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Company Description
At KeyTalk, we build trust, literally.
We are a Dutch scale-up with global ambitions, specializing in PKI Certificate Lifecycle Management (CLM)solutions. Our software automates certificate discovery, provisioning, and renewal across enterprise IT, OT, and IoT environments; both on-prem and in the cloud. Our core DevOps team runs the backbone of our business. We operate lean, smart, and with deep technical pride. One day a week we meet at the Amersfoort office; the rest we work from wherever we perform best. We are now expanding this core with a seasoned Back-end Developer who can help us evolve from “best-kept secret” to global contender.
Role Description
This is a full-time hybrid role for a Senior Back-End Developer based in Amersfoort, with 70% work from home acceptable. The Senior Back-End Developer will be responsible for designing, implementing, and maintaining back-end services. This role involves collaborating with cross-functional teams to enhance platform functionalities, ensuring efficient and secure operations, and troubleshooting issues as they arise.
You will work hands-on as part of our core development team on:
✓ Modernizing our legacy C/C++ codebase while building new components in C# / ASP.NET
✓ Integrating with cloud-native and enterprise ecosystems
✓ Strengthening the security and scalability of our CLM platform
✓ Bringing new features to life
✓ Acting as a technical sparring partner on our developers and architecture team
Qualifications
- A European passport
- Willingness to work directly for us
- Proficient in secure coding, code review, and automated testing
- Strong in C/C++ (for legacy maintenance & extensions)
- Solid experience in C#, ASP.NET
- Proficient in SQL, multithreading, RESTful APIs
- Experience with Docker, Kubernetes, and Ansible
- Healthy interest in Entra ID / MS Graph and other Cloud based services integrations
Preferred
- gRPC / Protobuf
- .NET 8+ / C# 12+
- MS Blazor
- Generative AI-assisted development
- OpenSSL experience
- Applied interest in post-quantum cryptography (QPC)
- MySQL admin experience
Key Skills
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