Mandatory Technical Skills
1. Backend Development
Strong hands-on experience in Java or Kotlin
Experience designing and developing backend services and microservices
Strong understanding of:
Object-Oriented Programming
Multithreading
Collections
Exception Handling
Dependency Injection
2. REST API Development
Candidate should have hands-on experience in:
Designing REST APIs
REST principles
HTTP methods
Status codes
Authentication mechanisms
API versioning
Error handling
API debugging
3. WebSocket Knowledge
Candidates must understand:
How WebSocket connections work
WebSocket lifecycle
Handshake process
Persistent connections
Difference between REST and WebSocket communication
Connection management
Message flow
Reconnection strategies
Debugging WebSocket connectivity issues
4. Distributed Systems
Positive understanding of:
Distributed architectures
Service-to-service communication
Scalability
High availability
Event-driven architecture
Messaging concepts
Fault tolerance
5. AWS (Hands-on)
Experience with AWS services such as:
ECS/EKS
EC2
IAM
VPC
CloudWatch
S3




Load Balancers
Auto Scaling
Secrets Management
Candidate should be comfortable deploying and troubleshooting cloud-based applications.
6. DevOps / CI-CD
Hands-on experience with:
GitLab CI/CD
AWS deployment pipelines
Docker
Kubernetes
Infrastructure automation
Build pipelines
Deployment pipelines
Release management
7. Troubleshooting & Debugging
Must be comfortable investigating production issues involving:
Backend services
WebSocket communication
Network connectivity
Protocol-level issues
Performance bottlenecks
Distributed systems
8. Soft Skills
Ability to work autonomously
Comfortable making technical decisions
Strong analytical and problem-solving skills
Think outside the box
Able to work in a fast-paced environment
Good communication skills

Experience Requirement
s5 to 12 years of relevant post-qualification experienc
eProven track record in backend development and cloud infrastructur
eExperience with microservic

📌 Cloud Devops (India)
🏢 Worldline Global Services
📍 India