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Senior API Backend Developer

Finzly
Chennai, Tamil Nadu

Apply Now

Job details

Qualifications

Spring Boot
CI/CD
JUnit
Cucumber (software testing tool)
System design
Performance testing
Java
Microservices
Administrative experience
SQL
Docker
Distributed systems
Continuous integration
Redis
Back-end development
JPA
REST
Scrum
APIs
Agile
Financial services
Maven
Spring framework

Full job description

Senior API Backend Developer

Location
India – Chennai

Work Format
In-office

Experience level
5+ years

About Finzly:

Headquartered in Charlotte, NC, and founded in 2012 by visionary minds shaping the future of banking and payments in the US, Finzly makes bank transformation radically simple. Our core-independent platform is trusted by some of the market’s leading financial institutions to transform operations and launch new products and services at speed.

We’ve been recognized with 20+ industry awards in the last two years – including three years in a row as one of the Best and Brightest Places to Work as well as accolades for Best Parallel Core Technology, Best Corporate Payments Solution, Best Payments-as-a-Service Provider, and Best Trading System. Quite simply, Finzly is known for being the best in everything we do, giving you the perfect opportunity to grow your career with impact.

About the Role:

We are seeking a highly experienced Senior API Backend Developer to architect, design, and build scalable, high-performance microservices using Spring Boot and modern distributed system principles. The role involves working on mission-critical financial systems that demand high availability, fault tolerance, security, and optimized performance.

Key Responsibilities

Microservices & Architecture

Design and develop resilient, scalable microservices using Spring Boot 3.x
Implement RESTful and asynchronous service-to-service communication
Build API gateways and orchestration layers
Implement resilience patterns such as circuit breakers, retries, distributed tracing, and event-driven architecture
Ensure system fault tolerance, observability, and horizontal scalability

REST API Development

Design and implement OpenAPI-compliant RESTful APIs
Maintain Swagger documentation and API versioning strategies
Implement API security using OAuth2, JWT, and rate limiting
Optimize API performance, validation, and request/response handling

Database & Performance Engineering

Optimize SQL queries, indexing strategies, and data access patterns
Implement caching solutions using Caffeine and Redis
Ensure distributed data consistency and transaction management
Monitor and tune performance across services

Low-Level System Design

Architect high-throughput payment processing systems
Implement efficient algorithms and rule engines (e.g., RuleBook)
Optimize memory management, concurrency handling, and garbage collection
Ensure thread safety and performance tuning in multi-threaded environments

Code Quality & DevOps

Write clean, maintainable, and testable code
Implement unit, integration, and BDD tests (JUnit 5, Mockito, Cucumber)
Maintain code coverage and quality standards using JaCoCo and SonarQube
Support Docker-based deployments and CI/CD workflows
Implement observability through logging, metrics, and tracing

Required Technical Skills

Core Technologies

Java 17+ (Java 21 preferred)
Spring Boot 3.x, Spring Security, Spring Web, Spring Cache
Maven

Microservices & Distributed Systems

RESTful API design (OpenAPI/Swagger)
API versioning and security best practices
CAP theorem and distributed transaction concepts
Service discovery and API gateway implementation

Database & Persistence

Strong SQL knowledge, query optimization, and indexing
Redis and Caffeine caching strategies
JPA and ORM best practices

Testing & Quality

JUnit 5, Mockito, TestContainers
Cucumber (BDD)
JaCoCo and SonarQube

Preferred Qualifications

Experience in financial services or payment systems
Familiarity with observability tools (Prometheus, Grafana, ELK stack)
Performance testing experience
Agile/Scrum methodology experience

Experience Requirements

5+ years of backend API development experience
3+ years of microservices architecture experience
3+ years of hands-on Spring Boot development
2+ years of SQL experience
Strong system design and performance optimization background
Experience with containerized deployments
Experience with CI/CD pipelines

Apply:

Interested candidates can send their resume to Finzly at [email protected]

Apply Now

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Senior API Backend Developer

About Finzly:

About the Role:

Key Responsibilities

Microservices & Architecture

REST API Development

Database & Performance Engineering

Low-Level System Design

Code Quality & DevOps

Required Technical Skills

Core Technologies

Microservices & Distributed Systems

Database & Persistence

Testing & Quality

Preferred Qualifications

Experience Requirements

Apply: