Work with Python, JavaScript, SQL, Kafka, AWS/Azure, PostgreSQL, SQL Server, ClickHouse, MongoDB, and optionally Kubernetes to architect real-time, high-performance trading systems for energy and commodities markets, integrating market data, risk, and back-office platforms.

Build high-performance front ends using React, TypeScript, JavaScript, React Hooks, and ES6/ES7 within a leading HFT firm's trading environment.

You'll work with Core Java, Aeron, FIX, SBE, Artio, Linux, and performance profiling tools. The team develops a high-performance electronic trading platform focused on microsecond-level latency.

Work with server-side Java, multithreaded development, low-latency applications, enterprise messaging (multicast, low-latency platforms), FIX, and time-series databases (kdb+). The team builds high-performance, distributed systems for global FX electronic trading, managing liquidity, real-time pricing, order execution, and algorithmic trading strategies.

You will support a low-latency Cash Equities trading platform using Unix/Linux, Python, Bash, Go, Dynatrace, Prometheus, and Grafana. The team provides Level 1/2/3 production support directly alongside front office traders, quants, and developers for a global investment bank.

Support equity trading systems using Python, PowerShell, SQL, FIX, and monitoring tools like Geneos or Zabbix, working with OMS/EMS platforms (e.g., FlexTrade, Triton, SpiderRock) and cloud technologies (AWS or Kubernetes). The role partners directly with Portfolio Managers, Traders, and Analysts to ensure reliability and performance of front-to-back equity platforms.

Senior UI Software Engineer building high-quality trading GUIs for Citi's FX pricing platform. Work with TypeScript, React, HTML5, CSS, JavaScript (ES6+), Chromium/Electron/OpenFin, FDC3, REST/WebSocket APIs, Kafka/Solace/Tibco, and CI/CD (Jenkins). Provides technical leadership, driving AI integration and performance engineering across globally distributed teams.

You will work with Java, Spring Boot, React, TypeScript, Node.js, Kotlin, microservices, and testing tools like Jest and Cypress. As part of Citi’s Finance Technology team, you will lead the re-platform of applications supporting Finance, Risk, and Controllers.

You will use Java, Spring Boot, RESTful APIs, microservices, SQL, and AI development tools like GitHub Copilot or Claude, with Angular, TypeScript, HTML, and CSS desirable. The team builds large-scale enterprise applications for a global financial services organization.

Senior Full Stack Kotlin Developer working with Kotlin, Java, Spring Boot, microservices, REST APIs, Node.js, TypeScript and cloud-native tools (AWS/Azure/GCP, Docker, Kubernetes, Terraform, CI/CD). You will build secure, scalable digital services for large-scale public sector and healthcare digital transformation programmes within Agile, multidisciplinary teams.

You’ll work full-stack with TypeScript, React, and Python, with Next.js a plus. The company builds a platform for continuous auditing of AI models to ensure transparency, oversight, and fairness in HR tech. As an early product engineer, you’ll join a five-person team growing to ten by mid-2026.

You'll work with Java, Elixir, Scala, TypeScript, Kubernetes, Docker, Linux, and git; SQL and Spark are desirable. You'll join the Compliance group, building technology solutions for regulatory reporting and trade surveillance at a tech-driven proprietary trading firm.

You'll build full-stack, cloud-native applications using Java, Spring Boot, React/React Native, RESTful APIs, microservices, SQL, and AWS. Working in Agile teams, you'll design and maintain scalable software supporting critical financial-services business operations.

You will work with Python, Java, Go, React/TypeScript, Apache Kafka, PostgreSQL, Git/GitHub, AWS, and CI/CD pipelines. As part of a client-facing delivery team at a digital engineering company, you will design and build technology-enabled platform solutions.

You will work with Python, FastAPI, TypeScript, React, and GCP to design and build services, data models, and APIs. Electric Twin builds a behavioral simulation platform that creates "digital twins" of populations to help organizations predict human behavior.

You'll build features using Svelte/TypeScript on the front end and Python (FastAPI/Django) on the back end, with AWS infrastructure. Tab is a profitable London travel fintech processing real-time payments in 100+ currencies for over 100,000 independent tourism businesses globally.

Work with Angular 19, FastAPI, Python, and Kubernetes. Join a 13-person team shipping high-impact features like product launches and partner integrations for Urban Jungle's insurtech platform serving 300,000+ customers.

You will work with TypeScript, JavaScript, gRPC, Redux, React Native, React, Next.js, and infrastructure like Google Cloud Platform, Kubernetes, and Docker. The role focuses on building new features and integrations for Emma’s mobile and web apps, which help users manage all their finances.

The role involves building and maintaining the company’s platforms,

You will build backend systems, APIs, and developer portals on the Backstage framework using TypeScript, Node.js, and modern web technologies. This is a high-impact development squad creating commercial offerings to improve developer experience for external clients and internal teams.

Work with Salesforce Lightning, Apex, SOQL, JavaScript, and the Force.com platform, alongside object-oriented programming (Java or C#). Use Git, Jira, IntelliJ, and CI/CD practices, with exposure to Salesforce REST APIs. No specific team or project details are provided.

Java Developer role at Matchtech using Java, Spring Boot, Spring MVC, REST APIs, microservices, SQL, MySQL/PostgreSQL/Oracle, and Git/Bitbucket. The listing focuses on backend or full-stack development requirements but doesn't specify a particular project or team scope.

You will work with JavaScript, Java, .Net, Python, Git, Mercurial, Perforce, Bamboo, Jenkins, TeamCity and Bitbucket. You will join Hackajob Ltd to collaboratively design and build proof-of-concept or production systems.

You'll work with TypeScript, React, Node.js, Python, and Google Cloud/AWS, architecting AI-native systems including LLM-powered workflows and agentic pipelines. Steven.com builds the operating system for the creator economy, powering proprietary AI infrastructure and digital products. This is the most senior individual contributor role, owning architecture for the company's highest-stakes systems.

Build next-generation software powered by agentic AI workflow engines, using TypeScript across frontend and backend. This hands-on technical leadership role focuses on shaping architecture and driving direction for a high-calibre engineering team, with bonus experience in LLM-powered applications.