Oleg Gavrilov

Service lines

Domain & Architecture

Technical documentation, requirements analysis, domain modeling, system decomposition, and architecture decisions for event-driven, distributed, high-load, and real-time systems.

DDDEvent-drivenDistributed

Full-Stack Development

Backend, frontend, and full-stack implementation in Rust, Go, PHP, Python, and TypeScript — APIs, integrations, asynchronous workflows, and performance-sensitive components.

RustGoPHPPythonTypeScript

Payments & Subscriptions

Stripe payments, subscriptions, billing, and webhooks. Wise payment and transfer workflows. RevenueCat subscriptions and entitlements. Firebase Authentication, Firestore, and Cloud Messaging. Exchange, broker, payment-provider, and financial-data APIs. Idempotent, retry-safe transactional flows.

StripeWiseRevenueCatFirebase

Data & Reliability

Database design, migrations, and performance optimization. Testing, observability, and production reliability — including concurrency, retries, and partial failure recovery.

PostgreSQLObservabilityTesting

Production Delivery

Deployment, release automation, and continued system evolution. From isolated components to full ownership of a substantial technical scope through production release.

CI/CDReleaseOperations

Engagement Model

Best suited for projects that require ownership of a substantial technical scope rather than isolated development tasks: understanding the domain, making architectural decisions, implementing the system, and delivering a complete working result to production. Worldwide availability with contracting via US LLC or Georgia IE.

OwnershipRemoteWorldwide

Contact

Reach out via LinkedIn or email to discuss scope, timeline, and engagement model. NDAs, IP assignment, and invoicing are straightforward — US LLC or individual entrepreneur in Georgia.

EmailLinkedIn