Joshua Coleman

Delivered work

TradeSniper

For roughly 17 months I was the sole engineer on TradeSniper — a production algorithmic crypto-trading platform — carrying it single-handedly from a single-exchange utility through three ground-up architectural generations into a multi-exchange automated system. One engagement, a scope normally split across a whole engineering team. The pieces I owned end to end:

• Full-stack application

  Designed and built the platform front to back — React UI, Python/Flask back end — around a ports-and-adapters exchange layer, so each new exchange plugs in as an adapter against a stable internal contract without touching the engine core.

  React · Python / Flask · SQLite / Parquet · TradingView charts · CCXT / Blofin

• Quant & ML signal system

  Developed the platform's original quantitative signal — its core intellectual product — in production generating profitable manual-entry signals for live users, plus a machine-learning entry-logic system I was building toward automated entry.

  original algorithm · ML entry logic · backtest-vs-live discipline

• Server & infrastructure

  Ran production infrastructure across multiple VPS domains: a Stripe integration that auto-linked payment transactions to customer accounts by email — with an admin path to hand-link the ones that didn't match — plus a custom authentication and account-management backend, a signal-rebroadcast relay, and platform security.

  multi-domain VPS · Stripe · custom auth · DevOps

• Communications platform

  Stood up and maintained a self-hosted Matrix / Cinny communications platform with custom logic and authentication — built and migrated end to end.

  self-hosted Matrix / Cinny · custom auth

• Integration & hardware

  Built and provisioned a fleet of turnkey Lubuntu mini-PC units — and reverse-engineered the vendor's front-panel display utility with Ghidra (a license-permitted decompile) to drive custom live data on hardware that wasn't meant to be programmable.

  Lubuntu mini-PC fleet · Ghidra

• Support & customer ops

  Sole technical point of contact for the platform and adjacent services, with white-glove support for high-tier customers — backed by a support-operations console (ticketing, billing, moderation, tier/room management) I built from scratch.

  custom support console · ticketing / billing / moderation

Projects

Ongoing builds

Systems I’m building on my own — hubs that grow as the work does. How I design under hard constraints and reduce many apparent systems to one primitive.

Studies

One-off demonstrations

Single finished pieces, each showing one capability on a real thing — turning a vague vision into a buildable spec, or reverse-engineering a broken system from its output alone.