Backend Engineer

The Role of a Backend Engineer at Calyptus

We are seeking an experienced Backend Engineer excited to build the technical backbone of a new generation travel platform. This role involves designing and implementing scalable, resilient backend services using Java and Spring Boot. You will utilize databases such as MySQL, MongoDB, and ElasticSearch to power critical functionalities like search, personalization, and booking flows. Familiarity with Linux systems, AWS, and microservices architecture is essential for shipping reliable systems at scale.

Core Responsibilities

• Design, develop, and scale backend systems using Java and Spring Boot.
• Create low-latency search infrastructure, including ElasticSearch, caching, and query optimization.
• Build and maintain robust supplier integrations across hotels, chains, and experiences, ensuring stability and fault tolerance.
• Implement real-time personalization and ranking logic to enhance customer discovery and booking conversion.
• Enable AI-powered experiences by building APIs, data pipelines, and scalable systems for recommendations, personalization, and conversational interfaces.
• Develop and maintain database schemas, queries, and stored procedures for MySQL, MongoDB, and ElasticSearch.
• Deploy and optimize services on Linux and AWS environments, leveraging services like EC2, S3, RDS, Lambda, and API Gateway.
• Implement and evolve microservices architecture, designing effective APIs for communication between services.
• Monitor backend systems in production, troubleshoot issues, and deliver timely fixes.
• Collaborate with product, growth, and engineering peers to translate customer needs into effective backend solutions.
• Participate actively in code reviews, debugging processes, and documentation to ensure high quality and maintainability.
• Stay current with new backend and AI technologies, contributing innovative ideas for innovation and scale.

Candidate Requirements

• Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related technical field.
• 2–5 years of dedicated backend development experience with Java and Spring Boot.
• Strong knowledge of relational (MySQL) and NoSQL (MongoDB) databases, including expertise in designing efficient schemas, queries, and stored procedures.
• Familiarity with ElasticSearch and a keen interest in developing low-latency search systems.
• Hands-on experience with Linux systems and deploying/maintaining backend services in production environments.
• Proven experience with AWS services such as EC2, S3, RDS, Lambda, and API Gateway for cloud-native deployments.
• Comprehensive understanding of microservices architecture and demonstrated experience designing and implementing APIs for seamless service communication.
• Strong problem-solving and analytical skills, with a focus on delivering scalable, reliable, and high-performance solutions.
• Excitement to contribute to an AI-first company, building systems that power personalization, recommendations, and AI-driven experiences at scale.
• Excellent communication skills and the ability to collaborate effectively across product, growth, and engineering teams.

Key skills/competency

• Java Development
• Spring Boot
• Microservices Architecture
• Database Management
• AWS Cloud Services
• API Design
• ElasticSearch
• System Scalability
• AI Integration
• Linux Systems