19 of 19 Contract Senior Developer Jobs in London

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 ❯

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 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 ❯

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 ❯

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 Java Engineer Location: London (1-2 days a week in the office, mandatory on Thursdays) Experience: Minimum 8-10 years Technical Skills: Proficiency in Java 8 (transitioning to Java 17) Retail banking experince Experience with Spring Boot 2.4 and above Knowledge of Continuous Integration Apigee Java Testing API experience If all the above skills match your profile, please More ❯

Senior Java Developer - Credit, E-Trading, Algo sought by leading investment bank based in the city of London.**Inside IR35 - 4 days on site** The role: Project work also includes enhancements to the auto-quoting and algo framework for pricing, offering, and quoting. Will specifically focus on engagement, framework design and development of deliverables for Credit Cash electronic More ❯

I am currently working with a London-based financial services client who are actively seeking a Senior Java Developer to aid in the development of a business-critical application. What you'll need to succeed Extensive development experience with Java 17+ within financial services - mandatory. Expertise in distributed programming with distributed cache/data grids. Strong cloud experience More ❯

Your new role We are currently seeking a D365 Senior Integration Developer (finance) to design and implement integrations using D365 API's (e.g. Data Management Package, REST API, OData) You will develop automation processes for data transformation, upload, import and error handling in batch or near real-time modes.Alongside this, you will configure authentication (eg OAuth with Entra More ❯

Your new role We are currently seeking a D365 Senior Integration Developer (finance) to design and implement integrations using D365 API's (e.g. Data Management Package, REST API, OData) You will develop automation processes for data transformation, upload, import and error handling in batch or near real-time modes. Alongside this, you will configure authentication (eg OAuth with More ❯

developing great software in Python and an interest in adopting cutting-edge technology. In order to be suitable for this Lead Software Engineer role you must be an accomplished developer with a passion for technology and desire to mentor a team. You will hold proven experience delivering SaaS projects in Python and will be keenly interested in AI and … ML. Experience with AWS and data engineering would be advantageous to your application. In this role of significant responsibility, you will be both a Lead Developer and guide 2 in-house developers and an offshore team. You will act as a technical authority on software written in Python, lead architectural discussions, code, ensure technical quality and deliver complex software More ❯

I am currently working with a London-based Tier 1 investment bank who are actively seeking a Python Developer on a long-term contract basis. What you'll need to succeed Strong Python programming experience within Financial Services - Mandatory Good understanding of quantitative finance Good experience developing and optimising Python-based calculators and models. Strong experience developing high-performance More ❯

I am currently working with a London-based Tier 1 investment bank who are actively seeking a Python Developer on a long-term contract basis. What you'll need to succeed Strong Python programming experience within Financial Services - Mandatory Good understanding of quantitative finance Good experience developing and optimising Python-based calculators and models. Strong experience developing high-performance More ❯