Senior Software Engineer

Order.co is a guided B2B marketplace with a mission to simplify buying for businesses. The Senior Software Engineer will deliver complex features reliably and own subsystems while mentoring junior engineers and driving improvements in team practices.

Responsibilities:

• Design and implement complex features end-to-end; own subsystems and navigate existing codebases with architectural discernment, using AI tooling as an accelerant while applying your own judgment on correctness, security, and alignment with the system's direction
• Participate in design reviews; propose sound technical designs and identify scalability, performance, and reliability risks before they become incidents
• Scope and estimate accurately; deliver features from requirements through rollout and post-release monitoring; communicate risks early
• Mentor junior and mid-level engineers through code reviews and pairing; provide substantive feedback that raises the quality of code around you
• Drive improvements in team practices — testing patterns, observability, code organization — and push back on shortcuts that create long-term cost
• Explain technical decisions clearly to both technical and non-technical stakeholders; represent engineering in product discussions with a security lens

Requirements:

• Production-grade Ruby on Rails; PostgreSQL with confidence in data modeling and query performance
• Experience building integrations with external systems — REST/GraphQL APIs, webhooks, or third-party vendor connections
• Familiarity with AWS, CI/CD pipelines, and deployment fundamentals
• Familiarity with AI coding assistants (e.g., Claude, GitHub Copilot); you understand where they help and where they fail — hands-on use is a plus, critical evaluation instinct is required