Tech Lead role at a boutique financial services consultancy building digital banking solutions. Leads a team of engineers using Java, Kotlin, Python, JavaScript/TypeScript, Spring, and Node.js, with hands-on coding, system architecture, and cloud-based applications.

You'll work with AWS, AWS CDK, Kubernetes/EKS, Lambda, ECS, CircleCI, GitHub Actions, Redshift, RDS, Kafka, Flink, Redis/Valkey, Datadog, and scripting languages like TypeScript, Python, or Bash. Sparta is a commodity trading platform; its Platform Engineering team owns the tooling, automation, and infrastructure that developer teams use to build, deploy, and run software.

You'll work with GitLab, Artifactory, Ansible Automation Platform, Kubernetes, ArgoCD/Flux, and cloud-native technologies. As a Principal Engineer in the Engineering Platforms team, you’ll deliver a modern software development toolchain for over 25,000 colleagues across the bank, coordinating multiple feature teams and defining architecture for end-to-end automation and scalability.

This role involves building data pipelines, Snowflake data models, and automation using SQL, Python, Java, or R, with practices like version control and CI. The engineer joins Sony Interactive Entertainment's Security Data Analytics team, supporting Information Security with analytics-ready data and AI-enabled workflows.

You will work with Kotlin, Java, Python, or TypeScript on AWS (Lambda, ECS, EKS), using AWS CDK, Terraform, Kubernetes, Datadog, Kafka, Flink, Redis/Valkey, RDS, and Redshift. This role is a 50/50 backend and reliability engineering split on Sparta’s commodity trading platform, building distributed services for real-time market data and owning production observability and resilience.

You will work with ReactJS, NodeJS, MongoDB, AWS, HTML/CSS/LESS/SASS, and Git/CICD. Atominvest builds software that powers private equity, venture capital, and hedge funds to manage investing, fundraising, and operations. You will help mentor junior team members, though the team size is not specified.

You will lead a team of 3–5 engineers using TypeScript (Node.js/NestJS, React/Redux), SQL, and data visualization tools. Your Investigations team builds products to help compliance teams track crypto fund flows and uncover illicit activity. You will also guide use of AI coding assistants like Copilot and Cursor.

You’ll build cloud-first web apps using C#/ASP.NET Core, TypeScript/React/Angular/Blazor, REST APIs, microservices, and messaging (Service Bus/Kafka), deploying via Azure Kubernetes Service, Docker, and DevOps tools like Git, Jenkins, and Azure DevOps. You’ll join the Tax & Legal Technology team—300+ technologists—working on tax and legal software, client portals, and generative AI initiatives in small agile engineering teams.

You will work with Kotlin, Java, Python, TypeScript, AWS/GCP, Kafka, Flink, Redis, and clustered Postgres, using agent-based tools like Claude Code. As a backend engineer on Sparta’s next-generation commodity trading platform, you’ll design and maintain services for real-time and analytical data processing, optimizing for low latency and high throughput.

Design and deliver secure, scalable Microsoft 365, Azure and AI-enabled solutions using TypeScript, SharePoint Framework (SPFx), Microsoft Graph APIs, PnP PowerShell, Azure AI Foundry, Azure OpenAI, Azure Functions, Logic Apps, .NET Core, C#, Terraform and Bicep for client projects.

Work with Java, Python, JavaScript, ReactJS, AngularJS, AWS, GitLab, Google Cloud Platform, Kafka and Hadoop. You will join the Engineering Platforms team delivering a modern software development toolchain for engineers across the bank.

WPP★3.7 (378)· London

You will work with Java 17+, Spring Boot, Azure (containerisation and serverless), Terraform, and Python to develop enterprise-quality optimisation and ML solutions. This role leads the creation of a new platform for a major field operations provider, building logistics optimisation products with Satalia’s data science and engineering teams.

You will work with Python, FastAPI/Django, React, and AI tools like Claude Code, Enterprise Claude, Gemini, or Copilot. As a senior technical leader on the Real Assets and Real Estate technology team, you will build platforms supporting the end-to-end asset lifecycle for Macquarie Asset Management’s private markets business.

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.

Lead Engineer role using React or similar component-oriented front-end frameworks, TypeScript, Azure, and CI/CD pipelines. The digital team builds customer-facing retirement, investment, and protection products for Canada Life UK. You will set UI/UX and accessibility standards across a cross-functional product team.

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 will work with Python, SQL, Pandas, NumPy, Flask/FastAPI/Django, Unix/Linux, shell scripting, CI/CD, and REST APIs. The role develops and enhances backend applications and data processing pipelines supporting risk calculations, trade workflows, and reporting for an investment banking trading and risk platform.

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.