About eldr
We build software that
earns long-term trust.
Alongside our own products, we help organisations build modern, secure, and scalable software — with the rigour and values the people who use it deserve.
Who we are
We care about
getting it right.
We have deep experience across large-scale cloud platforms, high-performance backend systems, embedded software, and security-critical applications. We have built systems that serve millions of users, and worked at the other end of the spectrum where every nanosecond of latency matters.
That breadth shapes how we approach every project — whether it is an early-stage startup finding its footing or an enterprise team untangling years of accumulated complexity. We bring the same standards, the same curiosity, and the same commitment to shipping software that actually works in production.
We believe the best software is built on honest engineering principles — not shortcuts that look fine today and create problems next year. That is the only way we know how to work.
15+
Years of experience
Across cloud, backend, embedded, and security engineering
M+
Users served
Experience building and operating large-scale production platforms
OSS
Open source first
We build in the open and give back to the communities whose tools we rely on
EU
European values
Data sovereignty, user rights, and privacy treated as genuine design constraints
What we stand for
Our values
These are not posters on a wall. They are the decisions we make every day about how to build software and how to work with clients.
Security is not optional
Security is a property of good engineering, not a feature you add at the end. We apply threat modelling, secure coding practices, and proper access controls from the first line of code. Our clients' users trust them with their data — we take that seriously on their behalf.
Modern, scalable, and built to last
We have experience with systems that serve millions of users, where latency is measured in microseconds. That range of experience informs everything we build. Good software does not just work today — it holds up as load grows, requirements change, and the team that built it moves on.
Grounded in an age of AI
AI is moving fast, and we embrace that — but we do not think it replaces the need for solid engineering foundations. We integrate AI practically and responsibly: explainable models, auditable pipelines, ethical data practices, and systems that your team can reason about and maintain over time.
Open source is a commitment
The tools we build on every day exist because someone chose to share their work. We honour that by contributing back — releasing libraries, tools, and templates under permissive licences, and building in public where we can. Open source makes software better for everyone.
Data protection and user rights
Data sovereignty is not a compliance formality — it is a fundamental right. We design systems with clear data ownership, minimal collection, explicit consent, and GDPR-compliant flows as standard. People's data belongs to them, and the software we build reflects that.
Honesty over hype
We will tell you when a simpler approach is the right one. We do not recommend technologies because they are trendy, oversell what AI can do, or pad engagements with unnecessary complexity. Good advice sometimes means saying something you might not want to hear — and we would rather do that than build something you will regret.
Want to work with a team that shares your standards?
We take on project-based work and hourly consulting. Tell us about what you are building and let us have an honest conversation about how we can help.