Daniel is available for hire
Hire DanielDaniel Molitor
Verified Expert in Engineering
JavaScript Developer
Austin, TX, United States
Toptal member since March 23, 2022
Bio
Dan attended Hack Reactor for software engineering in 2016. Since then, he has worked with some of the largest technology companies in the world, such as Blackboard and Apple, and several notable startups. He loves to solve interesting problems and mentor younger developers. His main expertise is in front-end development, using React, although he is very comfortable working in full-stack environments.
Portfolio
Talkmap
React, CSS, SCSS, PostgreSQL, NestJS, Express.js, D3.js, TypeScript, Cypress...
Apple
React, Styled-components, GraphQL, Jest, TypeScript, JavaScript, WCAG 2
Shep Travel
MySQL, Sequelize, React, Node.js, Express.js, Regex, Material UI...
Experience
- JavaScript - 8 years
- Node.js - 7 years
- React - 7 years
- WCAG 2 - 6 years
- Cypress - 4 years
- PostgreSQL - 4 years
- Go - 3 years
- Agentic AI - 2 years
Preferred Environment
React, SCSS, Node.js, Agentic AI, Agentic Frameworks, Go, ClickHouse, JavaScript, Amazon Web Services (AWS), TypeScript
The most amazing...
...and fulfilling opportunity in my career was mentoring teams of developers on the fundamentals and best practices of React.
Work Experience
Senior Software Engineer
2020 - PRESENT
Talkmap
- Architected an AI analysis pipeline integrating multiple LLM providers (OpenAI and Anthropic) with structured output parsing, error handling, rate limiting, and cost management to extract insights from enterprise conversation data at scale.
- Built a multi-model orchestration layer with routing and fallback across providers, optimizing cost, latency, and output quality with configurable model selection per task—enabling rapid experimentation with new models.
- Implemented streaming inference via WebSockets for real-time AI-powered analysis, delivering sub-second first-token latency to production users.
- Led the migration of a Django back end and Kafka consumer to Go, eliminating 64 instances and dramatically improving throughput while reducing infrastructure costs.
- Built a high-performance distributed data pipeline (PostgreSQL, ClickHouse, and Kafka) feeding both analytical queries and LLM processing stages at enterprise scale.
- Shipped production React and TypeScript UI with real-time streaming, complex state management, and comprehensive test coverage, and designed JWT and Okta authentication with role-based access control.
Technologies: React, CSS, SCSS, PostgreSQL, NestJS, Express.js, D3.js, TypeScript, Cypress, Docker, Kubernetes, Tailwind CSS, ClickHouse, Go, Apache Kafka, Agentic AI, Agentic Frameworks, Socket.IO, React Query, JavaScript, Redux, WCAG 2, React Router, MongoDB
Web Developer
2019 - 2020
Apple
- Built key UI features for Radar (internal developer tool for bug tracking) using React and Styled-Components.
- Adhered to accessibility best practices in line with WCAG standards.
- Crafted and implemented various GraphQL queries and mutations.
- Followed strict TDD via Jest and React Testing Library.
Technologies: React, Styled-components, GraphQL, Jest, TypeScript, JavaScript, WCAG 2
Software Engineer
2017 - 2019
Shep Travel
- Designed a creative solution to capture booking data from sites using a custom Regex formula.
- Built a front-end dashboard for company administrators using React, React Router, Material-UI, and SCSS.
- Rebuilt an extension UI based off of designer requirements using React.
- Built out the back-end API and database with Node.js, Express.js, MySQL, and Sequelize.
Technologies: MySQL, Sequelize, React, Node.js, Express.js, Regex, Material UI, Chrome Extensions, React Router, TypeScript, JavaScript, Amazon Web Services (AWS), Redux, MongoDB
Software Engineer
2017 - 2017
Blackboard
- Assisted in facilitating the ‘Get Well’ initiative by instructing teams on the fundamentals of React.
- Served as the main engineer on the Blackboard UI Toolkit project, a React component library.
- Created the front-end user interface with React and engineered front-end logic for various modules, including institution pages, attendance, and assessments.
Technologies: React, SCSS, CSS, JavaScript
Experience
Forme
https://www.formepdf.comForme is a developer-first PDF generation platform built on a Rust engine that compiles to WebAssembly. Templates are written as JSX components, following the same model as React, and the engine handles layout, pagination, font embedding, and PDF generation entirely in WASM. It eliminates the need for headless Chrome and native binaries, avoiding cold-start issues, and runs seamlessly in Node.js, Cloudflare Workers, Vercel Edge, and the browser.
AnomiQA
Solo-built an autonomous testing system that maps a web app, explores it through persona-driven runs, and finds the emergent, unspecified bugs that scripted test suites miss - the kind of defects that ship to production because nobody thought to write a test for them. In its first real engagement, AnomiQA found deploy-blocking bugs that a 3,400-test suite had missed, on a product its solo founder was about to ship.
Built with TypeScript, Playwright, and Anthropic's Claude (Haiku + Sonnet), the architecture combines deterministic structural detection with LLM-driven behavioral exploration, layered against a persistent semantic model of the product that compounds across runs.
Built with TypeScript, Playwright, and Anthropic's Claude (Haiku + Sonnet), the architecture combines deterministic structural detection with LLM-driven behavioral exploration, layered against a persistent semantic model of the product that compounds across runs.
Microservice Manager
A desktop application for orchestrating local microservice development environments, built with Go (Wails) and React/TypeScript. Engineers define their stack - services, databases, Docker containers, and the connections between them - and the app boots everything in dependency order, replacing the typical tangle of terminal tabs and bash scripts.
Core features include a live interactive service graph (React Flow), topological boot ordering with parallelism, transparent reverse proxies for API request/response tracing without service instrumentation, unified log streaming, environment variable management, file watching with auto-rebuild, and Docker container lifecycle management. Architecture configs export as portable JSON for team sharing, with auto-detection that scans for package.json, go.mod, Cargo.toml, and Dockerfiles to infer service types, commands, and ports automatically.
Tech stack: Go back end (Wails framework), React/TypeScript front end, Docker SDK, shadcn/ui, fsnotify-based file watcher.
Core features include a live interactive service graph (React Flow), topological boot ordering with parallelism, transparent reverse proxies for API request/response tracing without service instrumentation, unified log streaming, environment variable management, file watching with auto-rebuild, and Docker container lifecycle management. Architecture configs export as portable JSON for team sharing, with auto-detection that scans for package.json, go.mod, Cargo.toml, and Dockerfiles to infer service types, commands, and ports automatically.
Tech stack: Go back end (Wails framework), React/TypeScript front end, Docker SDK, shadcn/ui, fsnotify-based file watcher.
Skills
Libraries/APIs
React, Node.js, React Query, Socket.IO, D3.js, React Router, Claude API, Playwright, React Flow
Tools
Sequelize, Claude Code
Languages
JavaScript, GraphQL, CSS, TypeScript, Go, SCSS, Regex, TypeScript 5, Rust, Python
Frameworks
Redux, Agentic Frameworks, NestJS, Express.js, Tailwind CSS, Cypress, Jest, Material UI
Platforms
Docker, Kubernetes, Apache Kafka, Vercel, Amazon Web Services (AWS)
Storage
PostgreSQL, MongoDB, ClickHouse, MySQL, Amazon S3 (AWS S3)
Paradigms
Microservices
Other
Agentic AI, WCAG 2, Styled-components, Chrome Extensions, Accessible Rich Internet Applications (ARIA), Vite, Railway, DNS, Wails
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