Захар

Zakhar Dziuniak
Middle Golang Engineer
Golang • Distributed Systems • Microservices • Cloud-Native

PROFILE

Backend Engineer with 4+ years of commercial experience in Golang and distributed systems. Focused on
microservice architecture, transaction processing, and event-driven backends. Experienced in building REST
and gRPC APIs, working with cloud infrastructure, and delivering reliable high-load services.

CORE SKILLS

• Go (Golang) — 4+ years • Microservices & distributed systems
• REST & gRPC APIs • AWS, Kubernetes, CI/CD
• Kafka, NATS (event-driven systems) • OAuth2, JWT, 2FA
• PostgreSQL, MongoDB, ClickHouse • Docker, Linux

EXPERIENCE

NDA Company (Fintech / Core Banking) Jan 2023 – Present
Middle Golang Developer

• Built and maintained core banking modules: account management, ledger, double-entry accounting
• Developed transaction processing engine with idempotent flows and reconciliation
• Designed REST and gRPC APIs for iOS/Android mobile applications
• Implemented event-driven services using Kafka and NATS
• Integrated third-party providers: KYC, payment gateways, AML systems
• Worked with AWS infrastructure and Kubernetes deployments
• Implemented secure auth flows: OAuth2, JWT, 2FA

Detectory Jan 2022 – Jan 2023
Junior Golang Developer

• Participated in migration from monolith to microservices architecture
• Designed and implemented backend services from scratch
• Built asynchronous processing pipelines
• Optimized analytical queries in ClickHouse and MongoDB

EDUCATION

Kyiv Polytechnic Institute — Bachelor's Degree in Computer Science