Software that
keeps performing

Your custom platform has been running for years, but the market never stands still. Spartner takes the baton — even if we did not write the code ourselves — and delivers maintenance, ongoing development and a solid SLA. That way you stay secure, fast and future-proof without turning your processes upside down.

Standing still means falling behind

Ready for tomorrow

Smart choices today prevent costly surprises tomorrow

Automate

By automating routine updates, tests and monitoring we detect issues before users notice them.

Integrate

We connect your existing stack with modern APIs so data can flow freely and no one has to duplicate work.

Optimise

We fine-tune performance: shorter load times, lower hosting costs and a happier help desk.

Secure

Security patches, penetration tests and code reviews create a three-layer wall against data leaks and downtime.

Why it is worth acting now.

From cost centre to strategic lever
Cars undergo an MOT; software really should as well

Cars undergo an MOT; software really should as well.

Just like an engine that regularly needs oil, your platform needs updates, refactors and new features to keep running smoothly.

Benefits at a glance

  • Fewer emergency patches, greater predictability

  • Shorter time-to-market for new features

  • Stronger safety net thanks to a solid SLA

  • Continuity of domain-specific knowledge remains secured

Step-by-step plan for maintenance and evolution.

A structured approach to keep your platform stable and help it grow.

Step 1 – Intake & code scan

Step 1 – Intake & code scan.

We dive into your repository, CI/CD pipeline and documentation. What strikes us is that almost every project hides new surprises — from hard-coded passwords to forgotten licences.

Step 2 – Assemble the roadmap

Step 2 – Assemble the roadmap.

Based on impact and risk we decide the sprint order, balancing quick wins and structural improvements.

Step 3 – Stabilise

Step 3 – Stabilise.

We patch libraries, set up automated tests and configure monitoring — stability comes first.

Step 4 – Evolve

Step 4 – Evolve.

New features, UI polish and API integrations land iteratively. In practice, small iterations drive higher adoption.

Step 5 – SLA & evaluation

Step 5 – SLA & evaluation.

Every month we check KPIs such as uptime, performance and security alerts. That rhythm keeps everyone sharp and prevents knowledge from draining away.

Ready to talk further?

Ready to talk further?

Sound good? Let’s jump on a call and discover how your software can move forward again — no stress, no lengthy sales pitch, just an honest conversation.

A critical look at legacy

A critical look at legacy.

Why "throw it away and start over" is rarely smart

You will recognise it: a solo developer disappears, documentation is sparse and the code feels like spaghetti. That does not automatically mean refactor-from-scratch.

Damaged yet valuable foundations

Legacy code often contains unique process logic and links to internal systems. Rewriting these one-to-one costs time and money.

Risks of big-bang rebuilds

  1. Long freeze periods

  2. Loss of domain knowledge

  3. Unforeseen regressions that surface late

As mentioned earlier: incremental modernisation — think strangler pattern and feature toggling — provides calm and continuity.

Practical tips you can apply tomorrow

Practical tips you can apply tomorrow.

Start small, big impact

  1. Update your dependency manifest weekly, not yearly.

  2. Place a top-level README with set-up instructions in five steps.

  3. Add health endpoints for monitoring: /status = 200 OK.

  4. Automate database migrations with version control (Flyway, Liquibase).

  5. Reserve at least 10% of every sprint for tech debt.

Bonus: test coverage

In practice you will often find that 60% coverage is enough for confidence — 100% sounds great but slows innovation.

Looking ahead to the future

Looking ahead to the future.

From reactive to predictive maintenance

Machine learning may sound buzz-wordy, but predictive monitoring spots performance degradation based on log anomalies. You might call it magic — until you see the data.

Concrete scenarios

  • Detect RAM leaks before pods crash

  • User-flow analysis to decide which feature to develop next

  • Security scans that automatically follow CVE feeds and serve pull requests

Better still, such tooling is often open source and costs mainly configuration time, not hefty licence fees.

Hans Lugtenberg

"A deal is a deal"

Yield.inc is a new asset manager in the Netherlands that focuses on excellent customer experience, sustainability and technology. When faced with the question of whether to develop our platform in-house or with a partner, we got in touch with Spartner. We are still 100% behind the choice for Spartner because we own the source code and with Spartner, a deal really is a deal, whether it concerns the delivery date or the agreed budget!

Hans Lugtenberg Partner at Yield Inc.

Norbert Wegter

"A professional software partner since 2010"

Spartner is involved and contributes in our search for innovations and always delivers top-notch work. After the first Huurda.nl version got out-dated, we collaboratively launched a completely new version in 2020.

Read more

Norbert Wegter Owner of 123wonen and Expat Homes Holland

"Doijer & Kalff"

After transferring our D&K portal to Spartner, we have elevated the further development and continuity to a higher level. Although the D&K platform was originally developed internally, our technical expert can now focus on other innovations within Doijer & Kalff. Spartner provides the quality we need without excessive costs. They have seamlessly taken over the care of our portal, allowing us to benefit from a flexible capacity that perfectly aligns with our future plans and innovation goals.

Reinier van Bergen Managing Director at Doijer & Kalff

Jurjen Terpstra

"Pragmatic and flexible collaboration"

Spartner has created a customized portal for us for the accountability of large-scale collaborative projects. This enables us and our partners to execute and account for their plans in a shared environment that is secure, transparent, and manageable. The pragmatic and flexible collaboration with Spartner has ensured that we have quickly achieved a functional and user-friendly environment.

Jurjen Terpstra Managing Partner at Wecreate Consulting

Marco Caspers

"AI and machine learning as legal tools"

In 2020, we transferred the development of Lynn to Spartner. As a result of their fast development process, the Lynn platform achieves an increasingly central role in the legal world.

Read more

Marco Caspers Software Development Manager at Lynn Legal

Bjorn Gubbels

"As a business you must dare to move forward"

Innovation and change are not always welcomed with equal enthusiasm by our employees, man is a creature of habit but as a company you have to dare to move forward and the need for a contemporary drawing program for the realization of various constructions with our Masterbloc bricks was high. For us but also for Spartner, this challenge was a bit of pioneering and together we had to overcome some hurdles to arrive at a beautiful and efficient business tool. A development and learning process for both parties, in which the feedback of questions and desired adjustments by our employees to Spartner was always in good consultation and we could count on quick feedback and targeted solutions. We continue to exchange experiences with Spartner and look back and forward to a successful collaboration.

Read more

Bjorn Gubbels Owner of Masterbloc

Marco Leenders

"Spartner extends our capabilities and development capacity"

With weekly calls, using our Azure DevOps sprint system, Spartner actively works together with our innovation, communication and software development departments.

Read more

Marco Leenders Head of Automation

Gemeente Groningen

"Flexible collaboration with yearly updates"

The projectteam of the city of Groningen is very enthusiastic about the "Roomfinder" platform.

Read more

Gemeente Groningen Projectteam

Josh Mountain

"Have been using Laravel Excel for years"

We requested custom help to a performance challenge we had in our implementation of Laravel Excel. I was amazed how quickly these Laravel artisans achieved significant performance gains, which saved us a lot of development time.

Read more

Josh Mountain Co-Founder at IncentivePilot.com

Maurice Evers

"Higher occupancy rate thanks to our user-friendly platform"

Throughout the great years that we cooperate with Spartner (previously Maatwebsite, Ed.), our software has been developed continuously. Students and landlords actively work with features like allocation, payments, chat, contract generation and more.

Read more

Maurice Evers Head of Student Housing Department

Maarten Bremer

"Innovating in the digital identification network of The Netherlands and Europe"

The pro-active approach of Spartner was crucial in understanding the complexity of the eHerkenning network.

Read more

Maarten Bremer CTO / Founder Ensured

Niels Winters

"Innovation in legal technology"

As jurists with knowledge of IT, we highly value quality; within code, but also in process. The high work-level and trustworthiness of Spartner gives us the capacity to continuously create innovative features.

Read more

Niels Winters Managing Director JuriBlox

Frequently asked questions

Practical answers to the questions we hear most often.

🤔 Why should I trust Spartner with code you did not write?

Because we have years of experience adopting existing projects. We start with an audit, present our findings transparently and only take over when you agree.

⏱️ How quickly can you start?

After the intake we can deliver commits within a few weeks. To be fair, with complex monoliths we sometimes schedule an extra discovery sprint.

💸 Won't maintenance cost more than a rebuild?

Not necessarily. By working incrementally you spread investment and avoid cold-turkey downtime. Rebuilds swallow budget and attention in one go.

🔐 How do you safeguard security?

We patch dependencies, run daily SCA scans and conduct an external penetration test every year. We patch critical issues within the SLA response time, sometimes within hours.

📈 Can I keep launching new features in the meantime?

Yes. The stabilisation phase runs in parallel with a separate feature branch, so the business does not stand still.

😓 What if my old freelancer suddenly returns?

No problem. We document everything. Should you ever want to switch back, you hand over a complete transfer dossier — transparency above all else.

🛠️ Do you work with Scrum or Kanban?

Both, it depends on your cadence. Some teams thrive on two-weekly sprints, others benefit from a continuous flow.

🏎️ Can you guarantee performance?

We agree measurable SLA targets: p95 response time, uptime percentages and patch windows. No vague promises, but concrete figures.

Feel like a cup of coffee?

Whether you have a new idea or an existing system that needs attention?

We are happy to have a conversation with you.

Call, email, or message us on WhatsApp.

Bart Schreurs
Business Development Manager
Bart Schreurs

We have received your message. We will contact you shortly. Something went wrong sending your message. Please check all the fields.