full stack ruby engineer jobs in London

Harnham is seeking an Engineer to own software across front-end and back-end within an AI-first fintech environment. You will build customer-facing web applications and contribute to Kotlin/Spring backend services while integrating AI-driven workflows.Join a scale-up with Agile squads, delivering secure, scalable software and collaborating on APIs,...

Stantec Inc. is seeking a seasoned Senior Full Stack Developer to join our engineering team in the UK. You will balance robust Python backends with sophisticated frontends and AI-driven architectures.You will design and maintain scalable web apps, using Django or similar frameworks, and build dynamic interfaces with Angular, HTMX, and Alpine.js. A strong...

Lindus Health is seeking a software engineer to help power the next generation of clinical trials from our London office. The role blends frontend (TypeScript/React), backend (Python/Node.js/Postgres), and infrastructure (AWS) in a fast-moving, VC-backed startup.You’ll join a small, cross-functional team, work on the Citrus trial delivery platform, and...

Neo4j in London is seeking a software engineer with deep frontend expertise to join our Graph Engine team. React will be your core strength, but this is a genuinely full-stack role spanning backend, cloud, and connectivity.You'll guide the UI's technical direction, collaborate with engineers across the stack, and mentor others as you contribute from frontend...

Preply is seeking a Senior II Full-Stack Engineer (backend heavy) in London. You will work in a hybrid, engineering-focused environment to deliver scalable backend systems with Python/Django and frontend in React/TypeScript.The role emphasizes technical leadership, mentorship, and data-driven product development within a fast-growing EdTech platform that...

We power people’s progress. At Preply, we’re all about creating life-changing learning experiences. We help people discover the magic of the perfect tutor, craft a personalised learning journey, and stay motivated to keep growing. Our approach is human-led, tech-enabled - and it’s creating real impact. We’ve just reached unicorn status with a $150M...

SmartChoice International GCC in London is seeking Forward Deployed Engineers to own features end-to-end, working directly with customers to translate complex workflows into scalable software solutions.You will build across the full stack, including frontend, backend, data models and AI/model layers, and ship production software quickly while iterating on...

Build market leading technology products that are secure, scalable, and built for performance. You will work in a cross‑functional agile team that continuously improves how we design, build, deliver, and operate enterprise solutions. This role gives you the opportunity to deepen your full stack skills while solving real business problems across multiple...

Harnham - Data & Analytics Recruitment seeks a Full Stack AI Engineer on a contract basis. Must have SC Clearance, work fully remote in the UK, and operate outside IR35. Immediate start with day-rate £500–£550.You will design and develop full-stack AI apps, build interfaces and APIs, deploy LLM-powered solutions, and manage data stores. Experience with...

What You'll Be Doing Building and enhancing front-end trading and workflow applications using React, TypeScript and Java. Developing and maintaining backend services supporting order routing, execution workflows and trading infrastructure. Partnering closely with quantitative research, execution and trading teams to deliver new functionality and platform...

Senior Full Stack Developer (Front Office Trading)6-Month Contract London / Hybrid Working Competitive Day RateThe OpportunityWe are currently seeking an experienced Senior Full Stack Developer to join a high-performing Front Office technology team within a leading global investment banking environment.You will play a key role in the development and...

🚀Senior Full Stack Engineer – Java/Kotlin&React 📍London | Hybrid 🏦Tier 1 Investment Bank | Prime Finance We are partnering with a Tier 1 investment bank on a major, multi-year transformation of its Prime Finance Equities platform. The Equity Accelerator programme is re-engineering core trading and post-trade systems, replacing legacy...

Join us as a Software Engineer, Full Stack This is an opportunity for a technically minded individual to join us as a Software Engineer You’ll be designing, producing, testing and implementing working software, working across the lifecycle of the system Hone your existing software engineering skills and advance your career in this critical role What...

Build and own polished full-stack product features from problem definition through production. Responsibilities include making interface decisions, developing with Python, FastAPI, PostgreSQL, Next.js, and TypeScript, using AI and LLM tooling, modeling production data, writing SQL, safely changing live data, and working autonomously with users and...

Lead Software Engineer, Full-Stack Applications – AI FluentFitch Ratings is seeking a Lead Software Engineer to join our global Ratings Technology team in London. This is an opportunity to build mission-critical platforms while helping shape the next generation of technology that powers how a world-leading credit ratings agency delivers insights. In this...

CPC Project Services LLP in London is recruiting a full stack Software Engineer to join our team. You will combine technical acumen with a focus on user experience to build software for control rooms supporting the operational rail environment.You’ll work with rail domain experts to translate needs into robust software, tackling frontend, backend, and...

This role is with one of Dex's trusted partner companies. We work closely with their teams to truly understand their culture, goals, and what they're looking for, so we can match you with the right opportunity and give you context about the role before you commit to a process. If you're interested sign up to Dex to apply. Dex is an AI recruiter agent that...

LocationUK or Netherlands Tech StackRuby, Angular, TypeScript, SASS, design system, Contentful, GitHub Actions FocusHands‑on full stack product work, with room to grow into frontend About Tech At Bloom & Wild GroupWe're Europe's largest direct‑to‑consumer flower and gifting business (Bloom & Wild, bloomon and Bergamotte). Our Tech team builds the...

About Portal BiotechPortal Biotech has built the world's only platform capable of sequencing full-length proteins at the single-molecule level. Using our nanopore technology, we read intact proteins of any size, capturing both sequence and post-translational modifications in a way no other system can. This opens up entirely new ways to understand protein...

Company DescriptionWise is a global technology company, building the best way to move and manage the world’s money.Min fees. Max ease. Full speed.Whether people and businesses are sending money to another country, spending abroad, or making and receiving international payments, Wise is on a mission to make their lives easier and save them money.As part of...