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zs-dima/README.md

Hi 👋 I'm Dmitrii Zusmanovich

Software Architect · Senior Software Engineer

0→1 products at scale: AI, fintech, healthcare, enterprise Rust & Go backends · Flutter: iOS, Android, web, desktop AI in production: multi-agent systems, RAG, MCP, LLM fine-tuning

LinkedIn Blog Email Location

⭐ Open source

Rust crates passing the full bufbuild conformance suite — downloads counted live:

crates.io downloads crates.io

prost-protovalidate — protobuf validation for prost/Tonic with CEL evaluation. Conformance: 2854/2854.

tonic-rest — type-safe REST, OpenAPI 3.1 and SSE generated from proto annotations for Tonic/Axum. No runtime proxy.

whisper.rs — real-time speech-to-text server on whisper.cpp: Axum, WebSocket streaming, voice activity detection.

auth-service-rs + auth-app — full-stack identity reference: Rust gRPC on hexagonal architecture, Flutter client on six platforms.

🧭 Track record

15+ years of engineering, from core banking to AI platforms. Teams of up to 20.

Founding developer of MARK5 — secure email and document collaboration for maritime operators. Still in production 18 years later as reMARK, at 300+ companies including Maersk and Glencore; acquired by Sedna in 2024.

Open to senior backend / AI-platform roles and independent projects.

⚙️ Tech stack

Languages

Rust Go Dart Python .NET Kotlin Swift

Backend & data

gRPC OpenAPI GraphQL PostgreSQL Redis Kafka RabbitMQ

Cloud & DevOps

AWS Google Cloud Azure Kubernetes Helm Docker Argo CD GitHub Actions

Clients & AI

Flutter iOS Android Web AI

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  1. prost-protovalidate prost-protovalidate Public

    Protobuf message validation for prost/Tonic with CEL evaluation. Full bufbuild conformance: 2854/2854.

    Rust 25 2

  2. auth-service-rs auth-service-rs Public

    Rust gRPC identity service on hexagonal architecture — SQLx, OpenTelemetry, token rotation.

    Rust 1

  3. tonic-rest tonic-rest Public

    Type-safe REST, OpenAPI 3.1 and SSE generated from proto annotations for Tonic/Axum. No runtime proxy.

    Rust 7 3

  4. auth-app auth-app Public

    Cross-platform Flutter client for auth-service-rs — iOS, Android, web, Windows, macOS, Linux.

    Dart 1

  5. whisper.rs whisper.rs Public

    Real-time speech-to-text server wrapping whisper.cpp — Axum, Tokio, WebSocket streaming, VAD.

    Rust 2

  6. auth-service auth-service Public

    Go gRPC authentication service — clean architecture, sqlc, JWT.

    Go 2