Product Engineer & Founder of ProCard

I build software that ships.

Software engineer with a product mind and agentic workflows. I own the thinking, the system design and every line that ships.

At a glance
3+ YEARS

Shipping to production

Web, Android and iOS

SYSTEM DESIGN

Decisions on record

Every trade-off written down

PAYMENTS

Stripe and other processors

Subscriptions and refunds in production

PRODUCT

Business-first decisions

Problem, outcome and scope before code

Selected work

Shipped.

Real products, live users, production grade.

ProCard

ProCard

SaaS
pro-card.me ↗
LIVE IN PRODUCTION

Digital business cards for athletes and modern professionals. A full-stack SaaS platform featuring multi-tenant architecture, Stripe billing, dynamic QR generation, customizable NFC links, and real-time analytics. Built from zero to live MVP in 3 months solo, with continuous engineering.

95+

Users

100%

Solo execution

3 months

Idea to live MVP

Full Stack

Stripe + Auth + Cloud

ReactNode.jsMongoDBStripeTailwind

ProCard Club

IN DEVELOPMENT

Next for ProCard: one place to run a whole sports club. Calendars, training and nutrition plans, camps, competitions, documents, budgets and fees, connected to every athlete's profile.

Sports clubsCoachesPlanningDocuments
Read Case Study

Smart building and IoT platforms

LIVE IN PRODUCTION

Booking, marketplace and billing, in-car apps for Android Auto and CarPlay, a building systems control panel, hospital tablets running 24/7 and thermostat R&D. Owned end to end, from requirement to release.

WebAndroidiOSIn-carIoT
Read Case Study
How I work

How I ship with AI agents

I use Claude Code, Codex and Gemini every day, inside a workflow where I plan, decide and review. Once a plan is approved, the agents run it with the pattern that fits the task.

  • Claude Code
  • OpenAI Codex
  • Gemini
Read the full workflow
  1. Brief

    Me

    I write the problem, the outcome and what is out of scope before any code.

  2. Research & plan

    Agents

    An agent researches the codebase and the docs, read-only, then drafts a plan that is stress-tested before anything is built.

  3. Approve

    Me

    I decide on the plan, record the decision with its trade-offs and pick how the agents will execute it.

  4. Execute

    Agents

    Agents build it with the pattern that fits the task, tests first.

    Orchestrator04 / 08

    One agent plans, hands parts to sub-agents, then combines the work.

  5. Verify

    Agents

    A separate session checks the result against the requirements. Critical code gets a second model.

  6. Review

    Me

    I review every line before it is committed.

  7. Ship

    Me

    I release it and own it in production.

Work with me

How I can help you grow

Three ways to work together. Each one starts from the result your business needs.

For founders and businesses

Product build

A product your customers can use, live on web, iOS and Android.

  • A first release scoped to ship fast, then improved with real usage
  • Accounts, payments and admin built in
  • Fast, responsive and built to convert
  • You own the code, the docs and the accounts
For teams and product companiesMain focus

Product engineer on your team

I own features end to end, from the business need to production.

  • Business needs turned into product decisions with clear trade-offs
  • Web, mobile, backend and cloud
  • Agentic workflows, with every line reviewed before it ships
  • Monthly retainer or per project
For teams before a big decision

Technical consulting

A clear second opinion before you commit time and money.

  • Architecture and system design review
  • AWS cost audit
  • Backend security audit
  • Agentic workflow setup for your team
Why work with me

What you get

How working with me looks in practice, from the first call to production.

Business first

I start from what the feature has to earn or save

Before any code, I want to know what it does for your revenue, your time or your users. I built and run my own SaaS, so pricing, scope and what customers actually use are part of how I think.

ProCardLIVE

95

users on a SaaS I built and run solo

Read the case study

Ownership

One owner, end to end

When something breaks, you know who fixes it.

  1. Business need
  2. Product logic
  3. Architecture
  4. Code
  5. Release

Experience

Built in production before

The hard parts of most products, already shipped and running.

  • Auth and roles
  • Payments and refunds
  • Bookings and capacity
  • Store releases
  • CI/CD
  • Devices running 24/7

Communication

Updates you can read in a minute

Plain language, on a regular rhythm.

Example update

Shipped checkout with refunds

Next admin reports

Need from you the refund policy

Speed with control

AI agents, every line reviewed

I use agents to move fast and review everything they write before it ships.

See how I work

Engagement

Work together the way that fits

  • Per project

    A defined scope, a fixed plan.

  • Monthly retainer

    Ongoing work on your product.

  • One-off review

    Architecture, cost or security.

How we work together

From your problem to a live product

Four steps. You always know what's next, what it costs and when it ships.

01
Discovery

Quick call

20-30 min

You tell me the problem and what it costs you today: lost time, lost sales, manual work. You leave knowing if I'm the right fit and what a first version could look like.

Stage 1 of 4Kickoff
02
Architecture

Plan & estimate

24-48h

You get a written plan: what we build first, what we leave out, the timeline and the price. The scope follows the result you need, so the budget goes where the value is.

Stage 2 of 4Planning
03
Engineering

Build & ship

2-8 weeks

I ship in small releases you can see and use, with regular updates and decisions explained in plain words. You start getting value before the project ends.

Stage 3 of 4Active Dev
04
Handoff

Launch & support

Ongoing

Your product goes live and I stay on for the first weeks to fix what comes up. You own the code, the docs and the accounts. No lock-in.

Stage 4 of 4Production
Clients and mentors

Trusted to deliver

Delivered for Bransha

I owned the biggest parts of the platform: booking, the services marketplace and the billing between residents, owners and providers. I also built the Android Auto and CarPlay apps and ran the builds and store releases.

BBranshaSmart building platform

Delivered for BTGR Group

I worked on the admin platform and several web apps, from the business questions to the technical decisions, and shipped every release I owned.

BGBTGR GroupAdmin platform and web apps

Delivered for Fragar Trading

I built the tools installers and clients use to configure and monitor building systems, from heating and water to air and electrical.

FTFragar TradingBuilding systems

Delivered for BMS Group

Their app stopped working days before a handover. I fixed it overnight, Friday into Saturday, so they could integrate it with their systems and hand it over on Monday as planned.

BGBMS GroupPartner company, Belgium
Cosmin showed a solid grasp of the technical side, from JavaScript fundamentals to React, Node.js and AWS, along with discipline, perseverance and intellectual maturity. He worked in an organised way, explored new concepts on his own and asked for help only when he hit a real blocker. What impressed me most was his perseverance.

From a recommendation letter, translated from Romanian

DDDan-Andrei DiacInterim CTO, Thinslices · his mentor for 8 months
Stan built our website faster than we thought possible. It looks exactly how we imagined and our customers constantly compliment it. Simple process, zero headaches.
RCRoseBeans CaféLocal Business, Brașov
As a software company, we had high technical standards. Stan met them and then some. Clean code, fast delivery, and he communicated clearly throughout the whole process.
MMarmixSoftSoftware Company
Professional, fast, and he actually listens. The new site section went live quicker than we expected and works perfectly. Would recommend to any business that needs a real online presence.
SSoundHouseMusic & Events
We had a basic site that wasn't converting. Stan rebuilt it completely and the difference was immediate: more inquiries from the first week after launch.
KKinetroHealth & Fitness
Stan understood what we needed without us having to over-explain. He gave us practical suggestions that made the final product better than what we originally had in mind.
LLyteNytegridTech & Creative
FAQ

Before we start

What companies and founders usually ask before working with me.

Contract roles as a product engineer, projects with a defined scope, a monthly retainer, and one-off technical reviews. A review can cover architecture, AWS cost, backend security or setting up agentic workflows for your team.

Have a different question?

Send me an email