Wise★3.5 (42)· London

Lead a growing Solutions Engineering team in EMEA, providing technical consulting and product guidance to top-tier banks integrating Wise’s international finance products via REST API. Work with RESTful design, OpenAPI, OAuth2, and microservice architecture to architect integrations and influence the product roadmap.

Wise★3.5 (42)· London

Build backend

Netbuilder★3.0 (1)· London

Full-stack developers use Java, Spring Boot, React, TypeScript, Oracle, MySQL, Git, Jenkins, Spinnaker, Docker, and Kubernetes to build, enhance, and support scalable web applications, APIs, and enterprise platforms for NETbuilder, a digital solutions provider.

You will design and maintain automated UI, API, and service-level tests in TypeScript using Serenity/JS and Playwright, plus Python/pytest and C#/.NET. The role involves testing the ACE application and internal platform tooling for a decentralised AI platform optimising energy in data centres.

Lead Engineer using Vue (frontend), Django/Laravel (backend), AWS, Stripe/Salesforce/Netsuite integrations, SOAP, REST/OpenAPI, and project tools like JIRA, GitHub. Builds and maintains the user-facing commercial platform central to customer interaction. Manages and mentors junior developers, acting as project manager for releases.

Yapily★0.0· London

Lead a team building core microservices on Yapily's open banking platform, using Java, Spring Boot, and Kubernetes. Design REST APIs with OpenAPI/Swagger, oversee scalability and monitoring, and drive Agile delivery.

Apple★4.1 (14k)· London

Work with TypeScript, React, Webpack, Jest, Java, Spring, and Swagger/OpenAPI. You will help develop next-generation cloud services for iCloud Platform, enabling new applications and scaling existing ones like FaceTime, PushNotifications, Photos, and Backup.

Visa★3.9 (1.2k)· London

You will work with Java 11+, Spring Boot, AWS, Kubernetes, Kafka, ElasticSearch, Datadog, Docker, Terraform, OpenAPI, SQL, PACT, and CI/CD pipelines. As part of cross-functional squads, you will build and maintain a high‑availability, cloud‑native payments platform that processes over 50 billion USD in cross‑border transactions. You will lead technical direction, shape architecture, and mentor junior engineers.

Wise★3.5 (42)· London

You'll use Java (Spring), Kubernetes, AWS, RESTful APIs, Swagger, OpenAPI, OAuth2, and relational/non-relational databases like MySQL, PostgreSQL, MongoDB, and Cassandra. On the Wise Platform team, you'll provide technical consulting and integration support to global financial institutions and tech companies embedding Wise's international money movement products via API.

Citi★3.9 (21k)· London

This role architects Citi's strategic Release on Demand platform, using event-driven architecture and AI, while establishing its observability and end-to-end testing strategies. The Developer Enablement team builds internal SDLC automation tools for the bank's 30,000 engineers. As SVP and technical authority, this role leads a small, agile team and owns the technical roadmap.

Worldpay★3.0 (53)· London

You will work with Python, AWS, CI/CD pipelines, and ML tools like MLFlow, FastAPI, and containerization. As part of the Data Science Enablement team, you will own the technical delivery of production ML products and contribute to the shared ML platform for Worldpay’s payment solutions.

Visa★3.9 (1.2k)· London

You'll work with Java 11+, Spring Boot, AWS, Kubernetes, Kafka, Docker, and OpenAPI on distributed microservices powering Currencycloud's payment platform, which has processed over 50 billion USD in cross-border transactions. The role involves building and maintaining high-availability cloud-native applications within squads, with responsibility for technical direction, system design, and mentoring junior engineers.

LSEG★3.7 (402)· London

You'll design and scale data distribution systems delivering index data via APIs and cloud platforms, working with TypeScript, Python, SQL, AWS (Lambda, API Gateway, S3, Aurora), PostgreSQL, Apache Iceberg, Terraform, and GitLab. FTSE Russell (LSEG) builds next-generation distribution capabilities for institutional clients worldwide, requiring you to own system architecture, data modeling, and engineering standards as a hands-on senior engineer with strong technical leadership expectations.

Visa★3.9 (1.2k)· London

You'll build and maintain mission-critical foreign exchange trading services—pricing engines, risk management systems, and market data providers—for Currencycloud's API that has processed over 50 billion USD in cross-border transactions. The FX Routing and Aggregation team uses Java 11+, Spring Boot, AWS, Kubernetes, Kafka, and SQL databases to power real-time, high-throughput FX trading microservices handling billions in transactions, with mentoring responsibilities for junior engineers.

Zuora★3.6 (33)· London

You'll develop and scale Zephr, Zuora's AI-powered subscription experience platform for digital publishers, using Java (JDK 21+), Kotlin, JavaScript/TypeScript, React, and a microservices stack including Vert.x, Spring, Kafka, MySQL, and AWS/Kubernetes. You'll lead design and implementation of high-throughput APIs and backend solutions, mentor junior engineers, and contribute to technical standards for this multi-tenant, webscale application serving media companies' subscription management.

You'll lead a newly formed team defining canonical domain models, API schemas, and OpenAPI definitions across Swap's engineering organization, eliminating duplicated integration work. The role uses TypeScript/JavaScript and Node.js with REST/GraphQL expertise to establish governance pipelines for core eCommerce entities. You'll spend ~50% coding initially while building and mentoring a small team within an AI-native commerce platform serving global merchant operations.

You'll design and optimize distributed AI systems using Python, PyTorch, CUDA, and related tools, specializing in areas like inference optimization (KV cache, quantization, speculative decoding), large-scale training, post-training (fine-tuning, RLHF, DPO), or evaluation frameworks. Nscale builds a vertically integrated GenAI cloud platform spanning data centers, software, and applications. This hands-on role requires 5+ years in production ML/distributed systems and deep expertise in at least one core area within hyperscaler or AI lab environments.

EPAM Systems★3.8 (703)· London

You'll work with Python, LLMs, and multi-agent orchestration frameworks including LangGraph, CrewAI, and AutoGen to design and deploy Generative AI and Agentic AI solutions. The role involves building RAG pipelines, implementing multi-step agent workflows, and developing production-grade microservices integrated with enterprise systems across multiple industries. You'll apply observability tools like Langfuse and Grafana while working within EPAM's Data & AI Practice, which delivers AI applications that transform client capabilities.

LSEG★3.7 (402)· London

You'll work with Java 17+, Spring Boot, Docker, Kubernetes, Kafka, GitLab, PostgreSQL, and AWS services (Aurora, MSK, S3) to build event-driven microservices with blockchain integration capabilities. LSEG, a global financial infrastructure provider, is launching a new cloud-based post-trade market infrastructure service, and you'll contribute across the full engineering lifecycle while collaborating with cross-functional teams in an agile environment.

LSEG★3.7 (402)· London

You'll work with Java 17+, Spring Boot, Docker, Kubernetes, Kafka, PostgreSQL, and AWS services (Aurora, MSK, S3) while building event-driven microservices for a new cloud-based blockchain infrastructure platform for LSEG, a global financial markets infrastructure provider. The role requires blockchain integration expertise including smart contracts, interoperability protocols, and cross-chain communication. You'll report to the Director of Technical Delivery and lead engineering excellence across solutioning, design, coding, and testing in an agile environment.

Postman★4.0 (1)· London

You will work with REST and GraphQL APIs, API lifecycle management tools like Postman and OpenAPI, CI/CD automation, and cloud platforms (AWS, Azure, GCP). Postman is an API platform used by 45+ million developers and 500,000 organizations to design, build, test, and manage APIs across their lifecycle. As an Enterprise Solutions Engineer, you'll support UK and Ireland enterprise customers through technical discovery, proof-of-concept delivery, and collaboration with Sales, Product, and Customer Success teams.

Postman★4.0 (1)· London

You'll work with REST and GraphQL APIs, API lifecycle management tools like Postman and OpenAPI, CI/CD automation, and cloud platforms (AWS, Azure, GCP) to support Postman, the world's leading API platform used by 45+ million developers and 500,000 organizations. In this customer-facing role, you'll lead technical discovery sessions, design proofs of concept, and deliver workshops for enterprise clients while collaborating with Sales, Product, and Customer Success teams to drive adoption and gather insights that influence product roadmap decisions.