to do what others think is impossible. Our employees are not only part of history, they're making history. Northrop Grumman Space Systems in Linthicum, MD is seeking a Principal or Senior Principal Systems Engineer to join our Payload Systems Engineering Team as an Interfaces Lead . As a member of this team, you will have the … wide variety of expertise within the systems engineering domain. This includes mission engineering, requirements, architecture, modeling and simulation, integration and test, and verification and validation. As the Interfaces Lead Engineer , you will be responsible for the negotiation and documentation of Payload Internal and External interfaces. This role may include, but is not limited to, the following: Ability to work … not prevent meeting, payload level requirements Ensuring that all interfaces are well defined and contain all necessary attributes in the Cameo model This position can be staffed at a Principal or Sr. Principal level , based on the basic qualifications below. In addition, this position can be based in Linthicum, MD or Rolling Meadows, IL. The basic qualifications you More ❯
Crawley, England, United Kingdom Hybrid / WFH Options
People's Partnership
PrincipalEngineer About People’s Partnership: At the heart of our not-for-profit organisation is a commitment and a motivation to make the future-saving experience a simple one for our members. We champion fairness and simplicity, not profit-chasing. Imagine a financial adventure where everyone's a winner, fuelled by our exceptional service and brought to … with a flexible, hybrid working approach, ensuring everyone gets the opportunity to come to work and be the best version of themselves. What you'll be doing: As a PrincipalEngineer for our dynamic and growing team, you will play a crucial role in architecting the development and maintenance of our applications, ensuring optimal system structures, efficiency, and More ❯
chichester, south east england, united kingdom Hybrid / WFH Options
People's Partnership
PrincipalEngineer About People’s Partnership: At the heart of our not-for-profit organisation is a commitment and a motivation to make the future-saving experience a simple one for our members. We champion fairness and simplicity, not profit-chasing. Imagine a financial adventure where everyone's a winner, fuelled by our exceptional service and brought to … with a flexible, hybrid working approach, ensuring everyone gets the opportunity to come to work and be the best version of themselves. What you'll be doing: As a PrincipalEngineer for our dynamic and growing team, you will play a crucial role in architecting the development and maintenance of our applications, ensuring optimal system structures, efficiency, and More ❯
Los Angeles, California, United States Hybrid / WFH Options
Cannon Corp
clients in the energy industry, water resources, public infrastructure, and commercial and residential development. We work hard. We play hard. We have fun. JOIN CANNON as a CIVIL SENIOR PRINCIPALENGINEER in WATER RESOURCES in WEST LOS ANGELES. West Los Angeles is known for its many popular recreational opportunities and our office is conveniently located adjacent to the … INCLUDE Wastewater Treatment Facilities, Collection Facilities, Water Distribution Systems, Water Treatment Plants, Storm Drainage Collection Systems and Facilities, Water Main Replacements, Potable Water Pump Stations and Reservoirs. CIVIL SENIOR PRINCIPALENGINEER JOB SUMMARY As a California licensed PE, responsible for project management (scope, schedule, budget, and business development), preparing engineering reports and analyses, designing, and preparing plans, specifications …/Water Resources projects. Assignments include mentoring less-experienced team members. In this role, the Project Manager will be responsible for obtaining new business (seller-doer). CIVIL SENIOR PRINCIPALENGINEER JOB DUTIES Concurrently manages a variety of civil engineering Public Works-Water Resources projects. Tracks project scope, budgets, and schedules to ensure fulfillment of contract commitments and More ❯
Bagshot, Surrey, United Kingdom Hybrid / WFH Options
Telent
PrincipalEngineer - Wireless Job Description When you join our Engineering Team at Telent, you'll be empowered to innovate and drive common solutions, working closely with technical experts who are proud of the impact their work makes. Come join a high-performing team doing complex and critical work. Help build and keep the nation's critical infrastructure connected … and protected 24/7. Reporting into the Head of Focal Engineering, the PrincipalEngineer will work on a number of exciting Wireless Design and Implementation projects for customers across England in the Education and Government sectors as well as others. This is a hybrid working role, with a requirement to travel to our customer sites on occasion. … design and implementation of enterprise-grade wireless network solutions across universities in England, leveraging Cisco and Juniper technologies to deliver secure, scalable, and high-performance connectivity. Act as the principal design authority, setting technical direction, standards, and best practices for campus wireless and wired infrastructure, ensuring alignment with university digital transformation objectives. Develop and review detailed low-level designs More ❯
GU15 1PQ, Bagshot, Surrey, United Kingdom Hybrid / WFH Options
Telent
PrincipalEngineer - Wireless Job Description When you join our Engineering Team at Telent, you'll be empowered to innovate and drive common solutions, working closely with technical experts who are proud of the impact their work makes. Come join a high-performing team doing complex and critical work. Help build and keep the nation's critical infrastructure connected … and protected 24/7. Reporting into the Head of Focal Engineering, the PrincipalEngineer will work on a number of exciting Wireless Design and Implementation projects for customers across England in the Education and Government sectors as well as others. This is a hybrid working role, with a requirement to travel to our customer sites on occasion. … design and implementation of enterprise-grade wireless network solutions across universities in England, leveraging Cisco and Juniper technologies to deliver secure, scalable, and high-performance connectivity. Act as the principal design authority, setting technical direction, standards, and best practices for campus wireless and wired infrastructure, ensuring alignment with university digital transformation objectives. Develop and review detailed low-level designs More ❯
that our customers rely on to achieve mission success. Join the Space revolution and make the impossible, possible. Northrop Grumman's Space Systems Sector has an opening for a Principal Cyber Systems Engineer/Senior Principal Cyber Systems Engineer to join our team of qualified, diverse individuals, and the position will be located in Redondo Beach … CA. This position may be filled as a Level 3 Principal Cyber Systems Engineer or Level 4 Sr. Principal Cyber Systems Engineer. Additionally, this position is contingent upon the candidate obtaining final clearances and program access(es) within a reasonable period of time as determined by the company. Continued employment thereafter will be subject to maintenance of … decompose requirements to satisfy security principles: Confidentiality, Integrity, and Availability as well as Resilience across the system (Elements, Subsystem, Components) and associated cyber metrics Basic Qualifications for Level 3 Principal Cyber Systems Engineer: -Bachelor's Degree in a STEM (Science, Technology, Engineering or Mathematics) discipline and 5+ years of engineering experience OR -Master's Degree in a STEM More ❯
Stoke Gifford, Gloucestershire, United Kingdom Hybrid / WFH Options
Synoptix
Principal Systems Engineer The Role: As a Principal Systems Engineer at Synoptix you will be helping guide the scope and direction of the engineering projects you are working on. As an agile business in the true sense the principalengineer will be given the relative freedom to take ownership at the strategic level of More ❯
Bristol, Stoke Gifford, Gloucestershire, United Kingdom Hybrid / WFH Options
Synoptix
Principal Systems Engineer The Role: As a Principal Systems Engineer at Synoptix you will be helping guide the scope and direction of the engineering projects you are working on. As an agile business in the true sense the principalengineer will be given the relative freedom to take ownership at the strategic level of More ❯
Bristol, Avon, South West, United Kingdom Hybrid / WFH Options
Synoptix Limited
Principal Systems Engineer The Role: As a Principal Systems Engineer at Synoptix you will be helping guide the scope and direction of the engineering projects you are working on. As an agile business in the true sense the principalengineer will be given the relative freedom to take ownership at the strategic level of More ❯
Cambridge, Cambridgeshire, East Anglia, United Kingdom
Singular Recruitment
Principal RF Engineer As the selected Principal RF Engineer , your role will be split between designing RF systems at component level, and providing technical leadership for the development of projects. The right candidate will have a solid background in RF design, experience of taking a leading role on engineering projects and be an excellent communicator. The … role is an 80/20 split in favour of design to leadership. Responsibilities for the role of Principal RF Engineer will include: Designing and developing RF systems at the component level. Conducting performance tests and optimizations to meet specified performance criteria. Leading integration and prototyping efforts to ensure seamless integration of sub-systems with larger systems or … support on technical issues. Engage in project management activities, such as updating project timelines, managing resources, and communicating with stakeholders to ensure project milestones are met. As the selected Principal RF Engineer, your experience will include: RF electronics design background. Strong ability to demonstrate technical leadership within a product development environment. Experience of specifying technical requirements and taking More ❯
Principal Systems Engineer The Role: As a Principal Systems Engineer at Synoptix you will be helping guide the scope and direction of the engineering projects you are working on. As an agile business in the true sense the principalengineer will be given the relative freedom to take ownership at the strategic level of More ❯
Principal Systems Engineer The Role: As a Principal Systems Engineer at Synoptix you will be helping guide the scope and direction of the engineering projects you are working on. As an agile business in the true sense the principalengineer will be given the relative freedom to take ownership at the strategic level of More ❯
Camberley, England, United Kingdom Hybrid / WFH Options
Telent
PrincipalEngineer - Wireless Job Description When you join our Engineering Team at Telent, you'll be empowered to innovate and drive common solutions, working closely with technical experts who are proud of the impact their work makes. Come join a high-performing team doing complex and critical work. Help build and keep the nation's critical infrastructure connected … and protected 24/7. Reporting into the Head of Focal Engineering, the PrincipalEngineer will work on a number of exciting Wireless Design and Implementation projects for customers across England in the Education and Government sectors as well as others. This is a hybrid working role, with a requirement to travel to our customer sites on occasion. … design and implementation of enterprise-grade wireless network solutions across universities in England, leveraging Cisco and Juniper technologies to deliver secure, scalable, and high-performance connectivity. Act as the principal design authority, setting technical direction, standards, and best practices for campus wireless and wired infrastructure, ensuring alignment with university digital transformation objectives. Develop and review detailed low-level designs More ❯
London, South East, England, United Kingdom Hybrid / WFH Options
Computer Futures
Principal Software Engineer - Lead the Future of UK GovTech Innovation Up to £100,000 + Premium Benefits Package Remote-First | Just 1 Day Onsite Every 2 Weeks SC Clearable | British Citizens Only Where Technology Meets Purpose Are you ready to lead engineering efforts that directly impact national security, public services, and digital transformation across the UK? This is … more than just a job-it's a chance to build technology that matters , in a space where innovation meets mission-critical delivery. We're looking for a Principal Software Engineer to join a high-performing team at the forefront of UK GovTech. You'll architect secure, scalable platforms, mentor elite engineers, and shape technical strategy across programmes … that serve millions of citizens and protect national interests. Your Mission As a PrincipalEngineer, you'll be a technical leader, strategic thinker, and hands-on problem solver. You'll work closely with delivery teams, stakeholders, and government partners to ensure solutions are robust, secure, and future-proof. What You'll Be Doing: Architect cloud-native platforms using More ❯
Principal Hardware Engineer | Marine | AUV | Robotics | Harwell – Hybrid | £65,000pa - £70,000pa plus share scheme & benefits: A once in a lifetime opportunity has arisen for a passionate Principal Hardware Engineer to join a stealth robotics company based in the Oxfordshire area. This amazing business and AUV submersible robot have massive potential across a range of different … industry sectors. The Principal Hardware Engineer will lead in the design, integration, and testing of advanced hardware systems for autonomous underwater vehicles (AUVs) and remotely operated vehicles (ROVs). In this role, you will be responsible for developing mission-critical electronics and system architectures that operate reliably in challenging marine environments. If you’re passionate about robotics within … the maritime industry and the autonomous vehicle and unmanned vehicle industry, you honestly need to make contact with us, this Principal Hardware Engineer role is not to be missed. Candidates must be British Citizens or have lived in the UK for a minimum of 5 years, due to needing SC clearance. Key Responsibilities: Lead the architecture and development More ❯
Employment Type: Permanent
Salary: £70000 - £75000/annum plus share options & benefits
PrincipalEngineer – Technology Consulting – Java/Spring London, Leeds, Manchester or Newcastle | Permanent | Hybrid (3 days onsite) £87,000–£118,000 + up to 20% bonus + exceptional benefits Join a forward-thinking technology consultancy as a PrincipalEngineer and take the lead on delivering complex, high-impact solutions for clients across the UK. This is More ❯
Employment Type: Full-Time
Salary: £87,000 - £118,000 per annum, Inc benefits
PrincipalEngineer – Technology Consulting – Java/Spring London, Leeds, Manchester or Newcastle | Permanent | Hybrid (3 days onsite) £87,000–£118,000 + up to 20% bonus + exceptional benefits Join a forward-thinking technology consultancy as a PrincipalEngineer and take the lead on delivering complex, high-impact solutions for clients across the UK. This is More ❯
Employment Type: Full-Time
Salary: £87,000 - £118,000 per annum, Inc benefits
Newcastle Upon Tyne, Tyne and Wear, England, United Kingdom
Reed
PrincipalEngineer – Technology Consulting – Java/Spring London, Leeds, Manchester or Newcastle | Permanent | Hybrid (3 days onsite) £87,000–£118,000 + up to 20% bonus + exceptional benefits Join a forward-thinking technology consultancy as a PrincipalEngineer and take the lead on delivering complex, high-impact solutions for clients across the UK. This is More ❯
Employment Type: Full-Time
Salary: £87,000 - £118,000 per annum, Inc benefits
Oxfordshire, Milton Hill, United Kingdom Hybrid / WFH Options
Mars Recruitment
Principal Software Engineer | 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 Principal Software Engineer 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 Principal Software Engineer 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 and 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 Principal Software Engineer will need the following qualification, experience and skills: A degree in a Software Engineering, Mathematics or Science/Materials subject Experience in ARM based software developments using C/C++ Experience More ❯
Manchester, Lancashire, England, United Kingdom Hybrid / WFH Options
Searchability
Principal Software Engineer - .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 or call on/Who We Are: We're a fast … 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 Principal Software Engineer 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 Principal Software Engineer 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 scalable solutions More ❯
Nottingham, Nottinghamshire, England, United Kingdom Hybrid / WFH Options
Digital Waffle
Principal SecOps Engineer - Hybrid - Nottinghamshire - Up to £75000 + Bonus We're seeking an experienced Principal SecOps Engineer to take a leading role in strengthening our clients' security operations. This is a hands-on, strategic position within the Technical Operations team, where you'll set the direction for security practices, guide incident response, and support the … Healthcare cash plan, company pension, life assurance, and recognition schemes Flexible hybrid working model, with ongoing training and career development A vibrant culture with regular team socials and events Principal SecOps Engineer - Hybrid - Nottinghamshire - Up to £75000 + Bonus More ❯
Position : Principal Salesforce Engineer Location : Leeds, Bristol, Bournemouth, Tunbridge Wells, Middlesbrough (hybrid/flexible) Salary : £100,000 to £110,000 (DOE) + bonus and excellent benefits Summary A leading financial services organisation is looking for a Principal Salesforce Engineer to take a pivotal role in its digital transformation. You will lead engineering teams to design and … deliver enterprise-scale Salesforce solutions, integrated with .NET and Azure platforms, supporting business-critical systems and improving customer experience. Principal Salesforce Engineer Responsibilities • Lead Salesforce-focused product engineering teams, driving delivery of transformation projects • Provide technical direction, hands-on code reviews, and enforce engineering best practice • Collaborate with Product Owners, Scrum Masters, and business stakeholders to ensure outcomes … and deliver engineering strategy as part of the leadership team • Evaluate emerging Salesforce technologies and wider solutions for enterprise adoption • Ensure systems meet performance, scalability, security, and regulatory requirements Principal Salesforce Engineer Requirements • Proven experience leading Salesforce engineering teams within large enterprises • Strong expertise across the Salesforce ecosystem, including integration with multiple platforms • Experience with Azure, .NET services More ❯
Bracknell, Bracknell Forest, Berkshire, United Kingdom Hybrid / WFH Options
Comoro
Principal Sales Engineer Location: Remote (UK-based) – with travel to customer sites Salary: circa £140k +20% bonus + car allowance + extensive benefits package (DV cleared) Clearance Requirement: DV (Developed Vetting) or SC if willing to go through DV process Our client is at the forefront of digital transformation, supporting the world’s most essential organisations through their … visibility and insight at an unparalleled scale they help clients solve problems faster, secure what matters, and drive continuous innovation across their digital ecosystems. We are now seeking a Principal Sales Engineer to support the growth of UK public sector accounts. This is a remote, client-facing role for a highly technical and experienced presales professional with a … with tools like Wireshark, Zeek, or similar platforms. Awareness of cybersecurity frameworks and best practices (e.g., NIST, ISO 27001) and how they apply to network assurance. Role & Responsibilities As Principal Sales Engineer, you will play a vital role in driving revenue by delivering technical presales support, demonstrating product value, and shaping best-fit solutions. Reporting to the Regional More ❯
Employment Type: Permanent
Salary: £130000 - £140000/annum 20% Bonus and Benefits
Principal JavaScript Engineer (TypeScript/React/Node.js) £150,000–£170,000 + Equity | Hybrid – 3 days in London We’re helping a VC-backed SaaS scaleup reinvent how organisations manage and approve spend, from software requests to supplier onboarding, and they’re gearing up for serious growth. With enterprise clients already on board and revenue climbing, they … re looking for an outstanding PrincipalEngineer to drive their platform forward. The company in a nutshell Funding : $25M Series A from top-tier investors Leadership : Founders with a track record of building one of Europe’s best-known B2B scale-ups Growth : Plans to 10× revenue and expand to 200+ enterprise customers within 3 years What’s More ❯