Sun King

Off-grid solar home systems provider

Software Engineer 3 – Backend

Backend EngineeringUpdated on Nov 13

Full-timeRemote in IndiaNo salary listed

About the Job

Requirements

At least 4 years of experience with Java and Python, including hands-on expertise with Spring Boot and Django or FastAPI.
Expertise in AWS, including Lambda, SQS, S3, EC2 (Linux-based virtual machines), load balancers, and RDS.
Expertise in SQL, including query plans, indexing, locking, primary–replica architecture, and schema changes on live tables.
Prior experience working with Redis.
Experience with microservices and distributed, event-driven system design, including webhooks, queues, and third-party API integrations.
Observability experience with Grafana and Prometheus/Loki or an equivalent stack.
Experience running Docker in production, including images, Compose, and runtime configurations.
Working experience with message brokers and event-streaming systems such as Kafka or RabbitMQ.
Hands-on experience using AI-assisted coding tools such as Claude Code, GitHub Copilot, or Cursor in day-to-day development.

Responsibilities

Lead incident root-cause analyses, reasoning from changes against a baseline rather than from snapshots.
Write design documents and architecture maps.
Mentor engineers through code reviews and pairing.
Own systems after launch, including on-call responsibilities, runbooks, and cost.
Use AI coding assistants daily, applying judgment to review and test generated code and take ownership of it.
Design and build applications and systems from wireframes and product requirements documents.
Identify and fix bottlenecks and bugs according to operational requirements.
Design and develop logical and physical data models that meet application requirements.
Build for scalability, performance, service robustness, and cost trade-offs.
Create prototypes and proofs of concept for iterative development.
Take complete, end-to-end ownership of projects and their development cycle.

Job location: India (Remote)

About the role:

The SDE-3 Backend will work as part of the Digitization and Automation team to help Sun King design, develop,
and implement intelligent, tech-enabled solutions to help solve a large variety of our business problems. We
are looking for candidates with an affinity for technology and automation, curiosity about advances in products
and strong coding skills for our in-house software development team.

● Minimum 4+ years of experience in Java and Python, with hands-on expertise in frameworks such as
Spring Boot and Django/FastAPI.
● Expertise in AWS, with working experience in Lambda, SQS, S3, EC2 (Linux-based VMs), Load Balancer,
and RDS
● Expertise in SQL: query plans, indexing, locking, primary–replica architecture, and schema changes on
live tables
● Prior experience working with Redis
● Experience with microservices and distributed, event-driven system design: webhooks, queues, and
third-party API integrations
● Observability experience with Grafana and Prometheus/Loki, or an equivalent stack
● Experience running Docker in production (images, Compose, and runtime configs)
● Working experience with message brokers and event-streaming systems such as Kafka or RabbitMQ
● Hands-on experience with AI-assisted coding tools (e.g., Claude Code, GitHub Copilot, Cursor) in
day-to-day development

● Lead incident RCAs, reasoning from what changed against a baseline rather than from snapshots
● Write design docs and architecture maps
● Mentor engineers through code review and pairing
● Own systems after launch, including on-call, runbooks, and cost
● Use AI coding assistants every day, applying the judgement to review, test, and take ownership of the
code they help generate
● Design and build applications and systems from wireframes and product requirements documents
● Identify and fix bottlenecks and bugs according to operational requirements
● Design and develop logical and physical data models that meet application requirements
● Build for scalability, performance, service robustness, and cost trade-offs
● Create prototypes and proofs of concept for iterative development
● Take complete, end-to-end ownership of projects and their development cycle

About the Company

Sun King

Off-grid solar home systems provider

Sun King designs, manufactures, distributes, and finances solar home energy products for off-grid communities in Africa and Asia. Its range includes solar lanterns and solar home systems with inverters and storage that can power lights, radios, phones, and household appliances, all financed through a pay-as-you-go model with small mobile money installments after a low upfront payment. The company differentiates itself with an end-to-end approach—handling product design, manufacturing, distribution, and financing—supported by a large field-agent network and strategic acquisitions like PayGo Energy to expand into clean cooking. Its goal is to increase energy access by helping households leapfrog kerosene and unreliable grids, aiming to reach millions of homes and businesses, including over 2 million in Ethiopia by 2030.

Company size: 1,001-5,000
Company stage: Debt Financing
Total funding: $864.9M
Headquarters: Chicago, IL
Founded: 2008

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