1 to 25 of 35 Principal Software Engineer Jobs in the UK

Principal Software Engineer – C++ Salary - £65K-£85K negotiable depending on experience plus competitive benefits package including pension, 25 days holiday and life assurance. Location – Portsmouth, Hants, Hybrid Our client is a rapidly growing software and data science consultancy firm, renowned for their reputation and keen ability … understand and meet customer requirements effectively. Their team is dedicated to delivering high-quality, end-to-end software and data science services. This role offers the opportunity to work with these teams to operate across multiple sectors, including defence, energy, transport, and health, and contribute to the development ...

Principal Software Engineer Hours: 40h p/w Location: Hybrid or Remote Salary:60k-70k Build the platforms that power better travel money At eurochange , we're transforming foreign exchange — making it better, simpler and more convenient for millions of customers. Technology is at the heart … that journey, and we're looking for a Principal Software Engineer to help shape the platforms that drive our digital future. This is a senior, hands-on technical leadership role where you'll influence architecture, guide engineering standards, and deliver enterprise-grade solutions that scale with ...

Principal Software Engineer Edinburgh An innovative and well-established med tech company are seeking a proven technical leader to join its R&D team basedin central Edinburgh as a Principal Software Engineer. This is a unique opportunity to play a key role in the development … remain hands on and ship code whilst making key architectural decisions, driving the roadmap, and contributing to building a high performing dev culture ...the Principal role is ideal. You will be part of a cutting-edge company at the forefront of healthcare technology. Contribute to a high-performance culture ...

Principal Software Engineer – Manchester – eCommerce - 90k+10% Bonus Great opportunity for a Principal Software Engineer to join a Manchester based eCommerce giant as they work on a large-scale digital re-platform across the estate to MACH and Event-Driven Architecture. Key Technical Skills JavaScript ...

Principal Software Engineer - Manchester - eCommerce - 90k% Bonus Great opportunity for a Principal Software Engineer to join a Manchester based eCommerce giant as they work on a large-scale digital re-platform across the estate to MACH and Event-Driven Architecture. Key Technical Skills JavaScript ...

Principal Software Engineer – Manchester – eCommerce If you are considering sending an application, make sure to hit the apply button below after reading through the entire description. - 90k10% Bonus Great opportunity for a Principal Software Engineer to join a Manchester based eCommerce giant as they ...

Principal Software Engineer Fully Remote | Permanent | Competitive Salary + Benefits Harrington Starr has partnered with a leading Global Payments Technology company who are seeking to hire a Principal Software Engineer to join their senior engineering leadership team. This is a rare opportunity to combine … performance systems at global scale. Career progression in a fast-growing international technology business. Key skills required: 10+ years’ experience in enterprise architecture and software engineering. Proven expertise in .NET with strong SaaS and API platform experience. Hands-on track record designing highly scalable, high-performance systems. Strong leadership ...

Principal Software Engineer Portsmouth | Hybrid, 3 days onsite £75,000-£85,000 plus bonus and benefits This Principal Software Engineer role is designed for a hands-on technical leader with strong C++ and Unreal Engine expertise, working at the forefront of complex, performance-critical … software delivery. The role combines advanced engineering with genuine technical authority, shaping how simulation-driven and autonomy-focused systems are designed, built and evolved. The position sits within a fast-growing software and data science consultancy delivering end-to-end solutions across defence, energy, transport and health. ...

Principal Software Engineer Portsmouth Hybrid, 3 days onsite £75,000-£85,000 plus bonus and benefits This Principal Software Engineer role is designed for a hands-on technical leader with strong C++ and Unreal Engine expertise, working at the forefront of complex, performance-critical … software delivery. The role combines advanced engineering with genuine technical authority, shaping how simulation- click apply for full job details ...

Principal Software Engineer Edinburgh An innovative and well-established med tech company are seeking a proven technical leader to join its R&D team basedin central Edinburgh as a Principal Software Engineer. This is a unique opportunity to play a key role in the development ...

Title: Lead/Principal Embedded Software Engineer Location: Gloucester (On-Site Working) Salary: Up to £85,000 (Depending on Experience) Summary of Vacancy: We’re currently recruiting for a Principal Embedded Software Engineer on behalf of a cutting-edge Security Research & Development organisation. This … novel and secure solutions that push technical boundaries. You’ll be working in a deeply technical, collaborative environment that prioritises engineering excellence. As a Principal Engineer, you’ll lead development efforts for secure embedded systems, working hands-on with code while also guiding and mentoring others. ...

Principal Software Engineer/Tech Lead/Founding Engineer opportunity - Tech Start-Up- Remote UK wide - Up to 120k Morson Edge are delighted to have teamed up with a Tech4Good start up on their search for their first Software Engineering hire. The client are completely … open on what the title of this role is but I would say the responsibilities will be comparable to Principal/Tech Lead in most organisations. The company is on a mission to improve the mental health and wellbeing of millions of people. They’re well-funded ...

Great opportunity for a Principal Software Engineer to work for a retail company near Manchester at the beginning of a digital transformation. You'd report to the Head of Engineering and would work as part of a team of Principal Software Engineers responsible for collaborating ...

Principal Software Engineer Luton 12-Month Contract Paying up to £79p/h (Inside IR35) Please note - due to the nature of the work, you will need to hold or be eligible to obtain a high level of UK Security clearance – please only apply if suitable … Responsibilities: Develop robust applications using C# .NET within a Windows environment. Take ownership of complex tasks across the full software lifecycle—from requirements to integration, testing, and delivery. Apply object-oriented design principles and verification/validation techniques. Collaborate with a skilled team while maintaining independence in your work. ...

Opportunity for a Principal Software Engineer to work for a retail company at the beginning of a large digital transformation on an initial 6-month contract outside IR35. You'd report to the Head of Engineering and would work as part of a team of Principal Software Engineers responsible for collaborating with Architects and Product Owners to lead the re-architecture of existing platforms to a cloud-native, event-driven, microservices architecture. Whilst there is no line management, you'd have full technical overview for your product domain including technology vision, strategy, workload ...

Great opportunity for a Principal Software Engineer to work for a retail company near Manchester at the beginning of a digital transformation. You'd report to the Head of Engineering and would work as part of a team of Principal Software Engineers responsible for collaborating ...

Opportunity for a Principal Software Engineer to work for a retail company at the beginning of a large digital transformation on an initial 6-month contract outside IR35. You'd report to the Head of Engineering and would work as part of a team of Principal Software Engineers responsible for collaborating with Architects and Product Owners to lead the re-architecture of existing platforms to a cloud click apply for full job details ...

Principal Software Developer – Manchester (central) 3 days a week in office with flexible start/finish – strong benefits – up to £90,000 (flexible for the right person) I’m working with a high‐growth tech business looking for a Principal Software Developer to take a leading … tech‐driven leadership team. What you’ll bring.. • Deep expertise in .NET (C#, ASP.NET) with strong ReactJS experience • Proven track record delivering production‐grade software end‐to‐end • Experience integrating AI/LLM features into real systems • Strong SQL/T‐SQL, Redis, ElasticSearch/OpenSearch, and distributed systems ...

Principal Software Engineer Basildon 3-Month Contract Paying up to £70p/h (Inside IR35) Please note - due to the nature of the work, you will need to hold or be eligible to obtain a high level of UK Security clearance - please only apply if suitable … Responsibilities: C++ software development Development of new applications to meet user expectations and within formal constraints Developing Windows & Linux application Required Skillset: Understanding and knowledge of one or more of the following: C++ software development Experience using Rhapsody Development of new applications to meet user expectations and within ...

Principal Software Engineer - C++/Unreal | Defence Modelling & Simulation Leading the next generation of synthetic environments for UK Defence. This is a high-impact role for a technical authority to join a consultancy founded by industry experts. You will steer the development of complex digital twins … teams. Commercial Drive: Take ownership of bid management and technical proposal authoring. The Essentials Sole British Nationality is required. Minimum 7+ years’ experience in Software Expert proficiency in C++ and Unreal Engine Proven ability to apply mathematical principles to scientific problem-solving. The Rewards + 7% employer pension. Private ...

Principal Software Engineer Hours: 40h p/w Location: Hybrid or Remote Salary:60k-70k Build the platforms that power better travel money At eurochange , we're transforming foreign exchange - making it better, simpler and more convenient for millions of customers click apply for full job details ...

Ultra PCS is a leader in providing solutions for aerospace and defence systems. We are seeking an experienced Software Engineer to join our team. We are searching for a dynamic highly skilled Software Engineer with a wide breadth of skills who is interested in applying those … skills and furthering their development skillset on a variety of software projects. As a Principle Software Engineer, you will be expected to produce C++ code to produce custom plugins for our EAK GVA platform. The successful applicant will have experience in distilling requirements from interactions with ...

Principal Software Engineer This is a pivotal technical leadership role within a rapidly growing consultancy. You will spearhead the design of complex digital twins and synthetic environments, providing high-level strategic advice on innovation to key UK defence stakeholders. The essentials Sole British nationality is required … this position. At least 7+ years of experience in software engineering Proficient in C++ and Unreal 5 Strong background in mathematical principles or statistical problem-solving within scientific fields. Your package A comprehensive private healthcare scheme and health cash plan The work Technical Leadership: Lead ...

Principal Java Engineer Java | Kotlin | Cloud Native At a glance Principal level backend role with architectural ownership Java and Kotlin microservices in a cloud native environment Hybrid working in Belfast Salary up to £80k plus bonus The role As a Principal Java Engineer, you will … area, shaping architecture, guiding engineering standards and influencing how scalable backend systems are designed and delivered. You will work closely with Senior, Staff and Principal Engineers across Belfast and the wider global engineering organisation, contributing to large scale distributed systems while acting as a technical authority within the team. ...

scalable solutions deliver critical patient data across local and remote systems, enabling better decisions, increased efficiency, and safer care. We’re seeking a Principal Software Engineer to lead the development of our Patient Monitoring and Connectivity (PMC) products. This hands-on role combines technical leadership with deep … expertise in software design and development. You'll collaborate across functions to architect, build, and deliver next-generation patient monitoring solutions that meet rigorous performance, usability, and cybersecurity standards. Key Responsibilities: Lead software architecture, design, and development for PMC products Define and review requirements, connectivity, and UI designs ...