Open to opportunities

Daria Bykova

@dariabykova

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Full-stack developer building React and Python product features and LLM-powered pipelines end-to-end.

Brazil

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What I'm looking for

I’m looking for a full-stack or frontend role on a product team where I can ship end-to-end features—especially React/Python apps—and build reliable AI integrations with validation and QA.

I’ve built and maintained production web apps used daily by dental clinics at 3D Predict (healthcare SaaS, US), pairing React on the frontend with Python on the backend and debugging issues using logs, SQL, and analytics.

For the past year, I’ve designed, built, and launched independent projects end-to-end, including a Next.js events platform with SSR and SEO (dynamic meta tags, sitemap.xml, JSON-LD), plus an automated LLM content pipeline that includes output validation after catching hallucinated event details.

I also created an LLM content generation system (FastAPI + React) with prompt layering, quality gates, live preview, and Playwright-based export, and I built a document extraction pipeline using locally-run models with a validation layer to avoid fabricated fields.

Experience

Work history, roles, and key accomplishments

Independent Full-Stack Developer

Self-Employed

Jan 2025 - Jan 2026 (1 year)

Built and launched independent projects including a Next.js events platform with automated LLM content pipeline, an LLM content generation system, and a document extraction pipeline on locally-run models.

React Next.js TypeScript fastAPI Python OpenAI Anthropic Gemini Prompt Design Playwright Docker AWS N8n

Full-Stack Developer & Team Lead

3D Predict

Jan 2022 - Jan 2025 (3 years)

Developed and maintained frontend (React) and backend (Python) of a production healthcare SaaS application used by dental clinics. Coordinated a small dev team, conducted code reviews, and shipped features based on user feedback.

React Python SQL Hotjar Matomo Code Review Team Leadership

Frontend Developer

3D Smile

Jan 2021 - Jan 2022 (1 year)

Maintained and improved a production React application in a medical context, refactored legacy modules, integrated third-party APIs, and improved performance.

React Performance Optimization API Integration

Frontend Developer

Freelance

Jan 2018 - Jan 2021 (3 years)

Built React-based websites and web applications for small businesses and non-profits, handling client communication, delivery, deployment, and maintenance.

React Web Development Client Communication