Senior Software Engineer- Full Stack

Crexi is building a digital marketplace for the commercial real estate industry, using technology and AI to modernize how deals are found, evaluated, and closed. The Senior Software Engineer, Full Stack will design, build, test, and ship end-to-end platform features across user interfaces, APIs, and data while collaborating with Product and Design. The role also involves improving system quality, security, performance, developer processes, and mentoring junior engineers.

Responsibilities:

• Design, develop, deploy, and maintain full-stack web applications using TypeScript across front-end and back-end systems
• Build high-quality, customer-facing user interfaces with modern web frameworks (Angular preferred)
• Translate designs into responsive, modern experiences across devices (desktop, tablet, mobile)
• Build and maintain backend services and APIs (Node.js/TypeScript), including: Scalable API design (REST and/or GraphQL) Authentication/authorization patterns Data modeling and database schema design Performance, reliability, and concurrency considerations
• Rapidly prototype, iterate, and ship user-facing features—balancing speed with long-term architectural integrity
• Leverage AI coding tools (e.g., Cursor, Copilot) for scaffolding, refactoring, test generation, and debugging—while critically reviewing AI output for correctness, security, and performance
• Participate in (and often lead) code reviews, raising the bar on quality, readability, and security across the stack
• Troubleshoot complex production issues with a focus on observability, performance tuning, and prevention
• Identify opportunities to improve developer/agentic experience, processes, and platform foundations (tooling, CI/CD, testing, architecture patterns)
• Collaborate cross-functionally with Product, Design, and Engineering to drive measurable impact for customers
• Mentor junior engineers through pairing, feedback, and technical guidance; contribute to a culture of pragmatic, user-focused engineering
• Author and maintain clear technical documentation for features, APIs, and system behavior

Requirements:

• Bachelor's degree in Computer Science or related field, or equivalent practical experience
• 5+ years of professional software development experience in production environments with meaningful scope/ownership
• 2+ years of hands-on TypeScript experience across front-end and back-end contexts
• Proven full-stack capability: you have shipped features end-to-end (UI → API → data) and can own production outcomes
• Strong experience building modern web UIs using TypeScript
• Strong backend fundamentals, including API design, data modeling, and performance considerations
• Experience with source control and collaborative workflows (GitHub/GitLab), including code reviews and CI/CD basics
• Demonstrated use of AI coding assistants (e.g., Copilot, Cursor) in a professional workflow—without compromising quality
• Self-starter who independently drives outcomes, owns success metrics, and follows through
• Strong product thinking: you can balance customer experience, technical feasibility, and maintainability
• Excellent communication skills—able to explain tradeoffs and align stakeholders
• Strong debugging skills across the stack (UI, APIs, data), with a calm, structured approach to incident response
• Security- and privacy-minded engineering approach (safe defaults, least privilege, secure coding practices)
• Angular
• deeper expertise
• startup / zero-to-one experience