Worked with

  • JadrolinijaMaritime transport
  • KBC DubravaClinical hospital centre
  • TokićAutomotive retail
  • MyPatientSpaceDigital health
  • Hotel TRSHospitality
  • ZelendurRehabilitation clinic
  • ENCANTOEU project group
  • Keeper SolutionsTechnology

Named with the permission each engagement allows. Where a project sits under an NDA, we describe it by domain rather than by client.

What we build in

  1. Backend.NET 10ASP.NET CoreNode.jsC#
  2. WebVue 3AngularNext.jsBlazor
  3. MobileKotlinSwiftKMM
  4. DataMS SQLPostgreSQLMongoDBRedis
  5. Cloud and CIAWSAzureGitHub Actions
  6. AIOpenAIAnthropicRAGAgents

At a glance

Small senior team, long-running products.

Reference products we co-own, not only build. We carry product risk, not just delivery risk.

  • 2018Founded in Zagreb, working under EU law
  • 100%Of our engineers hold senior positions
  • 5+Countries with our products in production
  • 7 yrsLongest continuous partnership, running since 2019
  • 10+Projects delivered behind a partner brand

How we work

Four ways in.

All four end with a scope somebody here is accountable for by name. We do not do body leasing, because that is the one shape in which we cannot stand behind the result.

  • End-to-end product team

    We own the technical delivery of a product or product stream, from architecture through production and continued development.

  • Engineering scope ownership

    A defined backend, mobile, integration or platform scope, fully owned by us inside a larger programme.

  • Fixed scope

    Clearly defined modules, integrations or work packages delivered against agreed outcomes and an agreed price.

  • White-label delivery

    We work behind the partner brand wherever the commercial relationship requires it, with no claim on the client relationship.

Pricing

We publish the numbers.

Most agencies make you book a call to find out whether you can afford them. Here is where our work actually lands.

€4,500 to €6,500
Technology Health Check, five working days, written findings
€9,500 to €14,000
AI readiness assessment, two weeks
€18,000 to €35,000
Full technical due diligence report, two to four weeks
€3,500 to €6,000
Fractional CTO, per month, minimum three months

Assessment fees come off your first invoice if we go on to build, on projects above €50,000, valid six months. Development is scoped after discovery week and priced per engagement.

See consulting in detail
NEW · RESSER AI

Custom AI systems built for production.

AI-powered web and mobile applications, intelligent automations and private AI infrastructure tailored to real business operations.

Visit Resser AI

Honesty first

When we are not the right choice.

We turn work down regularly, and it is cheaper for everyone to read it here than to find out in week three.

  • You need thirty developers next month. We cannot do that, and we will say so rather than promise it and hire in a hurry.
  • You want people to manage yourself day to day. A staffing supplier will serve you better and cost less.
  • The budget covers the build and nothing after it. Software without a second year is a liability with a launch date.
  • A standard product already covers most of the need. Build the missing part as an integration instead of replacing what works.
About Us

An engineering studio with shipped software behind every claim

Resser Solutions is a Croatian engineering studio that builds B2B and B2C software for clients across Europe. We work on the systems people use every day: native mobile apps, web platforms, internal business tooling, and the infrastructure underneath.

Most of our developers have shipped production software for more than five years. Clean code, observability, and operability are the default rather than premium options that only come up when something breaks at 3 a.m.

Learn More
Zagreb, Croatia

What we are good at, and what we are not

Being specific about this saves everyone a call. Resser Solutions has been running since 2018 out of Zagreb, every engineer on a project is senior, and we work under EU law.

The size is the point. Product teams run two to eight people, so the person who scopes your work is the person who builds it. Four of our eight reference products are ones we co-own rather than merely deliver, which means we carry product risk and not just delivery risk. It also means we cannot put thirty developers on something next month, and we will say so rather than promise it and hire in a hurry.

  • Software a business depends on daily, where downtime and wrong numbers cost real money.
  • Systems somebody else built, that now need assessing, fixing or taking over.
  • AI inside software that already exists, delivered into production rather than into a demo.
  • Work where EU jurisdiction and data residency are requirements rather than preferences.

How an engagement usually starts

Almost always with a discovery week. Fixed fee, five working days, and a written scope with a firm price at the end of it. If the engagement is an assessment rather than a build, that fee comes off your first invoice when we go on to do the work.

We would rather charge for that week and give you something defensible than write a free proposal full of assumptions. The scope is yours either way. If you take it to another supplier, that happens and it is a fair outcome.

Start here

Tell us what is worrying you.

You get a written read on your situation within three working days. One page, from a senior engineer, on what sounds like a real risk and what does not. Free, and there is no sales sequence behind it.