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(3 Days Left) Java Backend Engineer Job Opening In India, India – Now Hiring Innovitegra Solutions Private Limited


Job description

Java Backend Engineer

Role Summary

We’re looking for a hands-on Java backend engineer to design, build, and operate services that enable network-tokenized payments across Mastercard ecosystems: Click to Pay (SRC), Apple Pay, Google Pay, and Samsung Pay.

You’ll integrate with Mastercard (MPGS/MDES), implement secure token lifecycle flows, and deliver high-availability APIs with strong security and compliance (PCI DSS).

Key Responsibilities

Design and develop backend services/APIs in Java (Spring Boot) for:

Mastercard Click to Pay (SRC 2.x) enrollment, profile, cryptograms, and checkout orchestration.

Wallet token flows for Apple Pay / Google Pay / Samsung Pay (tokenization, provisioning, PAN/D-PAN handling via MDES, cryptogram verification, payment token decryption/validation paths, when applicable).

MPGS authorization/capture/refund/void flows and webhook/callback handlers.

Implement network token lifecycle: provisioning, suspension, resume, PAN mapping, detokenization (where applicable) and card-on-file updates.

Build merchant validation / domain association flows (e.g., Apple merchant validation, GPay gateway params), and manage SRC profiles.

Implement robust security: JWE/JWS, JWT signing, HSM/TR-31 usage (or KMS alternatives), mTLS, key rotation, and secrets management.

Ensure PCI DSS compliant logging, data minimization, and tokenized storage.

Optimize service performance & scalability (caching, connection pools, async processing, idempotency keys, outbox pattern, retries, circuit breakers).

Create CI/CD pipelines (GitLab + ArgoCD), IaC templates, and production run-books.

Observability: structured logging, distributed tracing, metrics, dashboards, and alerts (SLOs/SLAs).

Partner with frontend/mobile teams for Click to Pay UX and wallet checkout payload exchange contracts.

Produce technical docs (API specs, sequence diagrams) and support audits/certifications.

Must-Have Skills

Java 17+, Spring Boot, REST/gRPC, Gradle/Maven.

Deep knowledge of payments: authorization flows, cryptograms (3DS2/CAVV/ECI), tokenization, PAN/D-PAN mapping, BIN ranges, merchant/acquirer concepts.

Experience with Mastercard integrations (e.g., MPGS, MDES or issuer/acquirer rails).

Practical know-how of Apple Pay / Google Pay / Samsung Pay server-side flows:

Merchant validation (Apple) and payment token processing patterns.

Google Pay/Samsung Pay gateway processing and payload verification.

SRC (Click to Pay) concepts: SRCI, profiles, identity, EMVCo specs (high level).

Security/crypto: JWE/JWS, JWT, mTLS, certificate pinning, KMS/HSM concepts, nonce/IV handling.

Data stores: MySQL/PostgreSQL, schema design, indexes, query performance tuning.

Messaging & patterns: Outbox, Idempotency, Retry/Backoff, Circuit Breaker.

Cloud & containers: Docker, Kubernetes/GKE, GitLab CI, ArgoCD.

Observability: OpenTelemetry, Prometheus/Grafana, log aggregation.

Strong understanding of PCI DSS controls relevant to application development.

Nice-to-Have

Kotlin experience; familiarity with Go for perf-critical services.

NATS/RabbitMQ/Kafka for async flows.

Experience with MPGS features (3DS server integration, session IDs, token vaults).

Knowledge of 3DS 2.2, SCA, risk-based authentication, and dispute flows.

GCP stack: GKE Autopilot, Cloud SQL, Secret Manager, Cloud Armor, Pub/Sub.

Caching: Redis; API gateways: Kong/Apigee.

Required Skill Profession

Computer Occupations


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