We build dependable systems, amplified by AI

Since 1998, we've been building software and systems for safety, mission and business-critical applications across the world's most demanding industries. AI is now in the engine room.

Success Stories

Solving complex challenges, together.

Working side by side with our customers and partners, we design, build and deliver software and systems that address real-world challenges in safety-, mission- and business-critical environments.

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Automotive
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Critical TechWorks | A Joint-Venture With the BMW Group
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Aviation
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Critical FlyTech | A Joint-Venture with Airbus
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Railway
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Stadler Digital Labs | A Joint-Venture with Stadler
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INDUSTRIES

Where our work makes a difference

From land, sea and sky — and beyond — we work side by side with our customers and partners to help transform industries where safety, reliability and performance matter most.

Aviation

Avionics software development and certification support for defence and commercial aviation — DO-178C, DO-254, ARP-4754A compliant. Trusted by leading aerospace OEMs.

WHAT WE DO

Safety-Critical V&V
Embedded Software Development
RAMS & Certification Support
Integrated Electronic Systems

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Start your journey with us

An award-winning place to work, sharing the company’s success with our employees and taking a transparent approach to performance and growth.

  •  • Lisboa, PT

    Machine Learning Engineer

  •  • Munich, DE

    Frontend Engineer

  •  • Munich, DE

    Senior Product Manager – Space

  •  • Portugal

    Senior Product Manager – Space

  •  • Lisbon, PT

    Senior Product Manager – Defence

Artificial Intelligence

Dependable AI for mission, business and safety critical systems

We build, test, deploy and operate dependable AI systems at scale in a safe and responsible way.
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Newsroom

Let us keep you updated

The latest news, press releases, articles, blogs from the world of Critical Software.

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BlogMedical devices

QMSR's Wake-Up Call

When FDA's Quality Management System Regulation came into effect in February 2026, many saw it as a routine update. QMS consultant John Wolf sees something bigger — a reckoning for medical device companies that have been coasting on outdated compliance practices for decades.

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BlogMedical devices

AI Medical Device Certification

Strong model performance doesn't guarantee regulatory approval for AI-enabled medical devices. As FDA, EU MDR, and EU AI Act expectations evolve, certification success depends on how the entire system is architected, controlled, and governed — not just how well the model performs. Use our self-assessment to identify gaps in your architecture before they become costly certification bottlenecks.<br>

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BlogEnergy

Energy Sector OT Cybersecurity

The old energy cybersecurity perimeter is gone. With millions of distributed energy resources — solar inverters, smart meters, EV chargers — now connected across open protocols, adversaries are exploiting exposed PLCs, abusing remote access credentials, and manipulating operator views at scale. This article examines the 2026 OT threat landscape and what energy operators must do to architect security into grid-edge infrastructure before the next incident.

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News

Dependable AI: Critical Software Contributions Accepted at SAIV 2026 and FLoC 2026

Critical Software announces two research papers accepted at SAIV 2026 and OVERLAY/FLoC 2026, developed within the SONNX working group. The work applies formal methods to eliminate ambiguity in ML model specifications, enable machine-checked verification, and support certification in safety-critical industries such as aerospace, defense, and transportation.<br>

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BlogEnergy

Why IEC 62443 Matters Beyond Compliance

IEC 62443 is becoming more than a compliance requirement for energy organizations. This article explores why its principles of segmentation, secure-by-design engineering, and lifecycle management are now essential for building resilient industrial infrastructure.

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BlogMedical devices

IEC 62304 Edition 2: The Biggest Change in 20 Years Is Coming

IEC 62304 Edition 2 is no longer a future concern. With a major scope expansion to health software, AI lifecycle requirements, and cybersecurity in design control, the window to prepare is shorter than most teams realise.

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BlogMedical devices

5 Reasons SBOMs Are Now a Core Engineering Requirement

From federal mandates to cybersecurity resilience, Software Bills of Materials are no longer a compliance afterthought. Here are five reasons why SBOMs have become a foundational engineering practice — and what your team needs to know to stay ahead.

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BlogEnergy

NIS2 Compliance for Energy Teams

NIS2 is reshaping cybersecurity in the energy sector by shifting responsibility from reactive compliance to secure-by-design engineering. It places emphasis on operational resilience, supply chain oversight, strict incident reporting timelines, and executive accountability, requiring engineering teams to integrate security into system architecture from the start.