic enterprise AI programme supporting the continued evolution of a large-scale AI platform. This engagement focuses on developing and scaling next-generation AI capabilities that provide conversational access to enterprise data and services through Large Language Models (LLMs), Retrieval-Augmented Generation (RAG) and Agentic AI. You'll play a key role in shaping the future direction of the platform, helping to define AI architecture, governance...

Senior Node.js Developer - 3 month Contract - paying £500 Outside IR35 - Hybrid (London) About the client Our client is looking for an experienced Node.js Developer to join on a contract basis and help build and scale the services behind their consumer journeys. The role Design, build and maintain scalable Back End services and APIs using Node.js and TypeScript Develop and integrate with partner and supplier APIs to deliver accurate, Real Time quotes and comparisons Contribute to an event-driven, microservices-based architecture running on AWS Write clean, well-tested code and take ownership of quality through unit, integration and end-to-end testing Improve the performance, reliability and observability of production services Work closely with product managers, designers, QA and other engineers in a cross-functional agile squad Take part in code reviews, technical design discussions and continuous improvement of engineering practices Support and mentor other engineers...

Principal Full Stack Engineer Azure AI Search & Elasticsearch 6-month contract Outside IR35 London- 2 days onsite We are looking for a Principal Full Stack Engineer to lead the design and delivery of enterprise search and AI-driven applications. This is a senior, hands-on contract combining search architecture, full-stack development, Microsoft Azure, DevOps and Generative AI click apply for full job details

Senior Full Stack .NET Developer - Contract C# .NET ASP.NET Core Vue 3 TypeScript REST APIs £400-£450 per day Outside IR35 Remote UK Contract We're looking for an experienced Senior Full Stack .NET Developer/.NET Contractor to join a global SaaS engineering environment, working across Back End services and a modern web application. This is a UK-based remote contract working with an international engineering team across the UK, New Zealand, US and Canada. You MUST be UK based to be considered. The Role You'll be hands-on across C#, .NET, ASP.NET Core Web APIs, Vue 3 and TypeScript, developing new functionality and enhancing an established SaaS platform. You'll work across: C#/.NET/ASP.NET Core/.NET 5+ Vue 3/TypeScript/Composition API/ REST APIs & Back End services Automated testing & maintainable code GitHub & modern development practices AI-assisted development tools such as Claude Code You'll be joining an established...

Leading eCommerce client now requires a Full Stack JavaScript Engineer to contribute towards the design and development of their evolving digital ecosystem. You will work across their front and Back End applications delivering features and improvements to support their digital roadmap. Key Requirements: Strong hands-on Full Stack development skills - React.js, Next.js, Node.js and TypeScript. Heavy hands-on testing experience (TDD, DDD). Extensive experience developing APIs/Event driven architectures and working with cloud technologies such as AWS. GraphQL/Nest.js experience Used to working in a scrum based agile team. Excellent communication skills with the ability to work autonomously and hit the ground running. This is an initial 6-month contract role which provides a daily rate of £575 (Outside IR35). In terms of working structure, this is a hybrid role with 1 day per week in their Central London office and the rest remote.

Principal Full Stack Engineer - Azure AI Search & Elasticsearch 6-month contract Outside IR35 London - 2 days onsite We are looking for a Principal Full Stack Engineer to lead the design and delivery of enterprise search and AI-driven applications. This is a senior, hands-on contract combining search architecture, full-stack development, Microsoft Azure, DevOps and Generative AI. Key responsibilities Design and optimise enterprise search solutions using Elasticsearch and Azure AI Search. Define Elasticsearch cluster architecture, index mappings, aggregation queries and life cycle strategies. Improve search relevance, indexing performance, query latency and platform resilience. Build Azure AI Search solutions using indexers, custom skillsets, vector search and semantic ranking. Develop responsive, search-focused applications using JavaScript/TypeScript and React, Angular or Vue. Design and integrate APIs and Back End services across the Azure ecosystem. Build...

Senior Software Engineer Full Stack Developer (Frontend most important) TypeScript or Express.js / Kotlin or Springboot / AWS Initial 6 Month Contract Fully Remote (UK Based) £525-550 per day, Outside IR35 Active SC required We're working with a UK Consultancy client who are putting a team together to deliver a high-profile Cloud-Native Government program. We need Senior Software Engineers who hold active SC Clearance, and have good Full Stack experience with Kotlin, Spring Boot (Java), Express.js or TypeScript, AWS and Terraform or AWS CloudFormation. The Frontend experience is preferable. Urgent Contracts starting ASAP, fully remote, paying up to £550 per day, Outside IR35. Initial 6 month engagement with long term extensions. Tech stack: Frontend (Frontend is the more important end of the stack for this role) Building UIs using Express.js and TypeScript GDS standards Nunjucks Integrating with the backend services Backend...

Senior Full Stack .NET Developer - Contract C# | .NET | ASP.NET Core | Vue 3 | TypeScript | REST APIs £400 - £450 per day | Outside IR35 | Remote UK | Contract We're looking for an experienced Senior Full Stack .NET Developer / .NET Contractor to join a global SaaS engineering environment, working across backend services and a modern web application. This is a UK-based remote contract working with an international engineering team across the UK, New Zealand, US and Canada. You MUST be UK based to be considered. The Role You 'll be hands-on across C#, .NET, ASP.NET Core Web APIs, Vue 3 and TypeScript, developing new functionality and enhancing an established SaaS platform. You 'll work across: C# / .NET / ASP.NET Core / .NET 5+ Vue 3 / TypeScript / Composition API / REST APIs & backend services Automated testing & maintainable code GitHub & modern development practices AI-assisted development tools such as...

Infrastructure Engineers Reading, fully on-site DV-Cleared Outside IR35 2-year programme Pigment is a change and transformation consultancy. We partner with other consultancies, government departments, and private sector organisations to solve complex change across Government and Defence. We are looking for a team of experienced DV-Cleared Linux Infrastructure Engineers to provide specialist operating system and infrastructure support for some work within our defence portfolio. The team will be responsible for the RHEL/Linux operating system layer underpinning the SAP platform, ensuring that the infrastructure is secure and capable of meeting the programme's operational and project requirements. The initial team is expected to comprise 2-3 engineers, with responsibilities and seniority distributed according to the individuals' areas of expertise. Please note that our team will likely be needed on-site 5 days per week in Reading due to project sensitivities. Team...

Infrastructure Engineers | Reading, fully on-site | DV-Cleared | Outside IR35 | 2-year programme Pigment is a change and transformation consultancy. We partner with other consultancies, government departments, and private sector organisations to solve complex change across Government and Defence. We are looking for a team of experienced DV-Cleared Linux Infrastructure Engineers to provide specialist operating system and infrastructure support for some work within our defence portfolio. The team will be responsible for the RHEL/Linux operating system layer underpinning the SAP platform, ensuring that the infrastructure is secure and capable of meeting the programme's operational and project requirements. The initial team is expected to comprise 2-3 engineers, with responsibilities and seniority distributed according to the individuals' areas of expertise. Please note that our team will likely be needed on-site 5 days per week in Reading due to project sensitivities. Team...

Senior Full Stack Developer (React/C# .NET) Contract: Initial 3-Month Engagement (Long-Term Programme) Location: Hybrid Working - Approximately 1 day per week in Birmingham (flexible based on project requirements) Rate: £500 per day - Outside IR35 Senior Full Stack Developers. Strong React/front-end capability. Strong C#/.NET Back End capability. Ability to operate across the full stack where required. Overview We are seeking experienced interim Senior Full Stack Developers to join a major business transformation programme focused on modernising platforms, data capabilities, and core business processes. You will need very strong React skills with core C# (recent) experience. This is a full stack role with a Front End bias. This is an opportunity to play a key role in the design, development, and delivery of enterprise-scale solutions, working across both Front End and Back End technologies while contributing to data migration, integration,...

Senior Full Stack Developer (React / C# .NET) Contract: Initial 3-Month Engagement (Long-Term Programme) Location: Birmingham - flexible remote working options available - Candidates UK wide can be considered Rate: £500 per day - Outside IR35 Senior Full Stack Developers. Strong React/front-end capability. Strong C#/.NET back-end capability. Ability to operate across the full stack where required. Overview We are seeking experienced interim Senior Full Stack Developers to join a major business transformation programme focused on modernising platforms, data capabilities, and core business processes. You will need very strong React skills with Core C# (recent) experience. This is a full stack role with a Front End bias. This is an opportunity to play a key role in the design, development, and delivery of enterprise-scale solutions, working across both front-end and back-end technologies while contributing to data migration, integration, and technical design activities....

Senior Full Stack Developer (React / C# .NET) Contract: Initial 3-Month Engagement (Long-Term Programme) Location: Birmingham - flexible remote working options available - Candidates UK wide can be considered Rate: £500 per day - Outside IR35 Senior Full Stack Developers. Strong React/front-end capability. Strong C#/.NET back-end capability. Ability to operate across the full stack where required. Overview We are seeking experienced interim Senior Full Stack Developers to join a major business transformation programme focused on modernising platforms, data capabilities, and core business processes. You will need very strong React skills with Core C# (recent) experience. This is a full stack role with a Front End bias. This is an opportunity to play a key role in the design, development, and delivery of enterprise-scale solutions, working across both front-end and back-end technologies while contributing to data migration, integration, and technical...

Senior Full Stack Developer (React / C# .NET) Contract: Initial 3-Month Engagement (Long-Term Programme) Location: Hybrid Working - Approximately 1 day per week in Birmingham (flexible based on project requirements) Rate: £500 per day - Outside IR35 Senior Full Stack Developers. Strong React/front-end capability. Strong C#/.NET back-end capability. Ability to operate across the full stack where required. Overview We are seeking experienced interim Senior Full Stack Developers to join a major business transformation programme focused on modernising platforms, data capabilities, and core business processes. You will need very strong React skills with core C# (recent) experience. This is a full stack role with a Front End bias. This is an opportunity to play a key role in the design, development, and delivery of enterprise-scale solutions, working across both front-end and back-end technologies while contributing to data migration, integration, and technical...

Senior Full Stack Developer (React/C# .NET) Contract: Initial 3-Month Engagement (Long-Term Programme) Location: Hybrid Working - Approximately 1 day per week in Birmingham (flexible based on project requirements) Rate: £500 per day - Outside IR35 Senior Full Stack Developers. Strong React/Front End capability. Strong C#/.NET Back End capability. Ability to operate across the full stack where required. Overview We are seeking experienced interim Senior Full Stack Developers to join a major business transformation programme focused on modernising platforms, data capabilities, and core business processes. You will need very strong React skills with core C# (recent) experience. This is a full stack role with a Front End bias. This is an opportunity to play a key role in the design, development, and delivery of enterprise-scale solutions, working across both Front End and Back End technologies while contributing to data migration, integration, and technical...

Senior Full Stack Developer (React / C# .NET) Contract: Initial 3-Month Engagement (Long-Term Programme) Location: Birmingham - flexible remote working options available - Candidates UK wide can be considered Rate: £500 per day - Outside IR35 Senior Full Stack Developers. Strong React/front-end capability. Strong C#/.NET back-end capability. Ability to operate across the full stack where required. Overview We are seeking experienced interim Senior Full Stack Developers to join a major business transformation programme focused on modernising platforms, data capabilities, and core business processes. You will need very strong React skills with Core C# (recent) experience. This is a full stack role with a Front End bias. This is an opportunity to play a key role in the design, development, and delivery of enterprise-scale solutions, working across both front-end and back-end technologies while contributing to...

Senior Full Stack Developer (React / C# .NET) Contract: Initial 3-Month Engagement (Long-Term Programme) Location: Hybrid Working - Approximately 1 day per week in Birmingham (flexible based on project requirements) Rate: £500 per day - Outside IR35 Senior Full Stack Developers. Strong React/front-end capability. Strong C#/.NET back-end capability. Ability to operate across the full stack where required. Overview We are seeking experienced interim Senior Full Stack Developers to join a major business transformation programme focused on modernising platforms, data capabilities, and core business processes. You will need very strong React skills with core C# (recent) experience. This is a full stack role with a Front End bias. This is an opportunity to play a key role in the design, development, and delivery of enterprise-scale solutions, working across both front-end and back-end technologies while contributing...