Develop and own highly scalable backend services for IoT, order, and payment systems. Responsibilities include Java and Python development, distributed systems design, database and cache optimization, event-driven architectures, production troubleshooting, observability, incident response, reliability improvements, and collaboration with Infrastructure, QA, and Product teams.
Job location: Hybrid, Gurugram
About the role:
Our backend systems process millions of transactions, serve enterprise customers across industries, and must perform flawlessly under pressure. We are scaling fast and the decisions made at the architecture level today will define how the platform operates for years. We are hiring a Lead Backend Engineer to own that responsibility.
You will work on defining and implementing complex technical problems for core backend services, resolve ambiguity in complex distributed systems, engage directly with Product and infrastructure peers. Your decisions will have a measurable impact on system reliability and platform capabilities.
We are looking for an engineer who has operated at this level before, someone who grasps existing systems, is ready to explore and implement new technologies and is ready to take full ownership.
About the role:
Our backend systems process millions of transactions, serve enterprise customers across industries, and must perform flawlessly under pressure. We are scaling fast and the decisions made at the architecture level today will define how the platform operates for years. We are hiring a Lead Backend Engineer to own that responsibility.
You will work on defining and implementing complex technical problems for core backend services, resolve ambiguity in complex distributed systems, engage directly with Product and infrastructure peers. Your decisions will have a measurable impact on system reliability and platform capabilities.
We are looking for an engineer who has operated at this level before, someone who grasps existing systems, is ready to explore and implement new technologies and is ready to take full ownership.
What you will be expected to do
- Develop, enhance, and maintain backend services for existing IOT, proprietary , Order and Payment Management systems running at scale.
- Write clean, efficient, and highly reliable code using Java and python.
- 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.
- Strong fundamental knowledge of LLD and 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 Infra, QA, and Product teams to support smooth 24×7 production operations.
- Own production health: monitoring, alerting, performance tuning, and observability
- Lead incident response and root cause analysis (RCA) for critical system failures
- Drive proactive improvements to reduce incident frequency and blast radius
- Ensure systems meet SLAs under high-volume, production-grade conditions
- 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.
- Raise the engineering bar through code reviews, documentation standards, and knowledge sharing.
You might be a strong candidate if you have/are
- Bachelor’s degree in Computer Science, Engineering, or equivalent experience.
- 3+ years of experience building and maintaining backend systems in production environments.
- Strong proficiency in Java and python with hands-on experience in microservices.
- Solid fundamentals of data structures, algorithms, and problem solving.
- Experience building and consuming RESTful APIs and working with asynchronous systems.
- Strong debugging and troubleshooting skills in live production systems.
- Good knowledge of software engineering best practices, including testing, code reviews, CI/CD, and release management.
- Clear communication skills and ability to collaborate effectively within a team.
- Hands-on experience with Kafka or similar messaging/event-streaming platforms.
- Exposure to distributed systems, microservices architecture, and scaling strategies.
- Experience with Kubernetes in production environments
- Cloud platform experience (AWS, Azure, or GCP)
- Caching with Redis: caching strategies, cache invalidation patterns
- Exposure to SRE or platform engineering practices
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 is the world’s leading off-grid solar energy company, combining cutting-edge product design, fintech, and field operations to deliver energy access for the 1.8 billion people who live without an affordable and reliable electric-grid connection.Sun King has built a new kind of energy utility: distributed, green, customer-centric, and affordable. We bring clean, reliable, decentralized energy directly into people’s lives — from solar kits that provide first-time energy access to multi-kilowatt systems that serve both off-grid users and grid-connected customers powering larger homes, schools, hospitals, farms, offices, and light manufacturing.Already, 25 million homes and businesses rely on Sun King for electricity supply and the appliances and services it enables: lighting, televisions, fans, refrigeration, and smartphones. Sun King combines energy generation, energy-efficient appliances, installation, and financing into one seamless offering. Think of it as a distributed utility, designed for wherever energy is needed and designed to scale with its users as incomes and energy needs grow.Sun King makes solar products affordable to low-income households and businesses via ‘pay-as-you-go’ (PAYG) purchase financing. Sun King installs solar after customers pay a small deposit. Customers then make small, manageable payments of as little as US $0.14 a day via mobile money or cash.Instead of paying for expensive, polluting, and health-damaging kerosene for lighting or diesel for power, customers unlock savings through accessing solar power and after one to two years of payments, customers own their solar equipment outright.Sun King collects payments digitally through mobile money systems and its 35,000 field agents — over 1 million payments each day. To date, Sun King has extended more than $1.4 billion in PAYG loans to customers.Sun King began by powering homes and businesses with solar systems delivered through PAYG financing. Now, we’re using the same model to make smartphones and clean cooking equipment affordable: helping households connect to the digital economy and transition from wood-based fuels to modern, sustainable alternatives.Sun King employs 3,500 full-time staff in 14 countries, with specialties spanning product design, data science, logistics, customer service, sales, software, operations, and more — all with a passion to serve off-grid families. Sun King is committed to gender diversity in the workplace. Women represent 42% of Sun King’s workforce.
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