backend engineer jobs in Islington

Senior Backend Engineer Salary: £120K - £140K + Equity Location: London in office Data Idols are working with a rapidly scaling software company who are looking for a Senior Backend Engineer to join their team. The product sits at the intersection of AI systems, complex data workflows, and enterprise-grade reliability, turning sophisticated technology into tools that can be trusted in...

You will architect "Tier 0" services that filter and protect content across Who You Are * Expertise: Deep knowledge of Java and Python. The Stack: Experience with Ray, Apache Beam/Scio, dbt, and BigQuery. Mindset: Comfortable leading in ambiguous problem spaces and delivering end-to-end solutions at scale.

Senior Backend Developer Salary: Up to £90,000 per annum Client: Leading Data Centre Provider We're working with a well-established Data Centre Provider to recruit a highly experienced Senior Backend Developer. This is a remote role open to UK-based candidates, offering the chance to work on large-scale systems that support critical national infrastructure. This is an excellent opportunity for...

x3 Founding FS Engineer (Python, NextJS, TypeScript) ‍ (AI/LLMs) Salary up to £120k + Equity London - 2/3 days a week Can sponsor candidates already in the UK ✅ Opportunity to join a VC backed startup, building the future of LegalTech. ‍⚖️ With operations based in both the UK&US and partnerships with the biggest Law firms. Working with LLMs to automate workflows and creating agents to handle...

Senior / Lead AI Engineer – AI-First Product Platform Tech4Good Location: Remote-first (UK) | London preferred Salary: Negotiable Engagement: Permanent preferred (contractors also considered) I’m working with a high-growth, product-led technology company that is embedding AI at the core of its platform rather than treating it as an add-on. They already operate a mature, production system and are...

Job Title: Digital Systems Engineer Location: London / Hybrid Salary: £45,000 - £55,000 per annum based upon experience plus discretionary bonus and comprehensive benefits Job Type: Full Time, Permanent techUK Overview: techUK is the trade association which brings together people, companies and organisations to realise the positive outcomes of what digital technology can achieve. With over 1100...

IBM DataPower Engineer – Mainframe Modernisation (Contract) We’re recruiting for an experienced IBM DataPower Engineer to support a large-scale mainframe modernisation programme within a complex enterprise environment. This is a contract role, ideal for specialists in secure API integration and legacy-to-digital transformation. The Role You’ll design, build and support high-performance...

Lead Software Engineer Stealth AI Fintech Startup | London | Hybrid (3 days on-site) We’re hiring on behalf of an innovative Fintech startup that is building an AI-driven platform that’s rethinking how investors analyse, access, and manage alternative assets (e.g. private equity, private credit and other private markets). They've built there MVP, raised funding from experienced fintech founders...

You will own engineering execution for a platform that processes large datasets, supports distributed computation, and integrates machine‑learning capabilities at scale. The engineering organisation already uses AI‑assisted development, and you will refine these practices, improve delivery predictability, and strengthen the technical foundation for long‑term growth.

You will provide solutions across both Azure and AWS technologies and importantly have a demonstrable background in C#.

Senior Full Stack Developer – Java & React Build Products That Shape High‑Stakes Decision‑Making I have partnered with a fast-growing tech firm who are building AI powered tools used by Fortune 500 business leaders. They are enabling them to make critical decisions across the business and have reportedly been ranked as #1 in their field! They’re scaling quickly, backed by major investment, and...

London (In-Office) | £110k - £150k + Founding Equity Most AI companies are currently building "chatbots." This team is building an autonomous orchestration layer for a high-stakes, physical industry. They aren't just processing text; they are managing bidirectional, real-time data streams where latency and reliability are the only metrics that matter. With £35M in funding to date, they are past...

Overview We're hiring a Founding / Senior Software Engineer to join a well-funded, early-stage AI product team based in London. This is a hands-on, high-ownership role for someone who enjoys building real products from the ground up and wants meaningful influence over technical direction, architecture, and delivery. The product is already live, customer-facing, and built around applied AI...

Frontend Engineer 3-6 Month Rolling Contract | Inside IR35 Our client is building something new, exciting, and at the cutting edge of digital technology. They are looking for ambitious, talented, and creative software engineers to join their growing Digital team and help shape the next generation of products and experiences for customers. They're looking for Frontend Engineers who are...

We’re looking for a Senior-level Software Engineer with strong JavaScript/TypeScript skills and experience across modern web stacks. You’ll be instrumental in our transition away from Drupal as we modernise and scale our platform. Tech Stack: At least 6-8 years commercial experience with JavaScript or TypeScript and Node Exposure of Laravel and/or Python (Django or Flask a...

You will take a lead role in building high-quality, accessible, and maintainable front-end solutions across a single-page admin platform and a progressive web application. Working closely with UX, design, and backend developers, you will help shape front-end architecture, improve performance, and mentor other engineers.

Data Engineer – SC Cleared - AWS - Inside IR35We are supporting a major government data transformation initiative to strengthen the use of evidence-based insights across frontline and operational teams. As part of a new capability being built to process and analyse sensitive interview information, the programme requires Data Engineers to design, deliver, and optimise secure backend data...

You will own the lifecycle of services that handle identity verification, risk assessment, and onboarding for a global partner base.

Junior / Mid Level Data Engineer - SC Cleared Inside IR35: £450 - £500 per day Hybrid: Once a week in London Start date: ASAP We are supporting a major government data transformation initiative focused on strengthening the use of evidence-based insights across frontline and operational teams. As part of a new capability being built to process and analyse sensitive interview information, the...

Full Stack Software Engineer | London | £80,000 - £150,000 | Python | React Location: London-based (hybrid) Salary: £80,000 - £150,000 + equity Tech Stack: Backend: Python (Flask or FastAPI or Django - ideally a blend of 2) Frontend: React, TypeScript Cloud Systems: GCP or AWS Are you a software engineer who enjoys shipping real products, solving tangible customer problems, and seeing your...