Hey! I'm Yoav, based in Tel Aviv.

Full-stack engineer with a frontend edge, building with AI.

I've built a real-time web app for production users at Cogniteam, and since 2023 I've designed and shipped my own products end to end: architecture, frontend, backend and deployment.

Looking for a full-stack or AI engineer? Let's talk.

Let's talk Download CV

I reply within one business day.

let's work together

2023 – present
Full-stack Developer
Self-employed
2022 – 2023
Full-stack Developer
Cogniteam (Nimbus)
2017 – 2020
B.Sc. Mathematics & Computer Science
Ariel University

What I do

From the database to the details people notice.

Full-stack

Build features your team can maintain

React, TypeScript and Node.js, from the database to the UI. At Cogniteam I refactored legacy code to reduce technical debt and built reusable components that set design patterns across the product.

React, Next.js, TypeScript, Redux
Node.js, Python, FastAPI, gRPC
MongoDB, SQL, Supabase, Convex

Frontend

Interfaces that feel polished

Reusable components, design systems and motion. The face at the top of this page runs on a WebGL engine I built in TypeScript.

MUI, Styled-Components, Tailwind
Component libraries
WebGL and motion

LLM pipelines you can measure

Multi-stage LLM pipelines with structured outputs, guardrails and human-in-the-loop review, on the OpenAI and Anthropic APIs. I back them with evaluation suites that track quality, latency and cost, from report accuracy to speech-to-text error rates.

OpenAI & Anthropic APIs, LangChain
Structured outputs, evals, guardrails
Whisper and speech-to-text (WER/CER)

Selected projects

What I have built lately.

AI review intelligence
GapHunter
A multi-stage LLM pipeline that classifies app reviews and writes evidence-backed reports with source-linked citations, refined by a critic pass. Backed by a 32-app evaluation suite that runs in GitHub Actions.
Next.js, TypeScript, Convex, OpenAI API, LangChain
AI transcription platform
Transcripter
Async speech-to-text with audio chunking, word-level timestamps and editable transcripts. An evaluation framework compares OpenAI, Deepgram, AssemblyAI and Speechmatics on WER/CER, latency and cost against human-approved transcripts.
Next.js, TypeScript, Supabase, OpenAI Whisper
LLM strategy assistant
Trading Research Platform
Turns natural-language requests into strategy specs with versioned prompts, JSON Schema outputs, validation, corrective retries and human approval. Includes prompt caching, token tracking, rate limits and per-request audit trails.
Python, FastAPI, Anthropic Claude API

Freelance

Need a website for your business?

I also design and build premium custom websites, with motion and personality.

See a recent client site Tell me about your business

Contact

Hiring? Let's talk.

Tell me about the role and the team. A few lines are enough. I reply within one business day.

YoavHevroni1@gmail.com

Full-stack engineer with a frontend edge, building with AI.

Experience