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I'm Nikolay Petkov, a Senior Full Stack Developer who built and scaled a fintech platform from pre-seed to Series B, culminating in an acquisition. I own end-to-end system design, cloud infrastructure, and production reliability, with 10+ years of experience across TypeScript, React, Node.js, and AWS. I thrive on shipping robust features, leading cross-functional teams, and obsessing over data integrity and fault tolerance. I enjoy mentoring junior engineers and designing resilient architectures that scale to tens of millions of dollars in transactions and 24/7 operations.…I'm Nikolay Petkov, a Senior Full Stack Developer who built and scaled a fintech platform from pre-seed to Series B, culminating in an acquisition. I own end-to-end system design, cloud infrastructure, and production reliability, with 10+ years of experience across TypeScript, React, Node.js, and AWS. I thrive on shipping robust features, leading cross-functional teams, and obsessing over data integrity and fault tolerance. I enjoy mentoring junior engineers and designing resilient architectures that scale to tens of millions of dollars in transactions and 24/7 operations.

Nikolay Petkov

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

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I'm Nikolay Petkov, a Senior Full Stack Developer who built and scaled a fintech platform from pre-seed to Series B, culminating in an acquisition. I own end-to-end system design, cloud infrastructure, and production reliability, with 10+ years of experience across TypeScript, React, Node.js, and AWS. I thrive on shipping robust features, leading cross-functional teams, and obsessing over data integrity and fault tolerance. I enjoy mentoring junior engineers and designing resilient architectures that scale to tens of millions of dollars in transactions and 24/7 operations.…I'm Nikolay Petkov, a Senior Full Stack Developer who built and scaled a fintech platform from pre-seed to Series B, culminating in an acquisition. I own end-to-end system design, cloud infrastructure, and production reliability, with 10+ years of experience across TypeScript, React, Node.js, and AWS. I thrive on shipping robust features, leading cross-functional teams, and obsessing over data integrity and fault tolerance. I enjoy mentoring junior engineers and designing resilient architectures that scale to tens of millions of dollars in transactions and 24/7 operations.

Available to hire

I’m Nikolay Petkov, a Senior Full Stack Developer who built and scaled a fintech platform from pre-seed to Series B, culminating in an acquisition. I own end-to-end system design, cloud infrastructure, and production reliability, with 10+ years of experience across TypeScript, React, Node.js, and AWS.

I thrive on shipping robust features, leading cross-functional teams, and obsessing over data integrity and fault tolerance. I enjoy mentoring junior engineers and designing resilient architectures that scale to tens of millions of dollars in transactions and 24/7 operations.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

Bulgarian

Fluent

English

Advanced

German

Beginner

Work Experience

Senior Full Stack Developer at Candor

September 1, 2021 - Present

Owned end-to-end delivery of core platform features, including system design, API contracts, implementation, cloud deployment, and long-term maintenance. Built a highly available trading platform handling $50M+ in transactions with strong production reliability. Migrated AWS infrastructure to Infrastructure as Code using CloudFormation, improving deployment reliability and disaster recovery. Served as on-call engineer on a rotating basis and drove post-incident improvements.

Senior Full Stack Developer at Independent / Freelance

August 1, 2018 - September 1, 2021

Contributed to multiple client projects across fintech, automotive, and cybersecurity domains, progressing from feature implementation to technical leadership; led architecture discussions and mentored junior developers.

Front-end / Full Stack Developer at Self-employed (Sofia)

November 1, 2016 - August 1, 2018

Frontend/Full Stack role contributing to a customizable frontend platform deployed across 10+ international markets; led frontend feature development and performance optimizations.

QA Engineer

May 1, 2015 - August 1, 2016

Contributed to QA team growth (2 → 10+ engineers) by training new testers and standardizing testing workflows for the studio's first major release.