Backend Engineer: Scalable APIs & Systems

Requirements

• Backend engineer with 2+ years of experience in server-side software development
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• Proficient in at least one modern backend programming language (e.g., Python, Ruby, Go, Java, or Node.js)
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• Deep understanding of API design principles (REST, Graph
  
  QL) and web standards
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• Strong experience with relational databases (Postgre
  
  SQL, MySQL) and familiarity with No
  
  SQL stores
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• Knowledge of distributed systems, caching mechanisms (Redis/Memcached), and asynchronous messaging (Kafka/Rabbit
  
  MQ)
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• Familiarity with containerization (Docker) and basic CI/CD workflows
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• Comfortable using AI-powered coding assistants (e.g., Git Hub Copilot, Cursor, Claude Code) as a daily part of your development workflow
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• Working familiarity with large language models — you understand what they can and can't do, and can write effective prompts to get useful outputs
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• Experience using AI tools beyond code generation — for planning, writing documentation, drafting test cases, debugging, and code review
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• Basic understanding of AI/ML fundamentals: how LLMs work at a high level (tokens, context windows, inference), common model architectures, and the difference between fine-tuning, RAG, and prompt engineering
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• You stay current with the rapidly evolving AI tooling landscape and are eager to adopt tools that meaningfully improve your productivity
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• (Desirable) Experience working on high-traffic, customer-facing web applications
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• (Desirable) A strong grasp of system design concepts and architectural patterns (e.g., Microservices, DDD)
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• (Desirable) Familiarity with cloud computing platforms (AWS, GCP, or Azure) and serverless technologies
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• (Desirable) Experience optimizing legacy codebases for performance and maintainability
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• (Desirable) You are passionate about shipping high-quality code that directly solves user problems
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• (Desirable) You take ownership of your work, from initial design through to deployment and monitoring
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• (Desirable) You enjoy breaking down complex requirements into clean, logical, and scalable technical implementations
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• (Desirable) You value collaboration and actively contribute to code reviews and architectural discussions

• Every day, millions of developers use Hacker Rank to prove their skills
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• We’re looking for a Backend Software Development Engineer who thrives on solving complex architectural problems and delivering high-impact product features
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• You will be responsible for the server-side logic, database architecture, and the integration of front-end elements
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• Your work will ensure that our core application remains fast, reliable, and scalable as we continue to grow our global user base
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• Design, build, and maintain efficient, reusable, and reliable backend code to support new product features and enhancements
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• Develop and integrate RESTful or Graph
  
  QL APIs to serve front-end applications and external clients
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• Design and optimize database schemas (SQL and No
  
  SQL) to ensure data integrity and query performance at scale
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• Collaborate with frontend developers, product managers, and designers to translate requirements into robust technical solutions
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• Troubleshoot production issues, identify bottlenecks, and drive performance optimizations across the application stack
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• Write comprehensive unit and integration tests to ensure high code quality and system stability