Sr. Backend Engineer – Java/Kotlin | Remote India

🔥 **Senior Backend Engineer | Java | Kotlin | Python | Payments | Remote**
If you're passionate about Java, Kotlin, Python, distributed systems, and building reliable payment solutions at scale, we'd love to connect!
📍 **Location:** India
🌏 **Work Mode:** 100% Remote
💼 **Experience:** 4+ Years
⚡ **Domain:** Payments & Financial Systems
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💥 **What You'll Do:**
• Develop and maintain backend services supporting end-to-end payment flows
• Build and enhance payment features, including charges, refunds, disputes, and webhooks
• Design and integrate RESTful and GraphQL APIs across microservices
• Refactor legacy Java services, reduce technical debt, and improve test coverage
• Implement asynchronous processing, message queues, and distributed-system workflows
• Write unit, integration, and contract tests to ensure production reliability
• Troubleshoot and resolve production incidents in payment and billing systems
• Maintain GitLab CI/CD pipelines and deliver production-ready code through peer reviews
• Collaborate with product managers, partner teams, and engineering stakeholders
• Document technical designs, API specifications, knowledge-transfer materials, and runbooks
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✅ **Must-Have Requirements:**
• 4+ years of hands-on backend software engineering experience
• Strong proficiency in **Java** as the primary programming language
• Experience with **Kotlin and Python** as complementary skills
• **Payments, Fintech, or Billing domain experience (Must-have)**
• Hands-on experience building production payment flows, including charges, refunds, disputes, and webhooks
• Experience developing RESTful and GraphQL APIs, microservices, and event-driven systems
• Strong knowledge of relational databases, **MySQL, and SQL**
• Experience with distributed systems, message queues, asynchronous processing, and eventual consistency
• Experience writing unit, integration, and contract tests
• Hands-on experience with GitLab, code reviews, and GitLab CI/CD pipelines
• Experience refactoring legacy services, migrating APIs, and implementing regression testing
• Experience resolving production incidents and designing internal APIs for downstream services
• Familiarity with Agile/Scrum and sprint-based delivery, including Jira
• Upper-intermediate English communication skills
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➕ **Good to Have:**
• Experience in a large enterprise engineering organization
• Familiarity with Spring Boot, Gradle, and service mesh technologies
• Knowledge of PCI-DSS compliance, payment security, and financial data handling
• Experience with observability tools such as Datadog
• Open-source contributions or a portfolio of shipped payment features
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📩 **To Apply, Please Share:**
1. Email ID
2. Total years of backend engineering experience
3. Relevant Java, Kotlin, and Python experience
4. **Payments / Fintech / Billing domain experience (Must-have)**
5. **Production experience with payment flows: charges, refunds, disputes, and webhooks**
6. Experience with REST, GraphQL, microservices, and distributed systems
7. MySQL, GitLab CI/CD, and automated testing experience
8. Current CTC / Expected CTC
9. Notice period / Earliest joining date
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Work arrangement
Yes