28 api developer jobs found in London

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...

Job Summary We are looking for an experienced ServiceNow Developer to support ongoing ServiceNow ITSM development, enhancement, integration, and platform support work. The ideal candidate will have 5–6 years of hands-on ServiceNow experience , with strong technical knowledge of ITSM modules , including Incident Management, Problem Management, Change Management, Request Management, Service Catalog, and CMDB-related processes . This is a remote UK-based contract role , operating Inside IR35 , with a day rate of up to £560 per day . The candidate must be currently residing in the UK and must have the legal right to work in the UK without sponsorship, such as UK citizenship or Indefinite Leave to Remain (ILR) . ServiceNow certifications are preferred but not mandatory. Strong practical knowledge and hands-on implementation experience are essential. Key Responsibilities The ServiceNow Developer will be responsible for designing,...

We’re on a mission to make real estate transactions smarter, faster, and friction-free.   Real estate is the world’s largest asset class , yet the legal processes and tools behind it remain slow, manual, and underinvested. Lawyers must review dense documents line by line and piece together information across silos, all while clients demand faster, more transparent due diligence.   That's where we come in. Orbital Copilot is the AI assistant built exclusively for commercial real estate law. Developed with former practicing real estate lawyers, it accelerates complex due diligence by up to 70% while delivering legal-grade precision.   We’ve just raised a $60m Series B to accelerate our UK/US expansion.   We're trusted by leading firms like Goodwin and BCLP to remove the busywork so legal teams can focus on what they do best: applying sharp legal judgment, delivering standout client service, and getting...

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...

Job Summary We are looking for an experienced ServiceNow Developer to support ongoing ServiceNow ITSM development, enhancement, integration, and platform support work. The ideal candidate will have 5–6 years of hands-on ServiceNow experience , with strong technical knowledge of ITSM modules , including Incident Management, Problem Management, Change Management, Request Management, Service Catalog, and CMDB-related processes . This is a remote UK-based contract role , operating Inside IR35 , with a day rate of up to £560 per day . The candidate must be currently residing in the UK and must have the legal right to work in the UK without sponsorship, such as UK citizenship or Indefinite Leave to Remain (ILR) . ServiceNow certifications are preferred but not mandatory. Strong practical knowledge and hands-on implementation experience are essential. Key Responsibilities The ServiceNow Developer will be responsible for designing,...

Freelance Hybrid Flexible Working We are seeking an experienced and knowledgeable Freelance AI Tutor to deliver high-quality, engaging training aligned to the Artificial Intelligence (AI) and Automation Practitioner Apprenticeship Standard. This role is ideal for an industry professional with strong commercial experience in AI, automation, data, or digital technologies, combined with proven teaching or training delivery experience. The successful candidate must be capable of equipping apprentices with current industry knowledge, practical technical skills, and professional workplace behaviours relevant to modern AI and automation roles. Role Overview You will deliver a blend of practical and theoretical training covering core AI and automation concepts. This includes machine learning fundamentals, data handling, automation technologies, and the ethical and responsible use of AI solutions within business environments. Training delivery will include:...

We are seeking a Business Analyst to focus on AI solutions. In this role, you will identify opportunities to enhance client journeys, improve financial outcomes, automate processes, and integrate AI capabilities within a greenfield project across key financial services functions. AI Business Analyst London x3 Days on-site £500-525pd Inside emagine is a high-end professional services consultancy and solutions firm Specialising in providing business and technology services to the financial services sector, we power progress, solve challenges and deliver real results through tailored high-end consulting services and solutions. We have created a culture of openness and integrity by building genuine and strong relationships and partnerships, enabling us to be uncompromising in our dedication in delivering the optimal service for our clients. Our commitment is not just towards our clients but we aim to foster a positive and equitable working environment with our...

Opening: Join the Mission We deliver secure, mission‑critical platforms and services for government and regulated organisation’s operating in high‑assurance environments. Our teams work at the intersection of cloud engineering, DevSecOps, and platform enablement, helping organisation’s adopt Google Distributed Cloud (air‑gapped GCP). This role offers the opportunity to shape automation‑first testing strategies for new cloud‑native platforms, influence tooling and quality standards, and ensure solutions are secure, resilient, compliant, and testable by design. Role Purpose As an Automation Test Engineer, you will be responsible for designing, building, and operating automated testing capabilities across platform and application delivery teams. You will: Define and implement test automation strategies aligned to IaC, CI/CD, and DevSecOps practices Select, evaluate, and trade‑off test tooling suitable for air‑gapped Google Distributed Cloud...

Role : Microsoft 365 & SharePoint Data Engineer Location: UK Type: Contract The Context: Thebes Group is an optimisation company specialising in AI-enabled transformation. We help organisations improve workflow, reporting, information management, and operational decision-making by combining process optimisation, knowledge architecture, semantic technologies, automation, and artificial intelligence. We are currently delivering an AI transformation programme for a private equity group, focused on enhancing group-level operations through intelligent workflows, improved information accessibility, executive reporting, and AI-driven operational intelligence. The Microsoft 365 and SharePoint environment is the operational backbone through which much of the group's information flows: documents, reporting, collaboration, and process. Getting that environment right, and connecting it properly to the AI and knowledge layers being built, is critical to the success of the...

  Job Title: Senior Full Stack Developer (contract) Location: London Hybrid. Travel to the London office 3 days a week Duration: 11 months Contract Start Date: ASAP *note client onboarding takes 6 weeks from offer 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.   The Role We are looking for Senior Full Stack Developers to work in the Technology and Transformation Team at Deloitte. You will work with one of our global financial services clients. This position...

  Job Title: Full Stack Developer (contract) Location: London Hybrid. Travel to the London office on 3 days a week Duration: 11 months Contract Start Date: ASAP *note client onboarding takes 6 weeks from offer 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.   The Role We are looking for an experienced Full Stack Developers to work in the Technology and Transformation Team at Deloitte. You will work with one of our global financial services clients. This position...

£450–£475 per day | Inside IR35 City London Province Greater London Country United Kingdom Postal Code EC1A Job Description About Scrumconnect Consulting   Scrumconnect Consulting is a UK national SME award-winning software development consultancy with over 300 consultants across the UK. We work with UK Public Sector clients to build impactful, award-winning digital services that improve millions of lives.   We take as much pride in our people, culture and work-life balance as we do in making services that improve millions of lives. Collaborative, entrepreneurial and dedicated to problem-solving, we bring the step change our customers need to sustain innovation.   About the Role   We are looking for an experienced Microsoft Dynamics 365 Developer to join a blended delivery team working on a large-scale public sector digital transformation...

Opening: Join the Mission We deliver secure, mission‑critical platforms and services for government and regulated organisation’s operating in high‑assurance environments. Our teams work at the intersection of cloud engineering, DevSecOps, and platform enablement, helping organisation’s adopt Google Distributed Cloud (air‑gapped GCP). This role offers the opportunity to shape automation‑first testing strategies for new cloud‑native platforms, influence tooling and quality standards, and ensure solutions are secure, resilient, compliant, and testable by design. Role Purpose As an Automation Test Engineer, you will be responsible for designing, building, and operating automated testing capabilities across platform and application delivery teams. You will: Define and implement test automation strategies aligned to IaC, CI/CD, and DevSecOps practices Select, evaluate, and trade‑off test tooling suitable for air‑gapped Google Distributed Cloud...

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,...

Principal Engineer London, United Kingdom | Posted on 02/06/2026 Scrumconnect Consulting  is a leading UK digital and technology consultancy specialising in delivering impactful, user-centred services for the public sector. We work with central government departments, agencies, and local authorities to build digital products and services that improve outcomes for citizens. With a team of engineers, architects, delivery professionals, and designers, we bring deep expertise in digital transformation, cloud technologies, and agile delivery. We are committed to engineering excellence, innovation, and creating an inclusive environment where everyone can thrive Role Overview We are seeking an experienced and highly skilled  Principal Engineer  to provide technical leadership, architectural guidance, and hands-on engineering expertise across complex digital products and platforms. As a Principal Engineer, you will be responsible for shaping...

  Job Title: Full Stack Developer (contract) Location: London Hybrid. Travel to the London office on 3 days a week Duration: 11 months Contract Start Date: ASAP *note client onboarding takes 6 weeks from offer 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.   The Role We are looking for an experienced Full Stack Developers to work in the Technology and Transformation Team at Deloitte. You will work with one of our global financial services clients. This position...

  Job Title: Senior Full Stack Developer (contract) Location: London Hybrid. Travel to the London office 3 days a week Duration: 11 months Contract Start Date: ASAP *note client onboarding takes 6 weeks from offer 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.   The Role We are looking for Senior Full Stack Developers to work in the Technology and Transformation Team at Deloitte. You will work with one of our global financial services clients. This position...

£450–£475 per day | Inside IR35 City London Province Greater London Country United Kingdom Postal Code EC1A Job Description About Scrumconnect Consulting   Scrumconnect Consulting is a UK national SME award-winning software development consultancy with over 300 consultants across the UK. We work with UK Public Sector clients to build impactful, award-winning digital services that improve millions of lives.   We take as much pride in our people, culture and work-life balance as we do in making services that improve millions of lives. Collaborative, entrepreneurial and dedicated to problem-solving, we bring the step change our customers need to sustain innovation.   About the Role   We are looking for an experienced Microsoft Dynamics 365 Developer to join a blended delivery team working on a large-scale public sector digital transformation...

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...