Senior Cryptography Engineer

The Hague, Netherlands | Hybrid/Remote
Full time
Start date:
March 4, 2024

About the job

We are seeking a highly skilled and experienced Senior Cryptography Engineer specialising in the design, analysis, and implementation of zero-knowledge proofs (ZKPs). The ideal candidate will demonstrate deep theoretical knowledge as well as practical experience in deploying cryptographic solutions able to boost both the privacy and efficiency of our systems, minimising the need for trust in humans.

Your future role

As a Senior Cryptography Engineer, your role will be to implement new features and enhance the overall efficiency, stability, and safety of our web application — working across both back-end and front-end aspects. You will play a pivotal part in creating a seamless, robust, and secure experience for all our users. It is crucial to be product-minded and obsess about our users and their needs.

Your future company

Circularise is a supply chain traceability start-up founded in The Netherlands in 2016. We believe that end-to-end traceability holds the key to overcoming major challenges that society faces in areas such as Circular Economy, Environmental Pollution and Carbon Emissions. Therefore, it’s our mission to bring traceability to global supply chains and to accelerate world’s transition to a Circular Economy.

Circularise is disrupting industries by changing how companies trace their products and materials and share information about them, enabling sustainable practices at an unprecedented level. We achieve that with a blockchain-based open protocol that enables sharing of information about products and materials while retaining privacy over sensitive information.

We are not your typical startup and would love to invite you to get involved. You can learn more about Circularise at or check out our previous whitepaper. We also have exciting new developments in the making using advanced state-of-the-art cryptography.

What We’re Looking For

At Circularise, we believe a successful candidate merges both exceptional technical ability and outstanding personal qualities. Here's what we're primarily seeking

Non-Technical Requirements

  • Problem-Solving Skills: Ability to tackle complex problems and come up with innovative solutions.
  • Communication: Excellent communication skills for collaborating with both technical and non-technical stakeholders.
  • Teamwork: Must work well in a team environment, contributing to a collaborative work culture.
  • Leadership: Experience in leading projects or teams and providing guidance in cryptographic methods and best practices.
  • Project Management: Capable of managing multiple projects simultaneously and meeting deadlines with attention to detail.
  • Adaptability: Ready to adapt to new challenges and stay ahead of rapidly evolving technology trends.
  • Continuous Learning: A commitment to continuous professional development in the field of cryptography and security.

Technical Requirements

(the more you meet, the better)

  • Advanced Degree: A Master's or PhD in Computer Science, Mathematics, or a related field with a focus on cryptography.
  • Zero Knowledge Proofs: Proven experience in the theoretical foundations and practical applications of ZKPs.
  • Cryptography Standards: Familiarity with current cryptographic protocols and standards relevant to blockchain and data security.
  • Software Development: Proficiency in one or more programming languages suitable for cryptographic algorithm implementation.
  • Blockchain Technology: Understanding of blockchain architectures, consensus mechanisms, and smart contract development.
  • Security Protocols: Experience with cryptographic key management, secure multi-party computation, and other advanced security practices.
  • Research and Development: A track record of published research in the field of cryptography or related disciplines would be advantageous.

What you'll achieve

Within 1 month you will...

Within the first month, you will have familiarised yourself with Circularise's technology stack and current cryptographic solutions. You will have been integrated into our team, actively contributing to our ongoing projects, and participating in brainstorming sessions to innovate our approach to privacy and data integrity. You will have begun the process of identifying areas for implementation or improvement of zero-knowledge proof mechanisms within our products.

Within 6 months you will...

After six months, you will have taken ownership of key cryptography projects within the company. You will have designed and helped to implement new features or systems utilising zero-knowledge proofs to enhance the privacy and security of Circularise's offerings. You will have worked closely with the product development and research teams to ensure that our solutions not only meet the highest standards of security but also align with the company's vision of a more transparent and sustainable supply chain. You will also mentor junior team members and represent the company at relevant conferences, contributing to the wider community of cryptography professionals.

Why choose us?

Circularise has an open, informal and growth-oriented culture. A place where you get a lot of freedom and responsibility right away and your opinion counts from day one. You get to work with an amazing group of people.

We offer you an environment in which you can grow and your impact will be of great value. 

  • Competitive salary
  • Hybrid or remote position with flexible hours alongside an amazing diverse team.
  • Flexible working hours.
  • Travel allowance for your commute.
  • 25 paid vacation days (+7 official Dutch holidays) - if living in the Netherlands
  • Help shape a fast-growing scale-up into becoming the next Tech For Good unicorn.
  • Be part of a new industry standard
  • A place to work where your input, creativity and personality is celebrated;
  • All the tools you need to be a high performer including state of the art MacBook to work your magic;
  • We're a hybrid company, but our HQ is located in The Hague (in case you miss your colleagues)
  • Equity: In addition to the salary you will get to own a piece of Circularise as we also provide a generous equity package.
  • Cultural diversity: An international environment with a diverse team of over 20 nationalities. Our development team, comprising multiple nationalities, operates across various European time zones, thereby fostering a rich, multicultural work environment
  • Pension contribution: Circularise contributes 5% on top of your annual gross salary to your pension.
  • YourCampus benefits: When you join us, you will get access to a monthly budget which you can spend in our flexible benefits app, powered by YourCampus. 
  • Learning and development budget: Each employee is allocated a budget of €1000 to upskill themselves through programs of their choice

Everyone belongs at Circularise

We strive to hire people from all walks of life. Circularise is committed to providing equal opportunity for all employees and candidates without regard to race, colour, religion, national origin, sex, age, marital status, sexual orientation, disability, or any other characteristic protected by law. Each person is evaluated on the basis of personal skill and merit. We are continuously working hard to develop and build a culture of inclusivity & diversity.

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Notice to recruiters, agencies & staffing companies
Circularise B.V. and its affiliates (“Circularise”) has an internal recruiting department. Agencies are hereby specifically directed not to contact Circularise employees directly in an attempt to present candidates – Circularise's recruiting team or other authorised Circularise personnel must present all candidates to hiring managers.
Full recruiter policy available here.