Principal Backend Engineer - Java Location: London (Hybrid) | Type: Permanent The Role Capco is growing our Engineering team - and we're looking for experienced Principal Backend Engineers with strong Java skills and a passion for delivering innovative solutions in financial services. If you enjoy solving complex problems, working with cloud-native technologies, and collaborating in agile teams, we'd love to hear from you. As a Principal Backend Engineer at Capco, you'll contribute to high-impact, client-facing projects that shape the future of financial services. You'll work alongside...  more ->

Principal Network Architect (Consultant) As a Principal Network Architect , you will be a trusted advisor, technical authority, and strategic partner to our clients. You will lead the design of complex, secure, and scalable network architectures, translating business requirements into robust technical solutions. This role combines technical leadership, solution architecture, consultancy, and pre-sales engagement, requiring a strong ability to operate at both strategic and hands-on levels. You will work closely with customers, sales, delivery teams, engineering functions, and senior...  more ->

Principal DevOps Engineer (Azure) Remote - London Victoria (1 day/month) Salary Up to £80,000 We're hiring a Principal DevOps Engineer with strong Azure expertise to lead DevOps strategy and delivery in a modern cloud environment. This is a hands-on leadership role owning CI/CD pipelines, Azure infrastructure, and engineering best practices across a highly Azure-focused platform. Key experience: Azure (core requirement) Azure DevOps (ADO), CI/CD pipelines Infrastructure as Code (ARM, YAML) PowerShell Scripting 5+ years in DevOps/Cloud roles Tech environment: Azure App Services, VMs/Scale...  more ->

Principal Software Engineer - C++ and Rust - is required by highly successful and fast growingtechnology consultancy. They build data, AI and software solutions for clients in a broad range of industries, working on demanding problems in challenging environments. The role They are looking for a Principal Software Engineer to lead delivery on demanding software projects. This role is focused on C++ and Rust development. This is a hands-on role for an experienced engineer who wants to stay close to the code. You'll lead a team of 6 to 12 engineers, own delivery end to end, and spend a...  more ->

Principal Java Engineer (AWS/Microservices) Salary: Up to £100,000 + Bonus + Benefits Location: Coventry or Central London - Hybrid (2 days per week onsite) Working Hours: 40 hours per week - Full time Job Type: Permanent A globally established organisation is seeking an experienced Principal Java Engineer to shape the future of large-scale digital platforms used by millions of customers. This role will focus on driving engineering excellence, defining technical standards and leading the design of scalable, high-availability systems across a modern cloud-native environment. Responsibilities...  more ->

Principal Java Engineer (AWS/Microservices) Salary: Up to £100,000 + Bonus + Benefits Location: Coventry or Central London - Hybrid (2 days per week onsite) Working Hours: 40 hours per week - Full time Job Type: Permanent A globally established organisation is seeking an experienced Principal Java Engineer to shape the future of large-scale digital platforms used by millions of customers. This role will focus on driving engineering excellence, defining technical standards and leading the design of scalable, high-availability systems across a modern cloud-native environment. Responsibilities...  more ->

Principal Data Engineer Location: Remote Salary: Up to £95,000 Sponsorship: Not available VIQU have partnered with a nationally recognised organisation that has recently completed a full migration from on-premise infrastructure to Google Cloud Platform (GCP) and is now building a modern, domain-oriented Data Mesh. This is a critical leadership hire as they continue to scale their cloud data platform and embed engineering excellence across multiple product domains. This is not a step-up role. They will only consider candidates with proven Principal or Lead-level experience, including clear...  more ->

Principal .NET Engineer (Azure/Microservices) Salary: Up to £100,000 + Bonus + Benefits Location: Coventry or Central London - Hybrid (2 days per week onsite) Working Hours: 40 hours per week - Full time Job Type: Permanent A globally established organisation is seeking an experienced Principal .NET Engineer to shape the future of enterprise technology used by millions of customers. This role will focus on engineering leadership, modern architecture, cloud-native delivery and driving best practice across multiple teams within a high-scale digital environment. Responsibilities for the...  more ->

Principal Engineer - £650 outside IR35 - Hybrid (London office, twice a week) Please note: This is a contract role, and candidates must be able to commute to the London office twice per week. La Fosse has partnered with an established business to recruit a Contract Principal Engineer to join their team. This role is heavily focused on architectural system design, taking ownership of shaping scalable, integration led platforms across a complex technology landscape. You will play a key role in defining and driving technical strategy. Key Requirements Strong experience in TypeScript...  more ->

Principal .NET Engineer (Azure/Microservices) Salary: Up to £100,000 + Bonus + Benefits Location: Coventry or Central London - Hybrid (2 days per week onsite) Working Hours: 40 hours per week - Full time Job Type: Permanent A globally established organisation is seeking an experienced Principal .NET Engineer to shape the future of enterprise technology used by millions of customers. This role will focus on engineering leadership, modern architecture, cloud-native delivery and driving best practice across multiple teams within a high-scale digital environment. Responsibilities for the...  more ->

Principal Engineer: Up to £650PD: Outside IR35: Hybrid London: 3 months rolling A globally scaled technology business is seeking a Principal Engineer to define the next generation of its API platform. Operating at significant scale, this is a hands-on engagement with real influence over the architectural direction of a critical engineering pillar. Key responsibilities as a Principal Engineer: Defining and driving the architectural vision for a large-scale API ecosystem Designing cloud-native distributed systems at scale Building high-throughput event-driven services Leading on security,...  more ->

Principal Technologist - Contract We are seeking a hands-on Principal Technologist to support a major UK Government programme , focused on Legacy IT remediation and modernisation.This is a senior technical role where you'll be actively designing, prototyping, and delivering solutions -not just defining strategy. You'll work closely with engineering teams to rapidly test ideas, refine approaches, and implement practical improvements across complex systems. Key Experience Required Strong hands-on engineering/development background Proven experience building and prototyping technical solutions...  more ->

Principal Engineer l Architecture l Design l Coaching l Typescript l AWS l Kafka l GraphQL l Lambda l £550-£625 per day l Outside IR35 l twice a week in London l 3 months We're hiring a Principal Engineer to step into a critical gap on a large-scale platform rebuild, now moving into production and customer migration. You'll operate as a technical leader across multiple squads, shaping architecture, mentoring leads, and unblocking delivery. Essential Skills & Experience Proven Principal-level experience (80% Architecture/design - 20% Coding) Strong in AWS, TypeScript, event-driven systems...  more ->

Principal Cloud Engineer - Azure Manchester (Hybrid - 1 day per week on-site) Salary up to £78,000 + Bonus We are supporting a UK-based organisation undertaking a significant, multi-year technology transformation. As part of this, they are investing heavily in their cloud platform and are seeking a Principal Cloud Engineer to play a key role in shaping and delivering their Azure environment. This position is suited to a hands-on engineer who enjoys building and improving platforms, rather than operating purely at an architectural or strategic level. Role Overview: The successful candidate...  more ->

Principal Rail Strategy Consultant/Rail Planning Lead (Rail/Transportation Sector) Contract Length: Up to 6 months Location: London (Hybrid -approx. 50% attendance on average) IR35: Inside Security Clearance: BPSS Clearance Required Public Sector experience highly desirable Excellent Rates.Urgent 6 Month contract - Role hiring now!* This is.London. Hybrid based role with an excellent immediate start within a Public Sector organisation working on. Leading and delivering strategic rail planning studies (eg route studies, network strategies, systems planning). An exciting opportunity to join a...  more ->

Principal Mechanical Engineer - Electric Motor Design Location: Hethel Engineering Centre, Chapman Way, Hethel, Norfolk NR14 8FP (3 days a week onsite) Type: Permanent, Full-Time (8:30am - 5:00pm, Monday to Friday) Start Date: End May or early June About the Role Are you passionate about electric machine design and eager to lead the development of next-generation electric motors? Our client is seeking a Principal Mechanical Engineer to join our dynamic engineering team. You will be responsible for the mechanical design, thermal performance, and integration of electric motors within our...  more ->

Job Title : Principal Engineer - Product Safety Salary: Up to £68,500 (DOE) Location: Scotstoun or Filton, Wales or Radway Green, Cheshire. Hybrid min 2 days/week on site. We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this particular role Who we are: Join BAE Systems and you'll be part of something bigger. As a valued member of our global colleague network, you'll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You'll be trusted to play your part in delivering the advanced,...  more ->

Job Title : Principal Engineer - Product Safety Salary: Up to £68,500 (DOE) Location: Scotstoun or Filton, Wales or Radway Green, Cheshire. Hybrid min 2 days/week on site. We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this particular role Who we are: Join BAE Systems and you'll be part of something bigger. As a valued member of our global colleague network, you'll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You'll be trusted to play your part in delivering the advanced,...  more ->

Job Title : Principal Engineer - Product Safety Salary: Up to £68,500 (DOE) Location: Scotstoun or Filton, Wales or Radway Green, Cheshire. Hybrid min 2 days/week on site. We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this particular role Who we are: Join BAE Systems and you'll be part of something bigger. As a valued member of our global colleague network, you'll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You'll be trusted to play your part in delivering the advanced,...  more ->

Job Title : Principal Engineer - Product Safety Salary: Up to £68,500 (DOE) Location: Scotstoun or Filton, Wales or Radway Green, Cheshire. Hybrid min 2 days/week on site. We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this particular role Who we are: Join BAE Systems and you'll be part of something bigger. As a valued member of our global colleague network, you'll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You'll be trusted to play your part in delivering the advanced,...  more ->