Senior full-stack software engineer with more than 13 years of experience across system design, backend, frontend, infrastructure, and product delivery.

Transforms software ideas, difficult features, and existing systems into complete, reliable products.

More than a decade of software delivery from idea to release, including over 80 SaaS, CRM, and e-commerce projects.

Today’s work is delivered through carefully crafted AI agent workflows grounded in proven deterministic and non-deterministic testing techniques and layers of end-to-end verification.

Ready to help launch a new product, improve an existing one, solve a difficult problem, or bring unfinished work across the line.

Some of my work

Projects

Cryptoli read note + Latest project · Cryptocurrency review and community platform

I applied my full-stack experience across its website, backend, admin tools, community features, moderation, search, notifications, analytics, and real-time features. It also gave me practical experience using coding agents from planning and system design through clear issues, acceptance criteria, deterministic feedback loops, layered testing, automated and manual QA, and running the product.

TypeScript · NestJS · Next.js/React · PostgreSQL · Redis · Playwright

FinancialDocs read note + Full-Stack Engineer · Contract · Remote · May 2025–Jan 2026

Maintained three paystub platforms serving hundreds of users while evolving a shared codebase of 2,000+ service classes. Architected legaldocs.com with a 14-collection CMS model, document generation, dual payments, and webhook-driven CDN caching.

NIXAP read note + Full-Stack Engineer · Contract · Hybrid · Apr 2024–Apr 2025

Built client applications and internal tools, including a multi-tenant VoIP system integrating PBX/SIP protocols with a desktop application for call management.

Dispatch42 read note + Full-Stack Developer · Full-Time · In-Office · Nov 2022–Aug 2023

Architected a real-time logistics CRM with a microservices backend and mobile app, plus serverless notifications and proprietary hardware data feeds.

Travod read note + Full-Stack Developer · Full-Time · In-Office · Apr 2019–Oct 2020

Developed Traduno, an in-house translation services CRM, and led a GraphQL API layer over its existing Ruby backend.

Earlier work

A compact chronology from the full résumé.

Rio — live-streaming backend and frontend.

Crawless — browser automation IDE backend and CRM.

Deditech Com — B2B CRM and home rental platform.

eToro — backend API for a recruitment application.

MKM — UK e-commerce with CRM and payment APIs.

GoodLeap — solar-financing microservices and workflows.

RentInsider — Romanian and European rental platform.

Virail — high-traffic travel search features.

Deutsche Fintech Solutions — financial micro-frontends.

Independent Freelancing — 80+ CRM, SaaS, and e-commerce projects from 2011 to 2019.

The tools and experience behind my work

Technical Profile

Technologies I have used across more than a decade and 80+ projects. This experience helps me design systems, give autonomous coding agents the right work, build reliable feedback loops, find problems, and prove the result works. TypeScript and PHP are where I have the longest history.

Programming
TypeScript, JavaScript, PHP, Ruby, Python, Kotlin, Go, C#, Elixir, Delphi
Frameworks
React/Next.js, Vue/Nuxt, Svelte, Electron, Flutter, Tailwind, Node.js/NestJS/Bun/Deno, Laravel/Symfony/Phalcon, Rails, Django/Flask, Express/AdonisJS, Phoenix
Data & interfaces
PostgreSQL, MySQL, SQLite, MongoDB, DynamoDB, Elasticsearch, Redis, REST, GraphQL, tRPC, OpenAPI
Infrastructure
AWS, GCP, Azure, Docker, Fly.io, Vercel, CI/CD, Linux, Terraform, CDK, OpenTofu, Ansible, Chef
Testing & QA Strategy
Unit, integration, smoke, and end-to-end testing; deterministic type, lint, security, policy, and contract checks; production-like browser, API, real-time, database, and release verification with Jest, Cypress, Playwright, RSpec, Pest, and Cucumber
System Design & Architecture
Modular monoliths and microservices; multi-application and multi-tenant systems; REST, GraphQL, real-time, event- and webhook-driven workflows; caching, queues, payments, document generation, CI/CD, observability, deployment, and recovery
A word from a client

Andrei is a one of a kind senior AI-powered developer that would be an immense added value on any team. Not only is he a master of the latest Agentic-AI workflows, but he ensures the quality of work that comes out is impeccable. He uses very sophisticated AI workflows for producing any full-stack feature in very fast speed with top-notch quality. For anyone looking to hire Andrei on any project, you cannot go wrong, hire immediately; he will make your project much better, and very fast. The best developer I've come across in the past 20 years or so. This is what a top-notch developer should look like in 2026.

Frederic Haddad
Head of Business Development · FinancialDocs

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