Fullstack Blockchain Developer

2 weeks ago

Johar Town Punjab, Pakistan OctaMD Full time 900,000 - 1,200,000 per year

Job Title: Full Stack Blockchain Developer

Summary:

We're building a cross-border payments platform with custody, KYC, ACH funding, stablecoin conversion, and payout integrations (Zero Hash, Plaid, PSPs like ). You'll own backend services that connect these pieces, ensure compliance, and keep the ledger accurate.

What you'll do:

  • Build and maintain microservices in or Go (ECS Fargate, Lambda).

  • Integrate with Zero Hash APIs (custody, KYC, payments, liquidity, transfers).

  • Implement Plaid (ACH, external account linking) and Astra/PSPs (card funding, payouts).

  • Design and manage databases: DynamoDB, RDS (double-entry ledger), Redis cache.

  • Work on authentication & KYC flows with Cognito + Zero Hash SDK.

  • Build payment flows (ACH debit, mint/burn stablecoins, PSP payouts).

  • Implement monitoring, security, and scaling patterns on AWS (CloudWatch, Secrets Manager, API Gateway, VPC, etc).

What we're looking for:

  • 3+ years backend engineering experience.

  • Strong in API design and integrations (REST, webhooks, HMAC signing).

  • Comfortable with AWS stack (Lambda, ECS, RDS, DynamoDB, S3, Secrets Manager).

  • Experience with databases and ledgers (transactional consistency, double-entry).

  • Familiarity with payments/fintech concepts: KYC, ACH, fiat/crypto conversions, PSPs.

  • Good understanding of security practices (auth, key management, rate limiting).

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