Senior Backend Engineer — Remote Contractor (EU Overlap)

Hauler Hero Inc.; United States; Remote; USD 165,000 - 276,000; Full time

Job summary

Hauler Hero Inc. is seeking a Senior Backend Engineer (Contractor) to design, build, and evolve the core backend services powering our platform.

The role is 100% hands-on and focused on scalable, reliable systems used by North American waste haulers, with AI-assisted tooling involved in daily development. You will work across Product, Frontend, and Platform Engineering to ship features, improve robustness, and refactor existing services as the platform scales, while maintaining clear

Qualifications

• 5+ years of experience building production backend systems.
• Experience designing and operating distributed data systems at scale.
• Experience working in Agile or Scrum environments.
• Strong Git and GitHub workflows.

Responsibilities

• Design, build, and maintain robust backend services using Java/Kotlin and Spring Boot.
• Develop scalable APIs and optimize data access for performance and reliability.
• Collaborate with Product, Frontend, and Platform teams in an Agile environment.
• Refactor and evolve services for maintainability and scale.
• Mentor engineers through code reviews and technical discussions.

Skills

Backend development

Java

Kotlin

Spring Boot

APIs

SQL

PostgreSQL

Distributed systems

Git / GitHub

English communication

Tools

Git

GitHub Actions

Claude / AI tools

SQL tooling

Job description

Hauler Hero Inc. is seeking a Senior Backend Engineer (Contractor) to design, build, and evolve the core backend services powering our platform.

The role is 100% hands-on and focused on scalable, reliable systems used by North American waste haulers, with AI-assisted tooling involved in daily development. You will work across Product, Frontend, and Platform Engineering to ship features, improve robustness, and refactor existing services as the platform scales, while maintaining clear