systems engineer
I build backend, security, data, and distributed systems with a focus on correctness, reliability, and fast execution. My strongest work includes Elixir/OTP infrastructure, cryptographic protocol implementations, high-scale analytics pipelines, authentication systems, fintech backends, and production LLM integrations.
Low-level protocol work
Complete Elixir implementations of Noise Protocol, Nostr, Gemini/SpaceBoy, Reticulum, and native cryptography bindings.
Backend and data systems
Elixir/Phoenix services, SQL-heavy analytics workloads, background workers, event-driven architectures, and fintech payment workflows.
Security and reliability
Zero-downtime authentication migration, SSO, SAML, MFA, secure credential flows, observability, incident tooling, and operationally simple systems.
expertise
- Elixir & OTP - fault-tolerant, concurrent systems
- EventSourcing / CQRS - audit-ready, scalable architectures
- Cryptography - secure protocols, key management, E2EE
- Distributed Systems - resilient, observable backends
- LLM Integration - AI-powered features, designing agentic workflows and systems
- Authentication - OAuth, MFA, secure credential management
contact
- Web - sgiath.dev
- Email - FilipVavera@sgiath.dev
social media
- Nostr -
- Twitter - @SgiathDev
- XMPP - sgiath@sgiath.dev
other links
- GitHub - sgiath
- SourceHut - ~sgiath
- PGP - (download key)