51 to 75 of 103 Senior Software Engineer Jobs in the City of London

such as monitoring, fault detection, reporting and billing. Next, Metris is building proprietary AI to deliver autonomous operation of small-scale renewables. The Role We’re looking for a Senior Software Engineer with strong experience in data-intensive systems to join our team. You’ll bring a solid grounding in data processing and architecture, and will play … facing features . What You'll Do Own platform-wide data integrity : Design and maintain core data flows and pipelines that ensure reliable, accurate sensor and meter data. Build software that handles complex data : From ingestion to transformation to visualisation, you’ll work across the stack to make our data usable and valuable. Collaborate across teams : Partner with Product … features and improvements. Ensure robustness and consistency: Ensure all systems you design are fault-tolerant, scalable and correct using appropriate architecture and testing approaches. About You You’re a senior engineer who moves comfortably between building reliable software systems and thinking deeply about data architecture. You don’t need to be a dedicated data engineer or More ❯

Senior .NET Engineer - Fully Remote (with quarterly visits to London) - Up to £100k We're working with a leading Fintech company that specialises in developing payment platforms across a range of industries. As they continue to grow, they're looking to strengthen their .NET development team to drive forward exciting greenfield projects. With nearly a decade in the … industry, they have an impressive portfolio of clients. This role is ideal for Senior to Principal .NET Engineers who are eager to engage in architectural decisions, contribute to innovative designs, and challenge requirements with a proactive mindset, all while showcasing exceptional engineering skills. Key Responsibilities: Collaborate with stakeholders to refine and enhance solution design Develop scalable, reliable, and high … with quarterly visits to the London office Salary sacrifice pension plan Life assurance and private medical insurance 25 days annual leave plus a 5% performance-based bonus Apply today! Senior .NET Engineer - Fully Remote (with quarterly visits to London) - Up to £100k More ❯

Job Title: GPU Software Engineer Hybrid: 3 days onsite, 2 days WFH Skills and Qualifications: - Experience working in video processing or similar high-performance applications. - Proficiency in developing software using Vulkan or other modern GPU APIs. - Extensive experience in creating C/C++ code from scratch and improving existing codebases. - Ability to independently and quickly learn new More ❯

As a GPU Software Engineer, you’ll be translating innovative research into high-performance, high-quality GPU compute solutions—playing a key role in delivering next-generation media technology to the market. Hybrid working, 3 days onsite and 2 days working from home. Key Skills & Qualifications: Degree in Electronics Engineering, Computer Science, or a related field. Proven experience … platform solutions for operating systems including Windows, Linux, iOS, and Android. Enhance, maintain, and expand existing codebases (C/C Python). Integrate third-party commercial and open-source software components. Produce clear and well-structured technical documentation, including specifications, APIs, and integration guides. Support external partners and customers in integrating SDKs. Test and evaluate complex signal processing code More ❯

Job Title: Senior Software Engineer - HealthCare Location: London (Hybrid – 3 Days in Office) Salary: Up to £110,000 + Benefits Our client is entering an exciting scale-up phase following a successful Series B funding round. With fresh investment and strong market momentum, they’re rapidly expanding their team and capabilities to meet growing demand. This is More ❯

Lead Research/Trading Infrastructure Engineer - Global Quantitative Investment Firm - £200,000+ Compensation. A leading global quantitative investment firm is seeking a Lead Research Infrastructure Engineer to join its high-performance Infrastructure team. This hands-on role focuses on building and maintaining scalable, low-latency systems that support research and trading across global markets. Your specific responsibilities will More ❯

Title: Software Engineer (Fullstack/Frontend leaning) Salary/Package: £80k-£90k + Equity Company Sector: Fintech (Sustainability) Tech: TypeScript, Node, React, Next, GraphQL Location: Central London (London Bridge/Bank) WFH/Hybrid: 2 days a week on site We're teaming up again! 🎉 Bounce is back partnering with one of our favourite customers — the same awesome … fintech crew we placed three top-notch software engineers with in 2024. Fast-forward to 2025: they’ve kicked things off strong and are growing again 🚀 We’ve known the CTO for ages — genuinely one of the good ones. They’re making waves in the fintech space, bridging the gap between financial and sustainability data. Their platform makes it More ❯

We're looking for engineers who have solid core domain expertise and proven experience with: Thriving in fast-changing, dynamic environments Converting verbal or loosely defined requirements into working software Coding with a Minimum Viable Product (MVP) mindset Strong stakeholder engagement and team collaboration skills Role details: Location: Central London, office-based 4-5 days per week (due to More ❯

C# .NET Software Developer with FX and Fixed Income Our Client is a niche boutique broker specialising in FX. They are looking to recruit a C# .NET Software Developer with at least 3 to 5 years proven track record of developing with C# .NET. The Client would like meet candidates ideally with some understanding Trading Floor projects to More ❯

Job Title: Java Developer (Electronic Trading Platform - FIC) Contract Type: Outside IR35 Location: London Day Rate: Up to £850 per day Flexible Hybrid working: 1-2 days a week in London City offices Client: Prestigious Investment Bank Industry: Investment Banking More ❯

Senior Software Engineer (React, Node.js, AWS) Salary: £90,000 - £110,000. Location: Hybrid in London. Senior Software Engineer (React, Node.js, AWS) - would you like the opportunity to work for a market leading organisation, currently looking to revolutionise the data space? You will be joining a technology team who have a passion for innovation, collaboration … as well as embracing new ideas, technologies and approaches. As a Senior Software Engineer, you will be working closely with Product and design, taking full responsibility and ownership from conception to post-deployment. The company has grown significantly in the last few years and are looking for someone who can join in the process of growing their … building a web application from scratch. · Ideally looking for Backend focused Engineers who are comfortable across the stack so must be happy working this way. If you're a Senior Software Engineer with strong experience working in JS/TS, please apply. More ❯

in our second year, we have ambitious growth plans and are searching for the best and brightest minds from across tech and finance to help us achieve our aim. Senior Software Engineer We are seeking a highly experienced and results-oriented Senior Software Engineer to join our growing team. This is a critical role … the team, identifying areas for improvement and driving innovation. Problem Solving: Tackle complex technical challenges and develop creative solutions. Shipping Products: Demonstrate a proven track record of successfully shipping software products to production. Requirements Extensive Software Engineering Experience: A minimum of 5+ years of professional software engineering experience, with a demonstrable track record of delivering high-quality … software products. Strong Python Skills: Excellent proficiency in Python programming. Focus on Code Quality: A deep understanding of software engineering principles and a passion for writing clean, well-tested, and maintainable code. Product Delivery Experience: Demonstrated experience of successfully taking software projects from conception to production. Be prepared to discuss specific examples during the interview process. Problem More ❯

Company | Tech For Good, Social Welfare, Product 📏 Size | 200 people 🧢 Role | Product Engineer 🪜 Level | Senior 🎯 Areas | full stack product development, web, AI ✨ Tech | TypeScript, React, Node.js, Ruby, AWS 📍 Based | London (Zone 1) 💻 Hybrid | 2 days a week in-office 💰 Offer | £95-115k + share options Hi 👋 Workonomics are partnering with a tech-for-good company who are … adoption and growth. The company have recently raised new investment to grow in to new sector verticals and international locations, and fuel further product development. They're now seeking Senior Product Engineers who: have worked on complex web systems across the full stack show pragmatism when choosing the right languages and tools for the job are product - minded - you … enjoy working in cross - functional teams (Engineering, Product, Design, Data) ✅ This will suit an engineering generalist who cares most about the problem being solved ❌ This will not suit an engineer who is wedded to specialising in one particular tech stack You’ll be joining a company that’s having a hugely positive impact on people’s lives , with a More ❯

T24 Principal Software Engineer Location: London - Hybrid 3 days a week in the office Duration: Initially 6 months Rate: £market rate The company: Global Technology company delivering digital transformation to a financial services end client. The knowledge, experience and qualifications you need Wide, detailed, and up-to-date experience of the technologies and tools in your area. Plenty … of experience in the full lifecycle of developing software from the first idea to the final execution Mandatory to have L3 code development skills with hands-on experience. TAFJ knowledge and code library management experience. Local code development skill using Info Basic and TAFJ componentized codes. In-depth Technical knowledge of T24 Customization and OFS processing. Linux basics. Agile … delivery experience, especially around discovering requirements and preparing user stories. A good understanding of testing approaches and putting testability at the heart of software design and development. The ability to establish relationships with stakeholders at all levels A good understanding of system integration patterns and associated technologies. Excellent written and spoken English, and communication skills to help manage relationships More ❯

As we continue our rapid growth, we need brilliant people (like you!) to join us and help us achieve our mission. ABOUT THE ROLE: We’re looking for a Senior Full-Stack Software Engineer to join our growing development team at Townhouse. In this high-impact role, you'll take technical ownership of critical projects, leading the … and business performance. You’ll also manage team members, contribute to architectural decisions, and shape best practices as we scale our platform. If you're a strong full-stack engineer with a passion for building exceptional software and a desire to lead within a fast-moving start up environment, we’d love to hear from you. KEY RESPONSIBILITIES … Drive performance optimizations, address technical debt, and mitigate system risks. Manage junior and mid-level engineers, providing feedback through code reviews, pairing, and knowledge-sharing sessions. ABOUT YOU: Strong software engineering experience, including experience managing a squad. Strong full-stack background, with deep expertise in TypeScript and frameworks like Vue or similar (React, Angular, etc.). Proficient in designing More ❯

typed language (e.g., Java, C++, Go). While the firm utilizes Go extensively, prior Go experience isn't required – just a readiness to integrate with an existing Go-based software stack. Data Analysis & Statistical Acumen: You're comfortable with data analysis and statistical methods , crucial for ensuring pristine data quality. Experience with regression analysis (for example, to determine market … be a significant asset. Financial Knowledge (A Plus): While not mandatory, any prior knowledge of finance would be beneficial. This is an exceptional opportunity for an autonomous and skilled engineer to make a significant impact on a core platform within a leading financial firm. Contact Ciara Clarke at Harrington Starr for a confidential discussion on this role. More ❯

with the Machine Learning team to understand the underlying concepts and user flows; however, you are not required or expected to have background in Machine Learning. This is a senior-level role, and we are looking to hire a software engineer with background in product design, UI/UX design, and with a strong sense of aesthetics. … experience: Experience with a startup work environment and wider ecosystem. Why join us? Work in an environment conducting cutting-edge research in AI. An official role title of “Founding Engineer” – make an impact on day one. Competitive salary, equity and benefits package. 28 days + public holidays allowance. Opportunities for professional growth and progression with your career. Work on More ❯

access to roadmaps * 33 days holiday, Hybrid London (Bank), Visa sponsorship available * Fortnightly team dinners at customer restaurants Minimum requirements: * 4+ years commercial experience shipping and maintaining production-level software * Typescript & React : deep understanding of both front-end and back-end usage * AWS : experience running live production workloads (we use ECS, RDS, Lambda, SQS, VPC) * GraphQL : built and consumed … or DM me (JJ) on WhatsApp +447855553652 with one tradeoff you’ve made while shipping fast, and what you’d do differently in hindsight. https://getjelly.notion.site/senior-full-stack-jelly More ❯

projects. This includes designing and building new functionality, enhancing existing systems, and modernising legacy applications. You’ll work closely with various teams across the business to develop high-performance software solutions that drive growth. 💡 Key Responsibilities: Develop and maintain SPA (Single Page Applications) using Angular, HTML, CSS, and TypeScript. Build and enhance web services and RESTful APIs using C# More ❯

Senior Software Engineer (React/Python) Salary: Up to £120k Location: On-site (London) Senior Software Engineer (React/Python) - would you like the opportunity to work for a company that specialises in digital products and experiences, combining research, analysis and insights with technology and creativity to solve business challenges? They are looking 3x … motivated, hands-on Software Engineers who will work closely with the creative team. As a Senior Software Engineer, you will get a lot of responsibility and work in an award-winning team who are looking to double this year. Key requirements: 4+ years’ experience working with React, TypeScript. Experience working with Python. Experience working with React … Native would be a bonus. If you’re a Senior Software Engineer (React, Python) looking for a new challenge, please apply. More ❯

Senior CFD Software Engineer London I'm currently supporting a Fortune 100 organisation and a global leader. In this role, you will design and enhance solver features for both CPU and GPU, as well as develop pre- and post-processing tools. You will work closely with engineers and product teams to deliver robust solutions, actively participate in … Agile planning and code reviews, and ensure code quality through thorough testing and debugging. What's required for this Senior CFD Software Engineer position? Degree in Physics, Mechanical/Aerospace Engineering, or related field. 2–5 years’ C++ (17/20) development experience. Strong maths and problem-solving skills. Experience with CFD, meshing, or flow networks. Familiarity … with OpenMP, MPI, CUDA. If you're a Senior CFD Software Engineer and you're looking for a new opportunity, please apply to learn more. If you're interested in this, or other Software opportunities across the UK, please contact Jack Bird at IC Resources. jack.bird@ic-resources.com More ❯

Senior Software Engineer – AI Startup – Up to 120k 🚀🧠 💰 Salary: £70,000 - £120,000 + meaningful equity 🏙️ Location : London, flexible working arrangements, ideally 1/2 days in office 💻 Tech Stack : Python, Flask, FastAPI, React, TypeScript, GCP (Backend Leaning) Our y-combinator backend client are building an elite engineering team within the AI space. The platform is being … and want to solve real-world problems with the latest in AI and LLMs, this role is for you. In this role, you’ll: 🔧 Build and ship high-impact software 🧠 Work on AI/LLM-powered automation tools used in production 🏗️ Help shape scalable systems and infrastructure 🌍 Work collectively across teams to push the product forward 💻 Be working end … adaptable and comfortable working across their stack ✅ Understand the working dynamics of a fast paced start-up If this role sounds like it could be of interest, apply now! Senior Software Engineer – AI Startup – Up to 120k More ❯

Kotlin Engineer - Contract Looking for Java/Kotlin Engineers to work on a large scale, finance project for 12 months. Candidates must have 1-2+ years commercial Kotlin experience (Backend) Stack - Java/Kotlin, TDD/XP, AWS, Kafka. £600 - £650 per day Outside IR35 2 days a week in London Please get in touch to find out More ❯

Senior Software Engineer (Python, JavaScript/TypeScript), London Hybrid, £100,000 + Equity + Benefits, Life Changing Industry The Opportunity: An opportunity to join a well-established business in the centre of London operating across the healthcare industry, as Senior Software Engineer. This position will allow you to not only be a Engineer but … organisations long term goal. Your skills will be needed to build a range of products for consumers such as web applications and products that track health related issues. The software that you build will have a direct impact on the consumer, and a positive influence on people’s lives. The Role: An opportunity to work for top health care … organisations, Senior Engineer (Python, TypeScript, PostgreSQL). You will be working on a number of projects, helping to create innovative and life improving applications, products and solutions that will aid a global impact. One specific applications that you will be working on, is a progressive web applications that improve the health of millions of people. Experience with the More ❯

Senior Software Engineer 🌍- Python, Django, REST, AWS&GCP - £80,000 - £95,000 Are you passionate about sustainability and innovation? Join a cutting-edge London-based startup that’s revolutionizing how businesses achieve net zero. With £10 million in funding and a growing team of 10 talented engineers , this company is leading the charge in simplifying sustainability through … technology. About the Role As a Software Engineer , you’ll be at the forefront of developing scalable solutions using Python , Django , and REST and more, helping businesses take meaningful steps toward reducing their carbon footprint. What You'll Do Design, build, and maintain robust web applications and services. Collaborate with a tight-knit, high-performing team to deliver More ❯