169 software contractor jobs found in London

20 hours ago Senior Software Engineering Contractor About the job   Aspect Capital is an award-winning systematic hedge fund based in London, UK that manages over $8 billon of client assets, where technology plays a critical role in the success of the business.   We are looking for a Senior Software Engineering Contractor to join our Software Development team to work on our Software Development platform for 12 months.   Job requirements: 5+ years of enterprise Java development experience Experience with managing technical projects e.g. planning timelines, milestones and deliverables Strong enterprise Java (with Spring) experience Working proficiency of Python and Javascript Experience with Maven, Docker and CI pipelines   Job responsibilities: Aspect’s Software Development Team are a team of 12 who develop and support the main trading software for Aspect. This ranges from front office...

Aspect Capital is an award-winning systematic hedge fund based in London, UK that manages over $8 billon of client assets, where technology plays a critical role in the success of the business.   We are looking for a Senior Software Engineering Contractor to join our Software Development team to work on our Software Development platform for 12 months.   Job requirements: 5+ years of enterprise Java development experience Experience with managing technical projects e.g. planning timelines, milestones and deliverables Strong enterprise Java (with Spring) experience Working proficiency of Python and Javascript Experience with Maven, Docker and CI pipelines   Job responsibilities: Aspect’s Software Development Team are a team of 12 who develop and support the main trading software for Aspect. This ranges from front office trading, to back and middle office. This core project entails working on Aspect’s Software...

Aspect Capital is an award-winning systematic hedge fund based in London, UK that manages over $8 billon of client assets, where technology plays a critical role in the success of the business.   We are looking for a Senior Software Engineering Contractor to join our Software Development team to work on our Software Development platform for 12 months.   Job requirements: 5+ years of enterprise Java development experience Experience with managing technical projects e.g. planning timelines, milestones and deliverables Strong enterprise Java (with Spring) experience Working proficiency of Python and Javascript Experience with Maven, Docker and CI pipelines   Job responsibilities: Aspect’s Software Development Team are a team of 12 who develop and support the main trading software for Aspect. This ranges from front office trading, to back and middle office. This core project entails working on Aspect’s Software...

  Department: Technology Team: Group Technology Location: London with hybrid working, and travel required Position type: Day Rate Contract (Inside IR35), until end of 2026   What the hiring manager says   “The move toward 5G, private networks, and cloud‑native architectures represents one of the most significant transformations our industry has ever seen. This role sits at the heart of that journey, working with global operators, vendors and ecosystem partners to drive interoperability, scale adoption, and genuine technological progress. Richard Cockle, Head of Connected Community, GSMA Technology   About the Team   We are a team of technical experts that assists the mobile industry in its generational (5G) and digital transformation. This involves understanding the industry drivers, collaborating with; operators, vendors and other actors to provide technical recommendations for wider industry adoption. Our...

Who Are We? Xcelirate develops technologically-advanced platforms which are accessed by thousands of users every minute! We are proud to offer a workplace where the sharpest developers come together to strategically plan and swiftly execute practices which see us maintain our existing market dominance and attain global expansion. We owe our success to our customers who have seen us grow across a decade, and our talented team who have made that growth possible!   What are we looking for? We are looking for a Senior Technical Writer who will own and maintain the single source of truth for how the products we build and operate actually work. You will be responsible for a living, authoritative record of how the products behave, how the business uses them, and what really happens when someone presses a button or a workflow runs. You are suitable for the role if you've also held positions such as Systems Analyst or Knowledge Manager. Most of what...

    Job description   Job Title: AI Engineer (contract) Location: London Hybrid. Travel to the London office 2 days a week Duration: 6 months Contract Start Date: March 2026   Deloitte Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte.   The Role We are looking for a AI Engineer to join our Data and AI Team supporting internal service delivery transformation projects across Tax and Legal. You will be a Python and Azure expert in designing and building cutting-edge...

Contract - SAMPro Project Manager Job description Job Title: SAMPro PM Location: Remote Target Start Date: ASAP Contract duration : 6 months Day Rate: Competitive (Inside IR35) Deloitte Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte. Role Purpose We are looking for a seasoned Subject Matter Expert (SME) PM to lead the end-to-end migration from legacy platforms (SNOW License Manager / Flexera) into ServiceNow SAMPro. This is not a ʺchecklist ʺ PM role; we require a technical project lead who understands the architectural nuances of ServiceNow 's ITSM and the SAMPro modules, the complexities of...

    Job description Job title : Lead DevOps Engineer (contract) Duration : 6 months Target Start Date : ASAP Location : Cardiff Hybrid - travel to Cardiff office on an adhoc basic and for training on week 1. Rate : Competitive, inside IR35   Deloitte Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte.   About the role: We are looking for a Lead DevOps Engineer to join the Enabling Functions team. Reporting to Tech lead, you will be responsible for leading, mentoring and guiding a...

  Department: Technology Team: Group Technology Location: London with hybrid working, and travel required Position type: Day Rate Contract (Inside IR35), until end of 2026   What the hiring manager says   “The move toward 5G, private networks, and cloud‑native architectures represents one of the most significant transformations our industry has ever seen. This role sits at the heart of that journey, working with global operators, vendors and ecosystem partners to drive interoperability, scale adoption, and genuine technological progress. Richard Cockle, Head of Connected Community, GSMA Technology   About the Team   We are a team of technical experts that assists the mobile industry in its generational (5G) and digital transformation. This involves understanding the industry drivers, collaborating with; operators, vendors and other actors to provide technical recommendations for wider industry adoption. Our...

Who Are We? Xcelirate develops technologically-advanced platforms which are accessed by thousands of users every minute! We are proud to offer a workplace where the sharpest developers come together to strategically plan and swiftly execute practices which see us maintain our existing market dominance and attain global expansion. We owe our success to our customers who have seen us grow across a decade, and our talented team who have made that growth possible!   What are we looking for? We are looking for a Business & Technical Documentation Analyst who will own and maintain the single source of truth for how the products we build and operate actually work. You will be responsible for a living, authoritative record of how the products behave, how the business uses them, and what really happens when someone presses a button or a workflow runs. Most of what you’ll be documenting will not arrive cleanly packaged. It will exist as half-remembered...

Basic information Location London Business Line Tax & Legal Job Type Contract Date published 09-Feb-2026 Req # 22184 Job description   Job Title: AI Engineer (contract) Location: London Hybrid. Travel to the London office 2 days a week Duration: 6 months Contract Start Date: March 2026   Deloitte Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte.   The Role We are looking for a AI Engineer to join our Data and AI...

Business Readiness Training Developer X 2 - Day Rate Contractor The Business Readiness Training Developer will work with the Business Readiness Training Team on a large-scale transformation programme implementing Salesforce and other system and business process changes, to design and develop training material for consumption by SmartestEnergy end users. The role will focus specifically on the development of software simulations, e-learning modules, process documentation for end users, training briefing packs and other training materials as required. This temporary role is crucial in ensuring that the business is adequately prepared for programme changes through effective training content amidst tight timeframes.

Business Analyst - Contractor About CLS: CLS is the trusted party at the centre of the global FX ecosystem. Utilized by thousands of counterparties, CLS makes FX safer, smoother and more cost effective. Trillions of dollars ' worth of currency flows through our systems each day. Created by the market for the market, our unrivalled global settlement infrastructure reduces systemic risk and provides standardization for participants in many of the world 's most actively traded currencies. We deliver huge efficiencies and savings for our clients: in fact, our approach to multilateral netting shrinks funding requirements by over 96% on average, so clients can put their capital and resources to better use. CLS products are designed to enable clients to manage risk most effectively across the full FX lifecycle - whether through more efficient processing tools or market intelligence derived from the largest single source of FX executed data available to the market. Our ambition...

About Us Zero Plus Ltd is a trusted technology services partner to the UK Government and corporate sectors. We deliver secure, reliable, and scalable solutions to multiple UK public sector organisations.   Supporting more than 20,000 end users, our mission is to enable secure cloud and end user services guided by our Zero Trust Security Model. Our teams specialise in Identity Verification, Managed Endpoints, Threat Detection, Secure Remote Access, and Adaptive Security Policies, balancing exceptional user experience with enterprise grade security.   We operate under an ISO/IEC 27001 certified ISMS and an ITIL aligned service management framework, ensuring integrity, resilience, and operational excellence.   Why join Zero Plus? Great Location: Our modern offices in the Strand, London, place you at the heart of one of the city’s most vibrant areas, surrounded by history, culture, and excellent transport links High Impact...

Who Are We? Xcelirate develops technologically-advanced platforms which are accessed by thousands of users every minute! We are proud to offer a workplace where the sharpest developers come together to strategically plan and swiftly execute practices which see us maintain our existing market dominance and attain global expansion. We owe our success to our customers who have seen us grow across a decade, and our talented team who have made that growth possible! What are we looking for? You're a principal-level full-stack engineer. You haven't just been around the block - you helped decide which blocks were worth building, and which ones should've been bulldozed early. At this point, programming languages don't really impress you anymore. You treat them as tools that translate intent into something a compiler or interpreter can run, choosing them pragmatically, discarding them without nostalgia, and never confusing syntax or novelty with actual progress. You've been around...

Senior Software Engineer - Identity & Authentication (Backend) - Contractor About the Role In the European Client Identity team, we are building and operating Vanguard’s authentication and MFA platform used by hundreds of thousands of clients across the UK and Europe. This is a hands-on senior backend role focused on designing, building, deploying, and operating cloud-based identity services. You will work in a highly regulated environment where security, reliability, and operational discipline matter. You don’t need to be an identity expert on day one — but you do need strong backend fundamentals, cloud experience, and a responsible, methodical engineering mindset.   This is a contractor role, available for up to 12-months.   In this role you will Build and evolve backend services that support login, MFA , and client authentication Design and implement REST APIs using NestJS / TypeScript...

The Ministry of Defence (MOD) is a central government department with a mission to protect our country and provide the ultimate guarantee of its security and independence, as well as helping to protect its values and interests abroad.   The MOD is one of the biggest public procurement organisations in Europe and the single largest customer for UK industry. It currently manages approximately £20 billion of spend on capital investments in equipment and infrastructure every year. Over the next decade the MOD is committed to spending over £190 billion on equipment and support. The MOD's customers include both the armed forces and national security agencies, and it has a diverse range of requirements, including military fighting vehicles, education services, nuclear submarines and facilities management.   The MOD's aim is to provide its armed forces with the best capabilities to enable them to protect the UK's security and advance national interests,...

Joining a new project Ideally have worked on Financial Services Projects before (Payments would be great) Emphasis on Architecture over Development (Must have a solid Development Background) Must be comfortable sitting in client meetings and advising Start date ASAP Duration 3 months (Likely to extend) 3 days / week in person working (London) Immediate Interviews   The best bit about Red Badger is, of course, the team. We are really proud of our people; we support and learn a lot from each other; we work really hard but have fun doing it. We are a diverse group made up of 22 different nationalities, speaking 17 different languages.   Our 3 founders, Dave, Cain and Stu, who have considerable tech and consultancy experience and still own 100% of the company. We've been consistently profitable and have grown responsibly from the beginning.   We are based at Old Street in the heart of ʺtech cityʺ...

We are looking for a PoweBI Consultant for a 2 month contract. The role can be home based but we would prefer someone who is able to travel to our offices in London.   **Eligible Candidates must have SC clearance.**   **No Agencies please**   Role overview We’re looking for an experienced Power BI Consultant (Contract) to deliver high-quality, client-facing KPI reports embedded within our software products using Power BI Embedded. You’ll take ownership of the reporting layer end-to-end: translating business requirements into robust semantic models and reports, shaping data where needed, and building accurate, performant dashboards aligned to existing wireframes. This work supports one of our major clients, so accuracy, consistency, and strong QA discipline are essential.     Key responsibilities Build and enhance Power BI reports/dashboards in line with provided wireframes and agreed KPI...

Contract opportunity for a Software Engineer to join GlobalLogic in London. Role is Hybrid and Inside IR35. Essential experience: React/Node/TypeScript as well as Terraform and pipelines. The role responsibilties will include: Creating intuitive web experiences by building and evolving Backstage plugins and other React applications. Designing and operating scalable TypeScript and Node.js back-end services on Linux and K8s Embedding unit, integration and end-to-end tests and managing automated CI/CD pipelines, using GitHub, Jenkins and Argo CD. Identifying workflow friction, prototyping solutions quickly and iterating with stakeholders across the organisation. We are looking for the following technical experience: Proven experience delivering end-to-end systems with React, TypeScript, and Node.js Practical knowledge of Backstage (plugin development, software catalogue, TechDocs) Ability to design scalable, resilient, and cost-efficient distributed...