Principal Software Engineer – C++ and Rust -
is required by highly successful and fast growing technology 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 meaningful share of your time writing code, reviewing designs, and unblocking the team. It's a delivery role, not a strategy role. You'll shape how we build things and how the team grows around you.
Responsibilities
- Lead the delivery of complex software projects
- Work alongside other leads to set direction for the defence function
- Stay hands‑on: set technical direction, design software and write code, leaning in where needed
- Mentor engineers across experience levels
- Plan and estimate delivery, manage technical debt, and make pragmatic trade‑offs between speed, quality and long‑term maintainability
- Work directly with clients to shape requirements, manage expectations and build trust
- Run code and design reviews, set the bar for quality, and hold the team to it
- Embed strong testing practices in the team's workflow, from unit tests through to integration and acceptance testing
What makes a great candidate
- A track record of technically leading complex software deliveries
- Excellent programming skills in C++ or Rust
- Experience of modern end‑to‑end software engineering workflows, including requirements management, design, development, testing, deployment, and maintenance
- Experience integrating AI‑assisted tools into development workflows without compromising on quality, security or compliance
- Experience developing for Linux, ideally with exposure to industrial computing platforms, single‑board computers or real‑time environments
- A leader who enjoys delivery and makes the engineers around them better
- Comfortable operating in ambiguous environments and making decisions with incomplete information
- Excellent communicator, equally at home in a code review, a client meeting, or a one‑to‑one with a junior engineer
- Strong academic foundations, typically a first‑class degree in Computer Science, Engineering, Physics or Mathematics from a leading university
- Experience in defence or national security is a strong plus
Why join them
- Work alongside high‑calibre colleagues from organisations known for engineering excellence
- High‑impact work on complex problems with direct consequences for clients
- A flat structure and a small, growing team, where you'll help shape how we work
- Newcastle base with international exposure across our global office network
- 25 days’ holiday allowance plus bank holidays
- Matching pension contributions up to 6%
- Private health insurance through Bupa
- Discretionary bonus
Excellent training and career development opportunities exist for the right candidate.
Basic salary £90-130,000 + bonus + excellent benefits
#J-18808-Ljbffr”, “datePosted”: “2026-05-15”, “hiringOrganization”: { “@type”: “Organization”, “name”: “Tech4”, “sameAs”: “https://uk.whatjobs.com/pub_api__cpl__432632392__4861?utm_campaign=publisher&utm_medium=api&utm_source=4861&geoID=328” }, “jobLocation”: { “@type”: “Place”, “address”: { “@type”: “PostalAddress”, “addressLocality”: “Newcastle upon Tyne” } } }Principal Software Engineer – C++ and Rust –
is required by highly successful and fast growing technology 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 meaningful share of your time writing code, reviewing designs, and unblocking the team. It’s a delivery role, not a strategy role. You’ll shape how we build things and how the team grows around you.
Responsibilities
- Lead the delivery of complex software projects
- Work alongside other leads to set direction for the defence function
- Stay hands‑on: set technical direction, design software and write code, leaning in where needed
- Mentor engineers across experience levels
- Plan and estimate delivery, manage technical debt, and make pragmatic trade‑offs between speed, quality and long‑term maintainability
- Work directly with clients to shape requirements, manage expectations and build trust
- Run code and design reviews, set the bar for quality, and hold the team to it
- Embed strong testing practices in the team’s workflow, from unit tests through to integration and acceptance testing
What makes a great candidate
- A track record of technically leading complex software deliveries
- Excellent programming skills in C++ or Rust
- Experience of modern end‑to‑end software engineering workflows, including requirements management, design, development, testing, deployment, and maintenance
- Experience integrating AI‑assisted tools into development workflows without compromising on quality, security or compliance
- Experience developing for Linux, ideally with exposure to industrial computing platforms, single‑board computers or real‑time environments
- A leader who enjoys delivery and makes the engineers around them better
- Comfortable operating in ambiguous environments and making decisions with incomplete information
- Excellent communicator, equally at home in a code review, a client meeting, or a one‑to‑one with a junior engineer
- Strong academic foundations, typically a first‑class degree in Computer Science, Engineering, Physics or Mathematics from a leading university
- Experience in defence or national security is a strong plus
Why join them
- Work alongside high‑calibre colleagues from organisations known for engineering excellence
- High‑impact work on complex problems with direct consequences for clients
- A flat structure and a small, growing team, where you’ll help shape how we work
- Newcastle base with international exposure across our global office network
- 25 days’ holiday allowance plus bank holidays
- Matching pension contributions up to 6%
- Private health insurance through Bupa
- Discretionary bonus
Excellent training and career development opportunities exist for the right candidate.
Basic salary £90-130,000 + bonus + excellent benefits
#J-18808-Ljbffr…