GAGA Menjačnica
A fast Next.js platform for a currency exchange and gold & silver dealer in Novi Sad.
Read case studySenior engineering studio · EU
Blockchain, AI and Web — engineered by seniors. Proven, not promised.
Production software for companies that can't afford a junior experiment. Led by a tech lead with 20+ years of experience, backed by a network of 10 senior engineers.
sigmacode-contracts · forge
Selected clients
Services
Three pillars. One senior team.
One tech lead owns architecture and quality across all pillars. Your contracts, AI workflows and web platform fit together instead of being stitched together.
Blockchain & Web3
Smart contracts, tokens, NFTs, DAOs, dApps and on-chain analytics on EVM chains.
Solidity · Foundry · OpenZeppelin
AI & Automation
Assistants on your own data, AI agents, workflow automation and document processing.
RAG · Agents · Extraction
Web & Platforms
Fast, multilingual websites, web apps, SaaS MVPs and portals.
Next.js · TypeScript · i18n
Care & Retainer
Maintenance, hosting, security updates and a monthly development budget.
Updates · Monitoring · Monthly budget
Selected client work
Shipped, live and in use.
Three platforms our team designed and built, shown with our clients' permission.
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
Don't take our word for it — try it.
Live AI demos and smart contracts we built ourselves: clearly labelled as our own work, built to the same standards as client projects.
sigmacode Assistant
A multilingual sales and knowledge assistant that only knows this website's content. Answers stream in your language.
Try it liveDocument Q&A with citations
Upload a PDF or paste text and ask questions. Every answer links back to the exact passages it's based on.
Try it liveInvoice data extractor
Turn an invoice PDF or photo into validated, structured data — table, JSON and CSV export.
Try it liveSmart Contract AI Reviewer
Paste Solidity or pick one of our showcase contracts and get a structured, severity-ranked security pre-review.
Try it liveHow we work
From first call to long-term care.
Not add-ons, but how we work: on client projects and on our own showcase work.
01
Discovery
A free scoping call to understand your goals, users and constraints. We ask the uncomfortable questions early.
02
Plan
A written proposal with architecture, scope, milestones, risks and a fixed price or milestone budget.
03
Milestones
We build in short iterations with working demos. You get repository access and can give feedback at every step.
04
Handover
Deployment, documentation and a walkthrough for your team. Full IP transfer on final payment.
05
Care
Optional retainer for maintenance, hosting, security updates and continuous improvement.
Quality standards
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.
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.
Why sigmacode
Senior quality without big-agency overhead.
An honest comparison of the three common ways to get software built. Each has its place; this is where we fit.
| — | sigmacode.io | Freelancer marketplaces | Large agencies |
|---|---|---|---|
| Seniority | Senior engineers only, led by a tech lead with 20+ years of experience | Varies widely from profile to profile | Senior leads, often with junior-heavy delivery teams |
| Accountability | One technical owner from first call to handover | You coordinate individual freelancers yourself | Account managers between you and the engineers |
| Breadth | Blockchain, AI and Web from one team | Usually one specialism per person | Broad, sometimes via subcontractors |
| Overhead | Lean team, no sales layers | Low overhead, but management effort is on you | Higher overhead built into rates |
| Contract & IP | EU company, NDA and full IP transfer as standard | Depends on the platform's terms and the individual | Usually solid, often with longer negotiations |
| Communication | Direct access to the engineers, in EN, DE, HR or SR | Direct, availability varies | Structured, but often indirect |
Seniority
Accountability
Breadth
Overhead
Contract & IP
Communication
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