I’m a senior frontend engineer with over a decade building products at Google, Amazon, and startups. I now work independently, part-time, with startups that need high-leverage frontend execution without adding another full-time hire.

2021 — Nowborispetrov.devFreelance Software Engineer

2021 — Now

San Francisco, California, United States

Building web app user interfaces and API integrations for a variety of clients.

2025 — 2025NaviiFrontend Engineer

2025 — 2025

San Francisco, California, United States

Brought on in the month leading up to a major launch to stabilize the React/TypeScript frontend of an AI-driven career development product that had scaled rapidly through agent-assisted development. Surfaced architectural issues around state management, component lifecycle, and caching. Recommended and implemented the highest-impact fixes that could be responsibly completed before launch. Laid groundwork and guardrails for more fundamental changes to be tackled post-launch.

2024 — 2025Radical TempoFrontend Engineer

2024 — 2025

San Francisco

Built an AI-augmented web app for video content publishers (second engineer hired; went from zero to an early-access launch, with dozens of design partners and thousands of free-tier signups).

Responsibilities included:

working closely with the design team to craft cutting-edge user experiences for soliciting content suggestions from an AI assistant, evaluating those suggestions, and merging them into existing human-generated content

building publishing workflows that allow users to upload once and publish to all major video platforms with just a few clicks

orchestrating the progress of multi-phase backend processes (video transcoding, publishing, AI clip and thumbnail generation) and notifying users of outcomes

using the latest from React and NextJS – coupled with Supabase Realtime – to build a snappy, live-updating UI that allows multi-user collaboration on a shared workspace

2023 — 2025Play SFFrontend Engineer

2023 — 2025

Responsible for upkeep of Play's own website (https://play.studio) and occasionally contributing in a frontend engineering capacity to Play's external client projects.

2023 — 2024PlanetaryLead Software Engineer

2023 — 2024

Led a team of 3 engineers assigned to agency client California Pizza Kitchen's website and ordering system, across client (React, Flow Type), CMS (Sanity), and backend (Azure, Docker, Kubernetes); reduced home page load time by 25%; created smart URL redirect system to route users from the CPK-owned site to a third-party ordering platform (Olo), including persisting loyalty program login session between cpk.com and the ordering platform; reduced CMS (Sanity CMS) cost by pruning unnecessary datasets and optimizing size of images loaded on site; led effort to make site compliant with WCAG accessibility guidelines; introduced CMS-customizable, mobile-responsive menu page; audited the website for compliance with rules of the Olo API, including caching data to reduce number of API requests; improved location finder to enable users to search by various geo entities (like city, state, zip) rather than just "nearby"; created Olo API-powered, SEO-optimized page for each CPK restaurant location; revived abandoned/broken Flow-type type checking system to improve confidence when shipping new features on the client

Education

2009 — 2013

University of California, Berkeley

Bachelor of Arts - BA

2009 — 2013

Experience+

Education

Bachelor of Arts - BA