Senior Java Software Engineer jobs in Islington

Senior Software Engineer Node.js / AWS / React London (Hybrid, 3 days onsite) Are you the kind of Senior Software Engineer who enjoys taking something fast-and-scrappy and turning it into something scalable, elegant, and genuinely robust? This is a chance for a Senior Software Engineer to join a small, but ambitious tech-for-good / IoT startup based in the London City Centre thats building...

Backend Software Engineer / Developer (Windows C / C++, C#) London to £70k FTC Are you a skilled Backend Software Engineer with strong C++ skills? You could be progressing your career in a senior, hands-on role at a global market data provider whilst enjoying a range of perks and benefits. As a Backend Software Engineer you will join an Agile team focussed on building and maintaining Exchange...

I'm looking for a Contract Java Software Engineer to join my client in their FinTech Business Unit. 6 month | Inside IR35 | Hybrid (1x week London) | £550 per day What you'll do: Develop scalable, high-performance systems and microservices Solve complex technical challenges and advocate best practices Support compliance processes with advanced tooling and analyticsRequirements: - Java + least...

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...

Job Title: Senior Java Engineer (Smart Contract) Location: London Contract: 12 Months Are you a passionate Senior Java Developer looking to make a significant impact in an innovative environment? Our client is seeking a talented individual to join their dynamic team in London, where you'll design and develop cutting-edge microservices for a next-generation loans processing application. If you...

You will gain experience which will enable your career to take a leap forward.

You will deliver high-quality production code and design control system architectures for real time environments that support robotic movement, manipulation, and teleoperation.

You will be rewarded with an excellent package that includes:

Senior Software Engineer - .NET Core, Blazor, SQL Server Location: Remote (UK-based) Salary: £50,000 - £60,000 (depending on experience) Benefits: Company pension scheme, 25 days holiday + bank holidays Applause IT are recruiting for a Senior Software Engineer on behalf of a highly impactful, tech-driven not-for-profit organisation that's tackling one of the world's most pressing health...

You will be a significant hire and will own much of the development of a cutting-edge compiler development project. Significant hires have already been made in the team to support this role. Mostly LLVM based, it is important you also have experience working with GPUs to an extent.

You will have a learning and development budget to support this. Python, Java, TypeScript, JavaScriptReact, Angular, ReactKubernetes (k8s) DockerAWS, AzureElasticsearch, MERN, Neo4JBenefitsExcellent company benefits including significant pension contributions, BUPA, equity and training allowance.

Palantir Consultant£80,000 - 95,000 GBPHybrid WORKINGLocation: Central London, Greater London - United Kingdom Type: Permanent Manager - Data & AI (Palantir Focus) - UK WideSalary: £80,000-£95,000 per year (dependent on experience)Working Model: Flexible / UK-wide with client travel (up to 60%) A leading global professional services firm is expanding its Data & AI practice and is seeking a...

Software Engineer (stealth mode start-up) A stealth mode start-up, recently established by a team of highly experienced engineers and entrepreneurs with substantial financial backing and a proven history of successful technology ventures, is seeking software engineers with a minimum of 2 years of commercial experience to join as founding members of the initial team. These positions are perfect...

Software Engineer Stealth AI Startup | Seed Stage | On-site We’re hiring for an early-stage but fast-growing AI startup building a cloud-native analytics platform that turns large volumes of LLM output into structured, queryable intelligence for businesses and brands. Their stack is fully on AWS, heavily event-driven, and designed for scale. They work with modern serverless and...

Role: Software Engineer - Full-Stack - TypeScript, Node.js Location: London Working Model: Hybrid - 3 Days Salary: Up to £99,000 Ready to build tech that actually means something? This team is powering the next generation of electrification — EVs, solar, batteries, heat pumps, smart devices — all connected through a platform that’s scaling fast and rewriting the rulebook in green-energy...

You will play a critical role in building and evolving systems within a regulated payments / financial services environment, balancing engineering excellence and platform resilience. Key Responsibilities: Engineering Leadership & Strategy Own the software engineering strategy, aligned with business, product and regulatory objectives.

Golang Software Engineer - FinTech Scale-Up Location: London (Hybrid) Level: Mid-Senior About Us: We're a mature FinTech start-up revolutionizing financial services with cutting-edge technology. Backed by leading investors and operating at scale, we combine the agility of a start-up with the stability of an established business. The Role: We're seeking a Golang Software Engineer to join our...

At Conexus, we're not just building a company - we're developing careers. Every team member receives tailored training, ongoing coaching, and the support needed to become the very best version of themselves. You'll work with some of the world's most recognisable global brands across cutting-edge technology markets. About Us Conexus is an international specialist recruitment organisation focused...

Senior Software Engineer Node.js / AWS / React London (Hybrid, 3 days onsite) Be one of the first applicants, read the complete overview of the role below, then send your application for consideration.Are you the kind of Senior Software Engineer who enjoys taking something fast-and-scrappy and turning it into something scalable, elegant, and genuinely robust?This is a chance for a Senior...

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

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...

The Race to Zero: Senior Java Low-Latency Engineer (Fixed Income) 6 Months Contract London Hybrid Role Competitive daily rate. Our client "A premier global electronic trading powerhouse" is looking for a Java Specialist to lead a mission-critical shift in their E-Fixed Income (eFI) architecture. They aren't just looking for a "developer"-we need a systems artist who understands that in this...