76 to 100 of 183 Software Engineer Jobs in the City of London

Senior Software Engineer – Backend (Java) 📅 6-Month Contract | 🏢 Hybrid (2 Days in Office) | 💷 £600 p/d inside ir35 We’re looking for a skilled Backend Java Engineer to join an innovative team on a 6-month contract. If you love solving complex problems, mentoring others, and working on cutting-edge data platforms at scale- this one More ❯

Senior Software Engineer - Artificial Intelligence - London - £100,000 - £150,000 base + Equity We are working with an ambitious, well-funded defence technology company revolutionising how organisations collaborate with sensors, robots, and autonomous systems. This is a pivotal moment to join a high-calibre team solving some of the most complex and consequential problems in the field. From … and influence over design, functionality, and direction, no layers of bureaucracy, just the opportunity to make a tangible impact. About the Role You will design, build, and test core software platforms and user interfaces. This includes deploying and testing with autonomous and robotic systems in the field, writing maintainable code for mission-critical environments, integrating with third-party APIs … alongside real systems. Required Skills Degree in Computer Science, Engineering, or a related technical field (or equivalent experience) Strong programming skills in C++, Rust, Java 8+ years of professional software engineering experience Preferred Skills Experience with autonomous systems and robotics Benefits Mission & impact: Build software directly supporting defence and humanitarian operations Ownership: Shape architecture, product direction, and team More ❯

Senior Software Engineer - Artificial Intelligence - London - £100,000 - £150,000 base + Equity We are working with an ambitious, well-funded defence technology company revolutionising how organisations collaborate with sensors, robots, and autonomous systems. This is a pivotal moment to join a high-calibre team solving some of the most complex and consequential problems in the field. From … and influence over design, functionality, and direction, no layers of bureaucracy, just the opportunity to make a tangible impact. About the Role You will design, build, and test core software platforms and user interfaces. This includes deploying and testing with autonomous and robotic systems in the field, writing maintainable code for mission-critical environments, integrating with third-party APIs … alongside real systems. Required Skills Degree in Computer Science, Engineering, or a related technical field (or equivalent experience) Strong programming skills in C++, Rust, Java 8+ years of professional software engineering experience Preferred Skills Experience with autonomous systems and robotics Benefits Mission & impact: Build software directly supporting defence and humanitarian operations Ownership: Shape architecture, product direction, and team More ❯

Senior C++ Software Engineer Salary: £75,000 - £135,000 Key Responsibilities Design, develop, and optimize software in C++ and/or Rust for control and orchestration systems. Build low-latency interfaces between hardware and classical compute systems. Collaborate with hardware teams to integrate software with FPGAs and high-speed digital electronics. Develop and maintain firmware and … platforms. Analyze and optimize system performance including latency, throughput, and resource utilization. Participate in system architecture design and technical decision-making. Conduct code reviews , mentor junior engineers, and promote software best practices. Work with cross-functional teams to ensure seamless integration of hardware and software components for robust, production-ready systems. Ensure system reliability , fault tolerance , and performance … in data centre environments. Required Qualifications Bachelor's or Master's degree in Computer Engineering , Electrical Engineering , Physics , or a related field. 5+ years of professional experience in software development, with a focus on C++ and/or Rust . Strong understanding of FPGA architectures , toolchains (e.g., Xilinx Vivado, Intel Quartus), and hardware description languages ( VHDL/Verilog ). More ❯

Golang Engineer – up to £70k base + bonus Location: London Working Arrangements: 1-3 days a week in the London office Salary: up to £70,000 base Industry: Energy Tech Stack: Go, Kafka, React, AWS Sponsorship: Not offered Fantastic opportunity for a highly skilled mid-senior level Software Engineer to join a energy software company working More ❯

Manatal is an HRTech software service (B2B SaaS) company headquartered in Bangkok, Thailand. Manatal is one of the fastest-growing start-ups in the region and is backed by Surge and Sequoia Capital. Manatal has a global presence and is trusted by thousands of businesses in over 135 countries. Our goal is to transform the entire hiring process by … best-in-class AI-powered technologies to empower small, medium, and large businesses in their staffing & recruitment transformation. Role Overview We seek a passionate and experienced Lead Full Stack Engineer to join our dynamic team. The ideal candidate is a seasoned software engineer who excels in designing and building complex software applications across the entire stack … technical initiatives rather than people management. We are looking for someone eager to learn, be proactive, energetic, and understand the importance of making an impact. The Lead Full Stack Engineer will be responsible for both frontend and backend development, ensuring seamless integration and high performance of web applications. Responsibilities Lead technical initiatives and projects, ensuring high-quality delivery. Design More ❯

Manatal is an HRTech software service (B2B SaaS) company headquartered in Bangkok, Thailand. Manatal is one of the fastest-growing start-ups in the region and is backed by Surge and Sequoia Capital. Manatal has a global presence and is trusted by thousands of businesses in over 135 countries. Our goal is to transform the entire hiring process by … best-in-class AI-powered technologies to empower small, medium, and large businesses in their staffing & recruitment transformation. Role Overview We seek a passionate and experienced Lead Full Stack Engineer to join our dynamic team. The ideal candidate is a seasoned software engineer who excels in designing and building complex software applications across the entire stack … technical initiatives rather than people management. We are looking for someone eager to learn, be proactive, energetic, and understand the importance of making an impact. The Lead Full Stack Engineer will be responsible for both frontend and backend development, ensuring seamless integration and high performance of web applications. Responsibilities Lead technical initiatives and projects, ensuring high-quality delivery. Design More ❯

Senior Software Engineer - Backend & Data | Fully Remote (UK) Founding Engineer | Python | GCP | Terraform | Event-Based Systems | Data Pipelines An innovative, mission-driven LegalTech SaaS start-up is looking for a Senior Product Engineer (Backend & Data) with deep experience in Python, Product development, and Data engineering. Role Information: Salary : Up to £100,000 (DOE) + Equity Location … mindset to every decision. This role is ideal for someone who thrives on turning early-stage ideas into scalable, market-ready Products backed by solid Data pipelines. Senior Product Engineer - Highlights: Enhance and scale backend services in Python Architect event-driven solutions in GCP with Pub/Sub & Cloud Run Build and optimise Python code for high-performance backend More ❯

Role Outline Engineered Arts is seeking a Senior Robot Systems Software Engineer to work on the code that runs directly on our humanoid robots, the glue between sensors, actuators, and cloud services. You’ll build and maintain the real-time and near-real-time systems that make our robots come alive: coordinating motion, perception, speech, and networked behaviour. … This role suits someone who enjoys hands-on debugging, understands hardware–software interaction, and thrives in a multidisciplinary environment spanning mechanical, electrical, and software engineering. Main Responsibilities On-Robot Software Development Design, implement and maintain modules running on Linux-based robot computers (Python, C++, Rust). Interface with sensors, actuators, and controllers over serial, USB, and network … in deployed robots. Qualifications, Knowledge, Key Skills and Experience Essential Bachelor’s or Master’s in Computer Science, Robotics, Electrical/Mechatronics Engineering, or related field Significant experience developing software for hardware-integrated systems (e.g. robotics, IoT, or embedded Linux) Strong programming skills (Preferably Python, Rust and C++) Excellent debugging and profiling ability across system layers Familiarity with Linux More ❯

Role Outline Engineered Arts is seeking a Senior Robot Systems Software Engineer to work on the code that runs directly on our humanoid robots, the glue between sensors, actuators, and cloud services. You’ll build and maintain the real-time and near-real-time systems that make our robots come alive: coordinating motion, perception, speech, and networked behaviour. … This role suits someone who enjoys hands-on debugging, understands hardware–software interaction, and thrives in a multidisciplinary environment spanning mechanical, electrical, and software engineering. Main Responsibilities On-Robot Software Development Design, implement and maintain modules running on Linux-based robot computers (Python, C++, Rust). Interface with sensors, actuators, and controllers over serial, USB, and network … in deployed robots. Qualifications, Knowledge, Key Skills and Experience Essential Bachelor’s or Master’s in Computer Science, Robotics, Electrical/Mechatronics Engineering, or related field Significant experience developing software for hardware-integrated systems (e.g. robotics, IoT, or embedded Linux) Strong programming skills (Preferably Python, Rust and C++) Excellent debugging and profiling ability across system layers Familiarity with Linux More ❯

Senior C++ Software Developer, Python - Financial/Banking Candidates will have 5+ years C++ experience (ideally more) and excellent knowledge of Python - ideally coming from a Financial/Banking background with knowledge of Equities, Futures & Options and Fixed Income and Exchange Connectivity with some Low Latency experience. Job Overview You will work with the Product, Infrastructure and QA teams … to produce high performance, low latency and highly reliable code. Your goal will be to develop software which handle large amount of TPS to drive a highly efficient technology used by several markets around the world. To be successful in this role as a Senior Software Engineer C++, you will be a proponent of agile methodology and … modern software best practices. You can produce detailed technical work in OOP and work with other members of the Development team to produce code of high-quality standards. Ideally, you should have worked in critical systems development in the past. Responsibilities and Duties • Codes, tests, integrates, and documents software.• Provides technical leadership to more junior employees and other teams. More ❯

Senior Software Engineer - London - £120k Please note - this role will require you to work from the London based office three days per week. You must have the unrestricted right to work in the UK to be eligible for this role - this organisation is not able to offer sponsorship. Are you passionate about building cutting-edge technology solutions that … building out our new front-end analytics platform, delivering intuitive, high-performance tools that empower users with real-time insights and advanced visualization capabilities. Collaborate with commercial teams to engineer and optimize processes and analytical models. Build and maintain Python-based services and APIs using modern frameworks and best practices. Develop solutions for data modeling, market analysis, and position More ❯

seamless experience that emphasises simplicity, efficiency, and rapid execution. Our goal is to remove obstacles, enabling you to achieve success faster and more effectively. Role Overview As a Senior Software Engineer, you will play a pivotal role in architecting and developing our next-generation web application and API. This role requires technical leadership, hands-on development, and mentoring … of junior developers. You will drive the adoption of best practices, ensuring scalability, security, and performance. If you are passionate about software development, enjoy solving complex problems, and are ready to lead innovative projects, we encourage you to apply. Join our dynamic team and contribute to building transformative solutions that make a tangible impact. This role will be eligible … Qualifications and Key Skills Education: Bachelor’s in Computer Science or related field from a Tier 1 university. Experience: Minimum of 4 years of full-time professional experience in software development, with strong expertise in TypeScript, ReactJS, and Next.JS. Solid experience in building RESTful APIs Leadership: Proven track record of leading development teams and managing large-scale projects. Database More ❯

seamless experience that emphasises simplicity, efficiency, and rapid execution. Our goal is to remove obstacles, enabling you to achieve success faster and more effectively. Role Overview As a Senior Software Engineer, you will play a pivotal role in architecting and developing our next-generation web application and API. This role requires technical leadership, hands-on development, and mentoring … of junior developers. You will drive the adoption of best practices, ensuring scalability, security, and performance. If you are passionate about software development, enjoy solving complex problems, and are ready to lead innovative projects, we encourage you to apply. Join our dynamic team and contribute to building transformative solutions that make a tangible impact. This role will be eligible … Qualifications and Key Skills Education: Bachelor’s in Computer Science or related field from a Tier 1 university. Experience: Minimum of 4 years of full-time professional experience in software development, with strong expertise in TypeScript, ReactJS, and Next.JS. Solid experience in building RESTful APIs Leadership: Proven track record of leading development teams and managing large-scale projects. Database More ❯

Software Engineer - Compiler Role Overview: Develop and optimize compiler technologies for our RISC-V vector core, focusing on efficient code generation and optimization for graphics and AI workloads. Key Responsibilities: Develop and maintain compiler backend for our RISC-V vector extensions Implement code generation and optimization passes for graphics and AI workloads Contribute to shader compilers for Vulkan More ❯

Software Engineer - Compiler Role Overview: Develop and optimize compiler technologies for our RISC-V vector core, focusing on efficient code generation and optimization for graphics and AI workloads. Key Responsibilities: Develop and maintain compiler backend for our RISC-V vector extensions Implement code generation and optimization passes for graphics and AI workloads Contribute to shader compilers for Vulkan More ❯

Senior Software Engineer – Shopify/FinTech Integrations Full Stack ( Backend-leaning | TypeScript ) London/Hybrid – 1 day per week in-office Up to £90k DOE + MacBook Pro + £600 wellbeing allowance 🚫 Visa sponsorship not available Join a VC-backed, fast-growing startup that’s redefining how customers shop for luxury fashion online. Backed by top-tier investors More ❯

Senior Software Engineer – Shopify/FinTech Integrations Full Stack ( Backend-leaning | TypeScript ) London/Hybrid – 1 day per week in-office Up to £90k DOE + MacBook Pro + £600 wellbeing allowance 🚫 Visa sponsorship not available Join a VC-backed, fast-growing startup that’s redefining how customers shop for luxury fashion online. Backed by top-tier investors 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 ❯

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 ❯

is the core technology crucial to Ki's success – allowing us to evolve underwriting intelligently and unlock massive scale. We're a multi-disciplined team, bringing together expertise in software and data engineering, full stack development, platform operations, algorithm research, and data science. Our squads focus on delivering high-impact features – we favour a highly iterative, analytical approach. We … re looking for a Staff Software Engineer to join our Engineering team. You will provide technical leadership for both delivery squads and the wider engineering organisation. Along with our engineering leadership, you’ll champion engineering excellence and high standards of quality through an environment of continuous improvement. You will be hands-on, directly delivering new impactful software. You … will be able to propose, design, and execute initiatives independently, leading colleagues to deliver on these goals. Principal Accountabilities: - Build robust and scalable software for business critical, web-based applications - Design, build, test, document and maintain API’s and integrations - Develop new functionality in our core Kotlin based services, working in multi-disciplinary teams - Ensure quality control using industry More ❯

is the core technology crucial to Ki's success – allowing us to evolve underwriting intelligently and unlock massive scale. We're a multi-disciplined team, bringing together expertise in software and data engineering, full stack development, platform operations, algorithm research, and data science. Our squads focus on delivering high-impact features – we favour a highly iterative, analytical approach. We … re looking for a Staff Software Engineer to join our Engineering team. You will provide technical leadership for both delivery squads and the wider engineering organisation. Along with our engineering leadership, you’ll champion engineering excellence and high standards of quality through an environment of continuous improvement. You will be hands-on, directly delivering new impactful software. You … will be able to propose, design, and execute initiatives independently, leading colleagues to deliver on these goals. Principal Accountabilities: - Build robust and scalable software for business critical, web-based applications - Design, build, test, document and maintain API’s and integrations - Develop new functionality in our core Kotlin based services, working in multi-disciplinary teams - Ensure quality control using industry More ❯

We refer top candidates to our partners working with the world’s leading AI research labs and fast-growing startups to help build cutting-edge technology. Role: LLM - Sr. Software Engineer – LLM Evaluation & Repository Validation Type of Role: Short-term Contract Engagement Duration: 1 month (with possible extensions) Commitment: 10–40 hrs/week (flexible, partial PST overlap … Date: Immediate Rate Range: $80–$125/hour Project Overview We’re building high-quality evaluation and training datasets to improve how Large Language Models (LLMs) interact with realistic software engineering tasks. Engineers will work on diverse projects such as enabling models to traverse complex code bases or building agents that boost model performance. Role Overview — What Does a … per task using a structured ranking system. Evaluate code diffs for correctness, quality, style, and efficiency. Provide clear, structured rationales for evaluation decisions. Required Skills & Experience Several years of software engineering experience , including 1 + continuous years at product companies Strong expertise in Rust development and deploying scalable, production-grade software. Deep understanding of software architecture, debugging, and More ❯

and digital identity. From automated 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, and architecture – designing services, writing More ❯

and digital identity. From automated 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, and architecture – designing services, writing More ❯