Principal Software Engineer jobs in Berkshire

Principal Software Engineer .NET £90,000-£110,000 Remote (UK) Do you thrive on building scalable solutions that power commerce worldwide? We're partnering with a rapidly expanding global payment platform fresh off a transformative acquisition. They're engineering a robust, merchant-centric ecosystem built on quality, resilience, and scale - and they need exceptional .NET Software Engineers to...

Principal Software Engineer Fully Remote | Permanent | £85,000 - £115,000 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 hands-on development with strategic influence, guiding architecture decisions and shaping the...

I’m supporting an early-stage AI startup building genuinely transformational tooling for some of the most document-heavy industries out there. They’re now looking for a Staff or Principal Software Engineer who wants to design and ship AI-driven product capabilities end-to-end, from the first customer conversation all the way to production rollout and adoption. What you’ll be doing - Owning...

You will help them stay ahead of the curve by solving both technical and sociotechnical problems. You would be joining a squad of Principal engineers with different expertise that serves as a centre of excellence to the 16+ engineering teams in the wider engineering function.

Senior Backend Engineer | London | £100,000 - £160,000 | Python | FastAPI | Systems Location: London based - hybrid Salary: £100,000 - £160,000 + equity Tech Stack: - Backend: Python (FastAPI) - Cursor, Claude Code - AWS Are you a backend engineer who cares more about building robust systems than chasing AI hype? We are working with a recently funded Series A technology company building AI...

Principal Engineer (Education) Competitive + Bonus + Benefits UK, Remote Permanent full time Summary The Principal Software Engineer role is a key role in the IRIS Engineering Organization and is one of the keystones in the delivery of World-Class Customer Products, Developer experience and the advancement of our technology xujxxms in .NET and C#. As a Principal Software Engineer, your...

🏗️ Principal Engineer - Industrial Buildings | London | Shape the Future Are you ready to lead the charge on ground breaking projects? We are seeking a Principal Engineer to grow our team to help deliver our pipeline of projects for 2026 and beyond. At Rendel, part of the global Ingérop Group, we’ve been delivering innovative engineering solutions for over 180 years. With offices across the UK...

You will design, implement, and test robust flight software on RTOS or Embedded Linux platforms, taking systems from simulation through launch and on-orbit operations within a fast-paced, mission-driven environment. Key Responsibilities

You will take individual responsibility for a range of project types, manage them independently and be the clients main point of contact.

You will lead independently and proactively on technical aspects including preparing designs, specification, technical approval submissions, site supervision and will be fully conversant with industry design standards.

Job Description Modeling Engineer – DSP / Software – Semiconductors – Berkshire – Hybrid – Generous salary. A Modeling Engineer with good knowledge of control theory and digital algorithms together with proficiency in C++, Matlab or Python/NumPy programming languages will join a thriving Semiconductor Company, contributing to their system-level modelling of serial communication links. With a...

Principal ILS & Obsolescence Engineer Introduction: This organisation sits at the heart of some of the UK’s most critical defence and maritime programmes, delivering technology that genuinely matters. They’re now strengthening their Integrated Logistics Support capability with a senior engineer who can shape strategy, guide teams, and influence delivery across complex systems. Role...

You will support in reverse engineering and deep understanding of vulnerabilities, including impact analysis and automation.

You must relish the challenge of findings critical vulnerabilities in complex software binaries through automation and manual practices. Creativity is highly valued; being able to find novel vulnerabilities is essential in this role.

You will have a good technical knowledge in the primary discipline of fire safety design.

You will be IT literate with a working understanding of fire modelling software analysis tools.

You should have excellent communication skills and an interest in working in a team environment.

You will be a vital part of this evolution, contributing your expertise to our strategy and helping us redefine what services we offer our clients.

You will ensure buildings are designed to minimise fire risks, through contributing to the development of fire strategy reports, calculations and fire risk assessments.

You will work in close collaboration with a highly-functioning team of software, electronics, algorithm engineers and product managers.

Principal EC&I Engineer Apply (by clicking the relevant button) after checking through all the related job information below. Reading - Hybrid - 3 days a week in office £50-55 per hour Outside of IR35 Are you an EC&I Engineer who has at least 10+ years experience designing within an building services industry? If so, please read on... Essential Requirements: - 10-15+ years' experience working...

DV Cleared Senior Software Engineer Do you have the skills to fill this role Read the complete details below, and make your application today. Aldermaston - Onsite 12-month contract | Outside IR35 Are you a DV cleared Software Engineer who can take full ownership of software delivery on site? Do you enjoy building Siemens PLC solutions from scratch in secure, regulated environments?...

Principal Software Engineer .NET £90,000-£110,000 Remote (UK) Do you thrive on building scalable solutions that power commerce worldwide? We're partnering with a rapidly expanding global payment platform fresh off a transformative acquisition. They're engineering a robust, merchant-centric ecosystem built on quality, resilience, and scale - and they need exceptional .NET Software Engineers to...

You will work within a multidisciplinary team of engineers and support staff delivering a consistent high‐quality service for clients, ensuring that repeat and new business opportunities are developed and profitability is achieved. In this key and varied role, you can expect to:

Principal Software Engineer Fully Remote | Permanent | £85,000 - £115,000 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 hands-on development with strategic influence, guiding architecture decisions and shaping the...