#Elixir

Single-handedly owned ~20 high-traffic backends end-to-end (77 Elixir umbrella apps, 70+ Redis/50+ PostgreSQL instances) serving ~25k RPS with peaks to 120k for a 7-figure DAU product.

WireGuard-based replacement for legacy VPNs. Re-architected and developed key components of the enterprise product. Led infrastructure as code with Terraform on GCP. Open source, YC W22.

Co-designed and built the national platform behind reimbursements, EMR, e-prescriptions, and nationwide APIs for clinics and pharmacies. Led architecture, security, hiring, and hands-on Elixir + DevOps. All development open-sourced under Apache license.

Advertising platform for thousands of US automotive dealerships: ingests inventory, syndicates ads to major channels (at peak accountable for 30%+ cars on Facebook Marketplace), measures conversion, and collects leads to a unified interface with 24/7 human first-responder reps answering within 60 seconds.

When COVID hit, our sales team lost the buzz of the office. We built a platform that brought it back - a CRM with virtual space where reps could collaborate, learn from each other in real time, and keep the same drive. Then we turned it into a standalone product with AI sprinkled around it.

Messaging/voice backbone powering products like Hammer, Bullpen, and Text2Buy: SMS, voice, various chat integrations, and web chat with clean agent UI and APIs. Features included local numbers, call recording, and routing.

Built the self-service billing system, B2B API and marketing pipeline that let kicked off the business growt.

Architecture and implementation for an institutional P2P lending marketplace for one of Europe's largest lenders ($9B portfolio).

Dependency-free implementation of the Sagas pattern for distributed transactions with explicit compensation. Guarantees that either all transactions complete successfully, or compensating transactions amend partial execution.

Structured JSON logging for Elixir with first-class formatters for Google Cloud Logging, Datadog, and Elastic (ECS). Drop-in :logger formatter/handler with runtime config helpers.

Runtime configuration from environment variables with type casting and adapters (:system, :system_file). 12-factor friendly configuration for Elixir applications.

Continuous benchmarking platform for the Elixir ecosystem. Automatically runs performance benchmarks on each commit to detect regressions and track language performance improvements over time. Won Spawnfest 2017 and later accepted into Google Summer of Code.

Configurable API gateway acting as a reverse proxy with a plugin system (ACL, Auth, Validation, CORS, Idempotency), request/response storage, metrics, management UI, and auth provider. Reduces boilerplate across services.

Ecto adapter for OTP's built-in Mnesia database that works in the same memory space as the application, providing extremely low latency without deploying a separate database.

Stores iex, mustache, or markdown templates and renders them with localization to HTML or PDF via REST JSON API. Includes an easy-to-use management UI. Free one-click deployment to Heroku.