Senior Backend Engineer (Contractor)
New
H
Hauler HeroB2B SaaS Logistics
Eastern Europe, Must consistently overlap with U.S. working hoursContractSenior
Salary not disclosed
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Job Details
- Languages
- English
- Experience
- 5+ years
- Required Skills
- PostgreSQLSQLGitJavaKotlinSpring BootMicroservicesGitHub
Requirements
- 5+ years of experience building production backend systems.
- Strong proficiency with Spring Boot using Java and/or Kotlin.
- Deep experience with relational databases, especially PostgreSQL.
- Experience building and maintaining production APIs.
- Experience refactoring toward or within microservice architectures.
- Experience designing and operating systems with distributed data and scale.
- Experience working in Agile or Scrum environments.
- Strong experience with Git and GitHub workflows.
- Ability to translate product requirements into technical solutions.
- Strong problem-decomposition and debugging skills.
- Clear written and verbal English communication skills.
- Must be comfortable using AI development tools such as Claude, Cursor, and GitHub Copilot.
Responsibilities
- Design, build, and maintain robust backend service layers.
- Write clean, testable, high-performance code in Java and/or Kotlin using Spring Boot.
- Design and implement APIs that scale with real production workloads.
- Design and optimize relational schemas in PostgreSQL and tune SQL queries.
- Collaborate with Frontend and Product teams on feature development and resolve production issues.
- Participate in design reviews, code reviews, and architectural discussions.
- Mentor engineers through code reviews and technical discussions.
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