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 work with Python, JavaScript, SQL, Kafka, AWS/Azure, PostgreSQL, SQL Server, ClickHouse, and MongoDB. The team designs and delivers real-time, high-performance trading systems for Energy & Commodities, integrating market data, risk, and front-to-back office workflows.

You will work with C# / .NET, modern front-end frameworks (Blazor, React, Angular, or Vue), and cloud platforms (AWS, Azure, or GCP) on the Web team. This team builds web frameworks powering TradingHub’s MAST and CaaS trade surveillance products for financial institutions.

Build backend services and APIs in Python on Linux for a greenfield system monitoring and performance analysis tool at a top-tier investment bank. You'll develop scalable data pipelines and real-time analytics to detect anomalies and track

ExxonMobil★3.9 (5.7k)· London

Work as a Full Stack Developer using Python, Node.js, React or Angular, SQL/PostgreSQL/MongoDB, and cloud platforms like Azure/AWS/GCP. You will build and maintain scalable web applications, APIs, dashboards, databases, and data pipelines to support ExxonMobil's Global Trading organization's commercial and trading activities.

You will work with front-end technologies (HTML, CSS, JavaScript, React, Angular), back-end (Python, Node.js), databases (SQL, PostgreSQL, MongoDB), and cloud platforms (Azure, AWS, Google Cloud). You will design and maintain applications supporting commodity trading, market analysis, and risk management within ExxonMobil's Global Trading organization.

Build React and JavaScript/TypeScript front-end applications for trading, pricing, and quantitative research at a leading buy-side investment firm.

ExxonMobil★3.9 (5.7k)· London

Full stack developer using React or Angular, Python or Node.js, SQL/PostgreSQL/MongoDB, and cloud platforms (Azure, AWS, Google Cloud). Builds and maintains web applications, APIs, and data pipelines supporting commodity trading, market analysis, and risk management within ExxonMobil’s Global Trading organization.

Senior C# .NET Developer working on high-performance applications for Global Markets IT. You will use C#, .NET, MS SQL, and DevOps/CI/CD tooling to build event-driven architectures supporting XVA, Liquidity and Financial Resource Management, collaborating with Front Office stakeholders.

Work on front-office trading platforms using C# on the backend and React or Angular on the frontend, with modern cloud infrastructure. You'll build technology central to one of the world’s largest investment platforms at a global asset manager where engineering drives the business.

You will work with Playwright, JavaScript, TypeScript, automation frameworks and CI/CD pipelines on a strategic front‑office derivatives trading platform, embedded within the bank’s Front Office Derivatives Technology team.

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.

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.

Grid Dynamics★3.4 (19)· London

Build high-performance React and TypeScript trading applications using WebSockets, RSocket, and streaming market data. Work within an embedded team modernising a Tier 1 investment bank’s electronic trading platforms, migrating legacy Angular apps to React. Collaborate with backend Java engineers on mission-critical front-office systems.

Work with Java 21, Spring Boot, Spring Cloud, ReactJS, Microsoft Azure, Kafka, JMS, REST APIs, microservices, and CI/CD. You'll contribute to FX platform modernisation programmes, transforming legacy systems into cloud-native architectures within a financial services consultancy.

TP ICAP★3.1 (34)· London

You will work with React, TypeScript, C#, .NET, Java, SQL, GitLab, CI/CD, and AWS. As part of the Equities technology team, you will contribute to front-end and back-end software for internal broking users and external customers.

React, TypeScript, AG Grid, RxJS, WebSockets, and OpenFin are used to build a new modular UI layer and real-time trading applications for G10 Rates front-office trading.

Work with C#, .NET, React, SQL Server, and Azure to support, maintain, and enhance business-critical front-office applications in an investment management environment. You will troubleshoot production issues, deliver enhancements, and contribute to migrating legacy applications onto strategic platforms.

TP ICAP★3.1 (34)· London

You will architect and build a greenfield desktop platform automating trading desk workflows for TP ICAP's ICAP Relative Value division, which executes complex multi-leg synthetic strategies in US Treasuries, Futures, and Options. The role uses expert-level C# / .NET, ASP.NET Core, event-driven messaging, desktop web hosts (Electron, Tauri, or .NET), React/TypeScript, and AI-assisted development tools. This is a high-visibility player-coach role leading a multi-year transformation.

Build UI components using React.js, TypeScript, JavaScript, HTML5, CSS3/SASS, and state management tools. You will join the Global Markets Technology team at a leading investment bank, designing responsive, data-driven interfaces for trading, risk, and analytics platforms.

TP ICAP★3.1 (34)· London

You will work with C#, TypeScript, React, SQL, RESTful APIs, AWS, Docker/Kubernetes, GitLab CI/CD, and microservices to design and maintain full-stack applications. The team builds scalable applications powering critical business functions within TP ICAP, a global interdealer broker providing market infrastructure and data solutions.

Work with React (or similar JavaScript frameworks), Python, Go, or Java, building APIs with REST, gRPC, NATS, AMPS, or Kafka, and handling data/storage layers. You will own end-to-end features for the firm’s proprietary trading and risk platforms, supporting real-time pricing, risk management, and execution across global commodities markets.

Java, React (Vite, NX), Kafka/Solace/RabbitMQ, WebSockets/SSE, Rx, Kubernetes, and SQL drive a multi-year platform modernisation building real-time, low-latency, high-performance microservices for front office trading. You will combine hands-on engineering with technical leadership, shaping architecture and engineering standards.

You will work with C#, .NET, ASP.NET (or other OO frameworks), and a modern front-end framework (Blazor, React, Angular, or Vue). The Web team builds and maintains the underlying frameworks for trade surveillance products (MAST and CaaS) that help financial institutions configure metrics and dashboards to monitor regulatory risk.

Work with C# / .NET, ASP.NET, Blazor, React, Angular or Vue, and cloud platforms (AWS/Azure/GCP). You'll join the Web team building the frameworks powering TradingHub's trade surveillance products (MAST and CaaS) for financial institutions.