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.

dunnhumby★3.9 (87)· London

Python, APIs, microservices, cloud (AWS, GCP, or Azure), large-scale data systems and pipelines, front-end work, and AI-assisted engineering tooling. The role builds dna, a collaborative Retail and Commerce Media service that unifies fragmented market data for retailers, brands, and agencies. You embed with clients to ship production-ready code against real data and 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'll design, build, and operate production AI/ML applications using Python, Generative AI, LLMs, RAG, agentic systems, backend services, APIs, cloud-native apps, CI/CD, containerisation, MLOps, and LLMOps. The role sits in The AA's newly established AI function creating intelligent products for members, customers, and frontline teams.

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’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.

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.

You will work with Python, LLMs, and modern generative AI technologies to build and launch AI-powered products used by millions of learners and professionals globally.

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