Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I'm Sergei Petrov, a Senior Full Stack Engineer specializing in building multi-tenant SaaS platforms with extensive experience in React, Supabase, and Postgres. I design secure, scalable backend systems and have hands-on experience with Stripe Connect and subscription billing. I enjoy auditing complex codebases, improving performance and privacy compliance, and collaborating with cross-functional teams to deliver production-ready software with thorough documentation.…I'm Sergei Petrov, a Senior Full Stack Engineer specializing in building multi-tenant SaaS platforms with extensive experience in React, Supabase, and Postgres. I design secure, scalable backend systems and have hands-on experience with Stripe Connect and subscription billing. I enjoy auditing complex codebases, improving performance and privacy compliance, and collaborating with cross-functional teams to deliver production-ready software with thorough documentation.

Sergei Petrov

Full Stack Developer, Back-End Developer, Front-End Developer, +2





I'm Sergei Petrov, a Senior Full Stack Engineer specializing in building multi-tenant SaaS platforms with extensive experience in React, Supabase, and Postgres. I design secure, scalable backend systems and have hands-on experience with Stripe Connect and subscription billing. I enjoy auditing complex codebases, improving performance and privacy compliance, and collaborating with cross-functional teams to deliver production-ready software with thorough documentation.…I'm Sergei Petrov, a Senior Full Stack Engineer specializing in building multi-tenant SaaS platforms with extensive experience in React, Supabase, and Postgres. I design secure, scalable backend systems and have hands-on experience with Stripe Connect and subscription billing. I enjoy auditing complex codebases, improving performance and privacy compliance, and collaborating with cross-functional teams to deliver production-ready software with thorough documentation.

Available to hire

I’m Sergei Petrov, a Senior Full Stack Engineer specializing in building multi-tenant SaaS platforms with extensive experience in React, Supabase, and Postgres. I design secure, scalable backend systems and have hands-on experience with Stripe Connect and subscription billing.

I enjoy auditing complex codebases, improving performance and privacy compliance, and collaborating with cross-functional teams to deliver production-ready software with thorough documentation.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Work Experience

Full Stack Engineer at 1Health

February 1, 2025 - December 1, 2025

Implemented row-level security in Postgres to enforce strict multi-tenant data isolation, significantly improving data privacy and compliance. Integrated Stripe Connect for subscription billing, enabling tenant-aware payment flows and centralized revenue management. Refactored AI-generated codebase to streamline backend workflows, boosting system stability.

Backend Engineer at Velte Tech

August 1, 2023 - February 1, 2025

Audited backend services to identify security vulnerabilities and applied enhancements that reduced breach risk by 40%. Developed and maintained APIs connecting React frontend with Supabase backend, improving data flow efficiency by 25%. Authored comprehensive technical documentation and handover materials for long-term maintenance. Provided architectural guidance to scale platform for thousands of active users.

Software Developer at VYAPAR

January 1, 2022 - July 1, 2023

Contributed to backend service development using Postgres with emphasis on query optimization and data integrity. Collaborated with frontend developers to integrate React components with backend APIs, enhancing user experience and responsiveness. Helped establish coding best practices and security standards aligned with SaaS compliance requirements.

Junior Developer at Kwork

April 1, 2018 - January 1, 2022

Supported junior developers in troubleshooting database and API issues, contributing to faster incident resolution. Performed unit and integration testing on backend services to ensure code quality and reliability. Participated in code reviews and sprint planning to promote agile development and knowledge sharing.