Principal Security Designer
Company
NestAI is Europe’s fastest-growing physical AI lab. We build open, sovereign, and reliable autonomous systems and AI-enabled command capabilities for real-world operations — environments where reliability isn’t optional.
Our work spans defence, security, and other mission-critical domains where systems must earn trust through performance, not promises. At the core of what we build is an open, modular, and interoperable AI command foundation that integrates data from multiple sources — from UAV sensors and edge devices to situational intelligence platforms — and turns it into decision support and operational capability.
Rooted in Nordic engineering heritage, we focus on openness, reliability, and systems that earn trust through performance. We work with intent, iterate fast, and build technology that protects what matters most.
Role Description
We are looking for a Principal Security Designer to lead the technical security vision for our physical AI products. In this role, you are the bridge between complex customer requirements and our R&D implementation. You aren’t just advising from the sidelines; you are a hands-on architect responsible for the end-to-end security posture of our systems—from the silicon at the edge to the orchestration in the cloud.
You will act as a primary technical point of contact for our customers, translating their high-level security needs into robust, implementable architectures. You will ensure our physical AI is resilient, trusted, and compliant across hybrid environments.
Day-to-Day Responsibilities
Customer Interfacing & Requirement Synthesis: Act as the technical security authority in customer discussions. Translate complex business and regulatory requirements into concrete technical specifications for the engineering teams.
End-to-End Security Architecture: Design and evolve the security framework for physical AI, ensuring a seamless and secure handshake between embedded edge devices and cloud-based backends.
Technical Security Design: Lead the design of core security features such as hardware-backed encryption, secure boot, zero-trust identity management, and secure remote attestation.
Hands-on Development & Prototyping: Remain active in the codebase. You will write and review production-level code (C/C++, Rust, or Python) to prove out architectural concepts and ensure they meet the highest standards.
Cloud-Edge Synergy: Oversee cloud security integrations (e.g., IAM, secret management, VPC security) to ensure that data processed by physical AI remains protected throughout its entire lifecycle.
Security Mentorship & Auditing: Conduct high-level technical code reviews and vulnerability assessments, mentoring senior engineers on "security-by-design" principles.
Qualifications
10+ years of experience in Security Engineering or Architecture, with a proven track record in Product R&D and Embedded Systems.
Strategic Mindset: Proven ability to interface with external stakeholders and customers, explaining complex security trade-offs to both technical and non-technical audiences.
Full-Stack Security Knowledge: Deep understanding of Embedded hardware security (e.g., TrustZone, HSMs, TPMs) paired with strong experience in Cloud Security (AWS, Azure, or GCP).
Polyglot Developer: Strong programming skills in C, C++, or Rust; you are comfortable moving between low-level firmware and high-level cloud integration scripts in Python.
Architectural Authority: Experience building and scaling security architectures for IoT, robotics, or industrial AI systems.
The "Breaker & Maker" Mindset: A deep understanding of modern attack vectors and a passion for building systems that are inherently resilient to them.
Preferred: Experience in high-stakes sectors such as Defense, Automotive, or Critical Infrastructure.
Why join NestAI
At NestAI, you’ll build meaningful, real-world technology as part of a world-class team of engineers, scientists, and experienced professionals. You’ll work on systems where reliability genuinely matters, contribute to Europe’s security and resilience, and solve problems that demand depth, trust, and craftsmanship.
If you want to build with purpose — and with leading experts in the field — you’ve come to the right place.
Perks & Benefits
We offer a growing set of practical benefits to support your work and wellbeing, day to day:
Occupational healthcare (currently provided by Mehiläinen)
Epassi Flex benefit (sports, culture, commuting, wellbeing)
Lunch benefit (25% tax-free coverage)
Regular team lunches and all-hands events
Your choice of Mac or PC
Holiday allowance (50% of holiday salary)
Phone benefit according to company policy (subscription and device)
We are continuously developing and expanding our benefits as we grow.
Practicalities
Employment is subject to applicable security screening (including SUPO, where required).
NestAI is an equal opportunity employer. We consider all applicants based on their skills, experience, and potential.
- Department
- Engineering Solutions & Architecture
- Locations
- Tampere, Helsinki
- Remote status
- Hybrid
- Employment type
- Full-time
About NestAI
Physical AI is moving from theory to reality. The systems being built today will shape how societies protect people, operate critical infrastructure, and respond under pressure for decades to come.
At NestAI, close to 100 engineers and scientists work at the intersection of software, hardware, and AI — developing autonomy, sensing, and command capabilities for mission-critical use. This isn’t demo work. It’s real systems, built for real environments.
We build in Europe, with open and interoperable architectures, so that critical capabilities can evolve over time without lock-in — and remain accountable to the societies they serve.