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.

BNY★3.5 (5.5k)· London

You'll use Java 17/21 with Spring, Maven, Groovy, JavaScript/TypeScript (Angular), Docker, GitLab CI/CD, IntelliJ, Windsurf, Splunk, and AppDynamics to build secure backend services, batches, and APIs for a global financial services company.

You will work with Core Java, Aeron, FIX, SBE, Artio, Linux, and performance profiling tools. You will join a team developing a high-performance electronic trading platform with a focus on microsecond-level latency. The role requires 5+ years of Core Java experience and 2+ years in ultra-low-latency systems.

Develop low-latency server-side Java components for a global eTrading and eRisk platform serving FX and electronic execution. You’ll work with enterprise messaging (multicast, low-latency), FIX protocol, kdb+, and apply CI, TDD/BDD. The team builds distributed systems for pricing, order execution, and algorithmic trading.

Java 11+, Spring Boot, microservices, event-driven architecture, Terraform, and cloud platforms (Azure, AWS, or GCP). The team builds post-trade technology solutions including business-critical applications, APIs, client reporting platforms, and web portals for capital markets. You will mentor developers and contribute to architectural decisions.

You will work with Python, PowerShell, SQL, OMS/EMS platforms (FlexTrade, Triton, SpiderRock), Linux, Windows, cloud (AWS/Kubernetes), FIX, messaging systems, market data flows, and monitoring tools like Geneos/Zabbix. As part of a global hedge fund’s front-office technology team, you will directly support equity portfolio managers, traders, and analysts to ensure the reliability and performance of business-critical trading systems.

Luxoft★4.5 (669)· London

Lead Python engineer designs, builds, and maintains risk engineering systems for a global commodity trading company, working on commodities risk and market data pipelines. Uses Python, AWS/GCP/Azure, CI/CD, containerization, and AI-assisted tooling. Collaborates with quants, traders, and risk managers in a high-velocity delivery environment.

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.

Wise★3.5 (42)· London

Build backend

You will design and build a low-latency, high-throughput Smart Order Router and execution-algo suite in Java, with technologies including FIX, Aeron, Chronicle Queue, LMAX Disruptor, multicast feeds, and kernel bypass. The team is developing greenfield EMS and SOR execution algorithms (VWAP, TWAP, POV, liquidity seeking) for FX and digital-asset markets.

You will use server-side Java, enterprise messaging (multicast, low-latency), FIX, and kdb+ to build low-latency components for an electronic trading and risk platform. The team develops high‑performance distributed systems that manage liquidity, generate real‑time prices, handle order execution, and support algorithmic trading across global FX and electronic execution.

Adaptive Financial Consulting★5.0 (1)· London

You will work with Core Java, Java 17+, FIX protocol, and event-driven architecture in cloud-based environments. You will help design and deliver front-office trading technology solutions (OMS, EMS, exchange systems, matching engines) for capital markets clients.

Adaptive Financial Consulting★5.0 (1)· London

Java, Spring, Cucumber, JUnit, GitHub, FIX Protocol, and Aeron are key technologies. The role is within a financial consulting firm that designs and delivers front-office technology solutions for capital, commodity, and digital market participants. This is a contract position, outside IR35, in the Fintech sector.

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.

Python, JavaScript/TypeScript, Java, C#, Go, pytest, Jest, JUnit, xUnit, Go testing. You will work on a project with a leading AI lab, building and debugging production systems.

You will work with Java 11+, Spring/Spring Boot, Microservices, TDD/BDD (JUnit, Spock, Mockito), Git, Maven, and CI/CD on a cloud platform (AWS, Azure, or GCP). The role involves building and evolving a post-trade technology platform — including in-house systems, APIs, and client portal — for a specialist post-trade clearing and prime brokerage firm. You will also manage and mentor a small team of Java developers.

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.

Design and evaluate realistic software engineering tasks using Python, JavaScript/TypeScript, Java, C#, or Go with testing frameworks like pytest, Jest, JUnit, xUnit, or Go testing. As a project consultant, you will create complex multi-file coding scenarios, write specifications, and review peer submissions. The role is part-time and remote.

This Test Manager role oversees end-to-end testing for large insurance programmes using test management tools like JIRA, with essential Agile/Scrum experience and knowledge of QA methodologies, test automation, and defect management. The position coordinates testing processes across major initiatives at Arch Insurance, collaborating with developers, QA engineers, product managers and stakeholders to ensure quality, compliance and UAT delivery. The role requires significant leadership experience managing large testing implementations and driving continuous improvement across testing practices.

Work with Python, AWS, PostgreSQL, Redshift/Snowflake, S3, and React to build backend services and APIs. You will join the Optimisation CoreTech Strats team to develop data pipelines and systems for financial institutions to submit risk and trade data for large-scale optimisation runs. This is a mid-level engineering role.

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.

Head of Quality Engineering to own quality across the organisation, working with PHP, Kotlin, GO, Python, Typescript, React, React Native, GraphQL, Relay, PHPUnit, Behat, JUnit, Kotest, Jest, Maestro, K6, Datadog, Sentry, Incident.io, Grafana, AWS, Docker, Kubernetes, RabbitMQ, Argo, Github, and Github Actions. The role will lead the use of AI (LLMs) for testing and will manage a team of approximately two Quality Engineers while being hands-on with code and CI pipelines. Lendable builds technology for consumer credit and savings products.

LSEG★3.7 (402)· London

Build and enhance systems for large-scale financial optimisation runs using Python, AWS, PostgreSQL (RDS), Redshift/Snowflake, S3, and React. You will integrate financial data into optimisation algorithms and develop APIs and backend services alongside the Quantile CoreTech Strats team at LSEG.

Develop production code using Java 8+, Spring (Core, Boot, Integration), Kafka, Oracle/MySQL, and tools like JUnit, Mockito, Cucumber, Selenium. This role designs and secures scalable tech products for a bank, handling system design, microservices, and operational stability in an agile environment.

Senior Java Developer working with Java, Git, CI/CD pipelines, and Linux, with familiarity with FIX messaging. The role involves building and enhancing backend applications for FX matching systems to improve speed, stability, and scalability.