Build AI-native agentic systems using Claude Code and Cursor across full-stack infrastructure. You will replace manual document checks and Excel-based audits in the certification industry as a founding engineer at an AI-native startup.

Sony Music Entertainment★4.2 (454)· London

Use Python, JavaScript/TypeScript, React, GraphQL, REST APIs, SQL/NoSQL databases, and AWS Cloud. Build products for Sony Music's PDEGO team that empower artists and record labels globally. Work with distributed systems, microservices, and

You'll work with Java 17+, Python, Spring Boot, Oracle SQL, document-store DBs, Kubernetes, Jenkins, and GitHub Copilot. The team builds mission-critical systems providing end-to-end visibility into payment lifecycles for an investment bank. You will mentor junior engineers and lead code reviews.

Founding ML Engineer role at an early-stage consumer health-tech startup building systems for chronic disease management. You will own the technical stack end-to-end, working with Python, Bayesian/probabilistic modelling, NLP/LLM tooling, knowledge graphs, and causal inference methods. The 12-month fixed-term position involves co-designing a domain ontology and building extraction pipelines with human-in-the-loop validation, with a path to CTO.

You'll work with Python, TypeScript, AWS, PostgreSQL, and event-driven architectures building real-time software for energy trading and grid optimization. This early-stage climate tech startup is building a new platform from scratch, and as part of a small engineering team you'll own backend services, APIs, and product features end-to-end.

You will use .NET C#, LINQ, MS SQL, Entity Framework, GIT, REST APIs, Docker, and Agile methodologies to design, build, and debug web and mobile applications. You will join the TransPerfect TechOps team, which delivers the company's GlobalLink platform and related client interfaces.

You will work with Rust, Python, Java, Go, C++, and a distributed systems stack involving edge computing, low-bandwidth radio links, and air-gapped networks. This company builds AI software that turns unstructured sensor data into real-time intelligence for semi-autonomous platforms. You will set technical direction across multiple teams.

You'll work with React, TypeScript, and Python (or Node.js) to build AI-driven matchmaking systems connecting pharma with medical experts. The platform processes 9M+ clinician profiles and billions of records, automating healthcare commercialization workflows for global drug development at G LNK (YC W25).

IFS★3.8 (14)· London

Lead/Senior Software Engineer will work with Large Language Models (LLMs), agentic AI, and cloud-native technologies to build production AI systems. The role involves designing, building, and evolving enterprise software within the Enterprise Asset Management team, applying AI to solve complex customer problems at scale.

Work with Vue.js, React, or Angular, JavaScript, HTML/CSS, and Figma. You will implement features and build reusable UI components for TransPerfect's TechOps team, which delivers workflow tools and client interfaces for the GlobalLink platform.

You'll build end-to-end features for &Dine's food marketplace using Vue.js/Nuxt.js, Node.js, TypeScript, MySQL, Docker, and AWS. The platform connects independent Makers with customers seeking handmade food. You'll be part of a lean engineering team of four, owning from design to deployment and mentoring junior engineers.

You will work with Java, React, and DevOps automation to build scalable, cloud-native applications for critical business services. The role focuses on delivering high-quality software across front-end and back-end technologies in a financial services environment.

Full Stack Python Developer using Python and Claude Code to build solutions for a leading consultancy client. This fully remote six-month contract requires US/UK candidates working Eastern Time hours.

You will work with Java, C#, modern cloud and DevOps tools to build scalable, high-performance applications. The team designs and develops these applications in an Agile environment, collaborating across functions.

You will work with Java, SQL, REST APIs, event-driven architectures, Angular, and distributed systems. You will lead an existing team of 4 to 6 developers, architecting and integrating systems.

Lead, coach, and mentor engineers using Java and JavaScript frameworks. The client is a healthcare provider building modern, scalable products to deliver world-class patient experiences across the UK as part of a digital transformation.

Product Engineer role working with TypeScript and Python, owning full-stack feature development from database schema design (Postgres) to frontend interactions. You’ll build tools enabling Fortune 500 organizations to test strategies via large-scale AI simulations, collaborating directly with the CTO and CPO.

Build full-stack products from scratch using TypeScript, React, Node.js, Python, JavaScript, SQL/NoSQL databases, Google Cloud, and AI/ML/LLM tooling. The ITO builds proprietary AI infrastructure, consumer/enterprise digital products, and the data/intelligence layer for Steven.com's creator-economy operating system. You will work directly with the VP of Engineering and product leaders on features and strategy.

This Junior Software Engineer role uses Python, Node.js, PostgreSQL, MongoDB, React, and AWS to build backend services, APIs, and frontend applications while supporting commercial machine learning model deployment.

Senior Quality Engineers will build AI Agents, test frameworks, CI tooling and helpers using LLMs and AI tooling, working with GitHub Actions and observability (Datadog, Sentry, Grafana) across an AI-assisted testing function. The team defines Lendable's test pyramid, improves E2E automation, and partners with product and engineering to shift quality left across credit products.

You'll work with AI agents, LLMs, test frameworks, CI tooling (GitHub Actions), and observability stacks (Datadog, Sentry, Grafana) to automate quality across Lendable's fintech credit products. The role enables cross-functional product teams to maintain high quality through hands-on coding, AI-assisted test authoring, and shift-left practices.

You'll work with Java (8, 17, 21), React/TypeScript (or Angular/Vue), and REST APIs to sustain current environments and deliver new capabilities across full-stack development. You will also mentor less experienced engineers through code reviews and technical guidance.

You'll use a website CMS, GA4, Google Search Console, Adwords, Meta and LinkedIn Ads Manager, HubSpot CRM, and AI tools for PPC, SEO, AEO, and email campaigns. Work.Life is a flex workspace provider focused on inbound growth and AI-driven search. This is an individual contributor role with no direct reports.

Tech Lead role using Java, Kotlin, Python, JavaScript/TypeScript, Spring, and Node.js to build cloud-based digital banking solutions. The consultancy helps clients build, launch, and run digital banks. You lead a team of engineers, contributing to system architecture, coding, and strategic decisions.

You will work with ReactJS, NodeJS, MongoDB, and AWS. The team builds a web-based SaaS platform for private equity, venture capital, and alternative investment firms to manage investing, fundraising, and operations. This senior role includes leading and mentoring junior engineers.