801 to 825 of 1,221 Software Engineer Jobs in London

time | Salary + Equity | Purpose-led startup Joyned is on a mission to help organisations build strong, safe communities through better communication. We’re looking for a hands-on software engineer to take ownership of our codebase and help shape how the product evolves. We’re a funded startup, built in partnership with Brightec (the team behind apps … transform how they connect with their communities. This is a solo engineering role, as we kick-off our in-house engineering team. You'll be our only full-time engineer, writing, testing and shipping code across the whole stack. You won’t be micromanaged - you’ll lead and pioneer. Our founder will be involved in technical decisions and we More ❯

time | Salary + Equity | Purpose-led startup Joyned is on a mission to help organisations build strong, safe communities through better communication. We’re looking for a hands-on software engineer to take ownership of our codebase and help shape how the product evolves. We’re a funded startup, built in partnership with Brightec (the team behind apps … transform how they connect with their communities. This is a solo engineering role, as we kick-off our in-house engineering team. You'll be our only full-time engineer, writing, testing and shipping code across the whole stack. You won’t be micromanaged - you’ll lead and pioneer. Our founder will be involved in technical decisions and we More ❯

time | Salary + Equity | Purpose-led startup Joyned is on a mission to help organisations build strong, safe communities through better communication. We’re looking for a hands-on software engineer to take ownership of our codebase and help shape how the product evolves. We’re a funded startup, built in partnership with Brightec (the team behind apps … transform how they connect with their communities. This is a solo engineering role, as we kick-off our in-house engineering team. You'll be our only full-time engineer, writing, testing and shipping code across the whole stack. You won’t be micromanaged - you’ll lead and pioneer. Our founder will be involved in technical decisions and we More ❯

time | Salary + Equity | Purpose-led startup Joyned is on a mission to help organisations build strong, safe communities through better communication. We’re looking for a hands-on software engineer to take ownership of our codebase and help shape how the product evolves. We’re a funded startup, built in partnership with Brightec (the team behind apps … transform how they connect with their communities. This is a solo engineering role, as we kick-off our in-house engineering team. You'll be our only full-time engineer, writing, testing and shipping code across the whole stack. You won’t be micromanaged - you’ll lead and pioneer. Our founder will be involved in technical decisions and we More ❯

We are looking for a Software Engineer to the Ultra-Low Latency (ULL) Market Making team within this rapidly expanding Prop Trading firm based in London. This is a hands-on engineering role at the frontier of high-performance trading systems What You’ll Do Design and implement modern C++ (C++20/23) applications for ultra-low latency … trading. Optimize performance at the CPU, kernel, and network stack level to minimize latency and maximize throughput. Engineer and maintain Linux-based systems tuned for high-frequency trading workloads. Develop and refine TCP/IP networking solutions for market connectivity. Collaborate with traders, researchers, and engineers to deliver robust, production-ready systems. Explore opportunities to integrate AI/ML … Market leading compensation, benefits, and a culture that rewards innovation and technical mastery. If you’re passionate about building ultra-fast systems and excited by the challenge of combining software, hardware, and AI to redefine what’s possible in electronic trading, we’d love to hear from you. More ❯

We are looking for a Software Engineer to the Ultra-Low Latency (ULL) Market Making team within this rapidly expanding Prop Trading firm based in London. This is a hands-on engineering role at the frontier of high-performance trading systems What You’ll Do Design and implement modern C++ (C++20/23) applications for ultra-low latency … trading. Optimize performance at the CPU, kernel, and network stack level to minimize latency and maximize throughput. Engineer and maintain Linux-based systems tuned for high-frequency trading workloads. Develop and refine TCP/IP networking solutions for market connectivity. Collaborate with traders, researchers, and engineers to deliver robust, production-ready systems. Explore opportunities to integrate AI/ML … Market leading compensation, benefits, and a culture that rewards innovation and technical mastery. If you’re passionate about building ultra-fast systems and excited by the challenge of combining software, hardware, and AI to redefine what’s possible in electronic trading, we’d love to hear from you. More ❯

We are looking for a Software Engineer to the Ultra-Low Latency (ULL) Market Making team within this rapidly expanding Prop Trading firm based in London. This is a hands-on engineering role at the frontier of high-performance trading systems What You’ll Do Design and implement modern C++ (C++20/23) applications for ultra-low latency … trading. Optimize performance at the CPU, kernel, and network stack level to minimize latency and maximize throughput. Engineer and maintain Linux-based systems tuned for high-frequency trading workloads. Develop and refine TCP/IP networking solutions for market connectivity. Collaborate with traders, researchers, and engineers to deliver robust, production-ready systems. Explore opportunities to integrate AI/ML … Market leading compensation, benefits, and a culture that rewards innovation and technical mastery. If you’re passionate about building ultra-fast systems and excited by the challenge of combining software, hardware, and AI to redefine what’s possible in electronic trading, we’d love to hear from you. More ❯

We are looking for a Software Engineer to the Ultra-Low Latency (ULL) Market Making team within this rapidly expanding Prop Trading firm based in London. This is a hands-on engineering role at the frontier of high-performance trading systems What You’ll Do Design and implement modern C++ (C++20/23) applications for ultra-low latency … trading. Optimize performance at the CPU, kernel, and network stack level to minimize latency and maximize throughput. Engineer and maintain Linux-based systems tuned for high-frequency trading workloads. Develop and refine TCP/IP networking solutions for market connectivity. Collaborate with traders, researchers, and engineers to deliver robust, production-ready systems. Explore opportunities to integrate AI/ML … Market leading compensation, benefits, and a culture that rewards innovation and technical mastery. If you’re passionate about building ultra-fast systems and excited by the challenge of combining software, hardware, and AI to redefine what’s possible in electronic trading, we’d love to hear from you. More ❯

Role: Python Software Engineer - Up to £100k + Stock Options Offered! Salary: Up to £100k + Stock Options Offered! Location: United Kingdom Skills: Python, Fast API This firm is an elite AI tech company with high tech standards who have previously set tech world records. They are made up of some exceptionally talented individuals who above all are …/interests but you can expect to working with the latest technologies (Python, Fast API etc) to pioneer cutting edge AI solutions! What else is in it for you? • Software Engineers are treated as the company's #1 asset • Low attrition rate; people working there love what they do on a daily basis! • Very friendly, tight-knit environment • Flat More ❯

Role: Python Software Engineer - Up to £100k + Stock Options Offered! Salary: Up to £100k + Stock Options Offered! Location: United Kingdom Skills: Python, Fast API This firm is an elite AI tech company with high tech standards who have previously set tech world records. They are made up of some exceptionally talented individuals who above all are …/interests but you can expect to working with the latest technologies (Python, Fast API etc) to pioneer cutting edge AI solutions! What else is in it for you? • Software Engineers are treated as the company's #1 asset • Low attrition rate; people working there love what they do on a daily basis! • Very friendly, tight-knit environment • Flat More ❯

Role: Python Software Engineer - Up to £100k + Stock Options Offered! Salary: Up to £100k + Stock Options Offered! Location: United Kingdom Skills: Python, Fast API This firm is an elite AI tech company with high tech standards who have previously set tech world records. They are made up of some exceptionally talented individuals who above all are …/interests but you can expect to working with the latest technologies (Python, Fast API etc) to pioneer cutting edge AI solutions! What else is in it for you? • Software Engineers are treated as the company's #1 asset • Low attrition rate; people working there love what they do on a daily basis! • Very friendly, tight-knit environment • Flat More ❯

We’re partnering exclusively with one of the most prestigious trading firms in London to find a highly skilled Front-End Software Engineer to join their world-class engineering team. This is an opportunity to work at the very heart of high-performance trading technology — building ultra-responsive, visually intuitive web interfaces for some of the most demanding … trading, gaming, or top-tier tech) Passion for clean, maintainable code and UI craftsmanship Why Join? Collaborate with some of the sharpest minds in trading and technology Contribute to software that drives real-time trading decisions Work in a flat-structured, engineering-led environment with rapid decision-making Top-tier compensation, full autonomy, and state-of-the-art tools More ❯

We’re partnering exclusively with one of the most prestigious trading firms in London to find a highly skilled Front-End Software Engineer to join their world-class engineering team. This is an opportunity to work at the very heart of high-performance trading technology — building ultra-responsive, visually intuitive web interfaces for some of the most demanding … trading, gaming, or top-tier tech) Passion for clean, maintainable code and UI craftsmanship Why Join? Collaborate with some of the sharpest minds in trading and technology Contribute to software that drives real-time trading decisions Work in a flat-structured, engineering-led environment with rapid decision-making Top-tier compensation, full autonomy, and state-of-the-art tools More ❯

We’re partnering exclusively with one of the most prestigious trading firms in London to find a highly skilled Front-End Software Engineer to join their world-class engineering team. This is an opportunity to work at the very heart of high-performance trading technology — building ultra-responsive, visually intuitive web interfaces for some of the most demanding … trading, gaming, or top-tier tech) Passion for clean, maintainable code and UI craftsmanship Why Join? Collaborate with some of the sharpest minds in trading and technology Contribute to software that drives real-time trading decisions Work in a flat-structured, engineering-led environment with rapid decision-making Top-tier compensation, full autonomy, and state-of-the-art tools More ❯

Project description We're looking for a skilled and driven Avaloq Software Engineer to join our Wealth Practice in the UK. In this role, you'll play a key part in designing, developing, and maintaining high-quality software and data structures to support our evolving data platforms. You'll collaborate across teams to support data migration, cleansing … enrichment, scripting, and reconciliation—ensuring we deliver reliable and scalable solutions. Responsibilities Your expertise in Avaloq technologies, database management, and software development—combined with a solid understanding of the Avaloq Enterprise-Wide Object Model—will be critical in shaping and enhancing our data capabilities. This is a fantastic opportunity to bring your passion for innovation into a fast-paced More ❯

Project description We're looking for a skilled and driven Avaloq Software Engineer to join our Wealth Practice in the UK. In this role, you'll play a key part in designing, developing, and maintaining high-quality software and data structures to support our evolving data platforms. You'll collaborate across teams to support data migration, cleansing … enrichment, scripting, and reconciliation—ensuring we deliver reliable and scalable solutions. Responsibilities Your expertise in Avaloq technologies, database management, and software development—combined with a solid understanding of the Avaloq Enterprise-Wide Object Model—will be critical in shaping and enhancing our data capabilities. This is a fantastic opportunity to bring your passion for innovation into a fast-paced More ❯

Project description We're looking for a skilled and driven Avaloq Software Engineer to join our Wealth Practice in the UK. In this role, you'll play a key part in designing, developing, and maintaining high-quality software and data structures to support our evolving data platforms. You'll collaborate across teams to support data migration, cleansing … enrichment, scripting, and reconciliation—ensuring we deliver reliable and scalable solutions. Responsibilities Your expertise in Avaloq technologies, database management, and software development—combined with a solid understanding of the Avaloq Enterprise-Wide Object Model—will be critical in shaping and enhancing our data capabilities. This is a fantastic opportunity to bring your passion for innovation into a fast-paced More ❯

Project description We're looking for a skilled and driven Avaloq Software Engineer to join our Wealth Practice in the UK. In this role, you'll play a key part in designing, developing, and maintaining high-quality software and data structures to support our evolving data platforms. You'll collaborate across teams to support data migration, cleansing … enrichment, scripting, and reconciliation—ensuring we deliver reliable and scalable solutions. Responsibilities Your expertise in Avaloq technologies, database management, and software development—combined with a solid understanding of the Avaloq Enterprise-Wide Object Model—will be critical in shaping and enhancing our data capabilities. This is a fantastic opportunity to bring your passion for innovation into a fast-paced More ❯

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. Portfolio We would love to see your recent frontend works! If … 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 ❯

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. Portfolio We would love to see your recent frontend works! If … 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 ❯

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. Portfolio We would love to see your recent frontend works! If … 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 ❯

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. Portfolio We would love to see your recent frontend works! If … 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 ❯

Software Developer Key Technologies: C#, .NET, .NET Core, Azure, SQL London Perm Role | Hybrid Working Structure £50,000 - £60,000 Harrington Starr has partnered with a global Investment Bank who are looking to hire a seasoned Senior C# Developer with extensive experience developing from Back to Front Office trading systems. Key Responsibilities: Design, develop and maintain Front Office systems More ❯

Software Developer Key Technologies: C#, .NET, .NET Core, Azure, SQL London Perm Role | Hybrid Working Structure £50,000 - £60,000 Harrington Starr has partnered with a global Investment Bank who are looking to hire a seasoned Senior C# Developer with extensive experience developing from Back to Front Office trading systems. Key Responsibilities: Design, develop and maintain Front Office systems More ❯

candidates may make applications for this position, so make sure to send your CV and application through as soon as possible. These companies face unique, complex challenges that typical software was never designed to solve. Cogna was founded to change this. Our mission is to give critical industries their own AI-powered Software Factory: a way to build … your experience doesn t match every requirement. We are committed to building a diverse team that reflects the industries and societies we serve. Overview We are looking for a Software Engineer (Team Lead) to lead a team of 3-6 talented engineers while spending more than half your time doing deeply technical work. You will be responsible for More ❯