Hybrid Senior Backend Engineer

at Umpisa Inc

• Job title: Senior Backend Engineer
• Job type: Full Time
• Experience level: Senior
• Salary: Not specified
• Degree requirement: Bachelor's Degree
• Tech skills: Apache, Distributed Systems, Docker, GraphQL, JavaScript, Kafka, Microservices, MongoDB, Node.js, Postgres, Python, RabbitMQ, Redis, TypeScript
• Location requirements: Hybrid, Pasay City, Philippines

About the role

• Senior Backend Engineer responsible for designing and scaling secure backend systems for financial transactions. Contributing architectural decisions and mentoring engineers in fintech environment.

Responsibilities

• **Summary:**
• We are seeking a highly experienced Senior Backend Engineer with strong expertise in fintech and banking systems. The ideal candidate has deep experience designing, building, and scaling secure, high-performance backend systems that handle financial transactions, payment processing, and distributed workloads.
• You will take ownership of critical backend services, contribute to architectural decisions, mentor engineers, and ensure systems are scalable, secure, compliant, and production-ready. This role requires strong hands-on development skills combined with architectural leadership in high-availability financial environments.
• **Key Responsibilities:**
• 1. Technical Expertise
• Programming & Backend Development
• Strong proficiency in JavaScript / TypeScript
• Extensive hands-on experience with Node.js and NestJS
• Working knowledge of Python (optional but advantageous)
• Build modular, maintainable, and testable backend services following clean architecture principles
• Database Engineering
• Design and optimize high-performance databases:
• PostgreSQL (transactions, indexing, query optimization, ACID compliance)
• MongoDB (document modeling, performance tuning)
• Redis (caching, session storage, performance acceleration)
• Implement data consistency, idempotency, and transactional integrity for financial systems
• API & Integration
• Design and implement secure, scalable RESTful APIs
• Familiarity with GraphQL (plus)
• Implement authentication, authorization, rate limiting, and API versioning
• Integrate with internal and external financial systems
• Messaging & Event-Driven Architecture
• Build distributed systems using:
• Apache Kafka
• RabbitMQ
• Implement asynchronous processing, event streaming, and high-throughput transaction flows
• System Architecture & Scalability
• Architect and maintain:
• Microservices-based systems
• Distributed systems
• Composable backend architectures
• Design systems capable of handling high TPS (transactions per second)
• Ensure fault tolerance, observability, and horizontal scalability
• Containerization & DevOps
• Containerize services using Docker
• Support CI/CD pipelines and automated deployments
• Work with Git-based workflows for version control and collaboration
• Payments & Financial Systems
• Design and maintain payment logic flows
• Implement transaction validation, reconciliation, and status reporting
• Ensure idempotency and consistency in financial transaction processing
• Apply best practices for high-reliability financial systems
• Code Quality & Engineering Excellence
• Write clean, maintainable, well-documented code
• Enforce coding standards and perform code reviews
• Promote automated testing and continuous integration
• Mentor junior engineers and elevate team standards
• 2. Project Leadership & Delivery
• Lead backend projects from architecture to production deployment
• Provide accurate technical estimations and sprint planning inputs
• Participate actively in Agile/Scrum ceremonies
• Maintain comprehensive documentation for APIs and architecture
• Ensure timely delivery of features and production fixes
• 3. Security & Compliance
• Implement industry-standard security best practices:
• Encryption (in transit and at rest)
• Authentication & Authorization
• Secure API design
• Support compliance requirements relevant to fintech/banking environments
• Ensure secure coding practices across all services
• 4. Performance & Reliability
• Optimize database queries and backend performance
• Reduce latency and improve system throughput
• Diagnose and debug complex distributed system issues
• Maintain high system uptime and reliability
• 5. Collaboration & Communication
• Collaborate with frontend engineers, QA, DevOps, and product teams
• Translate technical concepts into business-friendly communication
• Provide technical guidance and mentorship to engineers

Requirements

• **Qualifications**:
• 10+ years of backend engineering experience
• Strong hands-on experience with:
• Node.js
• TypeScript
• NestJS
• PostgreSQL
• MongoDB
• Redis
• Apache Kafka
• RabbitMQ
• Docker
• Git
• Proven experience in fintech, payments, or banking systems.
• Strong understanding of:
• Microservices architecture
• Distributed systems
• High-availability systems
• Scalable transaction processing
• Experience working in Agile/Scrum environments
• **Preferred Experience:**
• Experience with GraphQL
• Experience handling high TPS financial systems
• Experience implementing ISO 20022 or financial messaging integrations (plus)
• Experience designing payment gateways or core banking integrations
• **Soft Skills:**
• Strong leadership and mentorship capabilities
• Excellent communication and stakeholder management skills
• Strong analytical and problem-solving mindset
• Ability to thrive in fast-paced fintech environments
• High ownership and accountability