Ebury★3.3 (13)· London

Senior Software Engineer (Money Flows) at Ebury (London, hybrid) will work with Python, Django, FastAPI, PostgreSQL, Kafka, AWS, Kubernetes, Terraform, Jenkins, Prometheus, and Kibana. The role owns development, scalability and optimisation of the company’s multi-currency account systems, incoming funds, and outgoing payment processes on its core transactional platform. This is a global team spanning Europe and South America.

Citi★3.9 (21k)· London

You will work with C++, C#, .NET, Java, Python, kdb, and SQL to develop analytics libraries and pricing models using Monte Carlo methods and PDE solvers. The role focuses on creating quantitative models for Citi’s cross-asset XVA and capital analytics, supporting trading business pricing and risk-management. You will collaborate with Traders, Structurers, and technology professionals.

You'll use Zapier, Make, n8n, Python or JavaScript, APIs, SQL, and webhooks. You'll own the automation layer for influencer marketing, building workflows for discovery, onboarding, contracts, content tracking, reporting, and payments.

Work with Java and/or Python to support the design, development, and maintenance of scalable applications. You will join the front-office engineering team of a fintech firm to help deliver high-impact, revenue-facing systems used by traders and product teams.

You will work with PHP, MySQL, HTML5, CSS, JavaScript, jQuery, React, Next.js, Laravel/Symfony, DevOps/CI/CD tools (Jenkins, Bamboo), Docker, and AWS. The team creates experiences through data and media management and data analytics engines, working on complex development for both industry-leading companies and startups.

Develop React applications using TypeScript and Node.js, running on Azure AKS with Azure PostgreSQL. Work with Terraform and Harness CI/CD pipelines, integrate RESTful APIs, and create end-to-end automation tests with tools like Selenium or Playwright.

JPMorgan★3.9 (20k)· London

Work with KDB, Q, AWS, and optionally Terraform, Kubernetes, Python, C, C++, or Java. Develop and maintain applications storing large Options data sets for real-time and historical access within JPMorgan’s Equities Trading Data & Analytics team, migrating to AWS and re-architecting systems.

Lovable★4.0 (43)· London

As the first data scientist in Lovable's new London growth team, you'll own the growth funnel end-to-end and work directly with growth engineers to ship experiments. You'll use SQL, Python, BigQuery, PubSub, Hex, and A/B testing on GCP, building the metrics and systems that drive acquisition, activation, retention, and expansion.

Wise★3.5 (42)· London

You will work with Java, Spring Boot, AWS, Apache Kafka, and potentially Trino. The Pricing Core team builds and maintains the main pricing platform that enables Wise to price its products, processing over 100 million requests daily across critical paths.

You will work with Svelte, TypeScript, Python (FastAPI/Django), PostgreSQL, and AWS. Tab is a YC-backed London startup building a high-scale payments and discovery platform for independent tourism businesses. You will be one of the first developers on a lean, profitable team of nine.

You'll build core AI systems with FastAPI, TypeScript, React, LLMs, and voice interfaces, plus own infrastructure, observability, and evaluation frameworks. Fleetcraft is a London aerospace startup creating AI infrastructure for aircraft maintenance and manufacturing, with you shaping the technical roadmap end-to-end.

You will work with C#, Python, TypeScript, JavaScript, React Native, AWS or Azure, and various databases (relational, graph, document, key-value) plus SQL. The role supports critical projects aligned with Net Zero ambitions.

You will work with Java, Spring Boot, microservices, REST APIs, AWS, DevOps and CI/CD pipelines. You’ll lead client projects for a global technology consultancy, mainly in financial services, focusing on migrating legacy systems to AWS and introducing cloud deployments. As Principal Java Developer, you will lead projects, but team size isn’t specified.

Build UI components using Vue.js, React, or Angular, plus JavaScript, HTML/CSS, and Figma. You'll join TransPerfect TechOps, which develops workflow improvements, core services for the GlobalLink platform, and scalable client interfaces. Work within an Agile (SCRUM/Kanban) team.

Use Vue.js/Nuxt.js, Node.js, TypeScript, MySQL, Docker, and AWS with AI-assisted tools like Claude. You will build and ship end-to-end features for &Dine’s online food marketplace connecting independent Makers and customers. Join a high-impact engineering team of four.

NatWest Group★3.7 (1.2k)· London

Leading a team building cloud-hosted, event-driven microservices at NatWest Boxed, you will manage software and quality engineers across empowered squads while working with AWS, Google Cloud Platform, Java, Python, JavaScript, ReactJS, AngularJS, Kafka, Hadoop, PostgreSQL, Snowflake, and GitLab.

Imperial College London★4.2 (238)· London

You will use statistical software for data analysis in the MFI study, a clinical trial comparing modafinil with placebo for fatigue in people with inflammatory bowel disease. The role involves recruiting patients across London hospitals, leading follow-up visits, and managing the study database within the Department of Brain Sciences.

Broadstone Corporate Benefits★4.2 (9)· London

You will work with AI models, generative AI, automation tools, Microsoft 365 Copilot, Foundry, and Power Platform to build and deploy AI automation solutions. As AI Enablement Lead at a pensions, investments, and employee benefits consultancy, you own the use-case pipeline from discovery through delivery. The listing does not state the size of the team you would lead.

Chubb Insurance★3.7 (1.3k)· London

Lead the design and enablement of Chubb’s Finance, Risk, Actuarial, HR and Legal platform architectures. Work with Azure, GCP, Python, Angular, microservices, API mediation, and event bus models. Drive enterprise architecture modernization and AI-SDLC practices.

Capgemini★3.7 (11k)· London

You will work with ITIL 4, ServiceNow, Jira Service Management, Freshworks, Azure, AWS, Google Cloud, AI/automation and AIOps tools. As a consultant in Capgemini Invent’s Cloud Advisory unit, you support clients in modernising service management and operations through cloud, AI, and automation adoption.

SS&C★3.2 (1.7k)· London

Design, develop, and maintain automated test suites using C#, BDD frameworks (SpecFlow/Reqnroll), GitHub Actions, Playwright, and Selenium WebDriver. You will integrate AI-powered tools like Claude Code and GitHub Copilot to accelerate testing across Calastone's financial products, a global funds network.

You'll work with CI/CD pipelines, cloud platforms (AWS, GCP, Azure), Git workflows, APIs, and the command line, plus bonus tools like GitHub Actions, GitLab CI, and Kubernetes. As a post-sales technical advisor, you onboard, configure, and optimize CodeRabbit's Gen AI–driven code reviewer for commercial customers within their development workflows.

Macquarie Group★3.8 (315)· London

In this role you will work with AWS and/or Google Cloud, LLMs, agentic systems, tool-calling, workflow orchestration, and evaluation frameworks. You will lead the global applied AI strategy for Macquarie's Commodities and Global Markets division—a group that helps clients manage financial and commodity market risks, access capital, and trade global markets—turning AI experimentation into scalable, controlled enterprise capabilities. No team size is stated.

Atlassian★3.9 (61)· London

Leads a team of forward-deployed engineers building AI-powered solutions with Python, JavaScript, APIs, microservices, and LLMs. The team partners directly with top organizations to apply Atlassian’s AI capabilities to solve real-world problems.

EXL Service★3.7 (2k)· London

You will work with Generative AI tools (OpenAI, LangChain, Hugging Face, Vertex AI, Bedrock), LLMs, vector databases (FAISS, Pinecone, ChromaDB), and Python frameworks (Transformers, PyTorch, scikit-learn). As part of EXL’s Data Science Team, you’ll build and deploy GenAI solutions for enterprise use cases such as customer service, document automation, summarization, and knowledge retrieval.