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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 Developer DevOps Frontend Full Stack JavaScript Mobile Development Senior Developer Software Development Software Engineer Software Engineering SQL
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Job Description

Oculus Systems Security is seeking a Senior Full Stack Software Engineer (Mobile + Web) for a SaaS Field Operations Platform. This onsite role in Lakewood, CO blends support for a legacy PHP/Laravel stack and native iOS/Android apps with building a next-generation Python/Django and React/React Native platform. The position emphasizes real ownership, a focused two-person engineering approach, and a culture that values reliability and compliance. On-the-job training, paid sick time, and paid time off are provided as part of the benefits package.

Responsibilities

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

Requirements

  • Mobile app development experience is required — native iOS/Android or React Native, ideally exposure to both. Comfortable with 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 + Python/Django modern) without requiring greenfield projects to do good work.
  • Experience with multi-tenant SaaS architecture is a strong plus (schema-based tenancy, tenant isolation patterns).
  • AWS familiarity: EC2, RDS/Aurora, ALB, CI/CD pipelines (CodePipeline/CodeBuild or equivalents like GitHub Actions/CircleCI).
  • Experience with payment/subscription systems (Authorize.net, Stripe, or similar) is a plus given the ARB-based legacy billing.
  • Strong independent judgment and the ability to work autonomously on production systems with legal/compliance weight.

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?

Direct ownership is a core aspect of this role. You will be one of two engineers shaping architecture and delivering meaningful impact, not one of many contributors. You will experience a full legacy-to-modern platform migration from the inside, influencing decisions as the platform evolves while the old system remains live.

Pay

USD 60,000.00 - 140,000.00 per year

Location

Lakewood, CO (onsite)

Nice to have

  • Experience with field-service, workforce-management, or security-industry software
  • Familiarity with geofencing/location-based features
  • Experience migrating a legacy system to a new platform while keeping the old one live
  • Comfort with Jira-based sprint workflows (1-week sprints, story-pointed backlog)

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