1 to 25 of 79 Software Engineer Jobs in the City of London

Senior Software Engineer C++ (Python, SQL, Linux, Trading, FinTech, Financial Technology, Low Latency, Backend) ***This is a hybrid role, 3 days remote and 2 days in the office*** Our client actively encourages diversity, equality and inclusion within its workforce and welcomes applications from a diverse background, REC Solutions … Limited does not discriminate in regards to age, gender, national origin, religion or any other basis. An excellent opportunity has arisen for a Senior Software Engineer C++to join a friendly team my client are a well-established exchange (FinTech, Financial Technology) based in the City. My client ...

C# Software Engineer/Developer (Azure API) London/WFH to £90k Are you a backend focused C# Software Engineer with a strong knowledge of Azure? You could be progressing your career in a senior, hands-on C# Software Engineer role at a hugely … successful, global health/wellness company. As a C# Software Engineer you'll join a team acting as a tech incubator within the wider business who are enabling the business to transform from fitness through to a lifestyle and wellbeing experience, via the customer facing member engagement platform. ...

Software Engineer/Developer (C# .Net) London onsite to £90k Are you an experienced C#, backend focussed Software Engineer? You could be progressing your career in a hands-on, backend focussed Software Engineer role at a global sports trading firm, earning substantial bonuses. What … based on personal performance (10-25%) Professional development Pension Health Insurance Gym membership Social events, free fruit, snacks, coffee etc. Your role: As a Software Engineer within the trading engine team you'll collaborate to design and develop real-time trading systems, you'll often be collaborating with ...

Senior Software Engineer | Distributed Systems | Sustainable Cloud Native Platform 💸Up to £110,000 per annum plus bonus plus stock 🏠Central London office 🖱️Golang, Rust, C, Kubernetes, Linux, Cloud Native, Distributed systems... Are you a Senior Software Engineer with extensive knowledge of building distributed systems? Looking … so... I'm partnered with a very exciting Cloud scale-up who have received record Series A funding and are looking for innovative Senior Software Engineers to join their ambitious team! With a new VP of Engineering who has spent much of their career building out a world leading ...

C# Software Engineer/Developer (Azure API) London/WFH to £90k Are you a backend focused C# Software Engineer with a strong knowledge of Azure? You could be progressing your career in a senior, hands-on C# Software Engineer role at a hugely … successful, global health/wellness company. As a C# Software Engineer you'll join a team acting as a tech incubator within the wider business who are enablin click apply for full job details ...

Full Stack Software Engineer - Start Up/Industrial Automation We are partnered with a London-based manufacturer reinventing industrial production through their proprietary software. The team is hiring a Fullstack Software Engineer to architect and scale systems that control factory automation and real-time data processing … aerospace and energy sectors. This is a permanent onsite position in London, UK. Key responsibilities for this Full Stack Software Engineer position: Architect and develop critical systems for factory automation and real-time monitoring. Take ownership of the full stack, including infrastructure, backend services, and UX. Identify operational ...

Software Engineer/Developer (Java SpringBoot AWS) London/WFH to £90k Are you a Java technologist seeking a role where you can work on ground breaking technology, continually learning and progressing your career? You could be joining a global technology consultancy. As a Software Engineer … microservices environments You have a good knowledge of REST APIs You have a good understanding of AWS You have a thorough understanding of software development and Computer Science fundamentals such as Object Oriented Programming, Data Structures and Design Patterns You are familiar with DevOps, CI/CD pipelines ...

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 … 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. ...

Robotics Software Engineer – Flight Software Location: Oxfordshire or London (remote first, monthly office visit) Salary: up to £55,000 + benefits I’m supporting a fast-growing UK start-up that is building cutting-edge assurance systems to make AI-enabled robotics and autonomous systems operate safely … reliably in safety‐critical environments. They are looking for a Robotics Software Engineer to join the team developing core robotics software components that underpin perception, planning, control and decision‐making in complex autonomous platforms. You will: Design, develop and implement robotics software components within a core ...

Software Engineer/Developer (C# .Net) London onsite to £90k Are you an experienced C#, backend focussed Software Engineer? You could be progressing your career in a hands-on, backend focussed Software Engineer role at a global sports trading firm, earning substantial bonuses. What ...

Staff Software Engineer - Cybersecurity Start-up | London Staff Software Engineer required for one of the most exciting cybersecurity start-ups in London right now: still early enough to make a real mark, but past the uncertainty and firmly in build and scale mode. This … doesn’t just write great code, but shapes systems, influences direction, and raises the bar across the team. About you: 5+ years of professional software engineering experience Proficient in Python, Go, Java or C# but fundamentally language agnostic Strong system design and architecture skills Comfortable owning problems from idea ...

Software Engineer – UK Engineering Team A fast-growing technology company building the digital infrastructure for physical AI With offices across the US, Europe, and Asia, the UK team is based in London . About the Role As a Software Engineer on the UK Engineering team … successful candidate will help lead the design, development, and optimisation of high-performance software solutions — ensuring scalability, reliability, and maintainability. They will work closely with the US engineering team and cross-functional colleagues to translate requirements into robust technical solutions. Key Responsibilities: Leading design, development, and optimisation of high ...

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 … 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. ...

Software Engineer - C++ Title : Software Engineer - C++ Company : Elite Software House Location : Remote (London office) Salary : £80,000 - £115,000 Skills : C++, Algorithms, Boost Overview : Are you someone that thinks that writing slick, classy C++ code can and should be an art? Would you like … part of an internationally recognised team of C++ experts led by the brightest C++ minds in the world? An elite software house are looking for the top 1% of engineers of all levels to come on board as they continue to develop beautiful algorithms which power business decisions ...

Software Engineer London – Hybrid We’re working with a growing, international technology business at a pivotal stage of its scale-up journey. With a high-performing team of around 40 people and ambitious growth plans, the company is now seeking a Senior Software Engineer to help … systems and support the next phase of scale. Reporting into the VP of Engineering, this role is focused on building reliable, scalable software and supporting the systems that underpin the company’s platform. While not a people management position, it carries significant influence across engineering and plays a central ...

Senior Software Engineer The Opportunity On behalf of a global powerhouse in FinTech Infrastructure , we are seeking a Senior Software Engineer . Our client operates one of the largest financial networks, serving as the digital backbone for thousands of global financial institutions. This is a senior … tier appointment for an engineer who excels at building resilient, high-concurrency systems and wants to lead the digitalization of global financial markets. The Technical Stack You will be working within a modern, engineering-first culture. The core stack includes: The Engine: Expert-level C# and .NET Core mastery. ...

Title: Senior Embedded Software Engineer Rank: Determined by the confirmed level and scope of experience Company: Chevalier Tech Limited Location: Colindale, Greater London (On-site) Job Type: Full-time, Permanent About Us Chevalier Tech Limited is a tier-one supplier specialising in advanced technology systems, primarily … Smart Door Handles, and Control Electronics, which are integrated into high-end passenger and super cars worldwide. About the Role As a highly Experienced Software Engineer , you will lead the software engineering team, play a pivotal role in the design, development, and implementation of embedded software ...

Backend Software Engineer London (Occasional travel) Salary: Up to £85k + Benefits An established, global technology business within the hospitality-tech industry is seeking an accomplished Principal Software Engineer to lead the design and delivery of next-generation digital solutions. This is an opportunity to shape … with engineering leadership to define best practices, coding standards, and long-term technical strategy. Design, develop, and oversee the delivery of robust, production-grade software built using Python, Django, Cloud Firestore, BigQuery, and Elasticsearch. Mentor and guide engineers at all levels, fostering a culture of technical excellence and continuous ...

Software Engineer - Backend London (Occasional travel) Salary: Up to £85k + Benefits An established, global technology business within the hospitality-tech industry is seeking an accomplished Principal Software Engineer to lead the design and delivery of next-generation digital solutions. This is an opportunity to shape … with engineering leadership to define best practices, coding standards, and long-term technical strategy. Design, develop, and oversee the delivery of robust, production-grade software built using Python, Django, Cloud Firestore, BigQuery, and Elasticsearch. Mentor and guide engineers at all levels, fostering a culture of technical excellence and continuous ...

Backend Software Engineer | High-Growth HealthTech Scale-Up | London (Hybrid) We are working with a fast-growing digital healthcare platform. This is a rare opportunity to join a company where engineering genuinely shapes product, and where the work has measurable real-world impact at scale. The Role … Backend Software Engineer joining a collaborative, Agile engineering team, working across a portfolio of market-leading consumer health products. Every engineer here has meaningful ownership from day one. Day-to-day you'll be designing, building and testing new features, partnering closely with product and design, mentoring ...

Senior Software Engineer | £900 per day (Inside IR35) | London | 3 days in Office Industry: Commodities Trading Location: London Job Type: Contract (6 months initial) Our client, a leading commodities trading firm, is seeking a Senior Software Engineer to support Front Office Technology across Gas and Power. … This is a senior, delivery-focused role suited to an engineer who can take ownership of initiatives and drive them end-to-end within a fast-paced trading environment. You will work closely with Front Office stakeholders and technology teams, delivering robust platforms and tooling that directly support trading ...

Senior Software Engineer | Python | AI Systems | London | £120k to £160k + Equity Location: London hybrid Salary: £120k to £160k + meaningful equity Building AI systems is easy. Building AI systems that behave predictably in production is not. We are working with a well funded Series A startup tackling … environment where correctness, thoughtful design and long term system quality genuinely matter. If you enjoy solving difficult systems problems and building software that actually holds up in the real world, this is a rare opportunity. Tech stack Python (FastAPI, Django or Flask) - experience across Rust, Golang, C++ useful ...

Python Software Engineer – High-Frequency Trading We're working with a high-frequency trading (HFT) firm that is looking to expand its technology team with a Python Software Engineer. This is an opportunity to join a trading firm operating at the cutting edge of global markets, where … exchanges. You’ll work on some of the most complex and rewarding engineering challenges in the financial technology space. The Role As a Python Software Engineer, you’ll collaborate with traders, quantitative researchers, and other developers to design, develop, and optimise trading infrastructure. You’ll be directly contributing ...

Backend Software Engineer London (Occasional travel) Salary: Up to £85k + Benefits An established, global technology business within the hospitality-tech industry is seeking an accomplished Principal Software Engineer to lead the design and delivery of next-generation digital solutions click apply for full job details ...

Software Engineer | Building Intelligent Systems That Make an Impact Central London 4 or 5 days a week on site Existing SC or DV Clearance is required National Security Sector Tech: JAVA/C++/Python - or Devops/Data Background An exciting opportunity has arisen for a Software Engineer to join a cutting-edge team developing impactful, mission-driven technology. The role offers the chance to contribute to projects such as AI-powered tools for analysts and operators, secure data pipelines, and innovative prototypes that explore new frontiers in software capability. You’ll become part ...