Senior Backend Developer & AI Engineer (Ad‑Booking & Analytics Platform for UK Sports Clubs)
Duration: 1.5 year
Summary:- Platform automates the end-to-end processes of a retail media network, from inventory management through to invoicing
- It serves the AdTech domain by providing analytics and booking solutions for UK sports clubs
Responsibilities:- Built an internal RAG assistant (LangChain + PostgreSQL/pgvector) for semantic search over Confluence documentation, reducing internal support load.
- Engineered a footfall analytics engine that processed millions of rows via CSV; eliminated 109k redundant DB queries per media order, slashing calculation latency by 92% (from 600s to <40s).
- Designed multi-tenant SSO supporting Azure AD and Okta, later migrating to AWS Cognito with automated provider onboarding and role synchronization.
- Built XLSX bulk-import framework supporting 10k+ rows per upload with validation and background processing.
- Modularized legacy backend by introducing Repository and Service layers, removing 8k-line views and cutting N+1 queries by ~90%.
Technologies: Django, Django REST Framework, LangChain, PostgreSQL, pgvector, Celery, Pandas, AWS, Azure AD, Docker
Senior Full Stack Developer | Mobile Developer (Blockchain web and mobile application)
Duration: 2 years
Summary:- A Web3 insights platform helping users explore 23,000+ crypto tokens and discover top investment opportunities
- Designed for scale and speed, serving 150k+ users with real-time crypto content in the Blockchain and Education domains
Responsibilities:- Built Udemy style learning hub (courses, notes, progress, comments) used by 5k+ learners; average session length +27 %.
- Rolled out custom referral engine (SolanaPay & Wise payouts) powering 15 % MoM growth without third-party SaaS fees.
- Delivered responsive Web + React Native apps including dark-mode system & crypto-price charting (3 rewrites → 60 FPS UI).
- Improved Lighthouse Performance score from 42 to 92 by Next.js optimization (SSR caching, image & font loading).
Technologies: React Native, React, Django, Next.js, AWS, PostgreSQL, Docker
Full Stack Developer (Auction Application)
Duration: 1 year
Summary:- The SaaS application for auction companies, software customized for different clients
- An active and promising start-up, which won several start-up cups, operating in the E-commerce domain
Responsibilities:- Delivered 30+ custom PDF report generators adopted by 50+ enterprise clients, automating audit-grade exports and strengthening account retention.
- Implemented Vue-based dashboard & data-tables; reduced page load time from 1.8 s to 0.7 s.
Technologies: Django, Vue.js, DRF, MongoDB, Docker, PostgreSQL, MySQL
Full Stack Developer (Chat Contact Center)
Duration: 1 year
Summary:- A microservices-based chat platform connecting builders, customers, and companies
- Enables structured conversations via templates, multi-channel management, and integration with the GC marketplace for goods and services in the Software and Hi-Tech Communication domain
Responsibilities:- Re-architected chat backend: unified Twilio integration behind a WebSocket relay, slashing duplicate code by 40% and cutting chat-related incident tickets by half.
- Extended automated test suite to 150+ pytest cases covering the vast majority of SLA-critical flows; enabled weekly releases with less than 1% rollback rate.
- Product support and documentation, maintenance, refactoring, writing tests, etc.
Technologies: Flask, React, PostgreSQL, MongoDB, SQLAlchemy, Pytest, Redux, Docker
Upstaffer since May, 2026
