19 of 19 Contract Senior Developer Jobs in London

Senior Snowflake Developer Hybrid - 4 days on-site p/w in London Initial Contract to 30th June 2027 Inside IR35 up to £771.94 per day Umbrella Rate Are you a Senior Snowflake Developer who wants to build the data platform behind credit risk reporting … leading financial services organisation? We're recruiting for a contract Senior Snowflake Developer position in a credit risk reporting function that is migrating legacy SQL Server platforms (SSIS, SSRS and SSAS) onto Snowflake, dbt and Python, with Power BI reporting on top. You'll rebuild existing transformation logic ...

Senior Developer Consultant (iPaaS & Automation) Rate: Up to £495 per day Duration: 3-6 Months Location: London (Remote with occasional onsite visits) Security Clearance: Active SC Clearance Essential Overview We are seeking a highly skilled Senior Developer Consultant to join a fast-paced transformation programme, delivering … Contribute to technical standards, best practices, and deployment frameworks. Support troubleshooting, optimisation, and continuous improvement of deployed solutions. Essential Experience Proven experience as a Senior Developer, Technical Consultant, or Integration Developer within enterprise environments. Strong experience designing and implementing distributed systems and integration solutions. Experience working with ...

Senior Salesforce Developer 12 Month contract 600 a day Inside IR35 Location - London/Hybrid We are looking for an experienced Senior Salesforce Developer to take a leading hands-on role in the continued development and enhancement of a multi-org Salesforce estate. The organisation currently … have gone beyond theoretical exposure and have personally designed, built and implemented Agentforce agents into a production environment . Key Responsibilities Act as a senior hands-on developer across the Salesforce estate. Design, build, test and deploy scalable Salesforce solutions using Apex, Lightning Web Components (LWC), SOQL ...

Title: Senior Developer - AI Enablement (AWS Bedrock, Python/TypeScript, AI Gateway) Location: Remote (UK-based) Rate: Negotiable/Competitive (Inside IR35) Duration: 6 Months Initial Clearance: SC Clearance Required - active clearance used on a government project within the last 12 months. Overview: Contract opportunity for a Senior Developer (AI Enablement) to join a team building a central Enterprise AI Gateway. This hands-on role blends strong production backend and cloud engineering with practical generative AI integration, including LLM APIs, agentic tooling, and enterprise security controls. Key Responsibilities: Design, build, test, and maintain backend microservices ...

Senior ServiceNow Developer Key responsibilities: * Work with the ServiceNow Engagement Lead and business stakeholders to translate agreed requirements into functional and technical solution designs, contributing to and, where appropriate, facilitating solution-design workshops. * Design, configure, develop and implement end-to-end ServiceNow solutions, including Flow Designer workflows, Business … configure and help embed approved ServiceNow AI capabilities, including Now Assist and AI Agents, into new and existing solutions. * Work with the Principal ServiceNow Developer on more advanced agentic use cases and contribute to the platform's AI roadmap. * Design, develop and support integrations between ServiceNow and other enterprise ...

Senior Full Stack Developer (React, Python & Azure AI) Location: London/Hybrid Start: ASAP About the Opportunity We are seeking an experienced Senior Full Stack Developer to join a cutting-edge programme focused on delivering AI-powered solutions on Microsoft Azure. This initial workstream is dedicated … work on innovative AI initiatives, cloud-native applications, and large-scale data-driven solutions while helping shape future platform capabilities. The Role As a Senior Full Stack Developer, you will play a key role in designing, developing, and deploying modern web applications that integrate with AI-powered services ...

Senior Backend Developer Full-time Inside IR35 Hybrid 1 office day London Farringdon office address: 47-53 Charterhouse St, London, EC1M 6PB Join a dynamic energy provider dedicated to sustainable solutions in the UK. We seek enthusiastic and resourceful Backend Python Engineers at senior levels … systems and extensive datasets. Foster close collaboration with our Product, Data, Front-end, Platform, and Security teams. Knowledge and Skills: Demonstrated expertise as a Senior Backend Developer. Proficiency in Python as your primary language, or willingness to adapt. Hands-on experience with RESTful APIs and/or GraphQL. Proficiency ...

Senior Ruby on Rails Engineer (Active SC) £650-£675/day Inside IR35 | 6 Months | Predominantly Remote We are seeking a Senior Ruby on Rails Engineer to join a large-scale content transformation programme. This role goes beyond development, requiring someone who can lead technical discovery, solve complex … Rails services Contribute to architecture and technical strategy Collaborate with multidisciplinary teams Support delivery within a complex digital environment We're Looking For: Senior Software Engineers, Technical Leads or Lead Ruby Engineers Experience delivering production systems at scale Strong ownership mindset and technical judgement Comfortable working with ambiguity ...

Senior Python Developer £675 daily inside IR35 6 months Hybrid working (2 days per week onsite in either London, Bristol or Manchester) *Current SC Clearance is required for this role so ideally live SC or eligible to undergo the vetting process* Experience required: Programming and build: Strong Python ...

experienced Senior Salesforce Developer with a passion for building scalable, high-performing, enterprise-grade solutions? We're looking for a talented developer to join us on a 12-month contract and play a key role in the ongoing development and evolution of our Salesforce platform. Working closely … high-quality enterprise solutions. Essential Skills and Experience To succeed in this role, you'll bring at least five years' experience as a Salesforce Developer, with strong hands-on expertise in complex Salesforce development, customisation, cloud solutions and enterprise integrations. You'll demonstrate: Salesforce Development: Deep technical expertise ...

Role: Senior C# .NET Developer Location: London, UK Working Pattern: Hybrid, 3 days per week onsite, Canary Wharf or Liverpool Street Employment Type: Contract Rate: £500 a day Inside IR35 via Umbrella Role Overview We are seeking experienced Senior C# .NET Developers to join a strategic technology ...

Senior Backend Developer - Architecture, Data Modelling £(Apply online only) per day (Inside IR35 - Umbrella) London/Hybrid (3 days per week on-site) Duration: Initially 6 months My client is a global financial services organisation who are hiring an experienced Senior Backend Enginee r with strong Architecture … making complex enterprise applications faster, simpler and more reliable. This is a backend-focused role, with some frontend capability to deliver changes. Key Requirements: Senior backend engineering experience . A track record of building and operating enterprise-scale web applications, with substantial hands-on responsibility rather than purely architectural ...

Senior Backend Developer for Video on Demand and Live Streaming (GoLang) Contract 12 months OUTSIDE IR35 Remote (UK) A leading video platform is seeking experienced Senior Backend Developers with expertise in GoLang to contribute to the VoD2Live project. This person must have experience working on Streaming … providers, etc.). Ensure comprehensive documentation of systems and components. Implement and maintain robust monitoring and alerting systems for production environments. Required Skills & Experience: Senior or Lead level experience in backend development. Proficiency in GoLang (MUST-HAVE). Experience with at least one additional backend language (VCL, Node.js, Python ...

Opportunity | Tier 1 Investment Bank | Canary Wharf Overview Our client, a Tier 1 Investment Bank based in Canary Wharf, is seeking an experienced C# Developer to join a strategic application modernisation programme. This role sits within a technology team responsible for evolving critical business applications, supporting a transition from … work across the full software development lifecycle, contributing to the enhancement of existing applications while helping shape the future-state architecture. Key Information Role: Senior C# Developer Location: Canary Wharf, London (Hybrid Working) Contract Length: 6 Months Initial Contract Rate: £416 per day (Inside IR35) Start Date: ASAP ...

currently supporting our Central Government client who are seeking a Senior Python Developer initial 6 month contract. Location: London, Bristol OR Manchester - (hybrid) You will have: Programming and build: Strong Python coding ability and experience collaborating with others to develop, deploy and improve containerised, cloud-based applications. Familiarity ...

Senior Backend Developer for Video on Demand and Live Streaming (GoLang) - Contract - 12 months - OUTSIDE IR35 - Remote (UK) A leading video platform is seeking experienced Senior Backend Developers with expertise in GoLang to contribute to the VoD2Live project. This person must have experience working on Streaming ...

London | 3 Days Onsite | 52-Week Contract | Rate TBC Are you an experienced Java Full Stack Developer with strong Spring Boot expertise and active SC clearance We're looking for a talented Senior Java Developer to join a high-performing engineering team, designing and delivering scalable, high ...

client is leading FS consultancy looking for a Senior KDB +/q Developer to work on a long term project Required Qualifications & Skills: Technical Expertise: Deep, hands-on commercial experience programming in KDB+/q and understanding internal database architecture. Operating Systems: Strong proficiency in UNIX/ ...

Join a dynamic energy provider dedicated to sustainable solutions in the UK. We seek enthusiastic and resourceful Backend Python Engineers at senior levels who are passionate about crafting exceptional products. Initially it will be a six-month contract but there is potential for it to be extended. The role … systems and extensive datasets. Foster close collaboration with our Product, Data, Front-end, Platform, and Security teams. Knowledge and Skills: Demonstrated expertise as a Senior Backend Developer. Proficiency in Python as your primary language, or willingness to adapt. Hands-on experience with RESTful APIs and/or GraphQL. Proficiency ...