Lead Architect - Java/Python

Domain :

Fintech Payments, Cards, Issuing & Acquiring Systems

About The Role

We are seeking a highly skilled Lead Architect with strong hands-on expertise in Java, Python, design patterns, database architecture, AWS cloud, combined with deep domain knowledge in the Payments & Cards ecosystem. The role will be responsible for defining scalable, secure, and high-performance architectures for mission-critical fin-tech systems.

Key Responsibilities

• Lead the end-to-end architecture for high-volume payment and card systems.
• Create architecture blueprints, integration patterns, API standards, and reference designs.
• Provide hands-on guidance in Java (Spring Boot, Spring Batch, Spring MVC) and Python components.
• Apply modern design patterns, system patterns (CQRS, DDD), and architectural frameworks.
• Architect databases for large-scale transactional platformsMySQL, PostgreSQL, etc.
• Architect cloud-native services using AWS components (EC2, RDS, S3, Lambda, CloudWatch / Loki, API Gateway).
• Architect solutions aligned with ISO 8583, EMV, tokenization, 3DS, and scheme mandates.
• Oversee integrations with VISA, Mastercard, RuPay, NPCI, banking partners, and processors.
• Work closely with Product, Engineering, DevOps, Security, and Operations teams.
• Lead architecture reviews, solution walkthroughs, and engineering design sessions.
• Maintain strong knowledge of emerging fintech, API, and card scheme trends.
  

Requirements

• 15+ years of backend engineering and architectural experience.
• Strong hands-on expertise in Java (Spring Boot, Spring Batch, Spring MVC) and Python.
• Proven experience architecting large-scale systems on AWS Cloud.
• Strong knowledge of GitLab CI/CD, pipelines, branching strategy, and release automation.
• Deep understanding of Payments, Cards, ISO 8583, EMV, and transaction switching.
• Expertise in microservices architecture, design patterns, and distributed systems.
• Strong experience in database design (MySQL/PostgreSQL).
• Familiarity with caching, messaging systems, and cloud networking.
• Strong problem-solving and communication skills.
  

Why Join Us?

• Build next-generation Fintech platforms used by millions.
• Work with a strong and supportive engineering and leadership team.
• Grow in a culture focused on ownership, innovation and learning.
  

Shape our long-term technology direction with real influence.
(ref:hirist.tech)