5 back end engineer jobs found

Applied AI Engineer - Financial Services AI - Outside IR35 - Remote The Applied AI Engineer will be responsible for designing and deploying production AI applications for investment, credit and portfolio management teams, building enterprise LLM solutions that integrate internal and third-party data to support AI-driven financial workflows. Applied AI Engineer - Key Skills: - Proven experience building production AI applications using LLMs within Financial Services (Investment Management, Investment Banking, Asset Management, Hedge Funds, Private Credit or similar). - Must have strong understanding of RAG architectures, AI agents and enterprise AI systems, including document parsing, chunking, retrieval, re-ranking and orchestration. - Strong Python experience building production AI applications, Back End services and APIs. - Strong Azure experience, including Azure OpenAI and cloud-native AI services. - Experience deploying production AI systems using Kubernetes,...

Who are OnCommerce?   OnCommerce is a global selling platform that powers a growing network of retail channels, including: OnBuy - The only marketplace in the world to give customers instant Cashback on everything easyShop - An all-new marketplace created in collaboration with the easy® family of brands Comet - The iconic UK tech brand making its return later this year   OnCommerce is growing fast, launching new brands and scaling to power the future of ecommerce.   Be Part of the Story OnCommerce is constantly evolving. Everyone here plays a hands-on role in shaping what comes next, building brands that make an impact across global markets. There’s no red tape or rigid corporate structure; just smart people taking ownership and figuring things out as we build something big together. The pace is fast, priorities shift, things aren’t always perfectly set up, and you’ll often need to get stuck in and...

Senior Software Engineer - Kotlin £550-£650 per day | Outside IR35 Hybrid | London (3 days onsite) A leading UK financial services organisation is seeking a Senior Software Engineer to play a central role in a large-scale platform transformation programme. The business is rebuilding a critical part of its digital infrastructure to support a broad range of transaction methods and channels across both in-person and digital environments. This is hands-on Back End engineering at scale, with real ownership and direct exposure to architecture decisions from day one. Key Responsibilities as a Senior Software Engineer: Design and build Kotlin Back End services for a new payments platform Own the architecture and design of key components, taking high-level requirements and turning them into structured, deliverable backlogs Write clean, well-tested, production-ready code that the team can rely on Work closely with Product and Engineering to break down complex...

AI Integration Engineer (Defence & National Security) Location: London (Hybrid) Contract Rate: £600/day (Outside IR35) Requirement: Active UK SC Clearance (Mandatory) We are hiring on behalf of our client, a specialised defence consultancy, who is looking for an AI Integration Engineer with active SC clearance to join them on a contract basis in London. Key Skills Required Active UK SC Clearance (Mandatory - applications without this cannot be considered) Core Engineering: Strong Back End development skills (Python, Go, or C++) with solid API design and data pipeline experience AI Tooling: Hands-on experience integrating LLMs, handling vector databases, and building robust chunking/embedding strategies Secure Architecture: Deploying LLM pipelines, RAG systems, and orchestration layers within secure, classification-bound environments Local Implementations: Self-hosting, optimising, and containerising open-source models (eg, Llama,...

🚨 Senior Playwright SDET | £700/day | Outside IR35 | Front Office Trading | London I'm working with a leading global investment bank looking to hire an exceptional Playwright SDET to join their Front Office Derivatives Technology team. This isn't your typical automation role. You'll be embedded within a high-performing engineering team, working directly alongside developers on a strategic front end trading platform. The rate reflects the calibre of engineer they're looking for. 💰 Package £700 per day Outside IR35 12-month rolling contract 1 day per week in the London office What they're looking for This role is suited to a highly technical SDET who is passionate about automation and enjoys writing production-quality code. You must have: ✅ Strong commercial experience with Playwright ✅ Excellent coding skills in JavaScript and TypeScript ✅ Experience building and maintaining automation frameworks ✅ Previous experience working on...