You'll work with Python (pandas, OOP), SQL (PostgreSQL, Snowflake), CI/CD pipelines, Git, and GitHub. You'll develop and support in-house fund management tools that assist Fund Managers in managing funds for Legal & General's asset management division.

Deliveroo★3.3 (1.5k)· London

Build production infrastructure for Generative AI at Deliveroo and DoorDash, leading design and architecture for real-time GPU serving, high-throughput batch inference, and fine-tuning (SFT/DPO/LoRA) of open-weight LLMs and VLMs. Own the LLM Gateway, Agent Gateway, evals infrastructure, guardrails, and cost attribution, while mentoring engineers and setting technical direction for a small, high-leverage centralized GenAI platform team.

JPMorgan★3.9 (20k)· London

You will work with Java, TypeScript, React, Scala, SQL and No-SQL databases on cloud-native platforms. As part of JPMorganChase’s Data Platforms team within the Chief Data & Analytics Office, you will engineer solutions in metadata, meta-modelling, distributed systems, domain-specific languages and interpreter design. You will provide technical guidance to the team.

Lead Cloud Engineers at Made Tech use AWS, Azure, GCP, Terraform, CloudFormation, Docker, Kubernetes, CI/CD, and languages like Python, Bash, and JavaScript. They help public sector organisations design, implement, and maintain secure, scalable cloud infrastructure. The role includes line managing and mentoring junior colleagues.

You will build and scale a payments platform processing 100 currencies and a discovery engine for independent tourism businesses using Svelte, TypeScript, Python (FastAPI/Django), PostgreSQL, and AWS. You join a profitable, lean team of nine as one of the first engineers.

Atlassian★3.9 (61)· London

Leading a distributed EMEA team, you'll use Python, JavaScript, APIs, and microservices to build AI-powered solutions with generative AI, LLMs, and agent-based frameworks. The Forward Deployed Engineering team partners with top organizations to solve complex problems using Atlassian’s AI capabilities.

Too Good To Go★3.7 (14)· London

Spring Boot, Java 25, Kubernetes, AWS, React.js, TypeScript, Kotlin, and Swift. You will build and lead a new London engineering hub, delivering integrations and systems that power workflows for a marketplace app fighting food waste. As the founding Engineering Lead, you will recruit and manage a multidisciplinary team from the ground up.

Junior C# and ASP.NET developers will use SQL, .NET Core/Framework, JavaScript and Azure to build a centralized SaaS platform for FX payments, helping financial institutions manage compliance, costs and cashflow.

C# and .NET developers will build and maintain APIs and backend services for a connected home beer ecosystem spanning hardware, mobile apps, cloud services, and eCommerce—working with relational databases, Git, and desirable AWS or Azure cloud exposure.

You will work with Python (Django/FastAPI), TypeScript, React, Astro, Svelte, PostgreSQL, AWS, Terraform, and frontier AI models via Amazon Bedrock. You'll own technical direction, mentor engineers, and build AI products for UK public services in health, education, planning, and Parliament. The role is in small, empowered, cross-functional teams.

Founding Product Engineer role building an AI-native platform that automates financial operations for accounting firms, running a production AI agent fleet. You'll work full-stack with TypeScript, AWS, and Terraform, owning the full product lifecycle from architecture to direct-to-production shipping. The company is early-stage, backed by leading VCs, and based in London.

As a Node.js/TypeScript Engineer in Sainsbury's Martech domain, you'll work on the Multichannel Messaging Hub (MMH) team using JavaScript, TypeScript, Node.js, microservices, Kafka, Snowflake, Kubernetes, AWS Serverless, and Terraform. The team orchestrates campaign delivery across email

Work with Vue.js, React, Angular, JavaScript, HTML/CSS, Figma, and Agile (SCRUM/Kanban) to build reusable UI components and optimize performance. Join the TransPerfect TechOps team delivering the GlobalLink platform and client interfaces.

You'll work with Node.js, React, TypeScript, APIs, cloud platforms (AWS/Azure/GCP), and CI/CD tools. The role is on a product team building a high-traffic global eCommerce platform processing thousands of daily transactions, developing customer-facing features and improving performance.

Build scalable solutions using C#, .NET and SQL for a global hedge fund’s trading, risk, pricing, and quantitative research platforms. You will collaborate with quantitative and investment teams on real-time, mission-critical systems.

Work across the full stack using Vue, TypeScript, JavaScript, Node.js, AWS, and various databases on a cutting-edge platform within a small, collaborative engineering team.

Python, TypeScript, React and PostgreSQL power this Senior Full Stack Developer role. The work involves building and owning a flagship AI platform that handles large-scale data processing, entity resolution and production AI workflows within a small, experienced engineering team.

BlackRock★3.8 (632)· London

Develop software with .NET, .NET Core, ASP.NET Core, C#, Entity Framework, SQL, REST APIs, Postman/cURL, and Git. You will build a new product from the ground up to drive digital transformations in the private equity industry.

You'll work with Python, TypeScript, LLM-powered systems, AI agents, and data pipelines. This London AI startup builds an evaluation layer and platform for strategic finance teams to automate complex modeling and analysis. As founding engineer/CTO, you'll own the entire technical stack and architecture as the first engineering hire.

You'll work with Python, FastAPI, TypeScript, React, and GCP, building services, data models, and APIs for a behavioral simulation platform that creates digital twins of populations. The team of 17 owns complex systems from design to deployment, orchestrating foundation models and data pipelines for major organizations.

Develop AI compilers using LLVM-based technologies, C++, and GPU architectures, with experience in MLIR, Triton, or similar frameworks. The role supports an HPC and AI R&D firm's compiler projects, collaborating with a highly experienced engineering team on advanced technology.

Build and deploy production-grade agentic systems and RAG pipelines using Python/FastAPI and TypeScript/React. Lead the architectural development of an AI-driven agency model, replacing manual workflows with autonomous agents for the global property market.

Build AI agents, workflows, and automations using LLMs, retrieval, tool calling, Python, TypeScript, and JavaScript. The role focuses on building AI-native systems for BJAK’s AI Neobank app, applying AI to financial workflows like onboarding, KYC, risk review, and operations.