Go backend engineer who has built microservices systems, org-wide shared tooling, and distributed workflow systems at Qtera, now leading its backend team. Designed a chainable SQL query builder adopted across all services and wrote AST-level tooling for impact-analyzing dependency changes across an organization's repositories. All personal projects run on own infrastructure (AWS Lightsail, Cloudflare Pages/Workers, R2), not free-tier subdomains. Ships personal projects with unit tests by default. Full-stack capable; backend-first by choice.
Built to solve a real cross-repo upgrade problem: traces call sites across an org's repositories, detects behavioral changes via SHA-256 body hashing. Concurrent worker-pool pipeline. Unit tested per module.
Trading signal platform for Indonesian Sharia equities: public dashboard with backtest runner, candlestick charts, and trading journal. Private backend: workflow-orchestrated signal engine with automated parameter sweep. Frontend open-source; strategy logic private.
Visual PostgreSQL schema designer with DDL export in correct topological order. Schema lives in a gzip URL hash; shareable as a single link, no backend. 81 tests, 88% coverage.
Branch divergence and PR tracker for Git orgs: zero local clones, all counts from the compare API. gitlag review returns an AI-generated verdict computed against the true merge base, not branch tip. Multi-format output: table, JSON, CSV, Markdown.
Zero-config PostgreSQL + SQLite migration CLI. mig test runs a full Up->Down->Up cycle against a throwaway DB to catch asymmetric pairs before prod. Transactional DDL, automatic rollback. Docker image published via CI/CD.
Personal finance microservices backend: expense tracking, income, liabilities, and budget planning across dedicated services. Each service owns its own PostgreSQL database. Temporal orchestrates domain workflows. Deployed on DomCloud.