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 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.

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

You will work with Java 11+, Spring Boot, microservices, event-driven architecture, cloud platforms (Azure, AWS, GCP), Terraform, CI/CD (Azure DevOps, GitHub, Jenkins), and AI development tools. The team builds post-trade technology solutions, APIs, client reporting platforms, and customises trading systems for capital markets.

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.

Use Kotlin, Java, Spring Boot to build microservices and REST APIs on AWS, Azure, or GCP with Docker, Kubernetes, and CI/CD. You'll join a digital consultancy delivering secure, cloud-native solutions for public and private sector clients, with opportunities to mentor junior engineers.

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 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'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'll build Python backends, React frontends, and core ML systems for an AI-driven vulnerability management platform that prioritizes cybersecurity threats using attacker logic. You will own model training, evaluation pipelines, and agentic AI features.

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,

Work with SAP Hybris (SAP Commerce Cloud), Java, Spring Framework, REST APIs, SQL, relational databases, Git, CI/CD, and Agile. Develop and enhance ecommerce platforms for retail clients.

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 Java, Spring Boot, React, Node.js, PostgreSQL, ActiveMQ, and Kafka to build software as part of an agile team. The company operates as a financial services organization.

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.

Mid-level backend engineer role working with TypeScript/JavaScript, gRPC, Vitess, MySQL, CockroachDB, BigQuery, Redis, Google Cloud Platform, Kubernetes, Docker, Terraform, and monitoring tools like Grafana and Prometheus. You'll build Emma's personal finance app, tackling scaling, data processing, and features like overdraft prediction and subscription clustering, working directly with the CTO.