Golang Developer (Payment Integrations)

Компания "Devhunt"

Обязанности:

• PSP integrations: design/build adapters for card processors, APMs, e‑wallets, bank transfers, crypto on/off‑ramps
• Secure communication: HMAC/RSA signatures, mTLS, IP allowlists, replay protection
• Payment flows: deposits, withdrawals/payouts, refunds, chargebacks; async webhooks with strict idempotency
• Resilience & scale: retries/backoff, deduplication, outbox, sagas, circuit breakers, horizontal scaling
• Reconciliation: settlement files (SFTP/APIs), T+N matching, ledger consistency, dispute tracking
• Compliance & risk: PCI‑DSS friendly designs (tokenization), PSD2/SCA, 3DS 2.x, AML/KYC signals, velocity limits
• Observability: real‑time dashboards, alerts, decline reason analytics, PSP uptime/latency SLOs
• Orchestration: routing/cascading across PSPs by GEO/payment method, failover, A/B and rule engines

Требования:

• 3+ years of professional Go, strong concurrency and performance mindset
• Expert REST API design/implementation, robust webhook consumers
• MySQL mastery (schemas, indexing, heavy queries) and solid Redis usage - Idempotency at scale: keys, dedupe windows, exactly‑once illusions over at‑least‑once delivery
• Testing discipline: unit/integration, contract tests, sandbox/prod parity; strong debugging
• Event‑driven architecture: queues, outbox, saga patterns; RabbitMQ/Kafka in production

Условия:

• Direct work with external partners/providers
• Complex architectural challenges at scale
• Meaningful product influence and ownership
• A strong, senior engineering team
• Remote-first culture

• Full legal employment with an international company

• Remote work.