Senior Software Engineer (Back-end)

Harnham Ltd; Tempe (AZ); On-site; USD 120,000 - 140,000; Full time

Job summary

Harnham Ltd is seeking a Senior Backend Engineer in Tempe, AZ to design, develop, and deliver scalable cloud-based applications and services. The role emphasizes backend work while contributing to frontend tasks as needed, collaborating with architects, engineers, and stakeholders to build high-performance APIs and platforms.

Responsibilities include building RESTful services, cloud-native microservices on AWS, CI/CD, Docker containers, and ensuring enterprise-aligned architecture.

Job description

Overview

A growing enterprise technology organisation is seeking a Senior Backend Engineer to design, develop, and deliver scalable cloud-based applications and services. This role focuses primarily on backend development while contributing to frontend initiatives as needed. The successful candidate will work in a fast-paced environment, partnering with architects, engineers, and business stakeholders to build high-performance digital platforms, APIs, and customer-facing applications.

Senior Software Engineer (Backend)

$120,000-$140,000

Key Responsibilities

• Design, build, and maintain scalable backend services and distributed applications.
• Develop cloud-native microservices leveraging AWS technologies and modern development frameworks.
• Create and support RESTful APIs and system integrations.
• Contribute to technical architecture discussions and solution design initiatives.
• Evaluate emerging technologies and recommend improvements to the technology stack.
• Build proof-of-concept solutions to validate architecture and engineering approaches.
• Refactor and modernise existing applications to improve scalability, performance, and maintainability.
• Collaborate with engineering teams to create reusable components and shared services.
• Promote standardisation and reduce duplicate technical efforts across projects.
• Participate in Agile development activities, including planning, estimation, and delivery.
• Partner with architects, engineering leadership, and stakeholders to align solutions with enterprise standards.
• Support testing, deployment, and release management processes.
• Coordinate user acceptance testing activities and gather feedback from stakeholders.
• Track defects, enhancements, and feature requests using issue management tools.
• Identify, communicate, and mitigate project risks and technical challenges.
• Prepare and review technical documentation, architecture artefacts, and solution designs.

Required Qualifications

• Bachelor's degree in Computer Science, Information Technology, Engineering, or a related discipline.
• 6 to 8 years of experience developing large-scale web, mobile, or API-driven applications.
• Strong experience designing scalable, high-performance microservices and backend systems.
• Expertise with:
  • Node.js
  • TypeScript
  • AWS cloud services
  • AWS serverless technologies
  • MongoDB
  • REST APIs
  • SQL and NoSQL databases
• Experience designing and implementing system integrations.
• Solid understanding of cloud architecture and distributed systems.
• Experience working within Agile software development environments.
• Hands-on experience with CI/CD pipelines and related tooling, including source control, automated builds, containerisation, and deployment automation.
• Familiarity with Docker, containers, and modern DevOps practices.
• Strong analytical and problem-solving abilities.
• Excellent verbal and written communication skills.
• Ability to collaborate effectively with technical and non-technical stakeholders.
• Adaptability and ability to manage changing priorities in a fast-paced environment.

Preferred Qualifications

• Experience with:
  • React
  • React Native
  • GraphQL
  • CRM platform integrations
• Experience supporting mobile application ecosystems.
• Exposure to enterprise-scale architecture and modernisation initiatives.

Work Model / Location / Engagement Details

• Full-time Senior Software Engineering position.
• Collaborative environment with cross-functional teams.
• Opportunity to work on cloud-native platforms, customer-facing applications, and enterprise-scale services.
• Competitive compensation package and performance-based incentives.
• Comprehensive benefits programme, retirement savings options, paid time off, recognised holidays, and professional development opportunities.