IR35.org

Safety-critical systems contracts

11 open Safety-critical systems contracts, typically £385–£635 a day.

Open contracts
11
Typical day rate
£385–£635Median £475, from 9 contracts stating a rate
Outside IR35
14%of the 7 that state a status

At the median £475 a day over 220 working days, you'd take home about £67,335 a year outside IR35, or £63,336 inside IR35. Work out your own take-home pay

Skip to results

11 contracts found

  1. Manufacturing TechnicianOn site

    Sovereign defence manufacturing

    £203–£223/day£27–£30/hrInside IR35

    Henlow · 12 months · SC clearance · Posted 68 days ago

    • Safety-critical systems
  2. Senior Systems EngineerHybrid

    Complex software-enabled systems development

    £375–£506/day£50–£67/hrInside IR35

    New Malden · 12 months · Posted 25 days ago

    • Safety-critical systems
    • Systems engineering
    • Requirements gathering
    • Performance testing

    2 adverts

  3. Autonomy Solution ArchitectHybrid

    Defence and security sector company

    £750–£825/day£100–£110/hrOutside IR35

    Fareham · Posted 14 days ago

    • Safety-critical systems
    • Solution architecture
    • Systems engineering
    • Cyber security
    • C++
  4. Rolling Stock Project Engineer

    Rail fleet heavy overhaul team

    £450–£500/dayIR35 not stated

    London · 6 months · Posted 12 days ago

    • Safety-critical systems
    • Risk management
    • Stakeholder management
    • Technical writing
    • Planning and scheduling (Primavera P6 / MS Project)
    • +1 more
  5. Software Engineer - Autonomous SystemsHybrid

    Specialist engineering team developing autonomous systems

    Rate not statedIR35 not stated

    Oxford · Posted 10 days ago

    • Safety-critical systems
    • Embedded systems
  6. Senior Nuclear Safety Engineer

    UK defence and nuclear programmes

    £600–£668/day£80–£89/hrIR35 not stated

    Glasgow · 6 months · Posted 6 days ago

    • Safety-critical systems
    • Stakeholder management
  7. Systems Engineer - EMC/TEMPESTOn site

    Defence and Aerospace company

    £525/day£70/hrInside IR35

    Portsmouth · 6 months · DV clearance · Posted 6 days ago

    • Safety-critical systems
    • Systems engineering
    • Stakeholder management
  8. Landing Gear Systems EngineerOn site

    Defence and Aerospace company

    £225/day£30/hrInside IR35

    Filton · 6 months · Posted 6 days ago

    • Safety-critical systems
    • Systems engineering
    • PLC / SCADA

    2 adverts

  9. EC&I Hardware DesignerHybrid

    Leading engineering team delivering complex, safety-critical control and automation solutions within the nuclear industry

    Rate not statedInside IR35

    Warrington · 12 months · Posted 6 days ago

    • Safety-critical systems
    • Embedded systems
    • Electronics
    • CAD

    2 adverts

  10. Firmware Engineer (FPGA)On site

    High-integrity or safety-critical industry

    £636/day£85/hrIR35 not stated

    Luton · 12 months · Posted 6 days ago

    • Safety-critical systems
    • FPGA
    • Embedded systems
    • Firmware
  11. Technical Business AnalystHybrid

    Airline operations software company

    £350–£420/dayInside IR35

    Hounslow · 12 months · Posted 5 days ago

    • Safety-critical systems
    • Business analysis
    • REST APIs
    • Requirements gathering
    • Process mapping
    • +1 more

Contracts come from job boards and employers' own careers sites, updated hourly. IR35 status is as stated in each advert: always confirm it with the hirer.

Disclaimer: calculations are estimates only and not financial or tax advice. See the terms.

Copyright © 2026 IR35.org. All rights reserved.