Boris Petrov | Product Engineer, building with AI

2026·Moving into applied AI

Building-products sales agency

Oct 2026

Spec scanner, a small proof of concept

A web app that scans 1,000+ page construction specs for everything the agency's product lines could bid on, citing the page and the specified manufacturer for each find
Each scan is a Claude Code session that plans its own reading of the spec (e.g. splitting it across parallel sub-agents) and saves its results through the app's MCP tools in a fixed format

Claude Code
MCP
Python
FastAPI

Bitquark

Aug-Oct 2026

Pre-launch macOS productivity app

Audited the app's UX with the founder, prototyped several options for each design question, and laid out the trade-offs
Built the chosen designs in Flutter/Dart, a stack new to me, including search across mail and notes and macOS window focus behavior
Directed coding agents throughout and owned the correctness of the code

Flutter
Dart
Claude Code

bitquark.ai

Play Jumbo

Jun-Aug 2026

Pre-launch live sports trivia and prediction app

Prototyped LLM generation of trivia and prediction questions during live games
Prototyped a replay simulator that ran a recorded Super Bowl through the generator play by play, to surface the first failure modes (e.g. 29% near-duplicate mini-games in one run)
Wrote up the failure modes, costs, and data needed, and handed it all to the in-house engineers

Claude API
Python
Django
React Native

playjumbo.com

AI Engineering Bootcamp

Jun-Aug 2026

Eight-week course taught by Aurimas Griciūnas, founder of SwirlAI

Hybrid RAG (dense + BM25, reranking) with retrieval evals, then a LangGraph agent with MCP tools
Capstone: a hand-labeling tool for LLM-generated questions, and a test of whether an LLM judge could replace the labels

RAG
LangGraph
MCP
LLM-as-judge

My takeaways (LinkedIn)

Selected product engineering work

Radical Tempo

15 months

AI-augmented video publishing platform

React
Next.js
TypeScript
Supabase
React Query
Tailwind

radicaltempo.com Walkthrough video

Second engineer hired, from zero to early-access launch
Multi-phase pipeline state: transcoding, AI generation, rendering, each with its own progress and failure modes
Layered data fetching: server components, React Query caching, Supabase Realtime
Cross-platform publish form: one view serving 8 platform types with per-platform validation and field constraints
Design collaboration on AI-augmented workflows with few established patterns

California Pizza Kitchen

22 months

Restaurant chain website and ordering system

React
Flow
Sanity CMS
Azure
Docker
Kubernetes

cpk.com

Led team of 3 across frontend, CMS, and backend
Inherited and stabilized a codebase left broken by the previous agency
SEO boost via programmatically generated location pages (100+) and CMS-powered menu pages
System of smart redirects/deep-links to ordering platform, preserving loyalty session
25% homepage load time reduction; CMS storage and bandwidth optimization
WCAG accessibility and GDPR/CCPA cookie compliance

Navii

1 month

AI assistant for career development

React
TypeScript
Next.js
React Query
Tailwind

heynavii.ai

Brought on for urgent stabilization of agent-built frontend weeks before launch
Issues with React component lifecycle, global state management, caching
Audited, advised, then implemented highest-impact fixes under tight deadline
Laid guardrails for post-launch changes

Also worked with

Lasso Labs5 months · React, Highcharts, Wagmi

Rising Stars AI7 months · Next.js, React Native, Expo

SpeakEasy4 months · React, Rails, TypeScript

Engineered Tax Services5 months · Next.js, React, TypeScript

Subcity2 months · React, Rails, Postgres

Mirror2 weeks · React, Next.js, Chakra

Some client work is under NDA or behind logins.

When teams bring me in

Inflection point

Approaching a launch, fundraise, or growth spike and need extra muscle to get it over the line.

Expertise gap

Need a senior engineer but not sure it's a full-time role – or not sure yet how long the need lasts.

Parallel workstream

Core team is heads-down on roadmap while a new initiative (experimental, time-sensitive) needs to progress.

Testimonials

He brought a level of craft to everything he built… had a strong partnership with our designer, which made a huge difference in what we were able to ship… reliable as hell when it comes to hitting deadlines.

Ravi KolluriCofounder & CTO, Radical Tempo

Boris’s super power is that he looks beyond the technical and grasps the business objective… It’s rare to find a technologist who can push and pull at a business level to deliver results in the form of revenue.

David HarrisDirector of Ecommerce and Digital Marketing, California Pizza Kitchen

He always goes above and beyond to assess the clients’ needs and flag any potential roadblocks early on… Boris excels as a team lead and manager, ensuring that the team is well-equipped for any project and capable of overcoming any challenge.

Alexz GravesSr. Creative Producer, Planetary

…a great problem solver… He presents his way as an option to consider and seeks input from others on pros and cons… He spends time trying to understand the problem and having empathy for the user.

Ajoy BhambaniFounder, Rising Stars AI

I’ve worked with Boris on multiple occasions with different budget, timing, and expertise requirements, and every time, Boris has been able to deliver high quality work… His communication skills regarding estimates, technical tradeoffs, and user requirements are top notch.

Molly NaceyFractional CTO/CPO

…holds a very high bar for quality… has earned trust with the team as someone who can work independently with PMs, UX and TPMs to figure out the goals, requirements, risks and schedule for a project and then successfully execute.

Chris BeeEngineering Manager, ex‑Amazon/Zillow/Uber