Senior Software Engineer

Shape the future of trusted digital signing

Join Cryptomathic's Signer team and help build secure software that enables trusted digital signatures and seals for governments, financial institutions, and trust service providers worldwide.

As a Senior Software Engineer, you'll work on a complex, business-critical platform where security, reliability, and compliance are essential. You'll be part of a small, experienced team with significant influence over technical decisions while remaining hands-on and close to the code.

About Signer

Signer is Cryptomathic's electronic signing platform, enabling trust service providers, governments, and financial institutions to deliver legally binding electronic signatures and seals. Built on industry standards and aligned with eIDAS, Signer helps customers implement trusted digital signing solutions at scale while meeting demanding security and compliance requirements.

What you'll do

As a member of the Signer team, you will work on a product at the intersection of security, cryptography, cloud technologies, and enterprise integrations. You will help evolve a platform used in highly regulated industries where reliability, security, and performance are non-negotiable.

As a senior member of the team, you will help shape our technical direction and contribute to feature design, backlog refinement, estimation, and the continuous improvement of our development practices.

Who you are

Most importantly, you are an experienced developer who enjoys staying close to the code. You enjoy solving difficult technical problems and understand that great software is built by strong teams.

You take ownership, stay with challenges until they are properly resolved, and remain constructive when things get complicated.

You share knowledge, support colleagues, and are comfortable challenging existing approaches when you see a better way forward. And you are a team player who cares about the overall result, not only your own tasks, and contributes to an open, inclusive, and collaborative working environment.

Ideally, you have:

• At least five years of professional experience developing software
• Strong hands-on Java development experience
• Strong problem-solving and analytical skills

Experience in one or more of the following areas would be an advantage:

• Cryptography, PKI, digital signatures, or other security-sensitive software solutions
• Experience using AI-assisted development tools pragmatically to improve efficiency while maintaining high standards of software quality and security

You do not need to tick every box. If you are a strong Java developer with an interest in secure software and a willingness to learn, we would still like to hear from you.

Why you might enjoy working with us

You will join a small, experienced team where your contribution is visible, and your technical judgement matters. You will have the opportunity to stay close to the code while influencing how we design features, improve the codebase, and evolve our development practices.

Signer offers technically demanding work at the intersection of Java, security, cryptography, and digital trust. You will work alongside experienced colleagues and have the opportunity to deepen your expertise in a highly specialized domain.

Our Aarhus development office has a collaborative and informal working environment built on openness, knowledge sharing, and pragmatic problem-solving. We care about building reliable software, supporting one another, and continuously improving how we work.