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◆ 9/10
devfintechcryptoBackend Developer
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About this role
SendNOW is looking for an Integration Developer with strong Backend focus and experience in Fintech/Payments. Remote work available worldwide.
Description
SendNOW is a company focused on payment solutions, providing services for money transfers and financial integrations.
Responsibilities
- Develop and maintain integrations with payment and financial services (REST/SOAP API, OAuth, API-key/Bearer);
- Connect new providers, currencies, and countries, develop pay-in/pay-out flows;
- Design and implement REST API on Node.js + TypeScript + Express;
- Implement webhooks: signature/HMAC verification, idempotency, deduplication, retries;
- Troubleshoot integration issues (timeouts, partial failures, API instability);
- Work with NoSQL: data modeling, indexes, transactions;
- Support KYC/AML integrations;
- Write unit/integration tests and participate in code reviews;
- Deploy and maintain services in the cloud, troubleshoot production incidents.
Requirements
- 3+ years of commercial development experience in Node.js + TypeScript;
- 1+ year of practical experience in Fintech/Payments/Banking/payment-heavy e-commerce;
- Experience in developing and supporting integrations with external APIs (REST and SOAP);
- Strong understanding of HTTP/HTTPS, REST API, webhooks, authentication, and status codes;
- Practical experience with idempotency, retries, deduplication, and HMAC/signature verification;
- Experience working with NoSQL;
- Understanding of monetary calculations and floating point issues (experience with BigNumber/Decimal or similar);
- Experience with Docker and deploying backend services in GCP/AWS/Azure.
Conditions & Benefits
- Salary: $3,000 – $3,500 USDT;
- Remote work from anywhere in the world (GMT+3 time zone).
Job Details
LocationRemote
AI Score★★★★★★★★★☆ 9/10
PostedSep 18, 2026 (25d ago)
Tags & Skills
devfintechcryptoBackend Developerremote
Tech Stack
Node.jsTypeScriptExpressRESTSOAPWebhooksZodOpenAPISwaggerNoSQLFirestoreMongoDBDockerGCPAWSAzureBigNumberDecimal
Join Talent Pool
Subscribe to our Telegram channel
✓ Direct apply: you message the hiring person. No ATS.