Kotlin Engineer

We are seeking a Senior Software Engineer with strong expertise in Kotlin, Micronaut, and Kafka to support mission-critical services within our backend systems. The ideal candidate is a hands-on problem solver with a solid background in observability, metrics-driven development, and automated testing. You'll join a high-performing engineering team to deliver backend services that are scalable, observable, and resilient - ensuring high performance and operational excellence.

• Build and maintain cloud-native services in Kotlin, leveraging the Micronaut framework for high efficiency and performance.
• Design and implement Kafka-based event-driven systems for scalable, asynchronous data processing.
• Integrate observability best practices, including metrics instrumentation, structured logging, and distributed tracing to enhance visibility and reliability.
• Lead the development and automation of unit, integration, and contract testing frameworks to ensure production readiness.
• Collaborate closely with Target engineering teams and product managers to deliver secure and scalable software solutions.
• Participate in technical design discussions and contribute to architectural decisions.
• Work independently while following Target's engineering best practices, standards, and workflows.

• 5+ years of professional experience in backend software development, in a large-scale or enterprise setting.
• Strong proficiency in Kotlin.
• Hands-on experience with Micronaut or Spring Boot.
• Solid knowledge of Apache Kafka, including producers, consumers, and stream processing.
• Experience implementing and managing observability tools (e.g., OpenTelemetry, Grafana).
• Proficient in test-driven development with tools like K6, JUnit.
• Proficient with container technologies and orchestrators.
• Strong communication skills and experience working in cross-functional teams.
• A passion for clean, maintainable code and system reliability

• Experience working as a contractor or consultant in a similar enterprise environment.
• Familiarity with Git-based workflows, and Agile methodologies.
• Exposure to cloud environments (AWS, Google Cloud Platform, Azure).
• Knowledge of advanced architectural patterns such as event sourcing or CQRS.
• Hands-on experience in building and maintaining automated end-to-end test suites for enterprise-scale applications, with emphasis on cross-team integration and CI/CD pipeline execution.
• Experience in developing or integrating intelligent systems, including those involving machine learning models, data-driven decision making, or natural language understanding.

Equal Opportunity Employer: Race, Color, Religion, Sex, Sexual Orientation, Gender Identity, National Origin, Age, Genetic Information, Disability, Protected Veteran Status, or any other legally protected group status.

At Randstad Digital, we welcome people of all abilities and want to ensure that our hiring and interview process meets the needs of all applicants. If you require a reasonable accommodation to make your application or interview experience a great one, please contact

Pay offered to a successful candidate will be based on several factors including the candidate's education, work experience, work location, specific job duties, certifications, etc. In addition, Randstad Digital offers a comprehensive benefits package, including health, an incentive and recognition program, and 401K contribution (all benefits are based on eligibility).

This posting is open for thirty (30) days.