Spacecraft Software Engineer Jobs UK 2026: From Glasgow to Cornwall

The Short Answer

Spacecraft software engineer jobs in the UK are flight software roles — writing, verifying and qualifying the on-board code that runs on satellites, launch vehicles and crewed-adjacent systems — and in 2026 they are concentrated across a surprisingly compact geography running from Glasgow's small-satellite cluster through Harwell, Guildford and Stevenage down to Cornwall and up to Shetland. Typical UK employers include Airbus Defence and Space UK (Stevenage and Portsmouth), Surrey Satellite Technology Ltd (Guildford), Skyrora and AAC Clyde Space in Glasgow, Orbex in Forres, Astroscale UK and Open Cosmos at Harwell, with Thales Alenia Space UK, MDA Space UK and Lockheed Martin Space UK adding scale. We are seeing junior flight software engineers at £35,000–£50,000, mid-level at £55,000–£85,000, senior at £85,000–£120,000 and lead or principal roles at £120,000–£170,000, with contract day rates between £600 and £1,000 and a meaningful premium for UK-eyes-only cleared defence space programmes. The dominant regulators are the UK Space Agency (UKSA) and the Civil Aviation Authority's Space Regulation team, with most flight software written to European Cooperation for Space Standardization (ECSS) standards.

What Does a Spacecraft Software Engineer Actually Do?

A spacecraft software engineer writes the software that runs on the spacecraft itself — the flight software — as distinct from the ground software that controls and monitors it from Earth. In practice that means embedded code running on a radiation-tolerant flight computer under a real-time operating system, controlling attitude and orbit, executing telecommands from the ground, generating telemetry, handling payload operations and recovering safely from on-board faults.

The day-to-day work covers attitude and orbit control system (AOCS) algorithms, fault detection isolation and recovery (FDIR), telecommand and telemetry handling against CCSDS Space Packet Protocol, on-board data handling, payload software, and the verification and validation evidence needed to qualify code for flight. Most UK flight software is written in C or C++, with Ada still present on legacy safety-critical platforms and Rust appearing in newer experimental builds. Real-time operating systems in active use across UK programmes include RTEMS, FreeRTOS and VxWorks, with bus protocols dominated by SpaceWire, MIL-STD-1553 and CAN.

The discipline is recognisably software engineering, but the quality bar is set by ECSS — particularly ECSS-E-ST-40C (software engineering) and ECSS-Q-ST-80C (software product assurance). That difference matters considerably more than the language choice on a CV: an engineer who has shipped flight software through formal ECSS reviews is a meaningfully scarcer hire than one who has written embedded C on terrestrial systems.

Why Does the UK Run From Glasgow to Cornwall?

The UK's space industry is geographically distributed in a way that surprises candidates coming from countries with a single dominant space hub. Glasgow alone builds more small satellites than any other city outside the United States, hosting Spire Global, AAC Clyde Space, Alba Orbital and a deep supply chain across the West of Scotland. Edinburgh adds Skyrora's launch vehicle engineering. Move south and the cluster reappears at Harwell in Oxfordshire — home to the Harwell Space Cluster, the European Space Agency's ECSAT site, Astroscale UK, Open Cosmos and a growing population of in-orbit servicing and Earth observation companies.

Stevenage is Airbus Defence and Space UK's main satellite integration site and the largest single concentration of UK space engineering. Guildford houses Surrey Satellite Technology Ltd (SSTL) and KISPE Space, both with long heritage in small-satellite platforms. Portsmouth carries Airbus payload and communications work. Forres in the Highlands is home to Orbex's launch vehicle programme.

The launch end of the geography is genuinely new. Spaceport Cornwall at Newquay is the UK's horizontal launch site, hosting Virgin Orbit's 2023 attempt and now repositioning around horizontal launch services and microgravity work. SaxaVord Spaceport on Unst, Shetland, is the UK's first vertical launch site — licensed by the CAA, with Rocket Factory Augsburg (RFA) holding the operational launch complex and a first orbital attempt now pencilled for a window opening no earlier than July 2026. The practical implication for candidates is that "UK spacecraft software" no longer means relocating to Stevenage by default.

Which UK Employers Hire Spacecraft Software Engineers?

The UK flight software market is dominated by a tier of established primes and platform houses, with a growing second tier of new-space scale-ups and a tail of specialists. On the prime side, Airbus Defence and Space UK is by some distance the largest employer of spacecraft software engineers, with Stevenage running platform and payload software for telecommunications, Earth observation and science missions, and Portsmouth handling payload and ground segment work. Surrey Satellite Technology Ltd (SSTL) in Guildford remains the deepest UK small-satellite platform house, with consistent flight software demand across platform, AOCS and payload teams. Thales Alenia Space UK, MDA Space UK and Lockheed Martin Space UK round out the prime-tier hiring.

The Glasgow cluster is now a serious employer of spacecraft software engineers in its own right. Spire Global operates one of the largest commercial satellite constellations from a Glasgow engineering base. AAC Clyde Space builds platform avionics and flight software for small satellites. Alba Orbital focuses on PocketQube-class spacecraft. Skyrora (Glasgow and Edinburgh) and Orbex (Forres) both hire launch vehicle software engineers — a recognisably different specialism from satellite flight software, with harder real-time constraints and more involvement in guidance, navigation and control.

At Harwell, Astroscale UK's in-orbit servicing and debris-removal work has driven a steady demand for flight software engineers comfortable with rendezvous, proximity operations and capture sequences. Open Cosmos builds turnkey small-satellite missions. In-Space Missions (Alton) and D-Orbit UK add capacity. Reaction Engines (Oxford) and Magdrive (Oxford) sit slightly to one side — propulsion-led — but hire embedded software talent on similar terms. We would caution against treating any of these as interchangeable: the engineering culture between an Airbus ECSS-led programme and an Alba Orbital PocketQube build is meaningfully different, and candidates often self-select harder than the JD suggests.

How Much Do Spacecraft Software Engineer Jobs Pay in 2026?

Pay in UK spacecraft software has lifted noticeably over the past three years, driven by Glasgow's constellation hiring, Harwell's in-orbit servicing build-out and the contract market around launch vehicle software. In our reading of UK postings in the first half of 2026, indicative permanent ranges look like this:

Glasgow and Harwell pay slightly below Stevenage and London for permanent roles, with the gap closing for senior and lead positions where the underlying scarcity is the specialism. Cleared roles — typically Security Check (SC) or Developed Vetting (DV) on UK defence space programmes such as the UK MILSATCOM successor work — carry a 10–25% premium over commercial equivalents, with the largest gap at mid-to-senior level where active clearance is hardest to find. Contract day rates for AOCS, FDIR and launch vehicle GNC specialists routinely sit at the top of the published range, and we have seen specific niche specialists negotiate well above £1,000 a day inside IR35.

As ever with hedged UK salary data, we would caution treating these numbers as a rate card. A flight software engineer who has personally written FDIR for a flown platform is a different hire from one who has reviewed someone else's, and the offer reflects that.

Spacecraft Software vs Ground Software vs Mission Operations: What's the Difference?

Three adjacent roles get confused on UK job boards, and the distinction matters at interview. Spacecraft software engineers write the flight software that runs on the spacecraft. Ground software engineers write the control-segment software that runs on Earth — mission control systems, telemetry processing, command stacking, planning and scheduling, often built on frameworks such as OpenC3 COSMOS, ESA's EGS-CC or in-house mission control systems. Mission operations engineers operate the live spacecraft using that ground software, often as part of a shift-rota team during commissioning and routine operations.

The three roles are complementary rather than competitive, and senior engineers commonly cross between them. We would suggest that candidates with strong embedded and real-time backgrounds default to flight software, while those with stronger distributed-systems or data-engineering backgrounds will find ground software a better fit. Mission operations rewards systems thinking and a tolerance for shift work during launch and early operations.

What Tools and Standards Should You Know?

The honest answer is that the standards matter more than the tools. ECSS — the European Cooperation for Space Standardization — provides the framework most UK flight software is written against, with ECSS-E-ST-40C governing software engineering processes and ECSS-Q-ST-80C governing software product assurance. On top of that, the CCSDS Space Packet Protocol and Packet Utilisation Standard (PUS) govern the telecommand and telemetry interfaces. For UK defence space work, NATO STANAGs and Defence Standard 00-055/00-056 add further constraints, alongside MoD-specific assurance requirements.

On the tools side, expect to encounter model-based systems engineering with Capella (and increasingly Cameo Systems Modeler), code generation from Simulink for AOCS algorithms, static analysis with tools such as Polyspace and LDRA, and configuration management through Git with project-specific gating. The MOOSE flight software framework appears in some UK programmes, alongside ESA's open-source NanoSat MO Framework for CubeSat-class missions. Ground-side tooling is dominated by OpenC3 COSMOS, Yamcs, EGS-CC and SatNOGS for amateur and small-mission ground stations.

For algorithms, the AOCS bench tests UK candidates on are recognisable: Kalman filters and their extended and unscented variants, quaternion-based attitude representations, reaction wheel desaturation, magnetorquer control and star tracker integration. Launch vehicle software engineers should expect questions on guidance, navigation and control, real-time scheduling, vehicle staging logic and abort modes. We would advise candidates to be honest about which of these they have shipped versus only studied — UK space engineering teams are small enough that overclaiming gets caught at reference stage.

Do You Need Security Clearance for UK Spacecraft Software?

It depends on the programme. A substantial share of UK commercial flight software work — Earth observation constellations, in-orbit servicing, scientific missions, commercial telecommunications — does not require formal HM Government clearance, although some employers still ask for Baseline Personnel Security Standard (BPSS) checks. Where clearance bites is on UK defence and intelligence space programmes: secure satellite communications, ISR payloads, MoD Space Command work, and the sovereign UK SATCOM successor activity. Those typically require SC at minimum and DV for the most sensitive roles.

Clearance is sponsored by an employer through United Kingdom Security Vetting (UKSV); candidates cannot self-apply. SC processing in 2026 is typically taking 6–12 weeks, with DV considerably longer. The visible effect on UK spacecraft software hiring is a noticeable premium for engineers who already hold active SC or DV through a sponsor — Airbus Defence and Space UK, Lockheed Martin Space UK, Thales UK and a small group of defence space SMEs being the most consistent SC/DV sponsors in the spacecraft software space.

Eligibility generally requires sole or dual British nationality for SC, with five years of UK residency, and stricter residency and nationality requirements for DV. Some defence space programmes carry a UK-eyes-only restriction that effectively requires sole British nationality. We would caution candidates outside that profile against relying on cleared work as a career path, and would point instead at the commercial constellation, launch and in-orbit servicing employers where eligibility is less constrained.

How Is SaxaVord and UK Launch Changing the Hiring Picture?

SaxaVord Spaceport on Unst was granted its CAA spaceport licence in 2023 and is preparing for the UK's first vertical orbital launch attempt — Rocket Factory Augsburg's RFA One, with the launch window now opening no earlier than July 2026 after a delay announced in late 2025. Spaceport Cornwall continues as the UK's horizontal launch site, with operations now broader than the original Virgin Orbit programme. The CAA's Space Regulation team licenses both spaceports and individual launches, working alongside the UK Space Agency on national policy.

For spacecraft software hiring, the operational implications are still developing, but the direction is clear. Skyrora (Glasgow/Edinburgh) and Orbex (Forres) are both closer to first orbital launches than they were a year ago, and both are visibly hiring launch vehicle software engineers — guidance, navigation and control, real-time avionics, ground support software and range safety. SaxaVord itself is hiring range and mission management software roles, with a small but growing engineering footprint on Unst and in the wider Shetland base. We would not yet advise candidates to relocate to Shetland on the assumption of a deep local jobs market — the engineering pipeline is still primarily Glasgow, Edinburgh and Forres — but the trajectory has clearly changed.

The wider 2026 context is the UK National Space Strategy continuing to back domestic launch and sovereign capability, ESA UK contribution remaining stable, and Lightcast data showing UK job ads mentioning "satellite", "spacecraft", "payload integration" or "space systems" up around a third year-on-year in early 2025. Demand signals into late 2026 look firm rather than spectacular, with the most consistent hiring in flight software, AOCS, FDIR, ground software and mission operations.

Frequently Asked Questions: Spacecraft Software Engineer Jobs UK

Do I need a space engineering degree to become a spacecraft software engineer?

No. A substantial proportion of UK flight software engineers come from electronic engineering, computer science, physics or mathematics backgrounds, with space-specific knowledge picked up on the job or through a postgraduate route such as Cranfield, Surrey or Strathclyde. What employers actually filter on is embedded software experience, comfort with real-time constraints and a credible answer on quality and verification. A space MSc helps at graduate level but matters less for mid-career switchers.

Can I move into UK spacecraft software from automotive or aerospace embedded work?

Yes, and it is one of the most common entry routes in 2026. Automotive engineers from ISO 26262 environments transfer naturally into ECSS quality regimes, and avionics engineers from DO-178C aircraft work move across with relatively little friction. Expect to learn CCSDS, ECSS-E-ST-40C and the specific patterns of FDIR and AOCS, but the underlying embedded and real-time skills carry directly. We would suggest targeting Airbus, SSTL or the Glasgow constellation employers as the friendliest landing pads.

Is Glasgow really a serious UK space hiring market?

Yes. Glasgow now builds more small satellites annually than any city outside the United States, with Spire Global, AAC Clyde Space, Alba Orbital and a broader West of Scotland supply chain hiring consistently. Skyrora's launch vehicle work is split between Glasgow and Edinburgh. The cost of living is meaningfully lower than London or Stevenage for equivalent roles, and the engineering community is concentrated enough that movement between employers is relatively easy.

What is the difference between flight software and embedded software?

Flight software is a sub-discipline of embedded software with a much stricter quality and verification regime, a tighter real-time and resource budget, and an inability to ship a patch easily after launch. The languages and operating systems overlap considerably with terrestrial embedded work, but the development lifecycle is built around formal ECSS or DO-178C-style processes, extensive software-in-the-loop and hardware-in-the-loop testing, and a long verification and validation campaign before flight.

How long does it take to qualify a piece of UK flight software for launch?

It varies considerably by mission class, but a CubeSat-class mission might complete software qualification in 12–18 months, a commercial small-satellite platform in 18–30 months, and a flagship ESA or defence space programme in three to five years from concept to launch. Most of that time is not coding — it is requirements decomposition, verification, formal reviews and integration with hardware. Candidates often underestimate how much of the work is review-driven.

Are spacecraft software contract day rates worth the move from permanent?

For mid-to-senior specialists with shipped flight software heritage, frequently yes. UK day rates in 2026 sit at £600–£1,000 for permanent-equivalent specialisms, with AOCS, FDIR and launch vehicle GNC reaching the top of that range. The trade-off is the usual contractor exposure to IR35 status, gap risk between programmes and limited training investment from the engaging employer. Cleared contract rates run higher again. We would caution junior engineers against jumping early — flight software heritage is built slowly and is hard to acquire as a contractor.

Which regulators and bodies should I actually know?

For UK space careers, the UK Space Agency (UKSA) is the lead policy and funding body, the Civil Aviation Authority's Space Regulation team licenses spaceports and individual launches, and MoD Space Command leads defence space activity. The European Space Agency remains a major source of UK programme funding through the UK's ESA contribution. On standards, ECSS is the framework most UK flight software is written against; for cleared defence work, the relevant NATO STANAGs and UK Defence Standards layer on top.

How do I find spacecraft software roles that are not on LinkedIn?

Specialist routes work better than generalist boards for this market. The UK Space Agency and UKspace trade association both publish careers content; the Harwell Space Cluster and Glasgow's space community run periodic events worth attending; and the major primes (Airbus, SSTL, Thales Alenia Space UK, Lockheed Martin Space UK) post directly through their own careers sites. Specialist job boards aggregating UK spacecraft software roles tend to surface scale-up and SME openings that never reach the major aggregators.

Summary: Is a Spacecraft Software Engineer Career Right for You?

UK spacecraft software in 2026 is a small, technically demanding and geographically distributed market that rewards engineers willing to invest in ECSS-grade quality practice, real-time embedded discipline and a working knowledge of AOCS, FDIR and CCSDS protocols. If you enjoy embedded systems work, are comfortable with formal verification and can accept that your code will fly somewhere you cannot reach with a patch, the discipline pays well and offers genuinely interesting work across Glasgow, Harwell, Guildford, Stevenage, Forres, Cornwall and now Shetland. If you would rather move faster, ship more often and accept lower assurance burdens, ground software or commercial constellation back-end work may be a better fit. Either way, the UK space sector's hiring direction in 2026 is up, and the entry points are wider than they have been in a decade.

Looking for your next spacecraft software engineer role? Browse the latest UK space jobs at ukspacejobs.co.uk — the UK's specialist job board for spacecraft, satellite, launch and mission operations professionals.