[Hiring] Senior Backend Developer @Lean Solutions Group

Role Description

The ideal candidate has deep JVM expertise, strong proficiency in Kotlin or Java, and recent hands-on experience with Spring Boot. This role requires someone who can design, build, troubleshoot, and operate distributed, integration-heavy systems in complex customer-controlled cloud environments.

Beyond traditional backend engineering, this position expects strong proficiency with AI-assisted software development, including daily use of Claude Code and AI-powered code-review tools. The successful candidate will be able to move quickly with AI while maintaining high engineering standards and independently validating AI-generated code for correctness, security, maintainability, test coverage, and architectural fit.

Qualifications

• 8+ years of professional backend software development, including substantial ownership of production systems.
• Bachelor's degree in Computer Science or a related field, or equivalent practical experience.
• Deep JVM experience and strong proficiency with Kotlin or Java (preferred); recent hands-on Spring Boot experience is required.
• Demonstrated ability to design, implement, and troubleshoot distributed, integration-heavy systems.
• Strong PostgreSQL and SQL skills, including schema design, query analysis, migrations, and production data investigation.
• Experience building REST APIs and asynchronous, event-driven, or batch-processing workflows.
• Experience with Docker and image creation.
• Hands-on Linux and container experience; ability to work effectively with platform engineers in customer-controlled cloud environments.
• Proficiency with the following AWS services is highly preferred: ECS or EKS, MemoryDB, RDS (Postgres), EC2, Workspace, ELB, API GW, ECR, Glue.
• Strong automated-testing discipline and practical experience with CI/CD and production release processes.
• Daily fluency with AI coding assistants, specifically Claude Code, and comfort working with AI-assisted code-review tools.
• Ability to validate AI-generated code for correctness, security, maintainability, test coverage, and fit with the surrounding architecture before it is accepted.
• Track record of independently driving ambiguous work to a verified outcome.

Requirements

• Strong problem-solving and debugging skills.
• Clear written and verbal communication in a remote, cross-functional environment.
• Ability to work independently and take ownership of projects.
• Strong communication skills with the ability to articulate, diagram, and document complex engineering concepts.

Benefits

• Join a powerful tech workforce and help us change the world through technology.
• Professional development opportunities with international customers.
• Collaborative work environment.
• Career path and mentorship programs that will lead to new levels.