City of London, London, United Kingdom Hybrid / WFH Options
Ozone Talent
PrincipalEngineer London Hybrid £100,000-£170,000 + bonus + benefits We’re working with a rapidly growing tech for good company that is transforming how data, automation, and smart integrations shape the future of digital infrastructure. Their platform optimises real-time operations, connecting users with seamless, intelligent technology solutions. We are looking for PrincipalEngineer … their high performance systems. This is an opportunity to work with modern backend architecture, collaborating with top-tier engineers in a fast-moving, product-focused environment. Responsibilities as a PrincipalEngineer: Contribute to the businesses technology strategy and architecture Contribute to the backend Kotlin infrastructure Ship resilient and well tested production code Collaborate with different teams to deliver … and bonus Hybrid office/remote-working practices Private Health Insurance Pension Scheme Life Assurance Scheme with death in service benefit of 4x salary This is a career defining PrincipalEngineer position with the potential to have a massive impact on the technology strategy of a business that is directly shaping the future of intelligent digital infrastructure. **Unfortunately More ❯
london (city of london), south east england, united kingdom Hybrid / WFH Options
Ozone Talent
PrincipalEngineer London Hybrid £100,000-£170,000 + bonus + benefits We’re working with a rapidly growing tech for good company that is transforming how data, automation, and smart integrations shape the future of digital infrastructure. Their platform optimises real-time operations, connecting users with seamless, intelligent technology solutions. We are looking for PrincipalEngineer … their high performance systems. This is an opportunity to work with modern backend architecture, collaborating with top-tier engineers in a fast-moving, product-focused environment. Responsibilities as a PrincipalEngineer: Contribute to the businesses technology strategy and architecture Contribute to the backend Kotlin infrastructure Ship resilient and well tested production code Collaborate with different teams to deliver … and bonus Hybrid office/remote-working practices Private Health Insurance Pension Scheme Life Assurance Scheme with death in service benefit of 4x salary This is a career defining PrincipalEngineer position with the potential to have a massive impact on the technology strategy of a business that is directly shaping the future of intelligent digital infrastructure. **Unfortunately More ❯
Position : Staff/PrincipalEngineer Location : London My client are seeking for an accomplished Staff Engineer to help shape the future of our data and backend platforms. This is a senior technical leadership role for someone who is currently operating at a Staff or PrincipalEngineer level and ready to have a company wide impact. … business strategy Anticipate industry trends, evaluate new technologies, and guide adoption of solutions that keep us ahead of the curve What we’re looking for Experience operating at Staff Engineer or PrincipalEngineer level for atleast 2 years Expertise in streaming platforms such as Flink, Kafka, and Spark, with experience designing large-scale event driven architectures Strong More ❯
london (city of london), south east england, united kingdom
Signify Technology
Position : Staff/PrincipalEngineer Location : London My client are seeking for an accomplished Staff Engineer to help shape the future of our data and backend platforms. This is a senior technical leadership role for someone who is currently operating at a Staff or PrincipalEngineer level and ready to have a company wide impact. … business strategy Anticipate industry trends, evaluate new technologies, and guide adoption of solutions that keep us ahead of the curve What we’re looking for Experience operating at Staff Engineer or PrincipalEngineer level for atleast 2 years Expertise in streaming platforms such as Flink, Kafka, and Spark, with experience designing large-scale event driven architectures Strong More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Wave Talent
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 ❯
london (city of london), south east england, united kingdom Hybrid / WFH Options
Wave Talent
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 ❯
Principal Software Engineer (Golang | Distributed Systems) London – On-site Up to £170,000 base + 25% bonus + excellent benefits Permanent I’m partnered with a high-growth technology company building a world-class data and services platform that processes tens of billions of monthly requests — powering real-time insights for millions of users globally. They’re hiring … a Principal Software Engineer (Golang) to join their London engineering team as a hands-on technical leader — driving architectural direction, mentoring engineers, and solving complex distributed systems challenges at scale. The Opportunity Architect and scale high-throughput, event-driven systems built in Go Lead the evolution of real-time APIs and data platforms handling billions of requests Stay … across all services Mentor senior engineers and play a key role in shaping engineering culture What They’re Looking For 8+ years’ backend engineering experience, ideally at Staff/Principal/Tech Lead level Expert-level proficiency with Golang in production Proven track record designing distributed systems and event-driven architectures (Kafka, RabbitMQ, WebSockets) Deep understanding of PostgreSQL , Redis More ❯
london (city of london), south east england, united kingdom
Orbis Group
Principal Software Engineer (Golang | Distributed Systems) London – On-site Up to £170,000 base + 25% bonus + excellent benefits Permanent I’m partnered with a high-growth technology company building a world-class data and services platform that processes tens of billions of monthly requests — powering real-time insights for millions of users globally. They’re hiring … a Principal Software Engineer (Golang) to join their London engineering team as a hands-on technical leader — driving architectural direction, mentoring engineers, and solving complex distributed systems challenges at scale. The Opportunity Architect and scale high-throughput, event-driven systems built in Go Lead the evolution of real-time APIs and data platforms handling billions of requests Stay … across all services Mentor senior engineers and play a key role in shaping engineering culture What They’re Looking For 8+ years’ backend engineering experience, ideally at Staff/Principal/Tech Lead level Expert-level proficiency with Golang in production Proven track record designing distributed systems and event-driven architectures (Kafka, RabbitMQ, WebSockets) Deep understanding of PostgreSQL , Redis More ❯
City of London, London, England, United Kingdom Hybrid / WFH Options
Ada Meher
Principal Data Engineer – Winchester/London (Hybrid) - £84,000 + 10% bonus 1-2dpw in office | Greenfield Enterprise Data Platform Build | Flexible Working | Private Medical Ada Meher are working with the market leader in Digital Telecommunication & Broadcasting technology solutions as they recruit for a Principal Data Engineer to join them on their migration project from … business also has an extremely competitive benefits package including, but not limited to, Private Medical, enhanced pension contributions & wellness/gymflex programmes.We are expecting a strong response to this Principal Data Engineer role, so please apply send a CV in to today to avoid missing out More ❯
Principal Python Engineer Salary: Up to £130k + bonus Location: London (3x per week) I’m working with a global financial organisation that’s investing heavily in its data and cloud technology platform, and they’re looking for a Python Engineer to join their growing Investment Technology team. You’ll be: Building clean, scalable Python back-end … data engineering experience Solid understanding of APIs, SQL/NoSQL, and modern software design A problem-solver who enjoys working closely with the business If you’re a Python engineer who loves solving complex data challenges in a collaborative, cloud-first environment — drop me a message: daniel.wexler@sourcegroupinternational.com THIS ROLE DOES NOT PROVIDE SPONSORSHIP More ❯
london (city of london), south east england, united kingdom
SGI
Principal Python Engineer Salary: Up to £130k + bonus Location: London (3x per week) I’m working with a global financial organisation that’s investing heavily in its data and cloud technology platform, and they’re looking for a Python Engineer to join their growing Investment Technology team. You’ll be: Building clean, scalable Python back-end … data engineering experience Solid understanding of APIs, SQL/NoSQL, and modern software design A problem-solver who enjoys working closely with the business If you’re a Python engineer who loves solving complex data challenges in a collaborative, cloud-first environment — drop me a message: daniel.wexler@sourcegroupinternational.com THIS ROLE DOES NOT PROVIDE SPONSORSHIP More ❯
Contributor) to solve some of their most complex problems. This is an opportunity to be a top technical voice, influence the system, and mentor a talented team. As a PrincipalEngineer , you will be a hands-on problem solver and a technical leader, influencing the team through expertise and example rather than line management. What You'll Do … approaches and accelerate their learning. Lead by Example: Run training sessions and facilitate discussions to elevate the entire engineering team. Who We're Looking For You are a seasoned engineer with 10-15 years of experience, a track record of building maintainable, scalable services and systems, and an upward trajectory in your career. You are a fantastic IC who More ❯
london (city of london), south east england, united kingdom
numi
Contributor) to solve some of their most complex problems. This is an opportunity to be a top technical voice, influence the system, and mentor a talented team. As a PrincipalEngineer , you will be a hands-on problem solver and a technical leader, influencing the team through expertise and example rather than line management. What You'll Do … approaches and accelerate their learning. Lead by Example: Run training sessions and facilitate discussions to elevate the entire engineering team. Who We're Looking For You are a seasoned engineer with 10-15 years of experience, a track record of building maintainable, scalable services and systems, and an upward trajectory in your career. You are a fantastic IC who More ❯
SR2 | Socially Responsible Recruitment | Certified B Corporation™
SR2 are currently looking for a Principal Software Engineer (Python/React) for a fast-growing start-up company in London. Location: Central London (2-3 days a week onsite). Salary: £100 - 120k. What we are looking for: Key skills: Python, React, TypeScript & AWS. Proven track record in a client-facing technical role, dealing with internal & external More ❯
london (city of london), south east england, united kingdom
SR2 | Socially Responsible Recruitment | Certified B Corporation™
SR2 are currently looking for a Principal Software Engineer (Python/React) for a fast-growing start-up company in London. Location: Central London (2-3 days a week onsite). Salary: £100 - 120k. What we are looking for: Key skills: Python, React, TypeScript & AWS. Proven track record in a client-facing technical role, dealing with internal & external More ❯
As a Principal/Lead Full-Stack Engineer, you'll thrive if you're hands-on, grounded, and passionate about building with technology. This role is ideal for those looking to have a large impact and huge scope for growth, while still being hands on with technology. We aim to allow growth without becoming “post-technical” . Our … and decision-making Provide hands-on mentorship and technical guidance that encourages knowledge sharing, continuous improvement, and innovation within your team Skills you’ll need: Demonstrated experience as a Principal or Lead Software Engineer Experience in leading architecture and design decisions, ensuring adherence to best practices in technology choices and system design Deep understanding of programming fundamentals and More ❯
london (city of london), south east england, united kingdom
Sahaj Software
As a Principal/Lead Full-Stack Engineer, you'll thrive if you're hands-on, grounded, and passionate about building with technology. This role is ideal for those looking to have a large impact and huge scope for growth, while still being hands on with technology. We aim to allow growth without becoming “post-technical” . Our … and decision-making Provide hands-on mentorship and technical guidance that encourages knowledge sharing, continuous improvement, and innovation within your team Skills you’ll need: Demonstrated experience as a Principal or Lead Software Engineer Experience in leading architecture and design decisions, ensuring adherence to best practices in technology choices and system design Deep understanding of programming fundamentals and More ❯
stage B2B SaaS company that’s building something genuinely transformative in their category. As they enter a critical phase of growth, they’re looking to hire a Senior or Principal Full-Stack Software Engineer to help lay the technical foundations of their platform and influence both the engineering direction and long-term product strategy. This is a high … isn’t available. The team is passionate about diversity, inclusion, and building an environment where everyone can thrive and do their best work. If you're a hands on engineer excited by the idea of helping build a product from the ground up and want to join a team that values innovation, ownership, and velocity we would love to More ❯
london (city of london), south east england, united kingdom
Alderson James
stage B2B SaaS company that’s building something genuinely transformative in their category. As they enter a critical phase of growth, they’re looking to hire a Senior or Principal Full-Stack Software Engineer to help lay the technical foundations of their platform and influence both the engineering direction and long-term product strategy. This is a high … isn’t available. The team is passionate about diversity, inclusion, and building an environment where everyone can thrive and do their best work. If you're a hands on engineer excited by the idea of helping build a product from the ground up and want to join a team that values innovation, ownership, and velocity we would love to More ❯