Work with Java, GitHub Copilot, Devin.AI, Citi Squad, Stylus Workspaces (Gemini, OpenAI, Claude, Llama), Docker, Kubernetes, and CI/CD. Build high-performance, real-time FX risk management systems for a greenfield platform with a 10+ year strategic commitment. As a VP, lead end-to-end delivery and technical direction.

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.

Koinly★3.0 (1)· London

You will work with TypeScript on Bun, RabbitMQ, Redis, PostgreSQL, Vitest, Sentry, and Rust. The team owns the distributed data-processing backend that ingests, normalizes, and reconciles on-chain and exchange data for Koinly’s crypto tax calculation product.

Equinix★3.7 (391)· London

You will design and ship LLM-powered agents and the platform they run on using Python or TypeScript, APIs, microservices, event-driven architecture, Git, CI/CD, and cloud platforms, with tools like MCP and A2A. The Equinix Incubation team builds agentic systems that automate the software delivery lifecycle end to end—from intake and business case through code, test, release, and value tracking—with humans directing every gate.

Use Selenium with C# to build and maintain automation frameworks, create regression suites, and perform functional/integration testing. As the first UK-based QA for a financial services firm's growing European technology team, you'll collaborate with an Agile squad and a US QA team.

You'll work full-stack with Python/Django, React, PostgreSQL, and applied AI tools like LangChain/LlamaIndex and RAG systems to build Pairwise's AI-powered technical staffing platform handling recruiting through offboarding. As a senior engineer, you'll architect core product features end-to-end, own technical planning, mentor team members, and shape product direction alongside experienced founders in a small, fast-moving startup.

You will work with Java, Selenium WebDriver, Playwright, REST Assured, Cucumber BDD, Postman, Swagger, K6, AWS, Kafka, Git, Maven, and CI/CD tools. You will join Agile engineering teams building cloud-native applications to deliver secure digital services for major public sector transformation programmes.

Work with SQL, reconciliation platforms (Frontier, IntelliMatch), and on-prem AWS. You will configure, build, and migrate reconciliations for Jefferies’ Core Operations Development team, supporting trade and settlement lifecycle controls across the global investment bank.

Work with SQL, reconciliation platforms (Frontier, IntelliMatch), and AWS in an Agile environment using Jira or Azure DevOps. Design, configure, and migrate reconciliations for trade and settlement controls within Jefferies’ Core Operations Development team.

Capco★3.1 (275)· London

You'll build test automation frameworks using OOP languages (Java, Scala, JavaScript) and tools like Selenium, Cypress, and Playwright, managing UI and API tests with Jira, Jenkins, and CI/CD pipelines. Capco is a consulting firm delivering digital transformation solutions for Tier 1 financial institutions across financial services and energy sectors. You'll create scalable test strategies, manage test environments, and collaborate with engineering teams on client-facing projects.

Citi★3.9 (21k)· London

You'll lead Java development on Citi's FX risk management platform, architecting high-performance, low-latency systems processing real-time risk data at scale using Java with AI-powered tools including GitHub Copilot, Devin.AI, and Citi Squad integrated into daily workflows, alongside Docker, Kubernetes, and enterprise DevOps pipelines. The team, part of Citi's 30,000-person global technology organization, manages a greenfield application in production for three years with committed long-term investment, delivering weekly releases in an agile environment.