Looking for a job

David njoagwuani

@davidnjoagwuani

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I build production backend and AI platforms with Python, FastAPI, AWS, and scalable data pipelines.

Nigeria

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What I'm looking for

I'm looking to build production backend, data, and AI systems where I can own services end to end—from API design and pipelines to deployment, monitoring, and reliable operations.

I'm currently building ML and agentic AI platforms at Davu.ai (CentricOS), where I created a FastAPI-based AI agent that runs feature engineering, trains supervised models, and assembles workflows using LangGraph, OpenAI, RAG, and pgvector.

I designed the supporting ETL and model-training platform to ingest CSV, Excel, and SQL data, process customer datasets with Pandas, and train scikit-learn models. I also deployed FastAPI microservices to AWS EKS and implemented observability with Prometheus, Grafana, Loki, and Sentry.

At SunFi, I led backend engineering for a clean-energy financing product. My recommendation system increased average order value by 20%, while PostgreSQL and Django ORM improvements cut core endpoint query response time by 60%.

Across fintech, cryptocurrency, e-gaming, and affiliate marketing products, I've owned APIs, payment pipelines, deployments, testing, and monitoring. I enjoy building reliable systems end to end, mentoring developers, and making complex backend workflows easier to operate.

Experience

Work history, roles, and key accomplishments

Current

Backend/ML Engineer

Current

Davu.ai (CentricOS)

Apr 2024 - Present (2 years 5 months)

Built an AI agent inside a FastAPI service using LangGraph and OpenAI for feature engineering and model training, with RAG over pgvector. Designed ETL and model-training platform, deployed microservices to AWS EKS, and set up monitoring with Prometheus, Grafana, and Loki.

Python fastAPI LangGraph Lang Chain OpenAI Pgvector MongoDB PostgreSQL Redis Airflow Airbyte Docker Kubernetes Amazon EKS GCP Azure Prometheus Grafana Loki Sentry

Backend Engineer (Tech Lead)

SunFi

Mar 2022 - Apr 2024 (2 years 1 month)

Built a recommendation system for a clean-energy financing product that raised average order value by 20%. Redesigned PostgreSQL models to cut query response time by 60%, automated deployments, and led code reviews and mentoring.

Python Django PostgreSQL Redis Celery Docker Jenkins AWS Sentry

Full-Stack Developer

FusPay

Jan 2020 - Feb 2022 (2 years 1 month)

Built an interoperable cryptocurrency wallet system supporting cross-border transfers and utility purchases. Introduced RabbitMQ for messaging, automated deployments with CircleCI, and designed REST APIs with Django REST Framework.

Python Django PostgreSQL RabbitMQ React Vue.Js Docker Nginx AWS CircleCi Rollbar

Python Engineer

Correttezza Technologies

Jan 2018 - Nov 2019 (1 year 10 months)

Built a peer-to-peer e-gaming platform with sports prediction, pool games, and a live leaderboard. Used APScheduler to track game times and refresh leaderboard standings.

Python Django Vue.Js PostgreSQL AWS APScheduler