Backend Engineer II at HackerRank delivering high-impact features and ensuring server-side logic reliability. Collaborating with teams to optimize application performance and data integrity.
Responsibilities
Design, build, and maintain efficient, reusable, and reliable backend code to support new product features and enhancements
Develop and integrate RESTful or GraphQL APIs to serve front-end applications and external clients
Design and optimize database schemas (SQL and NoSQL) to ensure data integrity and query performance at scale
Collaborate with frontend developers, product managers, and designers to translate requirements into robust technical solutions
Troubleshoot production issues, identify bottlenecks, and drive performance optimizations across the application stack
Write comprehensive unit and integration tests to ensure high code quality and system stability
Requirements
2+ years of experience in server-side software development
Proficient in at least one modern backend programming language (e.g., Python, Ruby, Go, Java, or Node.js)
Deep understanding of API design principles (REST, GraphQL) and web standards
Strong experience with relational databases (PostgreSQL, MySQL) and familiarity with NoSQL stores
Knowledge of distributed systems, caching mechanisms (Redis/Memcached), and asynchronous messaging (Kafka/RabbitMQ)
Familiarity with containerization (Docker) and basic CI/CD workflows
Node.js Developer working on an agent for data collection and performance on a productivity platform. Collaborating with design and product teams to develop scalable software solutions.
Senior Software Engineer designing and building backend systems for PayPal’s credit products. Working on business - critical systems ensuring performance, security, and compliance across multiple countries.
Software Engineer developing backend services for PayPal's credit products. Focused on building reliable, secure solutions through RESTful APIs and microservices.
Senior Engineer managing backend automation equipment operations and optimizations within Seagate's manufacturing site in Singapore. Collaborating with cross - functional teams for efficiency and safety compliance.
Senior Software Engineer designing, building, and scaling trading APIs for financial institution. Collaborating across teams to ensure low - latency, high - quality API performance.
Software Engineer responsible for development efforts of CMiC’s Project Controls module. Writing high - quality code and participating in testing and design evaluations.
Senior Full Stack Engineer focusing on AI solutions, collaborating with teams across Ankara, Berlin, and Silicon Valley. Building tools and workflows to enhance AI agent performance in a hybrid work environment.
FullStack Java Developer transforming digital visions into reality for Uni Systems in Brussels. Involves front - end and back - end development, API design, and technological integration.
Senior Software Engineer developing and maintaining cloud - based solutions. Leading design and implementation of managed Cloud Services while collaborating with Site Reliability Engineering team.