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 will work with SailPoint IdentityIQ, Java, Active Directory, Azure AD, LDAP, Workday, Fieldglass, SAML, OAuth, and SCIM. You will join AIG’s Identity and Access Management team, designing and maintaining enterprise IAM infrastructure for the global insurance company. No team size is stated.

Fitch Group★4.5 (4)· London

Service Reliability Engineers embed with Fitch Ratings development squads, using AWS, Azure, Kubernetes, Docker, GitHub Actions, Datadog, and AWS Bedrock/SageMaker. They drive reliability, observability, and AI-enabled operations for mission-critical services, focusing on new AI development and cloud infrastructure automation.

You will work with Go, Rust, Python, Java, C++, headless browsers (Chrome DevTools Protocol, Playwright, Puppeteer), proxy systems, and distributed systems. The team builds infrastructure for massive web data acquisition and operates a distributed crawler via the Grass bandwidth-sharing network, powering dataset creation for AI model training.

Work with Python, Java, or C++, and AI frameworks like TensorFlow, Keras, or PyTorch to develop and implement AI models and algorithms. You will solve real-world problems, integrate AI into existing systems, and research performance enhancements for cutting-edge AI applications at Demo Co.

You will work with Oracle (Exadata Cloud, Autonomous, 11g/12c/18/19c, RAC, ASM, Data Guard), PL/SQL, Python, Bash/KSH, Ansible, Java, Oracle APEX, Git/Stash, JIRA, RMAN, and data pump. The Global Database Engineering Team manages Deutsche Bank’s relational database platform and builds automation to keep business systems operational.

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.

Hands-on technical lead supporting low-latency trading infrastructure and financial systems. Technologies include AWS, Kubernetes, Terraform, Ansible, Jenkins, GitLab, Python, Bash, Docker, Splunk,

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.

GUARDIAN NEWS & MEDIA★4.6 (7)· London

Staff Android Developer role building the Guardian Android app in Kotlin and Java, using Jetpack Compose, Coroutines & Flow, MVVM, WebViews, and modular architectures. You'll lead technical direction, influence architecture, and mentor engineers across multiple teams for an app with over 5 million downloads.

Lead AI Software Engineer working hands-on with Java, Spring Boot, React or Angular, RESTful APIs, microservices, Kafka, RabbitMQ, and cloud-native architectures. The role leads software implementation and engineering delivery across squads for VOIS, Vodafone’s strategic arm creating intelligent solutions.

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.

Millennium Management★3.8 (21)· London

Work with Python, Java, or Rust on microservices in AWS, GCP, or another public cloud. You'll architect and develop enterprise-scale data ingestion and distribution frameworks for intraday risk, trade, and portfolio management, partnering closely with portfolio managers and risk teams.

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 Pricing Engineer at Citi's FX eTrading team, working with Java to build and optimize low-latency trading systems. Role involves hands-on technical implementation, system architecture, and managing a team of engineers.

Senior Low Latency Engineer working with Java, C++, Rust, KDB, market data, algorithmic trading, microservices, event sourcing, Linux, and kernel bypass technologies. The High Performance Architectures team produces application frameworks to modernise low latency eTrading platforms across over 100 teams at Citi.