System Architecture

System design, API development, microservices, multi-language backend engineering

Backend systems and API architecture across Python, Go, Ruby, Crystal, Lua, and Node.js. We design for the problem at hand — choosing the right language and architecture for each component rather than forcing everything through one stack.

API Design & Development

REST APIs, webhook integrations, and service-to-service communication. OpenAPI/Swagger documentation. We’ve built billing integration APIs, CRM connectors, provisioning systems, and call control interfaces — all designed for reliability and clear contracts.

Microservices & Decomposition

Breaking monoliths into independently deployable services. We’ve decomposed large Rails applications into granular services — extracting collection, processing, notification, and worker components — while planning frontend migration strategies and database partitioning. The goal is always incremental migration with minimal downtime.

Backend Development

Production backend systems in Python, Go, Ruby (Rails, Grape), Crystal, Lua, and Bash. High-performance workers, queue consumers, real-time event processors, and API servers. We pick the right tool: Go for concurrency-heavy services, Python for AI integration and scripting, Ruby for rapid API development, Crystal for performance-critical workers.

Database & Data Architecture

PostgreSQL, MySQL, MongoDB, Redis. Schema design, query optimization, and large-scale migrations. We’ve executed multi-terabyte PostgreSQL migrations with under 10 minutes of downtime using incremental replication strategies. Redis and RabbitMQ for caching, pub/sub, and distributed messaging between services.

Documentation & Handover

Architecture Decision Records, technical specifications, and integration documentation. We deliver systems that your team can understand, maintain, and extend — not black boxes that require ongoing dependency.