Work with Python, SQL, JavaScript/TypeScript, NumPy, Pandas/Polars, visualization libraries, and deep learning frameworks (PyTorch, JAX, or TensorFlow) to design and deploy full-stack data-driven applications and machine learning solutions. You will be embedded with Arsenal's Men’s First Team Analysis department, building tools that directly support coaching and analysis workflows.

VueJS 3, JavaScript (ES6), HTML5, CSS3 (SASS), RESTful APIs, GIT, Azure DevOps (CI/CD), Jest, Cypress/Playwright. Build and maintain modern web applications, developing reusable UI components and ensuring responsive, accessible, performant frontends.

Teksystems★3.8 (4.7k)· London

You will work with Java (Spring Boot) and Angular to enhance and maintain a large-scale customer relationship management platform for a Tier 1 banking client.

Full Stack Developer role using C#, .NET, JavaScript, and Umbraco for an established luxury travel company. The work involves a major transformation programme building web-based tools to automate operational tasks, improve pricing accuracy and management information, plus website enhancements.

You'll work with JavaScript, Java, .Net, or Python; version control (e.g., Git, Mercurial); CI/CD tools (e.g., Jenkins, TeamCity); and automated testing frameworks. The team collaboratively designs and builds proof-of-concept or production systems.

You'll work with AWS, MySQL, Angular, Bootstrap, Kotlin, Spring Boot, microservices, IBM watsonx AI, and third-party integrations (Intercom, GetAccept, Calendly). The role covers MyIntent, Bequeathed's platform for online will-writing and expanding later-life services like LPAs and estate administration, delivered as SaaS via B2B2C partners. It's a senior individual-contributor role with technical leadership, not large-team management.

You will work with React, modern JavaScript/TypeScript, and APIs. As part of a fintech engineering team, you'll build data-intensive platforms that support business-critical workflows, taking ownership of features from design to deployment.

You’ll work with Python, Docker, CI/CD, AWS or Azure, SQL, Linux, Bash, Git/GitHub, and optionally Streamlit, Rust/C/C++ or React. You’ll join the Internal Tools team at an AI scale‑up building the systems that deploy, operate and scale its flagship AI product for data‑centre energy efficiency.

Work with Java, Spring Boot (including Batch and Cloud), microservices, REST API, GraphQL, NoSQL (Azure Cosmos DB), Confluent Kafka, OAuth 2.0, Microsoft Entra ID, and Azure Cloud Services (App Services, Azure Monitor, API Management). You will build and maintain backend services for an unspecified product or project at Infinity Quest.

Appvia★0.0· London

You’ll work with Java, Spring Boot, TypeScript, MongoDB, Docker, Kubernetes, Maven, and GitLab. You’ll join a client-facing software engineering practice delivering a modernisation and AI-enabled transformation programme as a greenfield build within a brownfield ecosystem.

You'll work with AWS, GCP, SIEM, EDR, DLP, MDM, Python, Go, and TypeScript. Risk Ledger builds a network for supply-chain organisations to share security maturity and visualise risks. You'll mature security operations, detection, incident response, and cloud security across cloud, endpoint, and SaaS environments.

You will build and maintain data-focused, high-performance front-end products using JavaScript/TypeScript, with server-side languages (C#, Java, NodeJS, SQL) and frameworks like React/Redux as nice-to-haves. The Trade Desk is a global digital advertising platform, and you'll own full-lifecycle development of features for user-facing interfaces. With 7+ years of experience, you'll work on an agile, distributed team spanning multiple time zones and continents.

You'll work with React (Vite), Tailwind, Node.js, Express, tRPC, PostgreSQL, and Elasticsearch, building scalable APIs and front-end features. The company is a high-growth B2B SaaS firm creating an advanced property data platform for UK property professionals, integrating thousands of data sources. This hands-on leadership role also involves mentoring engineers and shaping architecture.

Backend QA Engineer for Lush's Digital team, testing GraphQL/REST APIs, databases (PostgreSQL, MySQL, MongoDB, DynamoDB), and microservices using TypeScript, Python, Docker, and CI/CD. Builds automated test frameworks, validates data workflows with SQL/NoSQL, and runs performance/security tests (k6, JMeter, OWASP). The team drives a global digital transformation of the company's platform.

You will use HTML, CSS, JavaScript, React or Angular, CMS tools like WordPress and Drupal, and Adobe Creative Suite. As a remote web designer for a UK-based digital studio, you will design and develop client websites, creating wireframes, mockups, and prototypes.

Meta★4.0 (1.1k)· London

You will work with languages such as C++, Java, Swift, Kotlin, Python, JavaScript, and Hack, plus AI tools for workflow optimization. The team builds and improves cutting-edge mobile and web products that connect billions of people globally.

JPMorgan★3.9 (20k)· London

Cisco VPN infrastructure, Cisco ASA, ISE, CSM, Firepower/FDM, FTD/FMC, SASE, ZTNA, routing (BGP/OSPF/EIGRP), security protocols (IPsec/SSL/TLS/RADIUS/TACACS+), and automation tools (Ansible, Python, NSO, DNA Center, Terraform, Prime Infrastructure). You will design, implement, and operate enterprise VPN services enabling secure remote connectivity for the global workforce within the End User Compute organization at JPMorgan Chase.

Wise★3.5 (42)· London

You will build scalable systems for business onboarding and verification using Java or JVM languages, Spring framework, JDBC, and relational/non-relational databases with CI/CD pipelines and distributed systems. This engineering team owns end-to-end projects to automate verification, create flexible onboarding journeys, and manage compliance risks for Wise’s money-moving platform across Europe and the UK.

You'll work with JavaScript, Node.js, Express, React, and MongoDB/Mongoose to set technical direction and oversee AI-assisted content-creation features. As Fractional Head of Product at StoryTerrace, you'll own the roadmap for two B2C platforms—an established product and a new self-serve app—directing one Full Stack Developer and advising on hiring. This role reports to the CEO and requires hands-on coding experience to unblock development.

HCLTech★3.7 (11k)· London

As Java Technical Lead, you will lead a team of developers designing and implementing RESTful web services using Spring Boot, with microservices, Docker, and Kubernetes. Your role involves overseeing architecture, code reviews, and mentoring for HCLTech’s Java/J2EE application projects.

Sunlighten UK & Europe★2.0 (1)· London

You’ll work with Five9 (or comparable contact-center platforms), Salesforce Sales/Service Cloud, REST APIs, Zapier, and possibly JavaScript, Python, or .NET to build IVR, dialer, lead-routing, live-chat, and SMS integrations. The role owns Sunlighten’s UK omnichannel customer-engagement platform, connecting customers with Sales and Customer Care across voice, digital, and messaging channels. No team size is stated.

Meta★4.0 (1.1k)· London

Work with languages such as C++, Java, Swift, Kotlin, Python, JavaScript, and Hack to build and optimize user-facing applications across mobile and web. As a member of Meta’s product engineering teams, you’ll help advance its platforms—Facebook, Instagram, WhatsApp, and immersive AR/VR experiences—that connect billions globally.

You'll work with Java/JVM and Spring on the backend, React/JavaScript/TypeScript on the frontend, plus CI/CD, distributed systems, and relational/non-relational databases. You'll join Wise's Account Integrity team, building fraud-prevention and financial-crime detection systems to protect customer accounts. Wise is a global technology company for moving and managing money.

Sainsbury’s★3.5 (16k)· London

You will build and integrate server‑side logic for the Multichannel Messaging Hub, using Node.js, TypeScript, microservices, REST/JSON/SOAP APIs, Kafka, Snowflake, AWS serverless services, Kubernetes, and Terraform. The team of 7 engineers owns cross‑channel campaign delivery for Sainsbury’s brands.