Senior Java Developer

Steersman Talent Acquisition; Mumbai; Vor Ort; INR 3.500.000 - 6.000.000; Vollzeit

Zusammenfassung

Antal International is seeking a Senior Java Backend Developer to design and modernize core payment platforms processing millions of transactions daily in an Indian payments landscape.

You will drive architectural decisions, optimize performance, and lead a team of backend developers with a focus on DDD, SOLID, and secure, compliant architectures.

Qualifikationen

• Extensive experience building backend systems in high-throughput payments.
• Strong knowledge of microservices architecture and distributed systems.
• Proficiency in Java/JVM tuning, performance optimization, and security standards.

Aufgaben

• Lead end-to-end design and implementation of highly available microservice backends and payment routing gateways.
• Tune JVM runtime, memory, GC, and async I/O to support thousands of TPS with sub-200ms latency.
• Implement distributed patterns: Saga, Circuit Breakers, rate limiting, idempotency, and DLQ mechanisms.
• Architect immutable ledgers and real-time reconciliation with auditability and data integrity.
• Enforce PCI-DSS tokenization, TLS 1.3, and RBI guidelines; ensure regulatory compliance.
• Mentor developers in domain-driven design (DDD) and SOLID principles.

Kenntnisse

Java

Backend

Microservices

JVM tuning

DDD

SOLID

Security compliance

Tools

Resilience4j

DLQ

TLS 1.3

HSM integrations

Jobbeschreibung

ABOUT THE ROLE & ORGANIZATION ECOSYSTEM:

Antal International has been mandated to hire a strategic Senior Java Backend Developer for a high-volume payment processor ecosystem (aligning with platform scales similar to BillDesk, NPCI rails, and tier-1 acquiring bank switches). In this high-impact position, you will lead the design, execution, and modernization of core backend payment platforms processing millions of critical financial transactions daily. You will insist on the highest engineering standards for extreme low-latency processing, distributed system fault tolerance, strict transactional integrity, and regulatory compliance within the Indian payments landscape.

KEY CORE RESPONSIBILITIES:

• Enterprise Architecture & Engineering: Lead the end-to-end design and implementation of highly available (99.999% uptime), fault-tolerant, microservices-based backend platforms and payment routing gateways.
• High-Throughput Performance Tuning: Optimize JVM runtime, memory management, garbage collection (ZGC/Shenandoah), database queries, and async I/O pipelines to support thousands of TPS with sub-200ms processing budgets.
• Resilience & Distributed Transaction Design: Implement robust distributed system patterns, including Saga Orchestration/Choreography, Circuit Breakers (Resilience4j), Rate Limiters, Idempotency keys, and Dead Letter Queue (DLQ) recovery mechanisms.
• Ledger & Financial Integrity: Architect immutable, double-entry ledger platforms and automated real-time reconciliation systems ensuring 100% auditability and zero data loss.
• Security & Regulatory Governance: Enforce stringent security standards including PCI-DSS tokenization, OWASP Top 10 mitigations, TLS 1.3 encryption, HSM integrations, and adherence to RBI Payment Aggregator guidelines.
• Technical Leadership & Mentorship: Drive code reviews, establish technical roadmaps, define coding standards, and mentor mid-level backend developers in domain-driven design (DDD) and SOLID principles.

FINTECH & BANKING DOMAIN EXPERTISE (HIGHLY PREFERRED)

• Deep domain familiarity with Payment Gateway Switches, Card Networks (Visa, Mastercard, RuPay), UPI Rails,
• Dynamic Smart Routing Engine, Merchant Onboarding / Escrow Management, ISO 20022 / ISO 8583
• Messaging, Tokenization Vaults, and Automated Bank Settlement/Reconciliation Engine.