Java
Spring Boot
Elastic Search
Amazon Web Services (AWS)About the role:
We are looking for a Backend Engineer to join a mature, scaled product platform that is already serving business-critical workflows. This role focuses on enhancing existing backend systems, improving reliability, performance, and scalability, and building new features on top of a well-established architecture.
The ideal candidate is strong at writing production-quality code, debugging complex distributed systems, and knowledgeable about how design decisions impact scalability, availability, and long-term maintainability. You will work closely with cross-functional teams to ensure the platform continues to perform reliably at scale while evolving with business needs.
What you will be expected to do:
- Develop, enhance, and maintain backend services for existing user, inventory, pricing, order, and payment management systems running at scale.
- Write clean, efficient, and highly reliable code using Java 8 and above and Spring Boot 2.7 and above.
- Own and improve production systems with a strong focus on performance, scalability, availability, and fault tolerance.
- Debug and resolve complex production issues involving services, databases, caches, and messaging systems.
- Contribute to low-level design (LLD) and actively participate in high-level architecture (HLD) discussions for new features and system improvements.
- Work with event-driven and asynchronous architectures, ensuring correctness and reliability of data flows.
- Optimize database schemas, queries, indexing strategies, and caching layers for high-throughput workloads.
- Partner with DevOps, QA, and Product teams to support smooth 24×7 production operations.
- Participate in code reviews, design reviews, and incident post-mortems to continuously improve system quality.
- Take end-to-end ownership of backend components, from design and implementation to deployment and production support.
You might be a strong candidate if you have/are:
- Bachelor’s degree in computer science, engineering, or equivalent experience.
- 2+ years of experience building and maintaining backend systems in production environments.
- Strong proficiency in Java with hands-on experience in Spring Boot–based microservices.
- Solid knowledge of data structures, algorithms, and backend problem solving.
- Strong experience with PostgreSQL or other relational databases in high-scale systems.
- Experience building and consuming RESTful APIs and working with asynchronous systems.
- Strong debugging and troubleshooting skills in live production systems.
- Good understanding of software engineering best practices, including testing, code reviews, CI/CD, and release management.
- Clear communication skills and the ability to partner effectively within a team.
- Hands-on experience with Kafka or similar messaging/event-streaming platforms.
- Exposure to distributed systems, microservices architecture, and scaling strategies.
Good to have:
- Experience using Redis, Elasticsearch, and MongoDB in production systems.
- Experience with monitoring, logging, and observability tools (e.g., Prometheus, Grafana, ELK).
- Familiarity with cloud infrastructure and containerized environments (Docker, Kubernetes).
- Experience participating in on-call rotations and handling production incidents.
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.
About Sun King
Sun King is a leading off-grid solar energy company providing affordable, reliable electricity to 1.8 billion people without grid access. Operating across Africa and Asia, Sun King has connected over 20 million homes, adding 200,000 homes monthly.
Through a ‘pay-as-you-go’ model, customers make small daily payments (as low as $0.11) via mobile money or cash, eventually owning their solar equipment and saving on costly kerosene or diesel. To date, Sun King products have saved customers over $4 billion.
With 28,000 field agents and embedded electronics that regulate usage based on payments, Sun King ensures seamless energy access. Its products range from home lighting and phone charging systems to solar inverters capable of powering high-energy appliances.
Sun King is expanding into clean cooking, electric mobility, and entertainment while serving a wide range of income segments.
The company employs 2,800 staff across 12 countries, with women representing 44% of the workforce, and expertise spanning product design, data science, logistics, sales, software, and operations.
Shubham Vishwakarma
Full Stack Developer - Averlon
About Sun King
About
Sun King is a leading global provider of off-grid solar energy solutions, designed to serve the 1.8 billion people who lack reliable or affordable access to traditional electrical grids. With a mission to power brighter lives, the company focuses on underserved markets across Africa and Asia. Sun King's product range includes solar lanterns, solar home systems, and solar inverters, tailored to meet a variety of energy needs—from portable lighting to powering entire homes.
The company's innovative solutions, such as the recently launched PowerHub 3300 and expandable solar home systems, reflect their commitment to evolving customer demands. With operations in over 40 countries and millions of products sold, Sun King makes solar energy accessible through pay-as-you-go financing options. The company’s network of field agents plays a key role in selling, installing, and servicing products, driving local economic development. Rooted in sustainability, Sun King also implements a Sustainable Financing Framework and ensures customer satisfaction through extensive service centers and after-sales support.
Company video
Candid answers by the company
Sun King designs, distributes, installs, and finances solar energy solutions for the 1.8 billion people living without reliable access to electricity. The company offers a range of products from portable solar lamps to powerful home and business energy systems, aiming to improve lives across Africa and Asia through affordable, clean energy.
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Full Stack Developer - Averlon