Chidiebube Anyanwu

Fullstack & Systems Engineer

Solo-built AI cold outreach SaaS that automates lead discovery, prospect matching, and multi-step email campaigns. The backend is written in Go 1.25 with Chi and pgx connection pooling. To handle unreliable LLM providers, I designed a 4-tier fallback architecture cascading from Anthropic to Groq to OpenRouter, with an offline template generator as a final safety net. Outbound messages send directly via Gmail OAuth2 with thread continuity and rate limiting.

I own the core backend infrastructure for an enterprise vehicle liquidation platform in Lagos. Vehicle inspections produce large data payloads and compute-heavy valuation jobs, so I decoupled them from the client request loop using NestJS, BullMQ, and Redis. Built the API layer using code-first GraphQL schemas with role-based access control across inspectors, validators, and executive pricing admins.

Led web and mobile client development for an event coordination and commerce platform connecting planners, fabric vendors, and attendees. On the web side, I built the customer dashboard and storefront in Next.js using a custom lightweight CSS system. On mobile, I built the cross-platform Flutter app using Bloc for state management, cutting asset load times by 40% through responsive sizing and aggressive image caching.

Built a sports forecasting engine covering 5 major European leagues. The service runs two coordinated backends: a fast Go ingestion service that parses real-time fixture feeds and historical CSV data, and a Python worker that calculates Poisson probabilities for expected goals (xG) and betting spreads. An interactive React dashboard visualizes tiered prediction confidence.

Designed backend systems and REST APIs on contract for clients requiring high availability and low latency. Services were built in idiomatic Go with Clean Architecture boundaries, leveraging goroutines and buffered channels for asynchronous operations without external queue bloat. Maintained sub-100ms response times through query optimization on PostgreSQL.

Built backend services and data synchronization pipelines for a developer workspace platform consolidating repository status, endpoint health, and project telemetry. By profiling slow aggregation queries on MongoDB and introducing a Redis caching layer, our team reduced API response times by 40%.

Built the on-demand logistics mobile application in Flutter for couriers and customers in Lagos. Because cellular connections are frequently unstable, I implemented an offline-first upload queue that stores proof-of-delivery photos locally before retrying uploads to AWS S3. Integrated Google Maps SDK for live courier telemetry and cut app crashes by 60% with Bloc state architecture.

Built customer storefronts and checkout interfaces for an e-commerce platform using React, TypeScript, and Redux Toolkit. Cut page load times in half by code-splitting heavy routes, caching product catalogs in client state, and compressing media assets. The faster catalog filtering and smoother checkout flow increased user session engagement by 30%.