Lead the EMEA Solutions Engineering team for Wise Platform, working with REST APIs (RESTful design, OpenAPI, OAuth2) and microservices architecture. The team helps top-tier banks and tech companies integrate Wise’s international finance products via their public API, providing post-sale technical consulting. You will build and mentor a high-performing technical delivery team, defining goals aligned with Wise Platform’s objectives.

Use Selenium, Playwright, Postman, JMeter, Jira, SQL, Git, Jenkins, and Azure DevOps to design and execute manual and automated tests. Validate merchant onboarding, payment processing, settlements, terminal management, and Lloyds Accept application flows across web, mobile (iOS/Android), and API systems.

Lead UI Developer role using TypeScript, React, RxJS, WebSockets/SSE, GraphQL, Protobuf, Flatbuffers, Jest/Vitest, React Testing Library, Playwright, and AG Grid. You will own the front-end architecture for a real-time Single Dealer Platform used by Sales, Trading, and institutional clients globally, building low-latency trading applications for market data, pricing, RFQ, and trade capture.

You will build scalable server-side logic using JavaScript, TypeScript, and Node.js in a microservices architecture on AWS with Kubernetes, Terraform, Kafka, and Snowflake. You will join the MMH team within the Martech domain, which orchestrates campaign delivery across email, push notifications, and personalised content for all Sainsbury’s Group brands. The team includes 7 engineers.

Develop backend services using Node.js, Python, Java, C#, PHP, and Ruby on Rails, with databases including MySQL,

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.

You will work with AWS, Azure, GCP, Terraform, Kubernetes, GitOps tooling, service mesh, cloud networking, and event-driven architecture. This role supports a public sector project building multi-cloud infrastructure and reusable platform capabilities.

Koinly★3.0 (1)· London

Work with React 19, TypeScript, TanStack (Router, Query, Table), Radix UI, Mantine, Tailwind CSS v4, Vite, Vitest, Storybook, Highcharts, Sentry, Bun, and RabbitMQ on a data platform that reconciles crypto transactions and tax obligations for Koinly’s web application, with a React Native mobile app joining scope later.

State Street★3.4 (3k)· London

Work with FIX, Web Services (SOAP), VBA/SQL, and AI technologies. The role sits within State Street's GlobalLink suite, which provides FX electronic trading platforms (FX Connect, Currenex) for execution, workflow automation, and post-trade processing. As an Integration Analyst (AVP), you implement FIX-based workflow solutions for buy and sell-side clients.

You will work with Java, Selenium, RestAssured, Gherkin, and Jira/Xray to design and maintain automated test frameworks. This cross-functional Agile squad develops complex healthcare software systems that support Genomics England’s genomic medicine and research initiatives for the NHS.

QA Engineer role using **Python** for test automation, with **Gherkin**-based test cases, **Jira/Xray**, and **CI/CD pipelines**. You will build and maintain automated test frameworks covering UI, API, integration, and regression testing for the software systems that underpin Genomics England’s genomic healthcare and research mission.

You will build and operate a Kubernetes platform on Azure using Terraform, GitOps, service mesh, and observability tools like Grafana and OpenTelemetry. The platform underpins AI and automation services for a large-scale enterprise, supporting multiple engineering teams. This is a hands-on role covering infrastructure as code, CI/CD, networking, and platform reliability.

Senior Software Engineer designs and maintains backend services and APIs using Java, Python, and Node.js, working with microservices and Spring Boot. The role involves building REST, GraphQL, and SOAP APIs, using relational and NoSQL databases (MySQL, PostgreSQL, Oracle, Redis), and performing cloud-native development in AWS environments. This position supports financial systems and integrations within the leading global business aviation company, Vista.

As Principal SDET, you will lead quality engineering using C#, Playwright, and Selenium for test automation across UI, API, and integration layers. You will drive the quality strategy for a financial services organisation undergoing a major business and technology transformation. This is a senior technical leadership role, not managing a specific team size.

Build and support scalable enterprise integrations using Workato, APIs, webhooks, REST, SOAP, GraphQL, OAuth, JSON, XML, SQL, JavaScript, Python, and Workato formulas. Integrations span finance, HR, CRM, document management, and analytics platforms. No team size specified.

The role involves C#, ASP.NET Core, async/await, Entity Framework Core, Git, and optionally Azure DevOps, Docker, and Playwright. You will build backend services, integration layers, and AI API integrations for large-scale websites, apps, and platforms delivered to global brands.

Wise★3.5 (42)· London

Build backend

Deliveroo★3.3 (1.5k)· London

Work with Kubernetes, AWS, Terraform, Go/Python, and CI/CD tools like GitHub Actions. Join the Infrastructure team within Core Engineering to build and operate the foundational compute and cloud platform that enables engineering teams across Wolt, Deliveroo, and DoorDash to develop and ship software at scale.

This Staff Solutions Engineer role involves using Docker, Kubernetes, NGINX, HTTP, AWS, Postgres, Cassandra, and Linux to support Kong’s API Management & Connectivity solutions. The engineer leads the technical sale cycle with Enterprise & Strategic accounts, handling demos, proof-of-concepts, and customer onboarding.

Cognizant★3.8 (17k)· London

Work with ServiceNow modules (ITSM, ITOM, ITAM, HRSD, CSM, GRC, SecOps, App Engine), integrations (REST, SOAP, APIs, MID Servers), scripting (JavaScript, Glide, Flow Designer), CMDB, CSDM, and telecom OSS/BSS systems using TM Forum Open APIs. Architect ServiceNow solutions for telecommunications, defining platform roadmaps and leading cross-module implementations to align with OSS/BSS needs and enterprise governance.

HCLTech★3.7 (11k)· London

Work with React, TypeScript, HTML, CSS, JavaScript, Redux, WebSockets, SSE, REST APIs, micro-frontends, and unit testing tools like Jest/React Testing Library. The role delivers high-availability, low-latency UI applications, ideally for financial services or trading platforms.

Work with TypeScript, Python, Node.js, Playwright, Cypress, WebdriverIO, Docker, GitHub Actions/GitLab CI, bash, and Jira to build and maintain test automation frameworks and CI pipelines for Connected TV devices.

You will work with Java, JavaScript, Python, or C#; open-source frameworks like Cypress, Karate, PlayWright, or Selenium; CI/CD pipelines in Azure DevOps; and JMeter for performance testing. As part of an agile team, you’ll help clients achieve business transformation goals through automated and manual testing.

You will work with Docker, Kubernetes, NGINX, HTTP, AWS, Postgres, Cassandra, Linux, DevOps/CI/CD pipelines, and API Gateway or Service Mesh. As a Solutions Engineer, you support field sales by leading technical sale cycles for Kong’s API Management & Connectivity solutions. The company builds Kong Konnect, a unified API and AI platform for securing and managing APIs and AI models.

You will work with React, TypeScript, HTML, CSS, JavaScript, WebSockets, SSE, REST APIs, Redux, micro-frontends, SPA, React Testing Library/Jest, and optionally Playwright or Cypress. The role involves building time-critical, high-availability, high-performance UI applications, with an advantage for experience in financial services or trading platforms.