Backend Software Engineer

Loyverse are hiring Backend Engineer to work on mission-critical backend services that power our POS ecosystem — APIs, dataservers, billing, and integrations. The role involves maintaining and extending existing systems, building new features, improving observability, and taking part in support duty.

We are looking for engineers with proven production experience, who can take ownership of initiatives, drive end-to-end development, communicate effectively with cross-functional teams, write clean, testable code, and thrive in a continuous delivery, fast-paced release cycle environment.

Responsibilities

• Maintain and evolve backend services (Spring Boot, Netty) in real production systems.
• Ensure high code quality through clean code practices, unit testing, and integration testing (JUnit, Testcontainers).
• Take ownership of features and initiatives — from design through development, testing, deployment, and monitoring.
• Participate in support duty rotation to keep services reliable.
• Improve observability & monitoring (metrics, tracing, logging) for faster incident response.
• Drive cross-team communication to align development with product and operations.
• Contribute to continuous delivery pipelines and ensure smooth weekly releases.

• At least 5+ years of Backend Engineering experience
• Proven hands-on experience (3+ years) in production systems with Java or Kotlin (we are a Kotlin-first team).
• Strong debugging, problem-solving, and communication skills.
• Strong knowledge of RDBMS (Aurora MySQL 8) — transactions, indexing, query optimization.
• Expertise in clean code, testable architecture, and continuous delivery.
• Solid experience with distributed systems (Redis, Memcached, SQS).
• Familiarity with fast-paced release cycles and agile environments.
• Monitoring experience with tools like Grafana, New Relic, CloudWatch.
• Cloud knowledge: AWS services (ECS, S3, CloudWatch).
• Experience designing and consuming REST APIs and familiarity with OAuth2 flows.
• Fluent in English.

• Experience with NoSQL (MongoDB or similar).
• Familiarity with CQRS / event-driven architectures.
• Knowledge of containerized deployments (Docker, ECS, Kubernetes).
• Experience with support duty / on-call rotations.