AI Developer

Job Description – Senior Java Developer (Spring Boot / Microservices)

Location: Chennai, India

Experience: 4+ Years

Availability: Immediate Joiner

About the Role:

We are looking for a highly skilled Java Developer with over 5 years of hands-on experience in building scalable backend systems using Java, Spring Boot, and Microservices architecture. The ideal candidate will have strong problem-solving skills, deep knowledge of backend frameworks, and a solid understanding of JUnit-based testing.

Key Responsibilities:

• Design, develop, and maintain high-performance backend systems using Java and Spring Boot
• Develop and deploy RESTful microservices in a distributed architecture
• Collaborate with cross-functional teams to define, design, and ship new features
• Write clean, scalable, and testable code following best practices
• Implement unit and integration tests using JUnit and other testing frameworks
• Participate in code reviews and contribute to improving team processes
• Troubleshoot and resolve production issues in a timely manner

Key Skills:

• Strong proficiency in Java
• Expertise in Spring Boot and related modules (Spring Data, Spring Security, etc.)
• Solid understanding of Microservices architecture, REST APIs, and inter-service communication
• Experience with JUnit and writing automated test cases
• Familiarity with CI/CD pipelines and version control (Git)
• Knowledge of containerization (Docker, Kubernetes) is a plus
• Exposure to messaging systems like Kafka or RabbitMQ is a plus
• Familiarity with databases (SQL/NoSQL)

About Sun King

Sun King is the world’s leading off-grid solar energy company, delivering energy access to 1.8 billion people without reliable grid connections through innovative product design, fintech solutions, and field operations.

Key highlights:

• Connected over 20 million homes to solar power across Africa and Asia, adding 200,000 homes monthly.
• Affordable ‘pay-as-you-go’ financing model; after 1-2 years, customers own their solar equipment.
• Saved customers over $4 billion to date.
• Collect 650,000 daily payments via 28,000 field agents using mobile money systems.
• Products range from home lighting to high-energy appliances, with expansion into clean cooking, electric mobility, and entertainment.

With 2,800 staff across 12 countries, our team includes experts in various fields, all passionate about serving off-grid communities.

Diversity Commitment:

44% of our workforce are women, reflecting our commitment to gender diversity.

About the role:

Sun King is looking for a self-driven Infrastructure engineer, who is comfortable working in a fast-paced startup environment and balancing the needs of multiple development teams and systems. You will work on improving our current IAC, observability stack, and incident response processes. You will work with the data science, analytics, and engineering teams to build optimized CI/CD pipelines, scalable AWS infrastructure, and Kubernetes deployments.

What you would be expected to do:

• Work with engineering, automation, and data teams to work on various infrastructure requirements.
• Designing modular and efficient GitOps CI/CD pipelines, agnostic to the underlying platform.
• Managing AWS services for multiple teams.
• Managing custom data store deployments like sharded MongoDB clusters, Elasticsearch clusters, and upcoming services.
• Deployment and management of Kubernetes resources.
• Deployment and management of custom metrics exporters, trace data, custom application metrics, and designing dashboards, querying metrics from multiple resources, as an end-to-end observability stack solution.
• Set up incident response services and design effective processes.
• Deployment and management of critical platform services like OPA and Keycloak for IAM.
• Advocate best practices for high availability and scalability when designing AWS infrastructure, observability dashboards, implementing IAC, deploying to Kubernetes, and designing GitOps CI/CD pipelines.

You might be a strong candidate if you have/are:

• Hands-on experience with Docker or any other container runtime environment and Linux with the ability to perform basic administrative tasks.
• Experience working with web servers (nginx, apache) and cloud providers (preferably AWS).
• Hands-on scripting and automation experience (Python, Bash), experience debugging and troubleshooting Linux environments and cloud-native deployments.
• Experience building CI/CD pipelines, with familiarity with monitoring & alerting systems (Grafana, Prometheus, and exporters).
• Knowledge of web architecture, distributed systems, and single points of failure.
• Familiarity with cloud-native deployments and concepts like high availability, scalability, and bottleneck.
• Good networking fundamentals — SSH, DNS, TCP/IP, HTTP, SSL, load balancing, reverse proxies, and firewalls.

Good to have:

• Experience with backend development and setting up databases and performance tuning using parameter groups.
• Working experience in Kubernetes cluster administration and Kubernetes deployments.
• Experience working alongside sec ops engineers.
• Basic knowledge of Envoy, service mesh (Istio), and SRE concepts like distributed tracing.
• Setup and usage of open telemetry, central logging, and monitoring systems.

What Sun King offers:

• Professional growth in a dynamic, rapidly expanding, high-social-impact industry.
• An open-minded, collaborative culture made up of enthusiastic colleagues who are driven by the challenge of innovation towards profound impact on people and the planet.
• A truly multicultural experience: you will have the chance to work with and learn from people from different geographies, nationalities, and backgrounds.
• Structured, tailored learning and development programs that help you become a better leader, manager, and professional through the Sun King Center for Leadership.

Job Description:

• Monitor entire field and DC network, ensure smooth operations for various NMS systems
• Ensure timely alerts in case of any events or parameters crossing threshold
• Ensure timely publishing of relevant reports and statistics
• Keep NMS database updated as per network evolution
• Plan and upgrade HW capacity, SW version, redundancy, connectivity with network elements and other applications as required
• Test and deploy bug fixes, new features/products related to NMS applications
• Quickly troubleshoot any issues with NMS systems and provide RCA, implement AIs
• Analyse and assist business and tech teams with new data analytics
• Vendor relationship management for issues, upgrade, new product evaluation etc.
• Manage connectivity, capacity and redundancy for all applications & network
• Prepare and Maintain SOPs of critical Process; perform Process Correction on requirement basis.

Requirements:

1. Should have years of work experience in Telco / ISP background
2. Must have hands on experience in network monitoring and managing corresponding systems/tools
3. Must have in depth understanding of SNMP and various parameters to be monitored for smooth network operations and troubleshooting
4. Should have good understanding of TCP/IP, networking, switching and routing
5. Should have good understanding of MSSQL, MySQL DB, Windows server, basic OS & virtualization concepts
6. Should be good in at least one scripting language like Python
7. Should have work experience on Solarwinds or similar leading NMS system
8. Should have experience in planning and operations of distributed L3 network
9. Should be available 24*7 for emergency situations
10. Should be able to work in very late night for planned activities
11. CCNA/CCNP Certification is Preferred.
12. Understanding of FTTH, GPON & Wifi concepts is an advantage
13. Must have done BE/B.Tech or equivalent in Computer Engineering/Electronics & Communication Engineering/Electronics & Electrical Engineering