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 will work with LLMs, APIs, data pipelines, CRMs, ticketing systems, and platform tooling to architect and deploy AI agents. As part of the Agent Deployment Engineering Org at the conversational AI platform Decagon, you own end-to-end agent builds for enterprise customers. In this customer-facing role, you interface with senior technical stakeholders to drive implementation and production deployment.

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.

Lead iOS engineers at this AI-native consulting partner use Swift, SwiftUI, Combine, Swift Concurrency, and AI tools like Claude Code to build maintainable, tested mobile apps for clients such as PayPal and adidas. They collaborate in agile, cross-functional teams with designers and product owners.

Microsoft★4.2 (9k)· London

Lead a multidisciplinary engineering team delivering production-ready, AI-powered solutions directly within customer environments. Leverage LLMs, cloud AI platforms, prompt engineering, and retrieval-augmented approaches to solve complex organizational challenges. Manage a portfolio of engagements, coaching engineers across software, data science, and program management.

You'll work with TypeScript, Python, Playwright, Cypress, WebdriverIO, Node.js, Docker, and GitHub Actions/GitLab CI to build and maintain test automation frameworks and CI pipelines for Connected TV devices. You'll join FX Digital's Quality Engineering team, taking ownership of automation platform pieces and mentoring junior engineers—no prior TV experience required.

Meta★4.0 (1.1k)· London

Business Support Engineer supporting Meta's Business Agent, an AI platform helping businesses boost productivity. Work with Python, PHP/Hack, JavaScript/React, REST APIs, SQL, PyTorch, Llama and other LLMs, plus cloud infrastructure (Kubernetes, Docker). Provide engineering support, troubleshoot distributed systems, and build AI solutions from prototype to production.

You'll work with Java, Python, JavaScript and Agile methods to design, build and test software. The Engineering Platforms team delivers a modern software development tools chain for engineers across NatWest Group.

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).

UST★3.7 (1k)· London

You will architect, build, and scale enterprise-grade, cloud-native AI services and platforms using Azure/AWS/GCP, LLMs, RAG, microservices, APIs, and CI/CD pipelines. You will define the engineering vision and roadmap for UST’s AI offerings, transitioning capabilities from PoC into production-ready, modular, and commercially viable products. You will lead a large, cross-functional engineering organization.

Microsoft★4.2 (9k)· London

Lead a multidisciplinary engineering team using AI and LLM-based solutions, including prompt engineering, retrieval-augmented approaches, model tuning, cloud AI platforms. The team operates in a Forward Deployed Engineering (FDE) model, embedding with customer teams to build production-ready solutions. No team size specified.

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.

Build backend databases in SQL Server and Azure, build machine-learning models in Azure, Microsoft Fabric and Alteryx, and develop front-end apps using Python, SQL, C#/.NET and JavaScript for the SMDAM Private Markets team. The role drives private credit data infrastructure end-to-end, extracting insights from text to power deal-sourcing and monitoring across the entire private credit lifecycle.

Work with AWS, Docker, Kubernetes, CI/CD pipelines, infrastructure-as-code, and Python/Go/Ruby/JavaScript. You will support Digital Engagement products and help build the AI Platform at SBS, a global fintech partner for banks and financial institutions.

You will develop neuro-symbolic AI architectures for Project SENTINEL, an Innovate UK grant-funded initiative building provably safe guardrails for autonomous systems. Your daily work involves Python and ML libraries (PyTorch, TensorFlow, scikit-learn) to design deep learning models, NLP systems, and scalable ML pipelines for production deployment.

You'll work with Python, FastAPI, TypeScript, React, and GCP to design services, data models, and APIs. Electric Twin builds a behavioral simulation platform that creates "digital twins" of populations to predict human behavior, already used by major organizations. You'll join a high-caliber team of 17, owning complex systems from design to deployment.

Research Engineer role at Electric Twin, a London AI company building LLM-powered synthetic populations for behavioral prediction, using technologies like chain-of-thought prompting, RAG architectures, multi-agent tool use, Python, and FastAPI. You'll design memory systems and decision-making frameworks within the Science team, running experiments to validate agent behavior against real-world data.

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.

The role involves developing Salesforce Lightning and Force.com solutions using Apex, SOQL, and JavaScript, with object-oriented programming in Java or C#. Git, Jira, IntelliJ, CI/CD, and Salesforce REST APIs are also mentioned. The position is with Hackajob Ltd, but the listing gives no details on the product or team.

You will work with Nest.js, TypeScript, Angular (v20), Ionic, and Azure CI/CD. As a senior full-stack individual contributor, you’ll build and maintain the ZigZag Puppy Training mobile app (iOS and Android) and help raise the bar on backend systems, APIs, and data-driven product development.

Founding Backend Engineer role at a VC-backed collaborative AI startup. You will architect infrastructure for an agentic collaboration platform, owning backend systems using TypeScript, Node.js, and PostgreSQL, and building real-time workflows for enterprise clients.

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.

You will build interactive 3D subsurface visualizations using WebGL/Three.js and collaborate with the ML team to integrate explainable AI models. The role involves owning the user experience for a subsurface mapping platform that helps global mining leaders make drilling decisions. You will be the first product engineer at Material Difference, a venture-backed Cambridge University spin-out.

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.