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ZipNom

Backend Engineer

Posted Yesterday
Remote
Hiring Remotely in IND
Mid level
Remote
Hiring Remotely in IND
Mid level
Own the verification API suite and provider integration layer. Build resilient primary and fallback adapters, normalize external responses, protect PII, and deliver contract-tested endpoints with OpenAPI documentation, fixtures, pricing, and error copy. Implement retries, timeouts, circuit breakers, failover, canary testing, and charge-correctness logic. Build reconciliation jobs matching provider calls to invoices, while maintaining reliable weekly releases and low endpoint error rates.
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This is a remote position.

About Verizol

Verizol is ZipNom's company intelligence and verification platform: 45+ APIs (KYC, KYB, bank, face, OCR, CKYC, eSign) built on a daily MCA data pipeline, sold through a single API key and prepaid credit wallet. Our customers are CA firms, fintechs, NBFCs, and marketplaces. The engineering blueprint is written, the 8-week build plan is set, and the team is small enough that your name is on what ships.

The Role

You own the verification suite — the 30+ endpoints (PAN, Aadhaar, GST, bank penny drop, face match, OCR, CKYC, utilities) that make up Verizol's rate card — and the provider integration layer beneath them. The architecture gives you one adapter pattern; your job is turning it into thirty reliable, contract-tested, correctly-priced endpoints on a weekly release cadence, integrated against external aggregator APIs of highly variable documentation quality.

This is a shipping role. Its satisfaction is a release table turning green week after week, failover that actually fails over, and a reconciliation report that closes within 2% of the vendor invoice.

What You Will Do

  • Build and own provider adapters (primary + fallback aggregators): auth, request/response mapping, normalization into Verizol's canonical schemas, PII masking in logs
  • Ship endpoint waves on the release plan — each endpoint to full Definition of Done: contract in OpenAPI, handler, sandbox fixture, contract test, pricing config, docs page
  • Implement resilience: timeouts, retries, circuit breakers, provider failover, and a nightly canary against aggregator sandboxes that catches upstream drift before customers do
  • Own charge-correctness at the endpoint level: customers are charged for answers (including definitive negatives), never for provider failures
  • Build the reconciliation job matching our provider-call records against aggregator invoices
  • Write the docs pages and error copy for your endpoints — you're closest to their real behavior


Requirements

Required Skills

  • 3–6 years backend engineering with strong REST integration experience — you've consumed messy third-party APIs in production and have opinions about timeout budgets
  • TypeScript/Node.js proficiency (NestJS a plus), or deep Laravel/PHP with willingness to switch
  • Testing discipline: fixtures, recorded responses, contract testing — you don't ship an integration you can't replay locally
  • Solid HTTP and error-taxonomy fundamentals: idempotency, retries vs duplicates, 4xx vs 5xx semantics
  • SQL competence (Postgres) — comfortable with the queries behind usage logs and reconciliation
  • Methodical temperament: this role rewards engineers who love finishing, not just starting




Benefits

Preferred

  • Prior work with Indian KYC/verification rails: aggregators (Surepass/Zoop/Signzy class), NSDL/PAN, penny drop, CKYC, or UIDAI ecosystem constraints
  • Circuit breakers/bulkheads in production (any framework)
  • Fintech compliance basics: PII handling, masking, audit logging

What Success Looks Like

  • Week 3: first wave live (PAN, GST, Aadhaar, penny drop, VPA) on staging with sandbox fixtures
  • Week 6: all 30+ rate-card endpoints live; failover proven in chaos tests; nightly canary running
  • Month 3: first monthly reconciliation closes within 2% of the aggregator invoice; your endpoints' error rate is a dashboard nobody worries about


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