Senior Full Stack Software Developer

Benefits

• 401(k)
• Bonus based on performance
• Competitive salary
• Health insurance
• Opportunity for advancement
• Paid time off
• Profit sharing

Senior Full-Stack Software Developer - Must be in Austin

About ApexOS360

ApexOS360 is building an enterprise-grade operating platform for construction companies — project management, financials, field operations, document control, and real-time reporting in one system. Think Procore-level capability, built by people with 27+ years actually running construction projects across Texas and Colorado.

The Role

Own the entire product development process from day one. Architect, design, code, test, and deploy a production-grade SaaS platform on an aggressive timeline. You'll work directly with leadership, have full autonomy on technical decisions, and full accountability for results. This is a ground-floor opportunity to be the technical backbone of a product built to scale.

What You'll Do

• Own the full development lifecycle: architecture, design, development, testing, deployment, and iteration
• Design and build multi-tenant SaaS architecture with isolated data across multiple organizations
• Build modular platform structure (project management, financials, document control, field ops, reporting) that scales independently
• Develop data-rich front-end interfaces (React, Vue, or equivalent) including dashboards, Gantt charts, cost code views, and real-time collaboration tools
• Build robust back-end systems (Node.js, Python, or similar) with RESTful/GraphQL APIs and automated business logic workflows
• Design relational database schemas (PostgreSQL/MySQL) for complex construction data: projects, budgets, cost codes, change orders, contracts, lien waivers, daily logs
• Implement role-based access control (RBAC) with multi-level permissions across user types
• Build document management with version control, cloud storage (AWS S3), full-text search, and large file handling (100+ MB)
• Set up cloud infrastructure (AWS/Azure/GCP): auto-scaling, load balancing, Docker/Kubernetes, CI/CD pipelines
• Build third-party integrations (QuickBooks, Sage, DocuSign, scheduling/ERP systems)
• Develop mobile functionality via React Native, Flutter, or PWA with offline capability

Requirements

• 5+ years professional software development experience
• Proven track record taking a product from concept to live production deployment
• Experience with multi-tenant SaaS or enterprise platform architecture
• Strong full-stack skills: modern front-end frameworks, server-side languages, relational databases
• Deep system design and architecture understanding
• Cloud platform experience (AWS/Azure/GCP) including DevOps, CI/CD, and containerization
• Strong security fundamentals: OAuth 2.0, JWT, RBAC implementation
• Experience with API development, third-party integrations, and data conflict resolution
• Ability to work independently and communicate clearly to non-technical leadership
• Bias toward action — ship and iterate over endless planning

Nice to Have

• Construction tech, project management platforms, or B2B SaaS experience
• Mobile development (React Native, Flutter)
• Startup or small-team environment background
• Accounting system integrations (QuickBooks, Sage)
• Real-time dashboards or BI features
• Knowledge of construction workflows and field operations

What We Offer

• Ground-floor role with direct product and company impact
• Direct access to leadership with no management layers
• Full technical autonomy and ownership
• Competitive compensation with potential equity/profit-sharing
• Fast-paced environment that values results over process

Skills

Access Control, Accounting Software, Amazon Simple Storage Service (S3), Amazon Web Services (AWS), Application Programming Interface (API), Architectural Design, Autoscaling, Budgeting, Business Intelligence, Business-to-Business (B2B), Change Requests/Orders, Cloud Computing, Cloud Storage, Communication Skills, Conflict Resolution, Construction, Construction Projects, Continuous Deployment/Delivery, Continuous Integration, Database Design, Database Technology, DevOps, Document Control, Document Management, ERP (Enterprise Resource Planning), Enterprise Architecture, Financial Operations, GCP (Good Clinical Practices), GraphQL, Health Insurance, Intuit Quickbooks, Leadership, Liens, Load Balancing, Microsoft Windows Azure, Mobile Applications Development, MySQL, Node.js, OAuth, Operations Control, PostgreSQL, Product Development, Product Lifecycle, Project/Program Management, Python Programming/Scripting Language, REST (Representational State Transfer), React Native, React.js, Relational Databases (RDBMS), Reporting Dashboards, Server Programming/Applications, Software Development, Software as a Service (SaaS), Source Code/Configuration Management (SCM), Startup, System Architecture, System Integration (SI), Technical Leadership, Test Plan/Schedule, Testing, User Interface/Experience (UI/UX), Vue.js

About the Company

Apex Multifamily Builders LLC