Leukeleu

Your technical partner

Together we build your digital future

For many organizations, software is just a tool. But once it becomes a core part of your business model, you’ll likely encounter challenges like fragmentation, outdated systems, or capacity issues. That’s when you need a partner who thinks strategically, grows with you, and works collaboratively: driven, skilled, and in sync.

  • Planbureau voor de Leefomgeving
  • Triodos Bank
  • Accare
  • Jouw Omgeving
  • SoftwareOne
  • WWF
  • Philips Pensioenfonds
  • AcademicTransfer
  • Nederlandse Instituut voor Sport & Bewegen
  • Strohm
  • Vastenaktie
  • College voor Toetsen en Examens
  • GGD Nederland
  • Humanitas
  • Voedingscentrum
  • Achmea
  • KPN
  • FNV
  • VU Amsterdam
  • b.lay
  • Zilveren Kruis
  • UMC St Radboud
  • Centraal Beheer

We build digital solutions that work today and stay valuable tomorrow. Whether you’re starting from scratch or dealing with legacy software, we help you move forward. Our expertise is grouped into four pillars that support your organization’s digital growth.

Custom Development

From idea to impact

Do you have an idea for a new app or platform? We translate your vision into a robust, scalable, and secure software solution. With Python and Django as our technical foundation and an agile mindset driving the process, we build solutions that do exactly what they need to – and are future-ready.

We combine strategic thinking with technical craftsmanship. From the first wireframe to the final release, we’re your technical partner every step of the way.

61

applications in production

6 years

ISO 27001 certified

Modernization

Outdated software, renewed energy

Software that once worked fine can now be holding you back. Poor performance, technical debt, or a UI that drives users away – it’s time to modernize. We help you transform legacy systems into future-proof solutions without rebuilding everything from scratch.

We work in phases, preserving what’s working, improving what’s not.

From closed to open

Modernization is often more than just a technical upgrade – it’s a strategic decision. We help organizations move from closed, proprietary systems to open source solutions. This leads to more flexibility, lower licensing costs, and better collaboration across and beyond the organization. By using open standards and actively contributing to the community, we build software that benefits everyone.

4 million

lines of code across 81 repos

2,341

involved in 2,341 open source issues and PRs (and counting...)

Transformation

From business logic to smart software

Are you using complex spreadsheets, manual processes, or undocumented rules stored only in people’s heads? Then it’s time to translate your business logic into scalable, maintainable software. We help you turn your processes into clear workflows, intuitive interfaces, and reliable backends.

From spreadsheet to scalable platform – make your organization agile and future-ready.

216

clients served

14.8 years

professional work experience developers

Integration

Everything, seamlessly connected

Your platform doesn’t exist in isolation. Whether it’s APIs, data pipelines, AI tools, or third-party systems – we ensure everything communicates smoothly. Smart integrations and automated workflows help you get more value from your data, save time, and improve service delivery.

We build integrations that are reliable, secure, and flexible – so your platform can keep evolving with your organization.

18 years

Python / Django experience

9.2 years

Our current customers/partners have been with us for (on average) 9.2 years

Cases

Explore our cases to see what we’ve built before – and who we built it with.

Working with Leukeleu

We prefer long-term partnerships, where we really get to know your organization. That way, we don’t just build software – we build sustainable relationships. We think along with you, challenge you, and build solutions that work for you, your stakeholders, and your users.

Ready to build your digital future?

Schedule a meeting with our team.