Technical Lead

Digital Convergence Technologies Inc.; Pune District; On-site; INR 1,500,000 - 3,000,000; Full time

Job summary

Digital Convergence Technologies Inc. is seeking a skilled professional to join their Pune office. The role involves frontend and backend implementation focusing on financial systems, ensuring code quality, handling transactions, and integrating APIs.

The ideal candidate should have over 4 years of experience in the Fintech sector with strong Node.js and NestJS skills, along with experience in high-volume transaction processing systems.

Qualifications

• 4+ years of experience in the Fintech/Finance domain.
• 6+ years of experience working with US customers.
• Strong expertise in Node.js and NestJS for backend service development.

Responsibilities

• Develop secure REST APIs for financial transactions.
• Build balance reservation and release workflows.
• Implement reconciliation break handling mechanisms.

Skills

Node.js

NestJS

Experience in Fintech/Finance

SQL databases

Microservices

Distributed systems

Concurrency control

Job description

Key Responsibilities

Frontend Implementation

• Provide guidance for frontend development in React, MUI, Redux/Zustand
• Review PRs and ensure code quality
• Integrate APIs and SSO
• Ensure security with proper understanding of various attack vectors
• Implement payment lifecycle workflows
• Build secure REST APIs for financial transactions
• Develop ledger posting and balance update mechanisms
• Ensure idempotent and concurrency-safe transaction handling
• Implement transaction validation and state transitions
• Build balance reservation and release workflows
• Integrate compliance and screening responses into payment flows
• Implement reconciliation break handling mechanisms

Back‑End Implementation

• Develop event‑driven consumers and producers
• Implement retry and backoff patterns
• Ensure exactly‑once or safe reprocessing logic

Code Quality & Delivery

• Enforce unit and integration testing
• Participate in CI/CD automation
• Lead code reviews
• Optimize performance and database queries

Required Skills

• Must have experience working in Fintech/Finance domain for > 4 years
• Must have experience working with US customer for > 6 years
• Strong Node.js / NestJS experience
• Experience in financial systems or transaction-heavy systems
• Microservices and distributed systems experience
• Strong understanding of concurrency and idempotency
• rong expertise in Node.js and NestJS for building scalable backend services.
• Experience designing and implementing high-volume transaction processing systems. Strong knowledge of SQL databases, query optimization, indexing, and database performance tuning.
• Experience with microservices architecture and distributed systems.
• Deep understanding of database transactions, ACID principles, consistency models, and data integrity.
• Strong knowledge of concurrency control, race condition handling, and idempotent transaction processing.
• Experience building and maintaining event-driven architectures using messaging platforms such as Kafka, RabbitMQ, or similar technologies.
• Hands-on experience implementing Dead Letter Queues (DLQ), retry mechanisms, exponential backoff strategies, and resilient message processing patterns.
• Strong understanding of exactly-once processing, event replay, and safe reprocessing mechanisms.
• Experience with database migration strategies, schema versioning, and deployment planning.