1 to 25 of 52 Contract Senior Developer Jobs

Senior C# Developer - Commodities Trading - Outside IR35 Exciting opportunity for an experienced senior developer to build on their experience in Commodities or similar trading development role in this successful Commodities Trading company. £750 - 800 per day Outside IR35 The Senior C# Developer will have significant prior experience as a Senior Software Engineer/… Senior Developer working as C# Developer in a Commodities trading environment where they will have gained knowledge of the full trade life-cycle and feel comfortable speaking directly to traders and senior stakeholders in the business as well as senior technical colleagues such as architects. Central London location, with Hybrid working expected. Very strong core More ❯

Senior Go Developer London, UK 6 Month Contract An incredible opportunity for an experienced Senior Go Developer with strong backend engineering skills to join a prestigious tech client on a contract basis. Known for its high bar for engineering quality, this isn't your typical banking or fintech gig - contractors here are genuinely embedded, involved, and … making meaningful impact from day one. As a Senior Go Developer, you'll play a key role in building mission-critical, data-driven services that power core parts of the platform. You'll take ownership across the full development lifecycle, from system design and implementation to optimisation and release. You'll be working in an open, fast-moving … to shape how things are built and the trust to get on with it - whether that's improving infrastructure, shipping new features, or quietly refactoring something that needs it. Senior Go Developer - Key Requirements: Significant professional experience in software development, with a strong focus on backend systems Proficiency in Go/Golang and proven expertise in AWS, Kubernetes More ❯

Senior Java Developer Inside IR35 - 3 days onsite Our banking client is seeking an experienced Senior Java Developer to join their dynamic technology team. This role offers the opportunity to work on high-impact financial applications, driving innovation and excellence in software development within a fast-paced and regulated environment. As a Senior Java Developer … Knowledge of NoSQL databases (e.g., MongoDB). Experience with message queues (Kafka, Solace). Front-end development exposure (React, Angular, Vue.js). Experience building CI/CD pipelines . Senior Java Developer Due to the volume of applications received for positions, it will not be possible to respond to all applications and only applicants who are considered suitable More ❯

Vacancy: Senior Java Developer (Hybrid) Location: Amersfoort Duration: 6 months Our client is a fast-growing organisation in the energy sector and is looking for a Senior Java Developer to join their team. Responsibilities for the Senior Java Developer role include: Build and maintain back-end applications in the data sharing domain. Assist with … example by participating in the Community of Practice for developers. Work as part of an Agile SAFe team (office days are Tuesday and Thursday). Candidates applying for the Senior Java Developer role will need: OAuth 2.x/OpenID Connect At least 5 years of Java experience Recent experience with Java (17+) Frameworks: Spring Boot AWS Desirable skills … for the Senior Java Developer role include: Experience in the energy sector Agile/Scrum SAFe experience Asynchronous messaging (Apache Kafka) Relational databases (AWS Aurora MySQL/MariaDB preferred) Git (GitLab preferred) Build tools such as Gradle/Maven SonarQube/SonarCloud Container orchestration platforms (RedHat OpenShift/Kubernetes preferred) CI/CD: Helm Charts, ArgoCD Contract-driven More ❯

PLEASE NOTE THIS ROLE IS 2 DAYS ON SITE AND INSIDE IR35 Role: Mid/Senior Developer - Contract (Inside IR35) Location: Hybrid (2-3 days onsite in Warrington or York, rest remote) Duration: 6 months (likely extension) We are seeking an experienced Mid/Senior Developer to join a large digital experience programme. This is an More ❯

Senior Integration Developer - Active SC, D365 Finance, APIS, Azure Up to £515 per day (Inside IR35) Remote/must be UK based 12 months My client is an instantly recognisable consultancy who seek a Senior Integration Developer, with active SC clearance and experience in Microsoft Dynamics 365 Finance, to lead the design and implementation of robust … secure, and scalable integrations for an end client. Key Requirements: Hands-on experience as a Senior Integration Developer, with D365 Finance integrations. Active Security Clearance (SC) Deep knowledge of REST APIs, OData, DMF packages, and data mapping (XSLT, XML, JSON, CSV). Proficiency in tools like Postman, Azure Logic Apps, PowerShell, and C#. Experience with ETL processes, error More ❯

Fixed Income Senior Analyst Developer C# (VP) City of London Hybrid (3/2 split) 6-months contract £720 per day cer Financial are working alongside an international bank, who are based in the City of London. They are seeking a Fixed Income Senior Analyst Developer C# (VP) to work with them on a 6-months … contract. The responsibilities of the Fixed Income Senior Analyst Developer C# (VP) will include: Responsible for effective and efficient running of the Fixed Income systems, integrated into the wider banks environment to meet the needs of the banks trading desks. Delivering fast-paced agile high quality software changes and solutions, help running Scrums, Sprints and creating and deploying … changes. Advanced business knowledge and experience in Fixed income and proven ability to work closely with Fixed Income traders to help deliver their strategic objectives. The successful Fixed Income Senior Analyst Developer C# (VP) will have: Core Development Languages covering .Net Core, C# Experience in financial industry Hands-on experience with automated testing environments and CI/CD More ❯

Senior PHP Developer Location: Home-based - Remote - UK Based applicants only Duration: Contract until 31 st December 2025 Expected extension Rate: £350 - £370 Inside IR35 Are you an experienced Senior PHP Developer with a passion for building secure, scalable, and business-critical applications? Were looking for a Senior PHP Developer to join our transformation More ❯

Senior PHP Developer Location: Home-based - Remote - UK Based applicants only Duration: Contract until 31 st December 2025 - Expected extension Rate: £350 - £370 Inside IR35 Are you an experienced Senior PHP Developer with a passion for building secure, scalable, and business-critical applications? We're looking for a Senior PHP Developer to join our More ❯

Senior PHP Developer Location: Home-based - Remote - UK Based applicants only Duration: Contract until 31 st December 2025 – Expected extension Rate: £350 - £370 Inside IR35 Are you an experienced Senior PHP Developer with a passion for building secure, scalable, and business-critical applications? We’re looking for a Senior PHP Developer to join our More ❯

Senior Integration Developer - D365 Finance, APIS, Azure Up to £515 per day (Inside IR35) Remote/must be UK based 3 months initially (open to extension) My client is an instantly recognisable consultancy who seek aSenior Integration Developer, with experience in Microsoft Dynamics 365 Finance,to lead the design and implementation of robust, secure, and scalable integrations … for an end client. Key Requirements: Hands-on experience as a Senior Integration Developer, with D365 Finance integrations. Deep knowledge of REST APIs, OData, DMF packages, and data mapping (XSLT, XML, JSON, CSV). Proficiency in tools like Postman, Azure Logic Apps, PowerShell, and C#. Experience with ETL processes, error handling, idempotency, and throttling. Strong understanding of secure More ❯

Senior KDB+ Developer – Investment Bank – London (Hybrid) Rolling 12-Month Contract | Up to £1000/day | Inside IR35 Hybrid – 2 Days Onsite in London A leading investment bank is seeking a Senior KDB+ Developer to join their high-performing Fixed Income Algo Trading team . This is a rare opportunity to work directly with traders, building More ❯

Senior Android Developer position for an international bank which is a hybrid position in Leeds with 2 days a week onsite. Senior Android Developer Professional working knowledge in designing a mobile experience for variable screen sizes in variable versions of Android Excellent knowledge of Kotlin/Java Strong knowledge of Android SDK, Android UI design principles More ❯

Senior Integration Developer 6 months Outside IR35 Remote We are seeking a skilled and experienced Senior Integration Developer to join our dynamic team. This role will focus on designing and implementing integrations using D365 APIs, developing automated processes for data transformation, and ensuring compliance with audit standards. The ideal candidate will possess a strong technical background More ❯

Senior APEX Developer Bristol, Leicester, or Plymouth (2 days per week onsite) 425 - 525 per day (Inside IR35) 6-month contract Must hold active & transferrable SC clearance (used within the last 12 months) The Opportunity We're seeking an experienced Senior Oracle APEX Developer to play a key role in supporting critical engineering and digital programmes … be involved in projects that are both technically challenging and genuinely meaningful - supporting the safety and operational readiness of the UK naval fleet. If you're an experienced APEX Developer with the right clearance and a background in complex, secure environments, we'd love to hear from you. More ❯

Senior APEX Developer Bristol, Leicester, or Plymouth (2 days per week onsite) £425 - £525 per day (Inside IR35) 6-month contract Must hold active & transferrable SC clearance (used within the last 12 months) The Opportunity We're seeking an experienced Senior Oracle APEX Developer to play a key role in supporting critical engineering and digital programmes … be involved in projects that are both technically challenging and genuinely meaningful - supporting the safety and operational readiness of the UK naval fleet. If you're an experienced APEX Developer with the right clearance and a background in complex, secure environments, we'd love to hear from you. More ❯

Job Title: Senior Java Developer Role Summary: We are looking for a highly skilled Senior Java Developer to design, develop, and maintain enterprise-grade applications. The role involves working closely with architects, business analysts, and cross-functional teams to deliver scalable, secure, and high-performing solutions. Key Responsibilities: Design, develop, and implement robust Java-based applications More ❯

Contract Lead Full Stack Developer | Java/TypeScript/Node.js/Next.js | Fully Remote | £550-£600 p/day | Outside IR35 | 3-week contract A long-standing client of ours is looking for a user-focused Senior Developer to deliver the final phase of a large-scale SaaS platform. The project is currently around 60% complete, and … Postgres Node.js/Next.js (both ideal) Deep knowledge of AWS Lambda If this sounds like you and you're up for this project- apply now! Contract Lead Full Stack Developer | Java/TypeScript/Node.js/Next.js | Fully Remote | £550-£600 p/day | Outside IR35 | 3-week contract Oscar Associates (UK) Limited is acting as an Employment Business More ❯

D365 Senior Developer - D365 Finance, APIS, Azure Up to £515 per day (Inside IR35) Remote/must be UK based 12 months We're looking for an experienced D365 Finance & Operations Developer to lead the development of custom journal processing extensions. This role suits someone with strong X++ skills and a deep understanding of D365 Finance, especially More ❯

D365 Senior Developer - D365 Finance, APIS, Azure Up to £515 per day (Inside IR35) Remote/must be UK based 1 2 months We're looking for an experienced D365 Finance & Operations Developer to lead the development of custom journal processing extensions. This role suits someone with strong X++ skills and a deep understanding of D365 Finance More ❯

D365 Senior Developer - D365 Finance, APIS, Azure Up to £515 per day (Inside IR35) Remote/must be UK based 1 2 months We're looking for an experienced D365 Finance & Operations Developer to lead the development of custom journal processing extensions click apply for full job details More ❯

Senior/Lead Java Developer £(Apply online only) per day Outside IR35 Fully Remote (Must be UK based) Initially 6 Months (Project scope for 12-24 Months) Start ASAP! Unify are proudly, exclusively representing a highly respected digital transformation partner, as they embark on another exciting, high profile program of works. We are looking for 2 Senior or Lead Java Developers to join the team on a long term contract basis. ***The ideal Senior/Lead Java Developer will have proven experience of working on long term Government, defense or public sector projects, with a team playing, consultative approach, with excellent communications and customer facing skills*** We need: Strong experience in Java Development Experience More ❯

Senior Java Developer - £(Apply online only)pd inside IR35 - 12 month contract - Leeds (3 days per week onsite)** We are looking for several Java Developers to contribute to the most demanding and exciting new digital service for the UK Government. Day-to-day you will be an integral part of a team in designing, creating and improving new More ❯

Were looking for a Senior Java Developer for our public sector client based in Leeds on an initial 12-month contract paying up to £700 per day Inside IR35. This role allows hybrid working with an expectation to attend the office 3 days per week. You will need to either hold current BPSS clearance or have the ability … to pass it, and be eligible for SC clearance. The successful Senior Java Developer will possess proven skills working with the following Java 21 (or later) Test Driven Development (TDD) and Behaviour Driven Development (BDD) Large microservice architectures Agile environments and pair programming Implementing APIs for internal and external use Building automated test suites in CI/CD … traffic websites and handling large data sets Interested? Please apply below. Java Software Engineer, Java, Java 21, Microservices, TDD, BDD, Agile, APIs, CI/CD, Leeds, Government, Public Sector, Developer, Contract, Inside IR35 More ❯

Senior Angular Developer Contract 6-18 Months Dublin. My client a leader in their space is in urgent need of a talented and experienced Angular Developer to join them on a contract basis for 6 months (extendable up to 18-24 months) As a Senior Angular Developer you will build business-critical systems, with emphasis More ❯