Hello, I'm

Sergiu
Full-Stack Engineer

10+ years designing, building, and scaling web applications. From architecture to delivery.

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About

A Full-Stack Engineer with 10+ years of experience across a wide range of industries. I take full ownership of projects — from architecture to delivery — and integrate seamlessly into existing teams as a reliable, self-sufficient contributor.

Experience

Streamec

Lead Full-Stack Engineer

A Swedish music-tech company delivering licensed, gym-optimized audio streaming solutions to fitness facilities across Europe. Their core product is a subscription-based platform combining Raspberry Pi hardware with a web dashboard, which enables gym owners to manage and schedule their in-venue music experience seamlessly.

Led a team of 3 on end-to-end development of the dashboard and backend services. Architected the audio processing pipeline on embedded hardware. Owned engineering processes from architecture decisions to cross-functional collaboration with music rights and operations teams.

PHP Laravel JavaScript VueJS MySQL Docker
Nov 2024 — Present

Nordhealth

Senior Full-Stack Engineer

A Nordic healthcare company delivering a large-scale patient management platform which serves a high volume of users across sensitive clinical workflows. The project demanded rigorous engineering standards across a complex, feature-rich application with extensive third-party integrations and strict data privacy requirements.

Integrated governmental and healthcare third-party services including national patient apps and clinical communication systems. Drove the desktop-to-web migration and improved platform scalability through targeted refactoring and performance optimizations.

PHP Laravel JavaScript VueJS MySQL Docker
May 2024 — Nov 2024
7 months

MenuLabs

Senior Full-Stack Engineer

An American startup operating in the restaurant management space, delivering a multi-sided platform spanning inventory and menu management, customer-facing ordering, and real-time order fulfillment. The product required deep integration work across a wide range of external services within a rapidly evolving codebase.

Served as the de facto integration specialist, owning all major third-party services — payment gateways, external POS systems, and SMS/voice communications. Evolved the application architecture as the product scaled, and delivered high-impact features across all three platform surfaces.

PHP Laravel TypeScript VueJS MySQL Docker
Mar 2021 — Feb 2024
3 years

Massachusetts Technology Innovation

Senior / Lead Full-Stack Engineer

An American pharma-tech startup focused on streamlining the creation and management of regulatory documentation for medicines and pharmaceutical equipment. The platform combined a sophisticated in-browser PDF editor — featuring digital signatures and complex document manipulation — with a configurable workflow engine, all built to comply with FDA data integrity and audit trail requirements.

Led the core development effort across the workflow engine and PDF editor. Designed for compliance and scale, structuring the application into microservices with FDA-aligned versioning and security requirements. Improved developer experience through targeted refactoring of critical application layers.

PHP Laravel TypeScript VueJS MySQL AWS
Jun 2020 — Mar 2021
10 months

Advisr

Senior / Lead Full-Stack Engineer

An Australian insurance brokerage seeking to modernize their platform away from a heavily customized, legacy WordPress codebase that had become a bottleneck for further development. We delivered a purpose-built replacement with a flexible architecture within a short timeframe, encompassing broker profile management dashboards and a customer-facing broker review and rating system.

Led the full platform rewrite, providing architectural direction and hands-on implementation guidance throughout the migration. Designed a flexible, extensible architecture capable of supporting the client's long-term customization roadmap.

PHP Laravel JavaScript jQuery MySQL Docker
Jan 2020 — May 2020
5 months

The Web Room

Backend Engineer

A Romanian travel-tech startup building an aggregation platform that consolidates vacation and accommodation data from multiple third-party sources into a unified, client-facing API. The core engineering challenge lay in integrating heterogeneous data sources, normalizing their output, and exposing it in a clean, consistent interface for downstream clients.

Owned the full suite of data source integrations, handling ingestion and normalization across multiple external providers. Designed and refined the client-facing API layer, ensuring aggregated data was served in a logical, consistent, and scalable manner.

PHP Laravel MySQL AWS Docker
Apr 2019 — Dec 2019
9 months

AirTreks

Full-Stack Engineer

An American air travel company operating a suite of interconnected APIs and customer-facing applications for flight aggregation and booking. The platform consolidated flight and ticket data from multiple external sources, exposing it through consumer applications covering core travel workflows including flight search, booking, ticket generation, and contract management.

Delivered new features across the full application stack, contributing to both the aggregation APIs and the customer-facing booking experience. Improved and optimized existing API functionality, enhancing the reliability and consistency of flight and ticket data flowing through the platform.

PHP Laravel JavaScript jQuery MySQL
Feb 2018 — Dec 2018
11 months

Target-E Digital

Full-Stack Engineer

A Romanian digital agency delivering a broad portfolio of web projects, from presentation websites to complex automotive dealership platforms with contract generation and documentation management. Worked in close collaboration with a German sister company on marketing-integrated solutions, with frequent direct client engagement throughout the delivery process.

Contributed across a diverse project portfolio, implementing new features and improving existing solutions. Ensured long-term project health through ongoing maintenance and bugfixes. Acted as a direct client liaison, handling requirements gathering and technical consultancy.

PHP TYPO3 CMS JavaScript jQuery MySQL Vagrant
Jun 2016 — Feb 2018
1 year 9 months

Freshbyte

Full-Stack Engineer

A Romanian development studio where I began my professional career, working on a CRM platform for a real estate agency. The application covered core real estate workflows including property evaluation management and contract generation. Over time I progressively took ownership of the project, eventually becoming the sole engineer responsible for its development and maintenance.

Delivered bugfixes and iterative improvements across the platform, with a particular focus on the contract generation workflow. Grew into full ownership of the project, transitioning from a supported junior role to sole engineer.

PHP JavaScript jQuery MySQL
Jun 2014 — Oct 2015
1 year 5 months
Projects
01

Achievement Tracker

A social media app focused on bringing positivity to online interactions — users share and celebrate personal achievements rather than curated highlights. Intentionally built in an unfamiliar stack as a learning exercise. In development.

C# .NET
02

This Website

A personal portfolio built from scratch with no frameworks — just HTML, CSS, and vanilla JavaScript. Features a boids flocking simulation with pixel-art animated sprites that avoid both the cursor and the page content.

HTML CSS JavaScript Canvas
03

Psychotherapy Website

A presentation website for a psychotherapist, featuring a clean layout designed to build trust with potential clients and a contact form for appointment inquiries.

HTML CSS JavaScript