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Vaishali Singh

Python · FastAPI · React · Supabase · PostgreSQL · Gemini API · Docker | AI / Full-Stack Engineer

Location:London, England, United Kingdom (London, United Kingdom)
Timezone:Europe/London
Experience:5 Years
Direct Rate
$45–$95/ hour (USD)
Available for Projects

No middleman platform markups. Direct contact.

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About & Engineering Approach

Full-stack and AI engineer with a master's degree from Queen Mary University of London. Builds and launches production services from scratch: designed and released the pdfexy.com platform on FastAPI, React, Supabase (PostgreSQL), and Vercel. At Varua Transport built a scalable fleet-management system with a REST API, an LLM interface for natural-language queries, and real-time dashboards connected to Supabase.

Core Technologies & Competencies

Primary Specializations

Supabase

All Technologies & Tools

Supabase
PostgreSQL
Row Level Security
Auth
Storage
Python
Fastapi
Flask
Rest Apis
React
TypeScript
Real Time Dashboards
Docker
Github Actions Cicd
Vercel
Langchain
Rag Systems
Faiss
Vector Search

Commercial Experience

Founder & AI Engineer @ pdfexy.com (Self-employed)

2026-03-01 — Present

Architected and launched the platform: FastAPI backend, React frontend, cloud Supabase database, client-side file processing.

AI & Full Stack Engineer @ Varua Transport Pvt. Ltd.

2024-09-01 — 2026-06-01

Developed backend infrastructure, integrated generative AI APIs, and built CI/CD plus React dashboards with Supabase.

Selected Portfolio & Deliverables

SaaSProductivity

Pdfexy Document Platform

PDF-processing platform on FastAPI and React with Supabase PostgreSQL serving 48K users and converting 120K files per month.

supabase
fastapi
react
vercel
DashboardLogistics

Fleet Management Dashboard

Fleet-management system with 1.4K vehicles, realtime dashboards, and natural-language LLM queries that cut downtime by 27%.

supabase
python
react
docker
AI ProductCustomer Support

RAG Support Assistant

RAG assistant on LangChain and pgvector with 92% accurate answers over 85K documents and 380 ms search.

supabase
langchain
faiss
typescript

Vetting Standards

Verified
Identity & Commercial Track RecordVerified past employment and client references.
Code
Code & Architecture AuditAssessed on production code standards and type safety.
Security
Direct Contract SupportNo platform lock-in. Work directly with clear terms.

Languages

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