GAGA Menjačnica
A fast Next.js platform for a currency exchange and gold & silver dealer in Novi Sad.
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A small senior team, on purpose.
sigmacode.io is a senior engineering studio for Blockchain, AI and Web. We keep the team small and experienced: 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.
Backed by a network of 10 senior engineers
For each project we assemble the right people from a vetted network of 10 senior engineers — Solidity, AI/ML, frontend, backend and DevOps. You get specialists without paying for a large agency's overhead.
Senior engineer? Join our networkWhat we value
Honesty over hype
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 part of the work, not a line item you can skip.
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.
Not add-ons, but how we work: on client projects and on our own showcase work.
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 — EU contract law and reverse-charge invoicing.
GDPR by design
Data minimisation, EU-friendly hosting options and clear data-processing agreements.
Reply within 24 hours
Every enquiry gets a personal reply from a senior engineer within 24 hours 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.
RCIID
A platform for an Austrian blockchain forensics firm that presents crypto transaction tracing to lawyers, authorities and victims.
Read case study
Sisak Green
A bilingual (DE/EN) investor platform for an industrial waste-to-energy project in Croatia.
Read case studyShowcase projects by sigmacode
- sigmacode Assistant
- Document Q&A with citations
- Milestone Escrow
- Token + Vesting + Staking
- SigmaNFT Collection
- Gold-Backed Token (RWA)
- Invoice data extractor
- Smart Contract AI Reviewer
Have a project in mind?
Tell us what you're building. You get an honest assessment, a clear scope and a fixed-price or milestone proposal, usually within a few working days.
Prefer to write first? Write to us