Senior Software Engineer

Staffing Science; Phoenix (AZ); On-site; USD 140,000 - 180,000; Full time

Job summary

Staffing Science is hiring multiple Senior Software Engineers (Full Stack) to join a high-impact product engineering team building modern, scalable software used at meaningful scale.

While this is a true full-stack role, we are open to engineers who lean Front-End (React/web-first) or Back-End (Ruby/Elixir preferred) — as long as they are comfortable contributing across the stack. This role requires in-person collaboration in Arizona with regular onsite work.

Qualifications

• Bachelor’s degree in Computer Science, Software Engineering, or related field (or equivalent experience).
• 4–6+ years of professional software engineering experience.
• Experience across both front-end and back-end systems.
• Strong experience with React (front-end), RESTful APIs, and backend tech (Ruby/Elixir preferred, Java acceptable).
• Experience with relational databases (MySQL or similar) and Git/CI/CD.

Responsibilities

• Design, build, and maintain scalable full-stack applications.
• Develop modern web apps using React (web-first).
• Build backend services using Ruby or Elixir (Java acceptable).
• Design and consume RESTful APIs.
• Refactor legacy systems for scalability and performance.
• Contribute to shared UI components and design systems.
• Collaborate with product managers, designers, and QA.
• Participate in architectural discussions and roadmap planning.
• Improve CI/CD pipelines and development workflows.
• Conduct code reviews and mentor junior engineers.
• Identify opportunities to modernize systems and adopt AI tooling.

Skills

React

RESTful APIs

Ruby

Elixir

Java

MySQL

Git

CI/CD

Software architecture

Communication

Education

Bachelor’s degree in Computer Science or related field

Job description

About the Role

We are hiring multiple Senior Software Engineers (Full Stack) to join a high-impact product engineering team building modern, scalable software used at meaningful scale.

While this is a true full-stack role, we are open to engineers who naturally lean Front-End (React/web-first) or Back-End (Ruby/Elixir preferred) — as long as they are comfortable contributing across the stack.

This is not a siloed environment. Engineers are expected to think holistically about architecture, performance, scalability, and user experience.

We are specifically seeking candidates located in Arizona who are open to regular in-person collaboration.

What You’ll Do

• Design, build, and maintain scalable full-stack applications.
• Develop modern web applications using React (web-first).
• Build and maintain backend services using Ruby or Elixir (strong preference); Java experience is acceptable.
• Design and consume RESTful APIs.
• Refactor legacy systems for scalability, performance, and maintainability.
• Contribute to shared UI components and design systems.
• Collaborate closely with product managers, designers, and QA.
• Participate in architectural discussions and technical roadmap planning.
• Improve CI/CD pipelines and development workflows.
• Conduct code reviews and mentor junior engineers.
• Proactively identify opportunities to modernize systems and improve engineering standards.
• Evaluate and leverage AI tooling to improve development efficiency and product capabilities.

Required Qualifications

• Bachelor’s degree in Computer Science, Software Engineering, or related field (or equivalent experience).
• 4–6+ years of professional software engineering experience.
• Experience working across both front-end and back-end systems.
• Strong experience with:
• React (required for front-end contributions)
• RESTful APIs
• Backend experience in one or more of:
• Ruby (preferred)
• Elixir (preferred)
• Java
• Experience with relational databases (MySQL or similar).
• Familiarity with Git and CI/CD pipelines.
• Strong understanding of modern software architecture principles.
• Excellent communication and collaboration skills.

Nice to Have

• React Native experience (plus, not required).
• Experience with event-driven systems.
• Experience optimizing performance at scale.
• Familiarity with Azure DevOps or similar cloud tooling.
• Agile experience (Jira, Confluence).
• Experience modernizing legacy systems.

What We’re Looking For

• Engineers who think beyond tickets and care about architecture.
• Ability to contribute across the stack even if you have a strength area.
• Strong ownership mindset.
• Comfort working in a collaborative, high-growth environment.
• Interest in building scalable systems that evolve over time.