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About

A small team of senior engineers.

sigmacode.io is a senior engineering studio for Blockchain, AI and Web. We keep the team small and experienced because the most expensive software is the one you have to rebuild.

Led by a tech lead with 20+ years of experience

Our tech lead has spent more than two decades building production software, from web platforms to data-heavy systems and blockchain applications. On every project, they own the architecture, review what ships and stay your technical point of contact.

  • Solidity
  • AI / ML
  • Frontend
  • Backend
  • DevOps

Backed by a network of 10 senior engineers

For each project we assemble the right people from a vetted network of 10 senior engineers in Solidity, AI/ML, frontend, backend and DevOps. You get specialists without paying for a large agency's overhead.

Senior engineer? Join our network

Team

Who you'll work with

The core team behind sigmacode.io. Projects are delivered together with our network of senior engineers.

  • Tech Lead & Senior Developer

    Ing. Ismet Mesic

    Owns architecture, code review and delivery quality on every project, and stays your direct technical point of contact from the first call to handover.

  • Managing Director & Sales

    Mag. Martin Eckerstorfer

  • Marketing

    Mag. Kurt Jürgen Jöbstl

  • Sales

    Mag. Goldin Dimitri

What we value

Straight answers

We tell you when something isn't worth building, when a simpler solution will do, or when you need a specialist we aren't.

Security by default

Tests, reviews and threat modelling are in the scope of every project from the start.

You own everything

You own the code, the infrastructure and the documentation. No lock-in.

Clear communication

Written scopes, regular demos and direct access to the engineers who do the work.

AI-accelerated engineering

Faster delivery, without cutting corners.

We use AI openly for scaffolding, tests, reviews and documentation. A senior engineer still designs the architecture, reviews every line that ships and owns the result.

01

Senior ownership

Architecture, security-critical code and final review stay with experienced engineers. AI speeds up the work; it doesn't replace judgement.

02

Tests as a contract

Automated tests, static analysis and CI gates make speed safe. For smart contracts: Foundry tests, fuzzing and Slither before every deployment.

03

Transparent from day one

Milestones, demos and repository access from the first day. You always know what was built, how and why.

An EU company

All contracts and invoices are handled by SANICURA d.o.o., a company registered in Croatia (EU). That means EU contract law, GDPR-conform processes and clean B2B invoicing with reverse charge.

Languages

We communicate in English, German, Croatian and Serbian. Other languages on request.

Quality standards

Included in every project.

Standard on client projects and on our own showcase work, never sold as an add-on.

  • Code review

    Every change is reviewed by a senior engineer before it ships.

  • Automated tests

    Unit, integration and end-to-end tests; fuzz and invariant tests for smart contracts.

  • Continuous integration

    Lint, type checks, tests and builds run on every commit.

  • Documentation

    Architecture notes, setup guides and handover documentation for your team.

  • Security review

    Threat modelling, dependency checks and OWASP-minded reviews; Slither for Solidity.

  • Full IP transfer

    You own the code, the infrastructure and the documentation on final payment.

  • Mutual NDA, ready to sign

    Download our mutual NDA on the contact page: confidentiality from the first conversation.

  • EU company

    Contracts and invoices via SANICURA d.o.o., Croatia, under EU contract law with reverse-charge invoicing.

  • GDPR by design

    Data minimisation, EU-friendly hosting options and clear data-processing agreements.

Reply within an hour

Every enquiry gets a personal reply from a senior engineer within an hour on working days.

Selected work

Client work and showcase projects

Client platforms shown with permission, plus our own clearly labelled showcase projects you can try.

Client workWeb & Platforms

GAGA Menjačnica

Currency exchange & precious metals · Novi Sad, Serbia

A Next.js platform for a currency exchange and gold & silver dealer in Novi Sad.

Read case study
Client workBlockchain & Web3

RCIID

Blockchain forensics · Austria

A platform for an Austrian blockchain forensics firm that presents crypto transaction tracing to lawyers, authorities and victims.

Read case study
Client workWeb & Platforms

Sisak Green

Green energy & circular economy · Sisak, Croatia

A bilingual (DE/EN) investor platform for an industrial waste-to-energy project in Croatia.

Read case study

Showcase projects by sigmacode

See all work

Have a project in mind?

Tell us what you're building. A senior engineer replies within an hour on working days — then you get an honest assessment, a clear scope and a fixed-price or milestone proposal, usually within a few working days.

Start a projectBook a free call

Prefer to write first? Write to us

You'll talk directly with Ing. Ismet Mesic, Tech lead.