Full-Stack Engineer · Founder of VARJIX · Luanda, Angola 🇦🇴
Open to full-time, part-time & contract — 100% remote or relocation
I engineer trading infrastructure — end to end, in production, solo.
I'm João Kwanza. I design, build and operate trading infrastructure — the "Shopify for trading platforms" — where anyone launches and fully self-manages a complete, branded trading business in ~30 seconds. Real-time trading engines, double-entry ledgers, multi-chain crypto payments, and autonomous AI agents that run the business 24/7. Built and operated solo.
What I've built — live, in production, today
107live operator platforms
817registered traders
~590live broker connections
21public API endpoints
18MCP tools for AI agents
45+AI-produced documentaries
VARJIX (varjix.com) — trading infrastructure, the "Shopify for trading platforms," designed, built and operated by me alone. Operators launch, manage and fully control their own trading business — 100% self-service, no support tickets:
- Multiple complete platform templates — each a full production trading app (real-time charts, live order execution, wallets, copy-trading, community feed, live chat, marketplace, a no-code bot builder and autonomous AI trading agents)
- Operators self-serve in ~30 seconds: brand it, connect their own broker token to earn markup, buy & attach a custom domain in one click
- Financial core: double-entry ledger, real-time revenue capture, and multi-chain crypto settlement (USDT on Tron/TRC-20 + more) with per-user HD wallets and on-chain listeners — no third-party processor
- Public API (21 endpoints) + an 18-tool MCP server so AI agents operate the platform end-to-end, plus many internal service APIs
- VÍRA — an autonomous AI agent live 24/7 on WhatsApp, Telegram, the website and partner dashboards: finds and negotiates with partners, answers questions, and auto-publishes SEO/AI-search-optimized content. The whole business runs itself.
VARJIX Studio — an autonomous AI system that researches, scripts, voices, edits, quality-checks and publishes documentary video across 8 YouTube channels with no human in the loop.
Stack: TypeScript · Node.js · React/Next.js · PostgreSQL · WebSockets · USDT/TRC-20 · Broker APIs (Deriv, Binance) · LLM orchestration (Gemini, Claude) · Remotion · Linux/nginx/PM2 · Bonus: 4th-year Accounting & Finance student — I read balance sheets as fluently as stack traces.
Full CV (PDF) →
Email me
How I build
I own systems end to end — architecture, code, deployment, and the incident at 3am. Everything I ship runs in production with real users and real money, so correctness is not optional: double-entry ledgers that reconcile to the cent, payment rails that never drop a transaction, infrastructure that self-heals under load.
AI-first and autonomous by default — I build systems that run, grow and defend themselves with no human in the loop.
One engineer, full stack, from database schema to deployed product to the AI agents that operate it. If your team builds real systems at this level, let's talk.
What I'm building
It started with Titan System, the trading platform I coded and ran myself in 2023 — bankroll management, discipline and automation, ~120 traders and paying subscribers. Then I realised the real opportunity wasn't owning one platform; it was letting anyone own theirs. That became VARJIX.
VARJIX is trading infrastructure — the "Shopify for trading platforms." Anyone launches their own fully-branded trading business in ~30 seconds: no code, no broker licence, free to start, earning a share of the markup — and runs it entirely self-service. Growth, outreach and support are handled by VÍRA and internal AI agents, 24/7.
My vision: millions across Africa, LATAM and Asia owning their own trading businesses — wealth that circulates locally and lifts whole communities.
See VARJIX →
Affiliate Program — earn referring →