Avionics​/Electronics Engineer

Position: Avionics / Electronics Engineer
Location: Sassenheim

Your (space) mission
As the Avionics / Electronics Engineer at cosine you play a key role in shaping the electronic backbone of high-performance optical payloads that operate at the frontier of space. You help define and realise robust avionics architectures that enable Earth observation, environmental monitoring, defence-related remote sensing and planetary science missions. From concept to procurement and integration, your work ensures that every electronic subsystem performs reliably in the most demanding space environments.

You translate complex system needs into practical, buildable and procurable solutions that directly contribute to mission success and high-impact decision-making from orbit.

Tasks & Responsibilities

Define and support the avionics and electronics architecture of optical payloads and translate system requirements into robust electronic concepts, interfaces and specifications

Drive procurement activities for electronic subsystems, including supplier selection, technical alignment, quotations and make-or-buy decisions

Act as the technical interface with suppliers and subcontractors, ensuring alignment on design, quality, delivery and performance expectations

Support engineering reviews, including requirements, design, test readiness and manufacturing data assessments

Contribute to system-level integration, verification and test of electronic subsystems across development and production phases

Support risk management activities including obsolescence analysis, component availability and procurement planning

Your profile
We are looking for candidates with the following qualifications:

A Master’s degree in avionics, aerospace engineering, electronics engineering, electrical engineering or a related field

Experience in avionics or electronics development for aerospace, space, defense or other high-reliability systems

Strong understanding of electronic architectures including power, data handling, control electronics and sensor interfaces

Experience with procurement, supplier management or sourcing of electronic components, boards or subsystems

Ability to write and review technical documentation such as specifications, interface documents and supplier statements of work

A structured, pragmatic and delivery-oriented mindset with strong communication skills across multidisciplinary teams

What We Offer
At cosine, we highly value our employees, and we will support your professional and personal development. We also provide our employees with:

A unique, international working environment at the intersection of physics and engineering

The opportunity to deliver end-to-end solutions in autonomous project teams, in close collaboration with customers

A competitive salary with an annual bonus based on individual and company performance

27 days of annual leave (based on full‑time employment)

Hybrid working options, including the possibility to work partially from home

Company bicycle and fitness plans

A personal development budget

Initial one-year contract, with the aim of long-term collaboration

About Cosine
Founded in 1998, cosine is a world‑leading developer of space instrumentation and measurement systems, making the invisible measurable and the complex actionable.

Its expertise spans High‑Energy Optics, including optics developed for ESA's future New Athena X‑ray observatory, as well as remote sensing solutions for Earth Observation and planetary science.

With over 25 years of experience and advanced cleanroom and assembly facilities across the Netherlands, Germany, and Italy, cosine brings deep scientific and engineering expertise to some of the most demanding missions in space and on Earth.

What makes cosine a unique place to work is that your work goes end‑to‑end: from concept and design to building, testing, and delivering hardware that actually flies in space. You work in small, highly skilled teams where you have real ownership and impact, alongside experts in optics, physics, nanofabrication, and systems engineering.

cosine is committed to providing an inclusive and equal opportunities work environment where everyone can thrive. As a proud member of the Women in Aerospace community, we recognise the importance of diversity, inclusion, and equal opportunity in the workplace.

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