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Oculus Systems Security

Senior Full Stack Software Engineer (Mobile + Web) — SaaS Field Operations Platform

Oculus Systems Security
Lakewood, CO $60k - $140k/yr Full time Posted 6d ago
Backend Developer Senior APIs Cloud Operations Data Processing Database Databases DevOps Engineer Frontend Full Stack JavaScript Mobile Development Senior Developer Software Development Software Engineer Software Engineering SQL
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Job Description

This senior role focuses on a SaaS field operations platform, balancing ongoing maintenance of a legacy PHP/Laravel stack and native mobile apps with the development of a next-generation Python/Django and React/React Native platform. The position is based onsite in Lakewood, Colorado, with a salary range of USD 60,000 to 140,000 per year.

Responsibilities

  • Legacy platform (current production): a Laravel 5.8 / PHP 7.4 monorepo supporting multiple web applications (customer-facing permit portal, parking operations, HQ, admin/backend), a Laravel REST API, and native iOS/Android apps
  • Infrastructure and deployments: PostgreSQL on AWS RDS, EC2 instances behind an Application Load Balancer, CodePipeline and CodeBuild deployments
  • Billing and communications: payment/subscription processing via Authorize.net ARB and transactional email via Postmark
  • Operational reliability: bug fixes, incident response, targeted remediation, and controlled feature changes to maintain reliability and compliance while the legacy system is phased out
  • Next-gen platform (active build): multi-tenant SaaS ERP for managing distributed field/security personnel, clients, and client properties
  • Backend architecture: Django 5.0 with Django REST Framework, django-tenants for schema-based multi-tenancy, Celery for background and scheduled jobs
  • Frontend and mobile: React for web, React Native for iOS and Android; field-worker interface includes shift check-ins, offline data synchronization, geofencing, and EXIF/compression handling for photos
  • Data and infrastructure: PostgreSQL (Aurora) and Redis (ElastiCache) for caching and queues; AWS components including VPC, ALB, EC2, CodePipeline/CodeBuild/CodeDeploy; JWT-based authentication; service-layer architecture with clear separation between views, serializers, and business logic

Requirements

  • Mobile app development experience is required, either native iOS/Android or React Native, with comfort across offline-first patterns, background sync, geolocation, and device permissions (camera, GPS)
  • Full-stack capabilities including backend API design (REST), relational database design (PostgreSQL preferred), and frontend web development (React)
  • Ability to work across two tech stacks simultaneously (PHP/Laravel legacy and Python/Django modern) without requiring everything to be greenfield
  • Experience with multi-tenant SaaS architecture is a strong plus (schema-based tenancy, tenant isolation patterns)
  • AWS familiarity: EC2, RDS/Aurora, ALB, and CI/CD pipelines (CodePipeline/CodeBuild or equivalents like GitHub Actions or CircleCI)
  • Experience with payment/subscription systems (Authorize.net, Stripe, or similar) is a plus due to the legacy ARB-based billing
  • Strong independent judgment; capable of handling production systems with legal and compliance considerations in a lone-wolf engineering environment

Technologies

  • Laravel, PHP, iOS, Android, PostgreSQL, AWS, CodePipeline, CodeBuild, CodeDeploy, Authorize.net, Postmark
  • Django, Django REST Framework, django-tenants, Celery
  • React, React Native, Aurora (PostgreSQL), Redis, ElastiCache
  • JWT, VPC, ALB, EC2, Stripe, GitHub Actions, CircleCI
  • REST API, Python

Benefits

  • On-the-job training
  • Paid sick time
  • Paid time off

Why This Role

The position offers direct ownership within a small engineering team, with significant architectural influence and the opportunity to shape a major platform migration from legacy to modern systems. You will be closely involved in both maintaining the current production stack and steering the development of the next-generation platform from inside the project.

Pay

USD 60,000.00 – 140,000.00 per year

Work Location

Onsite in Lakewood, Colorado

Nice To Have

  • Experience with field-service, workforce-management, or security industry software
  • Familiarity with geofencing or location-based features
  • Experience migrating a legacy system to a new platform while keeping the old system live
  • Comfort with Jira-based sprint workflows (one-week sprints, story-pointed backlog)

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