# Andrew Dryga

> Engineering leader who turns fragile systems into reliable, observable, cost-sane platforms.

## About

Andrew Dryga is a multi-hat product-minded engineering leader with 17+ years of experience. He has held roles from Principal Engineer at early-stage startups to CTO at established products, consistently shipping what matters, measuring results, and cutting waste without slowing teams.

- Email: andrew@dryga.com
- Website: https://dryga.com
- GitHub: https://github.com/andrewdryga
- LinkedIn: https://www.linkedin.com/in/andrew-dryga-bb382557/
- CV: https://dryga.com/downloads/cv.pdf
- Full site export: https://dryga.com/llms-full.txt

## Key Achievements

- Grew revenue 3x to mid-seven figures while slashing infrastructure costs by $2M+/yr — both in year one
- Architected and shipped Ukraine's national eHealth platform serving 35M+ patients and 400K+ medical professionals
- Single-handedly operated legacy Elixir systems and infrastructure handling 100K+ RPS across tens of services
- Passed SOC 2 Type II audits and penetration tests for enterprise security product (Firezone, YC W22)
- 19 open-source packages on hex.pm with 21M+ combined downloads

## Expertise

- Backend & distributed systems: Elixir, Phoenix, LiveView, Erlang/OTP (10+ years)
- Infrastructure: Terraform, GCP, AWS, Kubernetes, Helm, Docker
- Databases: PostgreSQL, Redis, Cassandra, RabbitMQ, Kafka
- Practices: platform engineering, site reliability, observability, CI/CD, cost optimization
- Leadership: hiring, mentoring, cross-functional collaboration, product strategy

## Notable Projects

### Blitz (AdTech, 2023–present)
Single-handedly owned ~20 high-traffic backends (77 Elixir umbrella apps, 70+ Redis/50+ PostgreSQL instances) serving ~25k RPS with peaks to 120k. Cut cloud spend 91% ($220k/mo to $20k/mo), saving >$2M/yr. Drove daily errors from six-figure counts to near-zero.

### Hammer Corp (AdTech, 2017–2023)
Led engineering for a call center platform from stagnation to 3x+ revenue growth (8 figures). Managed 150+ agents with a 60-second SLA. Spun off two additional products (TalkInto, Bullpen).

### eHealth (HealthTech, 2017–2018)
Led design and launch of Ukraine's National Health Service digital platform — built by a team of 10 in 6 months. Serves 35M+ patients, 400K+ healthcare workers, 16K+ medical facilities. Open sourced under Apache license.

### Firezone (Security, YC W22, 2022–2023)
Wrote ~60% of the codebase for an enterprise WireGuard-based VPN replacement. Achieved 99.99%+ uptime, 8.4K+ GitHub stars. Passed SOC 2 Type II and multiple penetration tests.

### Contractbook (LegalTech, 2021–2022)
Built billing infrastructure, B2B API integrations, and CRM pipeline automation for a contract management platform (now Series B, backed by Microsoft).

### Open Source
- Sage: sagas pattern for Elixir (1.83M+ downloads)
- Confex: runtime configuration (3.9M+ downloads)
- LoggerJSON: structured JSON logging (4.9M+ downloads)
- 19 packages total on hex.pm, 21M+ combined downloads

## Testimonials

"Andrew is easily one of the best engineers I've had the pleasure to work with in my career." — Jamil Bou Kheir, CEO at Firezone (YC W22)

"Andrew is one of the most efficient engineering managers I've worked with. He focuses on business results that can be unlocked with pragmatic technical moves." — Ivan Alts, Co-founder at Reface

"Andrew is the best manager that I worked with. He has the strong skills in team organization and motivation." — Oleksii Bondarenko, Founder at Superbase.me

"Knowledgeable and experienced contributor that can also lead. Andrew took charge when it was needed and made room for others to grow." — Jarek Owczarek, Founder at Contractbook