Gunars K.

Full-time freelancer — $110K+ across 154 contracts on Upwork since 2016. Most projects don't fail on strategy. They fail on execution — the job that silently stopped three days ago, the duplicate write after a restart, stale data treated as live, two events arriving out of order and corrupting state. I do integration and automation engineering: APIs, trading systems, bots, AI agents, and the infrastructure that keeps them running. I make systems that run unattended behave predictably — structured logging, reconciliation, idempotency, crash recovery — and I put a real interface on top so you see every action, change settings without touching code, and can stop it instantly. ───────────────────────────── PLATFORMS Interactive Brokers — TWS API, IB Gateway, ib_insync / ib_async MetaTrader 4 & 5 — MQL4, MQL5, Expert Advisors, multi-account routing TradingView — Pine Script, webhooks, alert design, connection to any broker Crypto — Binance, OKX, Kraken, HTX, Bitfinex, and any CCXT-supported exchange Futures & prop firms — NinjaTrader, Tradovate, TopstepX, DXtrade, Match-Trader Also — cTrader, TradeStation, OANDA, Alpaca, thinkorswim, MotiveWave, QuantConnect ───────────────────────────── ENGINEERING Languages & runtimes — Python, C++, C#, Java, Scala, Node.js, TypeScript, JavaScript, SQL Protocols & integration — REST, WebSocket, FIX 4.4 / 5.0 / FIXT 1.1, QuickFIX, HMAC-signed webhooks Data & infrastructure — PostgreSQL, Redis, SQLite, Docker, Linux, VPS deployment, structured logging, monitoring and alerting Web & full-stack — React, Next.js, Vue, Express, NestJS, FastAPI, real-time trading dashboards and client portals Automation & scripting — workflow automation, bot development, scheduled jobs, data pipelines, process automation, web scraping AI — OpenAI, Claude, Gemini, Llama, Mistral, DeepSeek, Gemma, Phi, Ollama for local deployment AI engineering — LLM integration, AI agents with tool calling, MCP servers, RAG and retrieval pipelines, AI-assisted market and signal analysis Algorithms — algorithm design and optimisation, backtesting engines, technical indicator libraries (RSI, EMA, MACD, MFI, DI, ADX), performance tuning Market structure — order routing, liquidity aggregation, order book aggregation, matching engines, spread algorithms Strategies I automate — market making, HFT and statistical arbitrage, triangular arbitrage, latency arbitrage, news trading ───────────────────────────── HOW TO START Send me your current setup and what you need — we'll scope the work properly before either of us commits to a build. If you'd rather start with a paid session, my 30-minute consultation is below.