Oxfordshire, Milton Hill, United Kingdom Hybrid / WFH Options
Mars Recruitment
PrincipalSoftwareEngineer | C++ | Python | Linux Oxfordshire | Hybrid £65,000pa plus benefits: Do you enjoy technically leading and mentoring a team of Software Engineers utilising C++ & Python on Linux, passing on your knowledge and experience to help nurture and develop future Engineers? If so, this PrincipalSoftwareEngineer role will be perfect for … you. Our client has seen rapid growth over the last few years, and to help develop their talented team of Software Engineers, they now seek a PrincipalSoftwareEngineer who can technically lead, mentor and develop during an exciting period of innovation. On a day-to-day basis you will develop and support software applications … drivers for a range of products. You will be technically responsible for ensuring projects meet internal and external customer requirements and completing concept designs through to production. The successful PrincipalSoftwareEngineer will need the following qualification, experience and skills: A degree in a Software Engineering, Mathematics or Science/Materials subject Experience in ARM based More ❯
Cheltenham, England, United Kingdom Hybrid / WFH Options
Searchability NS&D
PrincipalSoftwareEngineer – National Security - SC Clearance Role: PrincipalSoftwareEngineer Location: Cheltenham - Hybrid Work Clearance: SC Cleared/Eligible for SC Salary: £75,000 - £95,000 About the Role Searchability NS&D is recruiting a PrincipalSoftware Engineers to join an Agile delivery team supporting a range of complex and high … impact Central Government and Critical National Infrastructure projects. You’ll help design, develop, and deploy bespoke software solutions that deliver real-world mission value. In this senior technical role, you’ll lead a team of software engineers, shape architectural decisions, and engage directly with senior customer stakeholders to deliver high-impact solutions. What You’ll Do Design, develop … and test robust software solutions using modern engineering practices. Work with a range of open-source libraries, frameworks, and components. Build and maintain CI/CD pipelines using tools such as GitLab , ensuring code quality and security. Deploy software systems across public (AWS) and private cloud environments. Engage in all stages of the software lifecycle — from requirements More ❯
Greater Manchester, England, United Kingdom Hybrid / WFH Options
Searchability®
PrincipalSoftwareEngineer – .NET/C#/AWS/CI/CD .NET, C#, AWS, JavaScript, DevOps, Agile, CI/CD Salary up to £75-80k + Bonus scheme Hybrid – 3 days a week on-site (Greater Manchester) For more information, please email me directly at Patrick.doyle@searchability.com or call on 01244 567 920/… self-organising squads, our teams are empowered to design, build, and deliver scalable, high-performance systems that shape the future of our business. We’re now looking for a PrincipalSoftwareEngineer to take a leading role in guiding our engineering direction, mentoring talented developers, and driving the adoption of modern technologies and best practices. Who We … re Seeking: We’re seeking a PrincipalSoftwareEngineer with deep expertise in .NET, C# and AWS who will play a key part in architectural decision-making, helping teams balance innovation and reliability while championing best practices. You’ll work closely with other Principal Engineers, Product Owners, and cross-functional teams to deliver robust, maintainable, and More ❯
PrincipalSoftwareEngineer – Full Stack (Java/React) Level: Senior/Principal - £80,000–£95,000 Location: UK-wide | Hybrid (Client site travel as required) Function: Full Stack Development | Agile Delivery | Technical Leadership Industry: Consulting | Public Sector | Digital Transformation Base office: Manchester, Bristol, Cheltenham, or Plymouth Lead software excellence. Deliver strategic impact. Join a specialist … UK software consultancy delivering high-impact software solutions for public sector clients. They are seeking PrincipalSoftware Engineers to lead teams, shape delivery strategy, and drive innovation across government projects. About the Role As a PrincipalSoftwareEngineer, you will lead multiple teams, combining hands-on full stack development with technical leadership and … You will ensure the delivery of scalable, high-quality solutions and mentor engineers to achieve both team and project success. What You’ll Be Doing • Leading and mentoring two software teams across full lifecycle projects • Designing, developing, testing, and deploying software using Java and React • Engaging directly with clients to understand requirements and deliver high-value solutions • Driving More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Austin Werner
PrincipalSoftwareEngineer | High-growth, Purpose-Led and A* funded Fintech | Hybrid – London **Python, TypeScript, React** A leading fintech scale-up is hiring a Senior SoftwareEngineer to join its high-performing engineering organisation in London. This is an opportunity to contribute to a platform designed to improve finance globally — with real impact at scale. … first platform. Backed by leading venture capital and impact investors, the organisation is entering a new phase of growth, with engineering at the core. The Opportunity As a Senior Engineer, you will play a key role in designing and delivering scalable, reliable systems that handle significant volumes of real-time data and transactions. You'll collaborate with product, data … and platform teams to deliver high-impact features that directly improve user financial wellbeing. This is a hands-on role for an engineer who values clean architecture, measurable outcomes, and meaningful user impact. What You’ll Do: Design and implement distributed systems that are resilient, scalable, and secure. Own technical decision-making across architecture and implementation — selecting the right More ❯
PrincipalSoftwareEngineer - Frontend London (Remote First - Occasional travel) Salary: £95,000 - £120,000 + equity + benefits An established, global technology business within the hospitality-tech industry is seeking a talented Principal Frontend SoftwareEngineer to help build and scale cutting-edge digital solutions. This is a chance to work on greenfield projects … vision with practical delivery to ensure reliable, scalable solutions. What do I need to be successful: Degree in Computer Science or equivalent hands-on experience. 7+ years in frontend software development, including experience in a lead or principal engineering capacity. Deep expertise in React, TypeScript, and modern frontend architecture (state management, component design, performance optimisation). Strong understanding More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Oliver Bernard
PrincipalEngineer - Python, AWS, React, Microservices OB have exclusively partnered with an AI Consulting firm who work with enterprise scale clients to transform them into AI & Data transformed businesses. Knowing how AI can transform enterprise scale companies, they are looking to bring in a number of highly skilled Principal Level Engineers to their team, to work on … many more. The roles will be heavily weighted toward the Backend (80/20), but you will be expected to work across the Frontend and with Cloud-native Architectures. PrincipalEngineer - Python, AWS, React, Microservices 8+ years of commercial experience Experience guiding multiple teams and helping set technical direction My have strong demonstrated knowledge of Python Knowledge of … working A Consulting background will be highly advantageous Pays £120k-£135k - + discretionary bonus + excellent benefits package Hybrid working with 3-days a week required in London offices PrincipalEngineer - Python, AWS, React, Microservices More ❯
PrincipalSoftwareEngineer - Frontend London (Remote First - Occasional travel) Salary: £95,000 - £120,000 + equity + benefits An established, global technology business within the hospitality-tech industry is seeking a talented Principal Frontend SoftwareEngineer to help build and scale cutting-edge digital solutions click apply for full job details More ❯
Leeds, England, United Kingdom Hybrid / WFH Options
WRK digital
PrincipalSoftwareEngineer & Tech Lead 📍 Leeds HQ (Flexible, Hybrid working) 💡AI-Driven Solutions & Digital Transformation Are you a Principal-level engineer who wants to shape the future of AI-enabled digital products? WRK digital is partnering with Parallax — a digital transformation consultancy pushing the boundaries of what AI can do for enterprise clients — to find … should apply if: • You have demonstrable experience building or delivering AI-enabled products • You are an expert in Next.js (or similar), React, and AWS with a deep understanding of software architecture • You balance technical leadership with hands-on coding—you are comfortable in both the boardroom and the codebase • You have high emotional intelligence and enjoy consultancy-style client … flexible working, gym/streaming subsidies • The opportunity to work on AI projects that matter Ready to lead the future of AI-Driven digital products? If you are a Principal or senior engineer looking for a role where you can blend strategic thinking, client consultancy, and hands-on engineering — this is it. Please apply now or contact James More ❯
Reading, Oxfordshire, United Kingdom Hybrid / WFH Options
Innovate Recruitment Ltd
Role: PrincipalSoftwareEngineer Location: Berskhire (Onsite) Industry: Intelligence, Defence Salary: Competitive + Allowance + Bonus + Benefits Join a cutting edge engineering team developing high-performance embedded and application software for complex systems in the Intelligence/Cyber world. As a Lead SoftwareEngineer, you ll provide technical leadership across the full software lifecycle from requirements and architecture through to design, implementation, and test. Key Responsibilities: Lead and contribute to software design, development, and verification for embedded and application systems. Define architectures, review code, and ensure delivery to quality, cost, and schedule. Apply modern engineering practices (CI/CD, DevSecOps, TDD/BDD). Mentor junior engineers and drive best practice … About You: Degree (or equivalent) in Engineering, Computer Science, or related field. Strong experience in C/C++ and embedded or Linux development. Skilled in object-oriented design and software lifecycle management. Familiar with real-time systems, testing frameworks, and modern development tools. What s on offer: Competitive salary, bonus & allowance. Strong pension and flexible benefits. Hybrid working and More ❯
Reading, Berkshire, United Kingdom Hybrid / WFH Options
Innovate Recruitment Ltd
Role: PrincipalSoftwareEngineer Location: Berskhire (Onsite) Industry: Intelligence, Defence Salary: Competitive + Allowance + Bonus + Benefits Join a cutting edge engineering team developing high-performance embedded and application software for complex systems in the Intelligence/Cyber world. As a Lead SoftwareEngineer, you’ll provide technical leadership across the full software lifecycle from requirements and architecture through to design, implementation, and test. Key Responsibilities: Lead and contribute to software design, development, and verification for embedded and application systems. Define architectures, review code, and ensure delivery to quality, cost, and schedule. Apply modern engineering practices (CI/CD, DevSecOps, TDD/BDD). Mentor junior engineers and drive best practice … About You: Degree (or equivalent) in Engineering, Computer Science, or related field. Strong experience in C/C++ and embedded or Linux development. Skilled in object-oriented design and software lifecycle management. Familiar with real-time systems, testing frameworks, and modern development tools. What’s on offer: Competitive salary, bonus & allowance. Strong pension and flexible benefits. Hybrid working and More ❯
Bristol, Avon, South West, United Kingdom Hybrid / WFH Options
Platform Recruitment Limited
Bristol Principal Embedded SoftwareEngineer - £80k + great benefits! My client is a leading engineering firm, developing software and hardware for a range of regulated industries. They are looking for a Principal Embedded SoftwareEngineer to join their highly motivated team. This is a very interesting opportunity providing the right candidate the opportunity … Tech Stack/Skills required : -Embedded C -RTOS or MCU experience - Regulated industry experience - Team leadership experience you will be able to mentor and lead a team of embedded software engineers. The competitive salary is between £70-80k + great benefits! If youre interested please apply below More ❯
PrincipalSoftwareEngineer .NET £90,000-£100,000 Remote (UK) Are you passionate about writing clean, scalable code and ready to shape a platform used by merchants across the globe? We're working with a fast-growing global payment processing platform that’s scaling rapidly after a major acquisition. They are building a high-performance, merchant-first … ecosystem that prioritises quality, resilience, and scalability - and they are searching for .Net Software Engineers to join them on their growth journey. What You’ll Do: Architect and build core platform services, APIs, and portals that deliver real business impact. Elevate performance and reliability using smart, efficient engineering. Instill best practices in system design, quality, and delivery. Collaborate across More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Primis
PrincipalSoftwareEngineer .NET £90,000-£100,000 Remote (UK) Are you passionate about writing clean, scalable code and ready to shape a platform used by merchants across the globe? We're working with a fast-growing global payment processing platform that’s scaling rapidly after a major acquisition. They are building a high-performance, merchant-first … ecosystem that prioritises quality, resilience, and scalability - and they are searching for .Net Software Engineers to join them on their growth journey. What You’ll Do: Architect and build core platform services, APIs, and portals that deliver real business impact. Elevate performance and reliability using smart, efficient engineering. Instill best practices in system design, quality, and delivery. Collaborate across More ❯
Bicester, Oxfordshire, South East, United Kingdom Hybrid / WFH Options
Gerrell & Hard
Lead SoftwareEngineer IoT & Full-Stack Location: Hybrid/Bicester Type: Permanent Salary: Competitive, market-based TUAL Technology is an innovative, VC-backed start-up based in Bicester, developing PowerUp a high-power EV charging solution designed for grid-constrained sites. By integrating battery storage, smart energy management, and ultra-fast DC charging, TUAL delivers seamless electrification where … traditional grid capacity falls short. Working with enterprise customers across Europe, TUAL is transforming the productivity and profitability of electric commercial vehicle fleets through a portfolio of intelligent, software-defined, cloud and IoT-enabled charging solutions. The Role Were looking for a hands-on Lead SoftwareEngineer to own the design and delivery of our IoT and … cloud software platform. Youll connect our ultra-fast chargers, manage data and remote control functions, and ensure security and scalability across our systems. Youll work directly with the VP Product and VP Power Electronics, shaping architecture, integrations and performance turning ideas into real, working solutions. ________________________________________ What Youll Do Build IoT and cloud software for charger connectivity and monitoring More ❯
Bicester, Oxfordshire, United Kingdom Hybrid / WFH Options
Gerrell & Hard
Lead SoftwareEngineer IoT & Full-Stack Location: Hybrid/Bicester Type: Permanent Salary: Competitive, market-based TUAL Technology is an innovative, VC-backed start-up based in Bicester, developing PowerUp a high-power EV charging solution designed for grid-constrained sites. By integrating battery storage, smart energy management, and ultra-fast DC charging, TUAL delivers seamless electrificatio click More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Hargreaves Lansdown
Be part of HL's future. Be part of the future of investing. Shape it with us. What You'll Be Doing Building and deploying scalable, secure, and compliant software at pace. Integrating HL web and mobile apps with existing and new systems to deliver a seamless client experience across a range of products and services. Delivering value iteratively … outcomes with HL's mission and client value. Championing a culture of continuous learning, cross-functional collaboration, and inclusivity with a growth mindset. About You 8-10 years of software development experience within large-scale, regulated environments - ideally in Investment, Asset or Wealth Management. Solid experience in building and deploying frontend applications in React or React Native with hands …/TypeScript JavaScript/iOS (Swift) or Android (Kotlin) RDBMS (Oracle/Sybase)/NoSQL databases (Document DB) AWS and cloud-native microservices containerised architecture (e.g. K8s, Docker) Modern software engineering practices with CI/CD pipelines and DevOps principles TDD/BDD testing frameworks Desirable Java (21) and Spring Boot Interview Process 3 Stage Interview Stage 1 - Discussion More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Hargreaves Lansdown
Be part of HL's future. Be part of the future of investing. Shape it with us. What You'll Be Doing Building and deploying scalable, secure, and compliant software at pace. Integrating HL web and mobile apps with existing and new systems to deliver a seamless client experience across a range of products and services. Delivering value iteratively … HL's mission and client value. Championing a culture of continuous learning, cross-functional collaboration, and inclusivity with a growth mindset. About You 8-10 years of experience in software engineering , with a strong track record of delivering complex, user-facing applications in regulated, large-scale environments , ideally within Investment, Asset, or Wealth Management . Deep expertise in React More ❯