76 to 100 of 185 Software Engineering Jobs in the City of London

Software Engineer Onsite role in Soho £80-120k depending on experience We’re on a mission to reinvent how AI understands people — not through CVs or data points, but through story, reasoning, and curiosity. We’re building systems that listen, interpret, and understand why people say what they ...

Backend Software Engineer/Developer (Go/Golang AWS) London to £80k Are you a data savvy, backend focussed Software Engineer who enjoys using a range of programming languages with exposure across the full tech stack? You could be progressing your career working on bleeding edge, Machine Learning … powered, audio fraud detection software used by all UK banks, the emergency services and a range of other clients to prevent and detect fraudulent call activities. As a Software Engineer you'll join a collaborative Agile team responsible for building and maintaining the critical, cloud (AWS) based data ...

Senior Software Engineer Key Technologies: C#, .NET, React, JavaScript, Typescript, AWS, Docker City of London, United Kingdom Perm Role: £80,000 - £120,000 Harrington Starr has partnered with a Global Financial Services Vendor and they are looking for a Senior C#, .NET Software Engineer to join their growing … UK. This role offers hybrid working, with an office location based in the City of London. This role will suit a Senior Software Engineer, with expert C#, .NET experience having a direct impact from the get-go. ...

Software Engineer London/Hybrid | Perm Role £60,000 - £80,000 Harrington Starr has partnered with a fast-growing fintech that’s transforming how businesses manage foreign exchange and treasury operations. Their technology enables clients to access institutional-grade execution, automate manual workflows, and gain greater transparency across their … product offering and deliver cutting-edge solutions that help clients manage risk more effectively. The Role This is an excellent opportunity for an experienced Software Engineer — ideally with a background in financial technology or FX — to join a high-performing engineering team within a scaling fintech. ...

expanding to London—and looking for our first engineer on the ground to help us do it. About the Role This is a senior engineering role. You'll be the first CGCG engineer in London, which means you won't just write code—you'll help shape … build, hire, and operate as we grow our UK presence. You'll work closely with our US-based engineering and leadership teams while laying the groundwork for what comes next in London. The role starts fully remote. Once we establish a London office, it will transition to hybrid. What ...

Senior Software Engineer Central London | Hybrid £100k–£140k + bonus + equity Python, Databricks, AWS/GCP, Kubernetes We’re hiring a Senior Software Engineer to join a well-funded data business operating in the government/intelligence space. This Senior Software Engineer role sits within … Core Engineering team, working on a high-scale data platform analysing complex transaction data. It’s a technically challenging environment with real-world impact. As a Senior Software Engineer, you’ll optimise ETL/ELT pipelines (batch & streaming), improve architecture and latency (with a big focus on this ...

larger customers - this is an excellent time to be joining for someone with ambitious career goals. Senior Frontend Engineer Requirements: 3+ years’ experience software engineering experience working within high scale product led environments Evidence of building attractive Frontend features and products from 0-1 Evidence of leadership ...

product practice delivering impactful digital services for high-profile clients. The organisation specialises in combining data-informed decision making, human-centred design and modern software engineering to solve complex problems and create meaningful outcomes for users and organisations alike. This role sits at the heart of multidisciplinary delivery ...

Role : Fullstack Engineer (x5) Location : London (onsite) Salary : £100k - £130k A very exciting high-growth startup who are building AI-powered software in the industrial space. They've already got fantastic traction and are working on cutting-edge technology. You'll own full-stack features end-to-end, have … most impactful projects. Work end-to-end on product development from architecture design to UI You Must Bring: 3+ years of experience in software engineering Experience building products in a high-growth environment You must bring some founding experience (0- 1) , building a product that has generated revenue. ...

key. There is strong end-to-end ownership and clear visibility across the full trading stack. They are looking for someone with a solid software engineering background and several years of experience (typically around 3–7). Experience with trading systems or DeFi is beneficial but not required. … Familiarity with ecosystems such as Solana, Sui, or Cosmos Experience diagnosing performance, latency, or throughput issues Interest in product design and user experience alongside engineering ...

Senior Software Engineer Key Technologies: C#, .NET, React, JavaScript, Typescript, AWS, Docker City of London, United Kingdom Perm Role: £80,000 - £120,000 Harrington Starr has partnered with a Global Commodities Brokerage and they are looking for a Senior C#, .NET Software Engineer to join their growing front ...

Senior Full Stack Developer We are looking for a high-caliber Senior Full Stack Developer (L5 equivalent) to join a specialized innovation 'incubator.' Our mission is to accelerate the AI transformation of global business operations ...

this by building dApps that arent constrained by individual blockchain capabilities. As the newest Product Manager, you will act as the connective tissue between engineering, design, and external partners. You will own the problem space, drive clarity and push execution from 0-1 and beyond. Responsibilities … needs by staying engaged with developers, partners and integrators Drive momentum and take ownership for outcomes Requirements: Computer science degree or equivalent technical background Software engineering experience Clear and proactive communication skills Comfortable in a fast-moving, low-process environment Bonuses: Competitive Salary Bonuses up to 20% Remote ...

Backend Software Engineer - Core Business Systems (CBS) STS Digital (www.stsdigital.io) is a leading regulated digital asset trading firm specialising in OTC trading and market making. While trading is headquartered in Bermuda, technology development is provided by a global engineering team. We are seeking a Backend Software Engineer … business, including accounting, reporting, treasury automation, and trade lifecycle management. The engineer will work closely with the CBS Team Lead and other engineering teams to deliver reliable, auditable, and scalable backend services. Primary Responsibilities: Design, implement, test, deploy, and maintain backend services supporting core business operations. Develop and enhance ...

unparalleled scale, reliability, and resilience. This is where you come in... They are looking for an exceptional C++ Engineer to join their most critical engineering group across the whole firm. This elite team of engineers is responsible for developing all of their on-exchange proprietary trading technology—the single … kind of engineer who knows what’s going on under the hood and thrives on working at the lowest levels of software engineering—borderline hardware. Your expertise includes some blend of modern C/C++ with the following: Operating systems (Linux Kernels) CPU architecture GPU programming Assembly Language ...

Contact Centre/Amazon Connect - Software Engineer Amazon LEX engineer. Contract | 12 months | Hybrid (UK‐based) Up to £700 per day Inside IR35 We’re partnering with a major UK enterprise expanding its AWS Contact Centre engineering capability. The team is building new features and services across multiple … Amazon Connect instances and needs hands‐on Senior Software Engineers who can design, build and support scalable, production‐grade solutions. This role is fully engineering‐focused — not an architect position . You’ll be coding daily, working with Amazon Connect, Lex, Lambdas and modern TypeScript/Python across ...

wellness and health solutions in Asia. Translate the platform's value into tangible business benefits for various markets. Job Requirements: Significant experience in enterprise software engineering/architecture. Proven track record leading multi-geography, multi-vendor technical collaborations. Deep understanding of cloud SaaS architectures and insurance/health ...

joining the Agent team - a small, high-calibre group building the systems and tooling that actually makes agents work in production. This is engineering embedded in research - the model team trains the models; the agent team builds everything around them. What you'll do Build and improve agent logic … turn ideas into production-ready agent behaviour Iterate quickly, experiment often, and own problems end-to-end What you'll need Senior-level engineering experience from a high-bar environment (top AI lab, scale-up, or Big Tech) Strong software engineering fundamentals and system design skills Interest ...

equity Hiring for mid-senior-lead levels! Tech Stack: Backend: Python (Flask, FastAPI) Frontend: React, TypeScript Cloud: GCP or AWS Do you like building software that actually gets used? Not demo-ware. Not slide-ware. Real systems, in production, powering real businesses. We’re partnered with a Series … company building automation software embedded directly into the operational core of fast growing organisations. This is production critical, customer facing, revenue impacting software used daily at scale. This is a hands on role for engineers who want ownership, speed, and genuine influence over product direction. No endless layers. ...

onboarding to secure SSO and real-time data integrations, Connect is helping frontline organisations empower their people at scale. We’re looking for a Software Engineer to help shape and build the next generation of Connect. You’ll work as part of a multidisciplinary team across engineering, product … automated unit and integration tests within our CI/CD pipeline Contribute to technical planning, estimation, and documentation Continuously improve our development processes and engineering standards WHAT YOU’LL BRING Strong experience in C# and the .NET ecosystem Experience building scalable, secure applications in Azure (Service Fabric, Cosmos ...

C#, .Net, TypeScript, JavaScript Hybrid, 1-2 days near Liverpool Street Up to £90,000 + bonus + benefits If you enjoy solving complex engineering problems, learning from highly capable peers, and working on a product where your contribution genuinely matters, this is an opportunity to do exactly that. … early investment phase with strong growth ambitions, offering real scope for progression and the chance to help shape both the product and engineering direction. You'll be part of a bright, collaborative team of talented software engineers and academically strong problem-solvers who value clean design and thoughtful ...

speak with motivated individuals looking to build a successful career in recruitment. Our client are a highly successful global recruitment agency specialising in blockchain, software engineering and IT . But dont worry, you dont need prior knowledge as they will teach you all you need to know … join? Uncapped commission structure up to 40% Incredible training programme and annual individual learning budget allocated to everyone Investment in leading recruitment technology and software Progression based off your performance, rather than years of experience Vitality health insurance Discounted gym membership Spin the wheel prizes Birthday off work ...

solve the most complex challenges in high-DOF autonomous systems and embodied AI. We are looking for experts across: AI/Machine Learning MLOps Software Engineering Data Science The Environment The mission is driven by high-bandwidth, in-person collaboration. This is a 5-day-a-week, onsite … Term Impact: Permanent positions with the autonomy to shape a global platform. Randstad Technologies Ltd is a leading specialist recruitment business for the IT & Engineering industries. Please note that due to a high level of applications, we can only respond to applicants whose skills & qualifications are suitable for this ...

Senior Software Engineer Location: London - Hybrid Salary: £70,000-85,000 Tech stack: Typescript & Node.js Maxwell Bond have partnered with a leading SaaS business who are looking for a Senior Software Engineer, with a focus on frontend development, to join their team. You'll work … largest complex platforms for an enterprise client, being hands-on throughout the full software development lifecycle. What you'll do as Senior Software Engineer: Design, build and maintain full stack development for an enterprise platform, taking ownership from initial design through to production. Work with modern tech stack ...

Lead Software Engineer – Java Microservices | London (1 day per week on-site) | £74,000 – £92,000 + Package We’re partnering with a leading UK bank to recruit a Lead Software Engineer with strong Java and microservices expertise. This is a hands-on role building high-performance, scalable … software for real-world, high-traffic systems. About the Role You’ll join a permanent feature team, taking end-to-end ownership of services, from design and development to testing, deployment, and optimisation. Your focus will be on building robust microservices that support high-traffic user experiences, serving thousands ...