Multi-Tenant Platform: Built Go backend serving enterprise clients with PostgreSQL schema-based tenant isolation. Designed REST API for B2B partners for data. Stored 285k+ hardware spectral analyses.
◦ Offline Mobile ML: Got ML models running on low-budget Android devices in the field without internet by converting TensorFlow/scikit-learn models to ONNX for C# native interop. Built multi-threaded system running up to 13 models concurrently in under 1s; taught Head of AI the conversion process who then scaled it across all models. Set up cloud model versioning per customer/equipment with S3 and mobile downloads. Helped sales demo in the field and deployed to 7 customers within 6 weeks
◦ Backend Rewrite & Infrastructure: Rewrote 263 TypeScript Lambda functions to Go with Clean Architecture over 3 months with another backend engineer. Containerized services with Docker and deployed on Oracle OCI and AWS (EC2, RDS, S3). Built Go Excel export generating 50k-row reports in under 30s with streaming decompression. Added OAuth 2.0 (Microsoft), AWS CloudFront CDN integration, HAProxy and NGINX load balancing with rate limiting. Created VPNs for secure connections and Proxies to forward database connection from my server. Created Makefile/bash automation for deployments and containerization. Implemented monitoring with Prometheus, Grafana, CloudWatch.
◦ DevOps & Automation: Set up CI/CD with GitHub Actions across 5+ services; created Makefile/bash automation for deployments and ETL with AWS Athena/Glue. Set up monitoring (Prometheus, Grafana, CloudWatch) and error tracking (Exceptionless)
◦ Cross-Team Work: Worked with mobile team (C# MAUI Blazor with Bluetooth NIR hardware), AI team (model deployment), ops (onboarding), and sales (Software requirements). Built demo infrastructure in 24 hours when manager missed deadline and landed R$360k contract after 3 month revenue drought due to hardware pivot