Senior Full-Stack Engineer: AI-Driven SaaS Builder

Key People; Columbus (OH); On-site; USD 120,000 - 160,000; Full time

Job summary

Key People is seeking a Senior Software Engineer who loves building products from scratch and has a real voice in design decisions. You will work on full-stack SaaS using Rails, React/TS, and PostgreSQL, and shape architecture and APIs.

You will mentor engineers, drive production quality, and leverage AI-assisted development tools to boost productivity while collaborating with leadership to evolve engineering practices.

Qualifications

• 5+ years of professional software engineering experience.
• Strong hands-on experience with Ruby on Rails, React/TypeScript, and PostgreSQL.
• Working knowledge of AWS and cloud-based application development.
• Experience owning software features from design through production.
• Experience with automated testing, CI/CD, and modern software engineering practices.
• Practical experience using AI coding tools such as Claude Code, GitHub Copilot, Codex, or similar technologies.
• Strong problem-solving skills, sound technical judgment, and the ability to work independently while collaborating with a team.

Responsibilities

• Build and own new product features from initial design and development through testing, deployment, and ongoing enhancements.
• Develop full-stack SaaS applications using Ruby on Rails, React/TypeScript, and PostgreSQL.
• Help shape technical design decisions, application architecture, APIs, and database structures.
• Leverage AI-assisted development tools to accelerate coding, testing, debugging, and overall engineering productivity.
• Collaborate with a Principal Engineer to help establish and evolve modern, AI-driven engineering practices.
• Mentor other engineers through code reviews, technical guidance, and knowledge sharing.
• Take ownership of production performance, quality, scalability, and continuous improvement.

Skills

Ruby on Rails

React/TypeScript

PostgreSQL

AWS

CI/CD

AI coding tools

Tools

Claude Code

GitHub Copilot

Codex

Job description

Key People is seeking a Senior Software Engineer who loves building products from scratch and has a real voice in design decisions. You will work on full-stack SaaS using Rails, React/TS, and PostgreSQL, and shape architecture and APIs.

You will mentor engineers, drive production quality, and leverage AI-assisted development tools to boost productivity while collaborating with leadership to evolve engineering practices.