18 back end developer jobs found

Methods is looking for a Back End Developer specialising in Java Spring Boot and GCP(Google Cloud Platform) to join our team within the private Sector Business unit. Rate: £490 inside IR35 Duration: 6 month initially Location: Hybrid; 3days/w in London office   Requirements:   Architectural Rebuild: Play a role in migrating and rebuilding our core architecture in Java Spring Boot to align with a composable, cloud-native landscape. Connector Development: Design and optimize technical connectors for a diverse mix of global channels, including generalist marketplaces, social commerce (eg, TikTok Shop), and quick-commerce (eg, Glovo, Deliveroo). Catalog Publication Flow: Refocus efforts on rebuilding the catalog publication flow, addressing technical complexities such as category mapping, product variant synchronization, and asynchronous marketplace APIs. Business Logic Migration: Collaborate on transferring complex Legacy...

Methods is looking for a Back End Developer specialising in Java Spring Boot and GCP(Google Cloud Platform) to join our team within the private Sector Business unit. Rate: £490 inside IR35 Duration: 6 month initially Location: Hybrid; 3days/w in London office   Requirements:   Architectural Rebuild: Play a role in migrating and rebuilding our core architecture in Java Spring Boot to align with a composable, cloud-native landscape. Connector Development: Design and optimize technical connectors for a diverse mix of global channels, including generalist marketplaces, social commerce (eg, TikTok Shop), and quick-commerce (eg, Glovo, Deliveroo). Catalog Publication Flow: Refocus efforts on rebuilding the catalog publication flow, addressing technical complexities such as category mapping, product variant synchronization, and asynchronous marketplace APIs. Business Logic Migration: Collaborate on transferring complex Legacy...

Senior Flutter Developer - Outside IR35 - Contract   A rare opportunity to join our fast-growing technology company selling high-value software development services. An ideal role for an experienced and dynamic developer who wants to be involved with an exciting and challenging project.   Must have   Several years of experience developing customer-facing mobile apps for both iOS and Android, using Flutter. Experience working as part of a team (including tools to support collaboration, such as git and user story management software) Experience working closely with other job roles, such as designers and product owners   Nice to have   Experience with mobile back-end development / Node Experience of CI/CD/DevOps for mobile apps Experience collaborating with clients or stakeholders, including clarifying requirements and presenting work at sprint demos Have experience delivering great outcomes for...

Senior/Lead Java Developer About Synechron: Synechron is a leading digital transformation consulting firm dedicated to delivering innovative technology solutions within banking, financial services, and insurance. We thrive on engineering excellence, collaboration, and a passion for cutting-edge technologies. We are seeking a highly skilled and experienced Senior/Lead Java Developer with 10+ years of hands-on experience in enterprise application development. The ideal candidate must possess strong expertise in core Java fundamentals, concurrency, and distributed systems , along with exposure to AI/ML-driven solutions . This role demands a deep understanding of data structures, system design, performance optimization, and scalable architecture , along with the ability to lead technical initiatives and mentor teams. This role is Inside IR35 contract Job Locatio n: London (Hybrid - 3 days in the offi ce) Key Responsibilities: Design, develop, and...

Freelance Data, AI and Operational Strategy Lead Next15 is a group of specialist businesses powered by data and technology, delivering measurable solutions for clients and lasting value for shareholders. We employ over 3000 people across 15 countries. Within our family of 12 consultancies, data and marketing services businesses, we focus on solving our clients' most complex growth challenges. Role overview We are looking for a freelance Data, AI and Operational Strategy lead to join our team in London. This is a short-term contract role to begin with, with the potential to evolve into permanent depending on the ongoing delivery requirements. Reporting into the Chief of Staff and working directly with the Senior Leadership team within Next 15 Group, this role plays a critical role in the execution of our strategy – Data powered growth fit for an AI future. Sitting at the intersection of data, technology, and people, this role blends hands-on data strategies with...

Role Summary Wagglyn is looking for an experienced QA Engineer / Test Lead to work with the existing engineering team on the testing and release readiness of its MVP trading platform. This is a hands-on contract role for someone who has tested complex financial or real-time systems before. It is not a generic web QA role and not a manual-testing-only role.   Scope The contractor will help define and execute the QA process across the front end, backend services, market data, execution flows, deployment environments and operational readiness. The role involves working with engineering, product and stakeholders to make sure releases are testable, repeatable and safe to promote through UAT and production-like environments. QA here is about proving the system behaves safely when data is live, services reconnect, orders are sent, risk state changes and deployments happen.   Profile ·      Hands-on QA...

Lean Process Expert – Client Onboarding (2-Month Contract) Hello! At MBC, we continue to grow and are currently looking for a Lean Process Expert to join an exciting short-term project. About MBC May Business Consulting is an international consulting company that provides advisory services in digital transformation, change management, efficiency, and control. We are fully client-focused and proactively involved in every engagement to maximize the value we deliver. We have offices in Spain and the United Kingdom. We work on international projects with financial institutions, fintechs, and startups. About the Role We are looking for an experienced Lean Process Expert / Business Process Improvement Consultant to support a 2-month project focused on improving and optimizing the client onboarding process within an international financial services environment. Responsibilities: Assess and analyze the current onboarding process to...

• Have experience of the full software development lifecycle and different software development models; will be expected to develop software using Bank methods, processes and standards. • Have in depth full stack development experience, methods and tools relating to the team’s area of responsibility including C#, .NET, SQL, React. • Have a good understanding of technical architectures. • Have in depth experience of tools that support the development process. This should include Git, Visual Studio and SQL Server Management Studio. • In depth experience working with relational databases • Be able to demonstrate a high level of professionalism, organisation and self-motivation • Have good interpersonal communication skills with an ability to interpret and present information to a variety of recipients using suitable modes of communication. • Have a consistent track record of forming and maintaining positive...

Role: Semantic Knowledge Architect Location: London Duration: Contract The Context: Thebes Group is a Optimisation Company. We are engaged on an AI transformation programme for a private equity group, focused exclusively on group-level operations, not fund management or investment activity. The programme is building AI agents to support day-to-day group operations: workflow, reporting, information management and operational decision-making. A foundation ontology and taxonomy already exists, and the organisation's data is mapped and manageable in scope. This is not a greenfield engagement. The Semantic Knowledge Architect joins an established delivery team that includes an AI engineer responsible for agent development. The two roles work in close partnership: the AI engineer builds and maintains the agents; this role owns the knowledge layer those agents depend on. The Role: Your responsibility is the quality, integrity and evolution of the semantic...

Salesforce Automation Test Engineer (Day Rate Contractor) Contract Type Day Rate Contractor Closing Date 2 July, 2026 Job Category Tech, Data and Digital Business Unit Systems and Infrastructure (UKT) Location London , United Kingdom Posted on 2 June, 2026 The opportunity  We are looking for a Salesforce Automation Test Engineer (Day Rate Contractor) in support of our IT modernisation efforts who will be required to drive forwards the multi level testing of key system developments. The role holder will be responsible for testing a catalogue of new features, working collaboratively with UK and Swedish development teams, whilst focusing on the timely delivery of agreed outcomes that meet both business and customer needs.  The successful candidate will have knowledge and extensive experience in automation testing, to enable a fast feedback loop for the development teams working on business-critical...

Blackstone& are a technical consultancy who specialise in digital transformation and complex technical deliveries. 15 years ago that meant Cloud adoption. 10 years ago it was DevOps. 5 years ago, SRE and platform engineering. We still cover all of that, but you guessed it, a lot of our work right now is AI adoption. And we mean actual AI adoption: in production, in Enterprises. Not just a vibe coded app on a local machine.   The pace and impact of each wave keeps accelerating, but we think successful adoption still comes down to two things: people and constraints. What does transformation actually look like inside the limits of an organisation, and how do we bring the people along for it?   Interested in helping us answer those questions for our customers?   WHAT YOU'LL BRING Core Skills Solid back-end engineering foundations. You write code that others can read, test, and build on Hands-on experience with AWS Bedrock,...

Contract Type Day Rate Contractor Closing Date 1 July, 2026 Job Category Tech, Data and Digital Business Unit Systems and Infrastructure (UKT) Location London , United Kingdom Posted on 1 June, 2026 The opportunity  We have a requirement for an experienced and enthusiastic SQL Developer (day rate contractor)  with good experience in Microsoft technologies. The successful candidate will join a small IT team (13 people, split between infrastructure and development) supporting the Wealth and Asset Management division of the Bank.  This is an excellent opportunity for a candidate who wishes to move into the wealth and investment management sector, joining a positive and dynamic team in which they will have every chance to pick up new skills, demonstrate their talent and make a significant contribution to the smooth operation of the business. Key responsibilities  The SQL developer will support the Wealth and Asset...

Contract Type Day Rate Contractor Closing Date 1 July, 2026 Job Category Tech, Data and Digital Business Unit Systems and Infrastructure (UKT) Location London , United Kingdom Posted on 1 June, 2026 The opportunity  As the Salesforce Admin you will work closely with the Salesforce Technical Lead and Lead Architect to help with the development and configuration of Salesforce platform and performing the day-to-day operations to maintain the platform by partnering with people across the business and broader IT team to deliver customer value through the extension of CRM services. Key responsibilities  Integral part of the Run/Ops team of Salesforce to help with BAU requests and maintain the Salesforce Platform Own the Salesforce tickets/incidents raised by the end customers and help with the build/resolution Work closely with the technical lead and architect to build enhancements on the existing Salesforce platform Ability...

Contract Type Day Rate Contractor Closing Date 26 June, 2026 Job Category Tech, Data and Digital Business Unit Strategy (UKTT-S) Location London, United Kingdom Posted on 27 May, 2026 Handelsbanken combines a long-established relationship banking model with secure, resilient, and customer-focused technology. Our technology teams enable the Bank’s decentralised way of working, delivering systems built for stability, trust, and long-term value. We are on a multi-year technology and digital transformation journey to enhance customer experience and improve how colleagues work together. By modernising platforms, simplifying processes, and better connecting data and systems, we help relationship teams focus on customers and less on complexity. Our decentralised culture extends to technology. Teams are trusted to take ownership, make informed decisions, and deliver sustainable, high-quality solutions. We value engineering...

Job Introduction We are seeking a versatile and proactive Information Security & Privacy Specialist to join Handelsbanken UK which is currently undergoing a major technology transformation programme. The successful candidate will a key member of the Secure Change Community of Practice, playing a critical role in ensuring that the Bank’s security and privacy processes, tooling and ways of working allow our Embedded Security Consultants to integrate security seamlessly into change initiatives from inception through delivery.  The Bank operates a model where information security consultants are embedded into workstreams acting as the security lead for that delivery team. An established Secure Change Community of Practice supports these embedded security consultants, facilitating knowledge sharing, owning & developing security and privacy processes/tooling, supporting embedded consultants to solve infosec and privacy problems and providing expert data privacy...

Company Jefferies, a global investment bank and securities firm, has served companies and their investors for over 60 years. Headquartered in New York City, with offices in more than 25 cities around the world, Jefferies provides clients with capital markets and financial advisory services, institutional brokerage, securities research and asset management. The firm is a leading provider of trade execution in equity, high yield, convertible and international securities for institutional investors and high net worth individuals.   Job Description: As part of the Equity Technology team, an opportunity exists for a consultant developer to join the small Securities Finance team to deliver functionality to support the UK/EU T+1 Regulatory initiative.   Key Responsibilities & Tasks: Development of the core in-house platforms. Owning specific projects or issues from start to finish. Working with colleagues and management to ensure...

Company Jefferies, a global investment bank and securities firm, has served companies and their investors for over 60 years.Headquartered in New York City, with offices in more than 25 cities around the world, Jefferies provides clients with capital markets and financial advisory services, institutional brokerage, securities research and asset management. The firm is a leading provider of trade execution in equity, high yield, convertible and international securities for institutional investors and high net worth individuals. Job Description: As part of the Equity Technology team, an opportunity exists for a consultant developer to join the small Securities Finance team to deliver functionality to support the UK/EU T+1 Regulatory initiative. Key Responsibilities & Tasks: Development of the core in-house platforms. Build distributed systems and enterprise-grade applications leveraging Java, Spring frameworks, and container technologies. Integrate with...

Job Introduction Handelsbanken UK is embarking on a digital transformation programme to enhance the customer experience through increased choice and flexibility around our digital channel proposition. Working closely with Group colleagues, the UK Bank will deliver an ambitious programme of work to the core online and mobile platforms that will afford improved functionality and a more seamless user experience. The automation Test Analyst supports of our IT modernisation efforts who will be required to drive forwards the multi level testing of key system developments. This role will be responsible for testing a catalogue of new features, working collaboratively with UK and Swedish development teams, whilst focusing on the timely delivery of agreed outcomes that meet both business and customer needs. This role is to enable a fast feedback loop for the development teams working on business-critical features. You will be looking after the test planning, the ability to develop a...