MRE Labs · Kaunas, Lithuania
Software that holds up in production.
I review, fix, build and run software for companies that can't afford for it to break or leak. You work directly with one senior engineer with 30 years in production systems, from nuclear-sector software to multi-tenant SaaS. When a project needs more hands, I bring in a team of up to 10 experienced engineers I've worked with before, and I stay accountable for the result.
New · Ship-Ready Security Review
Built by an agency or with AI? Get a signed, verifiable attestation in five days.
A fixed-price review of your application: ranked findings with evidence, a fix list, a re-test, and a one-page Release Readiness Attestation you can show customers, investors and insurers.
See how it works →How I can help
Review it. Fix it. Keep it running.
Start wherever you are. Most clients begin with a review and carry on from there, but each step stands on its own.
Know where you stand
An independent security review of code you didn't write yourself, whether an agency, an offshore team or an AI tool wrote it. Findings, fix list and a signed, verifiable attestation.
Get it done properly
Remediation of review findings, or new backend and full-stack work. Scoped into deliveries, each with a fixed price, a clear outcome and a date.
Keep it safe after launch
I keep your system patched, monitored and documented after an initial hardening delivery. You get one accountable person who knows the system, not a ticket queue.
Build & fix
What I build.
Backend-heavy, production-grade work. Where a project needs design or a specialist, I bring in vetted partners and stay accountable for the result.
Backend & APIs
Services, APIs and data models built to be operated, not just demoed.
NestJS · Node · ASP.NET Core · PHP · PostgreSQL · MongoDBArchitecture & audits
Greenfield designs, multi-tenant foundations, and honest assessments of legacy systems.
multi-tenancy · scaling · migration plansInfrastructure & DevOps
Cloud or private infrastructure, CI/CD and containers, set up so someone else can run it too.
AWS · Azure · Debian · Docker · CI/CDAI agents & LLM features
Agents and LLM features that respect permissions, budgets and EU AI Act obligations.
agents · RAG · tool use · AI ActReal-time, IoT & telephony
Device-to-cloud data, real-time systems and VoIP platforms.
MQTT · LoRa · FreeSWITCH · VoIPFrontend & mobile
Web and mobile interfaces on top of a solid backend, with partners for design.
React · Angular · Next.js · native / cross-platformWhere the experience comes from
I've run what I build.
Nuclear-sector software
Work where correctness, traceability and documentation are requirements, not nice-to-haves.
A telephony platform I operate
A multi-tenant VoIP platform serving business customers, running on a fleet of servers I maintain myself.
AI products and agents
Building an AI-powered language-assessment product and agent systems, with EU AI Act compliance in mind.
Cloud and self-hosted operations
AWS and private infrastructure, networking and monitoring, run day to day rather than set up once.
How I work
Small, senior, accountable.
No account managers, no juniors learning on your project, no open-ended invoices.
- Fixed price per deliveryWork is split into deliveries with an agreed outcome, price and date. If scope changes, you get a new quote before any extra work starts.
- Directly with meYou talk to me from the first call to handover. When a team is involved, I lead it and review its work.
- Built to be handed overDocumentation, tests and infrastructure as code, so your team or the next engineer can take over without me.
- Security by defaultEvery delivery gets the same baseline checks I use in my reviews.
- EU-based, EN & LTKaunas, Lithuania. NDAs as standard, GDPR-aware, working in English or Lithuanian.
About
Hi, I'm Zilvinas.
I've spent 30 years building and running production systems. MRE Labs is my practice: I take on a small number of clients at a time, so each one gets my full attention.
Over the years I've seen the same pattern: software is built quickly, launched, and only questioned when a customer, an auditor or an attacker starts asking. I'd rather you hear the answer from me first.
Get in touch
Tell me what you're building, or what worries you about it.
A few lines is enough: what the product does, where it stands, and what you need. I reply within one business day.
Prefer email? hello@mrelabs.dev