Senior Java Developer

Role Overview We are seeking an exceptionally skilled and driven Senior Java Backend Developer to anchor the core platform. This role is critical to architecting and delivering a hyper-scalable, low-latency, and distributed system capable of supporting millions of concurrent users and high-velocity data flow. You will take extreme ownership of mission-critical services, aiming to set a new standard. This platform must be designed for cloud-agnostic deployment from day one. Key Responsibilities ● Architecture & Design: Design, develop, and maintain high-performance, resilient, and fault-tolerant backend services and APIs using Java and Spring Boot/Quarkus. ● Microservices Implementation: Drive the decomposition and development of services within a microservices architecture, focusing on clear contract definition, service mesh integration, and inter-service communication patterns (e.g., gRPC, REST). ● Real-Time & Low Latency: Implement and optimize real-time, bi-directional communication channels (e.g., WebSockets, MQTT) for instantaneous data synchronization and persistent connection management for millions of mobile clients. ● Database & Data Flow: Design and optimize data models and persistence layers, integrating with high-volume, low-latency databases like Cassandra, ScyllaDB, or Aerospike for primary data storage, and ensuring efficient caching and read/write performance. ● Scalability & Resilience: Implement advanced techniques for horizontal scaling, distributed transactions, circuit breakers, and load balancing to ensure 99.99% uptime and operational resilience. ● Ability to perform Research / POCs & choose the suitable technology. Required Expertise (2-4Years Experience Focus) ● Core Java & Frameworks: 2-4 years of hands-on experience in Java, with deep, production-grade expertise in Spring Boot (or equivalent, e.g., Quarkus/Micronaut) for building RESTful and event-driven services. ● Distributed Systems: Proven experience designing and implementing scalable services within a distributed system/microservices architecture, including experience with service discovery and configuration management. ● Concurrency & Performance: Mastery of Java concurrency primitives and advanced performance tuning (JVM optimization, garbage collection tuning, thread pool management) to achieve sub-100ms P95 latency. ● Messaging & Eventing: Expert knowledge of and hands-on experience with high-throughput message brokers like Apache Kafka or RabbitMQ for handling high-velocity data, notifications, and background processing. ● Database Expertise: Deep practical experience with at least one NoSQL distributed database (e.g., Cassandra, ScyllaDB, or Aerospike) and strong SQL proficiency (e.g., MySQL, Postgres), including complex query optimization and schema evolution. ● Testing & Quality: Proven ability to write high-quality, well-tested code, utilizing frameworks like JUnit, Mockito, and focusing on unit, integration, and performance testing. Scalability & Performance Expectations ● User Volume: Successfully design and scale the application backend to handle millions of concurrent, persistent mobile connections. ● Latency Goal: Services must be tuned for P95 latency of less than 100 milliseconds for critical operations like data sync and status updates. ● Cloud-Agnostic Design: Demonstrate experience designing applications for a truly cloud-agnostic environment, utilizing containerization (Docker, Kubernetes) and abstracting infrastructure dependencies to allow seamless migration between AWS, GCP, or Azure. ● Monitoring & Observability: Strong experience implementing and utilizing a robust observability stack (e.g., Prometheus/Grafana, ELK/Loki, distributed tracing like Jaeger/Zipkin) to profile performance and rapidly diagnose production issues. Startup Mindset & Delivery Goals ● Extreme Ownership: Ability to own a feature end-to-end, from architectural design and coding to deployment and post-launch monitoring, taking full responsibility for its success and reliability. ● Collaboration & Iteration: Thrive in a fast-paced, iterative environment, collaborating closely with mobile developers, product managers, and cloud engineers. ● Impact Focus: A strong bias for action, prioritizing work that directly impacts product

Core Focus:

• Operate with a full DevOps mindset, owning the software lifecycle from development through production support.
• Participate in Agile ceremonies and global team collaboration, including on-call support.

Mandatory/Strong Technical Skills (6–8+ years of relevant experience required):

• Java: 4.5 to 6.5 years experience
• AWS: Strong knowledge and working experience with Cloud technologies minimum 2 years.
• Kafka: 2 years of Strong knowledge and working experience with data integration technologies
• Databases: Experience with SQL/NoSQL databases (e.g., Postgres, MongoDB).

Other Key Technologies & Practices:

• Python, Spring Boot, and API-based system design.
• Containers/Orchestration (Kubernetes).
• CI/CD tools (Gitlab, Splunk, Datadog).
• Familiarity with Terraform and Airflow.
• Experience in Agile methodology (Jira, Confluence).

• Experience of more than 4 to 6 years in software development.
• Very Strong Experience in Core Java.
• Excellent Java Programming skills Experience in Data Structures, Algorithms and Design Patterns.
• Strong in Problem solving, Analytical skill and logical thinking.
• Skill to be trained: java, spring, mango db, cassandra.
• Strong experience in Spring Boot, Restful API
• Looking for shorter notice period candidates only.

1. Interested in exploring integration technologies 
2. Understand the business complexities of airline & hotel domain and system integration, their business process
3. Explore new technology stacks for integration and 
4. Many more opportunities .

JEE Technologies: Java,Servlet

Database: SQL.JDBC

Tools : GIT

Web Services: REST based API or XML based web services

Others : design Patterns, UML

We are a Fintech Start up targeting to capture $ 900 BN consumer payment &lending opportunity. We are building platform of the future in which the offline / online merchants would be able to expand their consumer base. We also empower merchants to collect payment digitally and help build their identity through our offerings.

Consumers would be able to make their purchase decisions and would get the options to convert their purchases in to easy EMIs

• Developing front end website architecture
• Designing user interactions on web pages
• Developing back end website applications
• Creating servers and databases for functionality
• Ensuring cross-platform optimization for mobile phones
• Ensuring responsiveness of applications
• Working alongside graphic designers for web design features
• Seeing through a project from conception to finished product
• Designing and developing APIs
• Meeting both technical and consumer needs
• Staying abreast of developments in web applications and programming languages.

• Java 8 and above
• Experiencein databases Mongodb, MySQL, SQL Oracle etc.
• Working knowledge in IOC Container / Spring boot& ORM, Spring Security, AOP JMS.
• Experience in Microservices, Eureka, Zuul, Ribbon would be an added advantage.
• Experience with build tools like Ant, Gradle or Maven and troubleshoot build issues.
• Should have exposure to GIT, Jira etc..
• Develops resealable frameworks/components and POCs based on Product Architecture RoadMap.
• Uses best practices during web services implementations and works with the REST
• Strong analytic problem-solving skills.
• Proactive work ethic.