Hossein (Nick) Babaei

US (Remote) · Agentic workflows platform for unstructured data processing · 11-month Toptal assignment

• Delivered production features across a Python/FastAPI backend and React/TypeScript frontend, including data-view, runs-view, PDF viewer, SSO, tag-scoping, and worker/reviewer workflows.
• Implemented Kubb-based TypeScript code generation from FastAPI OpenAPI specs — a 1-minute script replaced manual type hunting across the frontend, cutting developer time on type-sync work by ~60% and shifting contract errors to compile-time rather than runtime.
• Stack: Python, FastAPI, React, TypeScript, shadcn/ui, Kubb, Temporal, Supabase, LiteLLM, Tiptap.

Engagement ended when the company reduced its external contractor headcount due to financial constraints.

Python · FastAPI · React · TypeScript · shadcn/ui · Kubb · Temporal · Supabase · LiteLLM · Tiptap

UK (Remote) · helical-ai.com · Fixed-term 3-month arc.dev contract, part-time; concurrent with super.AI

• Introduced tRPC and Kubb, eliminating API contract drift between frontend and backend services.
• Delivered the multi-tab notebook interface — the most requested feature by existing customers and a prerequisite for the company’s investor pitch; resolved a long-standing UX gap that had been a friction point in every customer conversation.
• Identified and resolved critical security vulnerabilities ahead of a scheduled penetration test.

TypeScript · tRPC · Kubb · React

Netherlands (Remote)

• Introduced React Compiler with no migration overhead, improving frontend runtime performance by 42% across the product.
• Integrated Kubb for automated TypeScript codegen from OpenAPI specs, eliminating all manual type maintenance.
• Designed monorepo architecture unifying 5 separate products under shared packages — eliminated the publish-to-test cycle that previously made cross-product core updates a cascade of breakages, reducing inter-package publish overhead by ~70% and making dependency upgrades safe and immediate.
• Built an internal RAG-based AI assistant for private knowledge retrieval and experimentation.
• Led the existing team through an architectural uplift — establishing code-review standards, CI/CD practices, and mentoring engineers to work efficiently within the new monorepo structure.

External Technical Lead engagement concluded after delivery of the planned architecture, workflow improvements, and team uplift.

TypeScript · React · Python · Material-UI (MUI) · PostgreSQL · Vite

Netherlands (Remote) · GrandVision European e-commerce platform

• Integrated Optimizely A/B testing workflows, contributing to a 24% revenue increase on the GrandVision e-commerce platform.
• Implemented OneTrust cookie consent for GDPR compliance across multiple European storefronts.
• Migrated transactional email templates to MJML + React — 50% reduction in maintenance time.

Following EssilorLuxottica’s acquisition, GrandVision released 42 external engineers. PassionatePeople retained me on payroll during the bench period; I later chose to leave and pursue independent opportunities.

TypeScript · Node.js · React · Next.js · Optimizely · MJML

Netherlands · NS Railways app — highest-traffic mobile app in the Netherlands

• Built a React Native barcode-scanning camera module, reducing scan time by 65% on a high-traffic mobile app.
• Delivered a project on Microsoft Azure — Azure Functions, Cosmos DB, and Azure Storage.
• Built a route optimisation tool for field bike technicians — calculated daily routes that minimised travel time while accounting for broken, healthy, and surplus bike counts across stations, reducing unnecessary stops and improving fleet repair throughput.

React Native · JavaScript · TypeScript · Azure Functions · Cosmos DB · Azure Storage

Tehran, Iran

• Built an internal code generator adopted org-wide — 400% increase in team throughput.
• Delivered a DApp proof-of-concept for blockchain-based payment flows using Web3.js and Ethereum smart contracts.

TypeScript · React · Web3.js · Ethereum

Tehran, Iran

• Full-stack delivery across insurance, clinical, and internal tooling domains.
• Built a CLI tool that improved project velocity by 300% across engineering teams.

JavaScript · TypeScript · React · Node.js

Tehran, Iran

• Built a modularised SPA admin panel using AngularJS, Sass, and Grunt.

JavaScript · AngularJS · Sass · Grunt

Tehran, Iran

• Developed a web-based BPMN editor as an ERP module; built frontend components for multiple ERP modules.

JavaScript · jQuery · Raphael.js