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Software Engineer - Java /Back End Hybrid - 2 days per week in the office Java, PostgreSQL, API We are looking for an experienced Back End Developer with excellent Java, PostgreSQL and API skills due to software development moving from an outsourced model to in-house. Working alongside the development team you will: * Be highly involved with knowledge transfer, including code walkthroughs, pairing sessions, and documentation reviews with the outgoing external team. * Gain understanding of the current Java application architecture - service boundaries, dependency injection patterns, build system, and deployment configuration. * Design and implement new back-end features, enhancements, and bug fixes in Java, following agreed coding standards and architectural principles. * PostgreSQL data model - schema design, migration management (Flyway/Liquibase), indexing strategy, and query optimisation. * Design, document, and maintain RESTful and/or GraphQL APIs, ensuring consistency, versioning, and thorough OpenAPI/Swagger documentation. * Identify, catalogue, and systematically address technical debt in collaboration with the wider Your background and experience will include * Great communication skills, able to contribute to future roadmaps for the products * Excellent Java development experience (Java 11+) in a production environment - including Spring Boot, dependency injection, and RESTful API design. * PostgreSQL skills: schema design, complex query writing, index optimisation, and migration tooling (Flyway or Liquibase). * Experience designing and documenting APIs using OpenAPI/Swagger * Proficiency with build tools - Maven or Gradle - and a modern Java development workflow. * Understanding of software design principles (SOLID, DRY, Clean Architecture) * Familiarity with containerised deployment environments (Docker, Kubernetes) from a developer perspective. * Understanding and interest in AI coding assistants - Claude Code, GitHub Copilot, Cursor, or equivalent

We’re looking for an API Product Sales Executive to drive adoption of our payments-as-a-service offering with enterprise customers.

A fast-growing technology firm in the UK is seeking a Senior Offensive Security Analyst to focus on API security and perform penetration testing on web applications.

We’re looking for an API Product Sales Executive to drive adoption of our payments-as-a-service offering with enterprise customers.

Crane Venture Partners is looking for a founding sales hire for AspireX, focused on shaping the sales strategy and building a pipeline in cross-border payments and FX. The ideal candidate will possess a strong understanding of API or infrastructure sales within the fintech sector and will drive mark

We’re looking for an API Product Sales Executive to drive adoption of our payments-as-a-service offering with enterprise customers.

A leading consulting firm is seeking a Lead MuleSoft Developer to oversee the delivery of APIs and integrations on the MuleSoft Anypoint Platform. This role requires extensive MuleSoft development experience and certifications in MuleSoft, with a strong focus on enterprise-scale integration and a so

In this role, you will design secure architectures, oversee external API integration, and ensure compliance with UK Open Banking standards. The ideal candidate will have extensive experience in API management and microservice deployment. A leading technology consulting firm is seeking a Solution Arc

NET, SQL, API integration, Kubernetes, Docker. Leading the design, development, maintenance and integration of their APIs with 3rd party vendors.

The role involves developing new product features, participating in system design, building APIs, and providing support for bug fixes.

Strong experience with API management platforms such as MuleSoft, Apigee, Kong or AWS API Gateway. Deep knowledge of REST API design principles including Swagger/OpenAPI or RAML specification authoring. Define end‑to‑end API architectures including authentication, authorization flows, data model

We are looking for a driven and technically strong individual to join the Trading Engine team as a Senior API Solutions Engineer. This role combines hands‑on software development with a client‑ and community‑facing focus centered around the Binance Trading API. You will be part of a small, fas

You will be working on the current and future rendering APIs used by PlayStation games, as well as the hardware underpinning them. ATG is granted a high degree of trust and autonomy in shaping the graphics software stack and we are looking for people who are passionate about carrying this forward. E

As our Senior Product Marketing Manager - API & AI you’ll own product marketing for GWI’s API ecosystem and our rapidly growing portfolio of AI products — including Agent Spark and our Model Context Protocol (MCP) integrations. Ability to position complex, evolving products (AI agents, integra

Candidates should have a degree in Computer Science and strong skills in relational databases and APIs.

Senior Site Reliability Engineer (Application / API Focused). You will work directly with product and engineering teams across customer-facing platforms (web, mobile, payment journeys, APIs) to improve reliability, resilience, and service behaviour in production. Embed SRE practices across API and m

A leading utility provider in Greater London is seeking a Software Engineer to join their Telco Experience Team.You will design and implement backend systems using Go, while collaborating with various stakeholders to deliver customer-focused features.This role emphasizes teamwork and effective commu

The role involves deploying and managing applications in GCP, designing RESTful APIs, and implementing automated testing strategies.

A leading financial services company is seeking a Senior Business Analyst to drive the success of digital product initiatives.You will capture and prioritize requirements, act as a liaison between teams, and ensure effective project delivery.The ideal candidate will have over 5 years of experience i

A leading athletic footwear company in Greater London is seeking a Senior Site Reliability Engineer to own the architecture and performance of global entry points.In this hands-on role, the candidate will troubleshoot advanced network bottlenecks and design future content delivery strategies.The ide

A tech integration company is seeking an expert to integrate the Workday API with another system for data synchronization. The ideal candidate has strong experience with Workday API and proven success in system integration.

A leading trading firm is seeking a Staff API Trading Engineer to design and build high-performance trading APIs. The ideal candidate has proven API experience, a strong background in OpenAPI, and familiarity with Rust or similar languages.

The ideal candidate will have expertise in API design and a good understanding of modern development workflows, including RESTful services and containerized environments.

Strong knowledge of Cypress, API testing, and excellent communication skills are essential.

Well‑Tooled: Own the development of our self‑service developer portal, streamlining processes for credential management and API monitoring. We’re looking for an experienced Engineering Lead to join our API Experience team. You’ll lead and manage a team of engineers building the tooling and i

A cloud services company in Greater London is seeking a Senior Software Developer in Test to enhance automation frameworks for scalable services.The ideal candidate will have at least 8 years of software testing experience and 5 years in test development with strong Java skills.Responsibilities incl

A leading technology company is seeking a Senior Customer Success Manager to empower businesses through API orchestration. Ideal candidates will have over 7 years in customer-facing roles with a strong understanding of APIs and project management skills.

This remote role requires expertise in Cypress, API testing with Rest Assured or Postman, and performance testing.

API Versioning—Backwards compatibility and deprecation across the /v2 surface. Redesign normalization for schema evolution—Providers change APIs. Harden mobile SDK data path—Apple Health and Health Connect are fundamentally different from cloud APIs.

The role includes designing scalable REST APIs and databases while fostering a collaborative environment.

A leading compliance provider is seeking two Integration Managers for a hybrid role based in London.The ideal candidates will lead client integrations, assist commercial teams, and provide support post-go-live.Qualifications include a degree in information/computer science and over 2 years of integr

A leading UK university in Lancashire seeks a Senior Developer to join its Enterprise Operations team.The successful candidate will develop full stack applications in C#.NET Core, support existing products, and lead on cloud migration projects.This role includes the opportunity for flexible hybrid w

In this role, you will design, develop, and maintain Oracle applications, write high-performance SQL and PL/SQL code, and integrate RESTful APIs.

The API has over 60 customers with an average ACV in the multiple 5-figure range, and trusted data used by companies like Clay and New York Times. The API product has grown to 7-figures in ARR, and we are investing more in the product, data infrastructure, and team. We are looking for a smart, drive

Hiya in London is seeking a full-stack engineer to own end-to-end features across its products including API, iOS, and Android.

Candidates should have strong experience in technical sales, including SaaS integrations and API troubleshooting, along with excellent communication skills.

A leading tech service provider in Greater London is looking for a Technical Support Engineer who will act as the technical anchor for support operations.This role requires proficiency in troubleshooting complex connectivity issues and assisting Tier 1 support teams.The ideal candidate will possess

This role requires managing the pre-sales lifecycle with customers, optimizing API security processes, and interacting with stakeholders.

The organisation is looking for a Technical Product Owner specifically within the financial services industry to own the roadmap of the critical replatforming of our organisations payment system - for this you will have to have deep knowledge of the financial services / banking be a highly experienc

Design end‑to‑end solutions leveraging Viator’s APIs to address partner needs, optimise performance with the objective of optimising the commercial success of our partners. Support partners to design an implementation roadmap pre and post development to leverage Viator's API to build products

The ideal candidate should have strong backend experience, particularly in API design and cloud infrastructure. A leading travel technology company in London is seeking a Senior Software Engineer to design and build scalable APIs and backend systems.

You have experience of building event‑driven systems and public APIs. Senior Backend Engineer / Developer (TypeScript Node API) London / WFH to £100k.

A leading digital recruitment firm in the UK is seeking a Digital Recruitment Specialist for a 6-month contract offering £400 to £425 per day.This fully remote position requires strong skills in Ruby, Selenium, and various testing methodologies for government digital services.The successful candid

A leading consulting firm in Greater London is seeking a Solution Architect to drive transformation in API channel capabilities and Open Banking initiatives. You will lead API architecture designs, ensuring secure and scalable solutions, while collaborating with engineering teams. The ideal candidat

A leading payment solutions company in the UK is looking for a Product Director to build and lead a high-performing team responsible for delivering innovative payment products.This full-time role requires developing strategies in collaboration with senior leadership, ensuring effective product launc

Required skills include API expertise, fluency in English, and strong consultative and communication abilities.

Moody's seeks an Associate Product Consultant to lead implementation projects for its Data Apps Solutions, focusing on RESTful APIs and ERP connectors.

Integration Engineer - API & Enterprise Systems (Contract). Strong experience with REST APIs, OAuth2, webhooks, and asynchronous messaging.