Kalshi Demo Environment Support
This post covers the implementation of ADR-015 (Kalshi Demo Environment Support), enabling safe testing with Kalshi's demo API without risking production credentials or capital.
Blog¶
Engineering blog posts documenting intent, decisions, and implementation details.
Each post follows the CLAUDE.md requirement: developer-centric articles explaining the decision-making process with implementation examples.
Closing ADR Gaps: Nonce Management, Risk Controls, and Key Rotation
Completing the remaining implementation gaps across ADRs 004, 005, 007, and 009 with thread-safe nonce management, risk manager actor, compensation executor, and key rotation support.
Extracting Architecture ADRs for Full Traceability
How we resolved an ADR naming conflict and established bidirectional traceability between requirements, decisions, and implementation.
Deploying to AWS us-east-1
How we built infrastructure-as-code with Terraform for deploying our trading system to AWS, including ECS Fargate, Aurora PostgreSQL, and ElastiCache Redis.
Dual-Interface Control with gRPC and Telegram
How we built a trading control plane with gRPC for programmatic access and Telegram for mobile-friendly monitoring.
Defense-in-Depth Credential Security in Rust
How we implemented AES-256-GCM encryption with HKDF key derivation for secure credential storage, including memory safety with zeroize.
Building the Arbiter-Bot Documentation Site
How we chose MkDocs Material for our documentation platform and what we learned implementing it.
Kalshi WebSocket Delta Application
Implementing efficient orderbook state management for real-time market data using BTreeMap and incremental delta updates.
Lock-Free Data Structures for Low-Latency Trading
How we implemented a lock-free orderbook cache using arc_swap and dashmap to minimize latency in our arbitrage detection loop.
PostgreSQL RLS for Multi-Tenant Trading
How we implemented subscription tiers, token bucket rate limiting, and PostgreSQL Row-Level Security for tenant isolation.