Open to opportunities

Johnson Nifemi

@johnsonnifemi

Message

I build agentic AI and financial products with Rust and TypeScript.

Nigeria

Message

What I'm looking for

I'm looking to build agentic systems and data-intensive financial products, applying Rust, TypeScript, Python, and Go to production workflows, market-data infrastructure, and AI-powered user experiences.

I've built MCP-enabled market-research automations at DeepVue, turning natural-language screening and market-monitoring tasks into scheduled workflows, watchlist intelligence, and research digests.

I'm building Tradstry, an AI-powered trading journal with broker imports, performance and risk analytics, market data, rich journaling, and trade-review assistance. I architected it across a Rust Actix Web GraphQL/REST backend, Next.js and TypeScript clients, and a Go brokerage service.

I also contribute production-grade market-data infrastructure to finance-query, where I've landed eight upstream PRs spanning 250+ typed endpoints, provider tests, HTTP-session optimization, caching, parsing, and backtesting improvements. At Simmly, I'm building a prepaid food-drop marketplace across an Expo app and Rust API and worker.

Experience

Work history, roles, and key accomplishments

Current

Full-Stack Product Engineer

Current

Simmly

Jul 2026 - Present (1 month)

Building a mobile marketplace for prepaid food drops with checkout, ledger, fulfillment, and operational workflows. Developed across an Expo app and Rust API/worker.

Rust Expo Mobile Development API Development Fulfillment

Current

Open-Source Contributor

Current

finance-query

Sep 2025 - Present (11 months)

Landed eight upstream PRs including 250+ typed endpoints and 90+ provider tests. Optimized HTTP sessions, caching, and backtesting hot paths, reducing authentication requests and improving algorithm efficiency.

Rust HTTP Caching API Development Testing

Current

Founder & Full-Stack Engineer

Current

Tradstry

May 2025 - Present (1 year 3 months)

Building an AI-powered trading journal with broker imports, performance analytics, and an assistant for trade review. Architected the product across Rust, Next.js, and Go services.

Rust Actix Web GraphQL REST Next.js TypeScript Go PostgreSQL Qdrant Docker CI CD Vercel

Full-Stack Engineer, AI Team

DeepVue

Mar 2026 - Aug 2026 (5 months)

Built MCP-enabled AI workflows for natural-language screening and market monitoring. Developed watchlist intelligence and connected agent tools to screening, watchlist, market-data, and notification flows.

MCP AI Workflows Natural Language Processing Market Data Automation TypeScript Python Rust