Looking for a job

Sergiu Cojocaru

@sergiucojocaru

Message

I build mission-critical .NET platforms, from real-time monitoring and payments to high-scale SaaS products.

Moldova

Message

What I'm looking for

I'm open to remote work where I can own architecture through delivery, build mission-critical .NET products, lead engineering teams, and apply AI-assisted development to improve delivery speed and quality.

At Kapto, I architected and shipped a platform end-to-end as the sole senior engineer, serving 231 companies and more than 10K users. I built React and .NET microservices handling 26K requests per day at 26.8 ms median latency.

I improved page-load time by 18% and task completion by 57%, while embedding Copilot and LLM-assisted code review to reduce feature turnaround and manual QA effort.

Previously at Technosoft and Stefanini, I led teams delivering ERP/CRM products and a real-time monitoring system for the UK and Spanish armed forces processing 30K events per second across 15K nodes.

Across 25+ years, I’ve built payment systems processing $20M in transactions, an embedded operating system powering 18K devices, and Forum.md at 15K concurrent users.

Experience

Work history, roles, and key accomplishments

Current

Senior Full Stack Developer

Current

Kapto

Jan 2024 - Present (2 years 8 months)

Architected and shipped the product end-to-end as sole senior engineer, owning frontend, backend, and infrastructure decisions for a platform serving 231 companies with more than 10K users. Engineered a responsive React frontend that cut page load time by 18% and lifted task completion by 57%.

React .NET gRPC REST Microservices Azure Docker Kubernetes RabbitMQ CI CD AI assisted Development Copilot LLM Assisted Code Review and Automation

.NET Developer / Team Leader

Technosoft

Jan 2019 - Dec 2024 (5 years 11 months)

Led an 8-engineer team delivering ERP/CRM solutions for a Dell and HPE channel partner, shipping 23 production releases. Re-architected legacy modules, cutting processing time by 11% and reducing production defects by 28%.

.NET Angular SQL AI assisted Development Team Leadership ERP CRM

.NET Developer / System Architect

Stefanini

Jan 2015 - Dec 2019 (4 years 11 months)

Engineered a real-time monitoring system from scratch for the UK and Spanish armed forces, processing 30K events/sec across 15K nodes. Directed technical delivery as System Architect and Team Leader for a 7-person team across 4 deployments.

.NET System Architecture Real Time Systems Team Leadership

.NET / Android Developer

Winify

Jan 2008 - Dec 2014 (6 years 11 months)

Spearheaded a cross-platform payment system (Android, desktop) with Western Union integration, processing $20M in transactions across 80K users. Coordinated delivery across 4 teams as Team Leader, shipping the desktop and Western Union releases on schedule.

.NET Android Payment Systems Western Union Integration Team Leadership