Hauler Hero

Senior Backend Engineer – Contractor

Hauler Hero

contract

Posted on:

Location Type: Remote

Location: Anywhere in Latin America

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Job Level

Senior

Tech Stack

JavaJavaScriptKotlinNode.jsPostgresReactSpringSpring BootSpringBootSQL

About the role

  • 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
  • Refactor and extend existing services to improve reliability and maintainability
  • Create reusable components and patterns that improve team velocity
  • Design and optimize relational schemas in PostgreSQL
  • Write and tune performant SQL queries for large data volumes
  • Validate that database access patterns scale under load
  • Identify and resolve performance bottlenecks across services
  • Work as part of a cross-functional Agile/Scrum team
  • Participate in design reviews, code reviews, and architectural discussions
  • Collaborate with frontend and product teams on feature development
  • Debug and resolve production issues as they arise
  • Contribute to improving engineering processes and practices
  • Mentor engineers through code reviews and technical discussions

Requirements

  • 5+ years building production backend systems
  • Experience designing and operating systems with distributed data and meaningful scale
  • Experience working in Agile/Scrum environments
  • Strong Git/GitHub workflow experience
  • Strong proficiency with Spring Boot (Java and/or Kotlin)
  • Deep experience with relational databases, especially PostgreSQL
  • Experience building and maintaining production APIs
  • Experience refactoring toward or within microservice architectures
  • Ability to translate product requirements into technical solutions
  • Strong problem-decomposition and debugging skills
  • Solid computer science fundamentals and engineering judgment
  • Clear written and verbal communication skills
  • Experience with Node.js or React (Nice to Have)
Benefits
  • Must overlap with US working hours
  • Contractor role, not full-time employment
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
JavaKotlinSpring BootPostgreSQLSQLAPIsmicroservice architectureGitGitHubNode.js
Soft Skills
problem decompositiondebuggingcommunicationmentoringcollaborationengineering judgmentdesign reviewcode reviewtechnical discussionsAgile/Scrum