Taking on new work
We build software end to end.
LEET is a senior software development studio. Fifteen years of production work in .NET, Node and the JavaScript ecosystem — for startups shipping a first version, teams adding senior capacity, and agencies who need the build done properly.
- Full-stack web apps
- Backend & API architecture
- MVP builds for startups
- Mobile apps
- Admin portals & internal tools
- Integrations
- Cloud & DevOps
- Architecture consulting & audits
- AI consulting & company modernization
15
Years shipping production software
8
Industries delivered in
3
Continents with clients
4
Platforms: web, iOS, Android, cloud
One team for the whole system
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Full-stack web apps
Product web apps built as one system: .NET or Node on the back, React or Next.js on the front, shipped with the pipeline that keeps them running.
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Backend & API architecture
Modular monoliths, REST and GraphQL APIs, realtime over WebSockets or gRPC, background jobs. Structured so a later split into services is a move, not a rewrite.
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MVP builds for startups
A first version with the scope cut down to what proves the idea, on a codebase the next ten features can land on.
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Mobile apps
React Native for one codebase across both stores; native SwiftUI or Kotlin when the app needs the platform underneath it.
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Admin portals & internal tools
Back-office systems for the people who run the business: scheduling, inventory, licensing, entitlements and permissions.
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Integrations
Payments through Stripe and PayPal, CRM and CMS, analytics, transactional mail and SMS — wired with the failure cases handled.
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Cloud & DevOps
AWS and Azure infrastructure, containers, CI/CD, error tracking and monitoring, so releases stay routine.
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Architecture consulting & audits
A senior read on an existing codebase: what breaks at scale, what to fix first, and what to leave alone.
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AI consulting & company modernization
Where AI and automation genuinely pay off in your product and your back office — piloted on one workflow, measured, then rolled out.
Bringing AI into a company that already works
Most companies do not need an AI strategy — they need two or three processes to stop eating people's days, and a product that uses models where models are actually better. We start from your existing systems, pick the workflow with the clearest payoff, and build it so the result can be checked.
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AI in the product
Document extraction, search over your own content, drafting and classification — with the failure modes handled and the cost per call known.
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Human in the loop
Review and confirmation steps around anything a model decides, so staff stay accountable and sensitive data never leaves the boundary you set.
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Internal adoption
Support triage, back-office paperwork and reporting: one pilot workflow, measured against how long it takes today, then rolled out to the team.
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Legacy modernization
Old systems moved off dead frameworks and manual steps — incremental rewrites, integrations replacing spreadsheets, releases that need no one on call.
Four steps, no dark periods
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Scope
A call or two to find the real problem, then cut the scope down to it.
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Shape
Data model, architecture and stack decided before code, and written down.
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Build
Weekly increments you can click on, in an environment that mirrors production.
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Hand over
Documented, deployed and yours — with support for as long as you want it.
Three ways to engage us
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Fixed-scope project
Defined deliverable, defined price
Best for MVPs, rebuilds and a feature with a deadline. We scope it, quote it, and carry it to production.
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Monthly retainer
Reserved senior capacity
A set number of days a month inside your team and your process. Rolling, cancellable, no recruitment.
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Advisory
Hourly, when you need a read
Architecture reviews, code audits, hiring support and second opinions. Billed by the hour, no minimum.
Small studio, senior work
LEET is a software development studio based in Osijek, Croatia, working remotely with clients around the world — mostly in Germany and Switzerland, and also in the United States, Australia and across Europe.
Fifteen years of production work across document processing, hospitality, grocery e-commerce, healthcare scheduling, logistics and insurance — usually as the people accountable for the whole system rather than one layer of it.
We take a small number of projects at a time and stay on them.
Tell us what you are building
Write a few lines about the project and we will come back with questions, a rough shape and what it would take.
We answer within one working day, and a first call costs nothing.
Or email us directly: [email protected]