Golang Engineer – Payment Gateway

Що робити

Design and develop highly concurrent, low-latency microservices in Go for payment authorization, routing, risk checks, and settlement
Implement and maintain payment scheme integrations (Visa, Mastercard, local schemes, APM providers, open banking)
Build resilient transaction processing pipelines with idempotency, retries, circuit breakers, and distributed tracing
Work on ledger systems, balance management, and real-time reconciliation
Optimize for throughput, latency, and cost under high load

Strong production experience with Go (concurrency patterns, channels, context, error handling, testing)
Hands-on experience building or working on payment gateways, payment processors, or high-volume transaction systems
Solid understanding of payment flows: authorization, capture, void, refund, chargeback, 3DS, tokenization
Experience with relational databases (PostgreSQL preferred) and at least one message broker / event system (Kafka, NATS, RabbitMQ, etc.)
Knowledge of distributed systems concepts: eventual consistency, idempotency, exactly-once semantics, saga patterns

Experience with PCI-DSS environments and secure coding practices for payment data
Knowledge of ISO 8583, card schemes, or open banking APIs (TrueLayer, Plaid, etc.)
Experience with Go frameworks/libraries commonly used in fintech (e.g., gRPC, chi/fiber/echo, sqlc/pgx, go-kit)
Background in ledger or double-entry accounting systems
Experience with multi-currency, FX, or cross-border payments

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