Top 774 Applications Developer Jobs in Denver, CO

Senior Full Stack Software Engineer (Mobile + Web) — SaaS Field Operations Platform
Oculus Systems Security —Lakewood, CO
- $60,000 - $140,000 a year
- Full-time
- System design
- In-person
- Senior level
- Paid training
- Paid time off
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4d
Staff / Sr Staff DevSecOps Engineer
SciTec —Boulder, CO
- $98,000 - $146,000 a year
- Computer Science
- Mid-level
- Analysis skills
- Profit sharing
- Paid parental leave
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Python Developer - full stack
CPI Card Group —Colorado
- Computer science
- Computer Science
- Bachelor of Science
- Health savings account
- Paid holidays
11d
Mid-Level Software Engineer
Leidos —Englewood, CO
- $87,100 - $157,450 a year
- Full-time
- Azure
- Computer Science
- Mid-level
10d
Software Engineer Sr
PNC Financial Services Group —Lakewood, CO
- $86,250 - $158,125 a year
- Full-time
- System design
- 3 years
- Bachelor's degree
- Wellness program
- Health savings account
12d
Azure/.Net Developer
Matlen Silver —Denver, CO
- $75 - $80 an hour
- Contract
- 5 years
- Office
- SQL
- Health insurance
- Dental insurance
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Software Developer
FortyAU —Denver, CO
- $70,000 - $150,000 a year
- Full-time
- Office
- Java
- US work authorization
Quick Apply
Unreal Engine Developer – Robotics & Simulation
AION Robotics Corporation —Arvada, CO
- $40 - $75 an hour
- Full-time
- Remote
- Mid-level
- C++
- Scripting
Junior Front-End Developer
Parsons —Westminster, CO
- $88,400 - $154,700 a year
- Computer science
- Computer Science
- Office
- Wellness program
- Paid holidays
6d
React Native Developer
JPLoft —Denver, CO
- Mid-level
- Office
- SQL
- Health insurance
Flutter Mobile App Developer
JPLoft —Denver, CO
- Mid-level
- Office
- APIs
- Health insurance
Full Stack Developer
JPLoft —Denver, CO
- Azure
- Software troubleshooting
- DevOps
- Health insurance
Applications Engineer III - Full Stack Developer
Arcfield —Louisville, CO
- $95,336.84 - $165,772.27 a year
- Full-time
- Remote
- Azure
- AWS
- Doctor of Philosophy
- Paid holidays
- Disability insurance
10d
2026 Early Career Software Engineer
Anduril Industries —Broomfield, CO
- $115,000 - $135,000 a year
- Email
- Computer Science
- Java
- Master's degree
Applications Developer II
Sierra Space —Louisville, CO
- $89,016 - $122,418 a year
- Full-time
- Microsoft Access
- Azure
- Mid-level
- Health insurance
- Dental insurance
4d
Junior Full Stack Engineer
Zero Homes —Denver, CO
- $90,000 - $145,000 a year
- Full-time
- Hybrid work
- Office
- Residential
- Math
- Health insurance
- Dental insurance
Quick Apply
MERN / MEAN Developer
JPLoft —Denver, CO
- Mid-level
- Office
- AWS
- Health insurance
Salesforce Developer
Pax8 Global —Denver, CO
- $92,362 - $131,947 a year
- Full-time
- Remote
- US work authorization
- Senior level
- AD&D insurance
- Disability insurance
Marketing Website Developer
Alchemer —Louisville, CO
- $90,000 - $110,000 a year
- JavaScript
- US work authorization
- Senior level
- Paid holidays
- Health insurance
13d
Front-End ASP.Net Developer
PIN Business Network —Greenwood Village, CO
- $70,000 - $105,000 a year
- Full-time
- Writing skills
- Mid-level
- 3 years
- Health insurance
- 401(k)
Quick Apply

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Applications Developer jobs near Denver, CO

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

Oculus Systems Security -
Lakewood, CO

Quick Apply

Job Details

Full-time
$60,000 - $140,000 a year
4 days ago

Benefits

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

Qualifications

Jira
Software engineering
Mobile product development
System design
System design for system development
Production systems
Django
Developing and maintaining backend systems
Web applications
Back-end integration
DevOps automation
RDS database
React Native

Full Job Description

Company Overview

Oculus Systems Security is a forward-thinking security provider dedicated to enhancing safety through innovative technology and proactive physical security measures. We serve communities by bridging the gap between physical security and cutting-edge solutions, working closely with local law enforcement and clients to create safer environments.

About the Role

We're a security/field-services SaaS company running a live, revenue-generating platform for 70+ weekly users while simultaneously building its ground-up successor. We need an engineer who can operate independently across the full stack — mobile, backend, frontend, and database — and who is equally comfortable maintaining a legacy production system and building greenfield architecture.

This is not a "pick a lane" role. You'll split time between:

Maintaining and stabilizing our legacy production platform (PHP/Laravel + native iOS/Android), which handles active billing, government/legal compliance obligations, and daily field operations.
Building our next-generation platform(Python/Django + React + React Native), which will eventually replace the legacy system entirely.

You'll work directly with the Chief Technology Officer (CTO), who currently operates as sole engineer/architect across both systems — this role is designed to reduce that single point of failure and take ownership of significant chunks of both codebases.

What You'll Work On

Legacy Platform (current production system)

Laravel 5.8 / PHP 7.4 monorepo: multiple web apps (customer-facing permit portal, parking operations, HQ, admin/backend), a Laravel REST API, and native iOS/Android mobile apps
PostgreSQL on AWS RDS, EC2 instances behind an Application Load Balancer, CodePipeline/CodeBuild deployments
Payment/subscription processing via Authorize.net ARB, transactional email via Postmark
Bug fixes, incident response, targeted remediation work, and controlled feature changes — this system must stay reliable and compliant while it's 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) — this is the platform's field-worker interface, covering things like 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 auth, service-layer architecture with clear separation between views/serializers/business logic

What We Need From You

Mobile app development experience is required — either native iOS/Android or React Native, ideally exposure to both. You should be comfortable with offline-first patterns, background sync, geolocation, and device permissions (camera, GPS).
True full-stack range: backend API design (REST), relational database design (PostgreSQL preferred), and frontend web development (React).
Comfort working across two different tech stacks simultaneously (PHP/Laravel legacy + Python/Django modern) without needing everything to be greenfield 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 equivalent like GitHub Actions/CircleCI).
Experience with payment/subscription systems (Authorize.net, Stripe, or similar) is a plus given the legacy system's ARB-based billing.
Strong independent judgment. This is a lone-wolf engineering environment — we need someone who asks sharp clarifying questions up front, doesn't need hand-holding once scoped, and can be trusted with production systems that have legal/compliance weight.

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)

Why This Role?

Direct ownership — you won't be one of fifty engineers touching a codebase; you'll be one of two, with real architectural influence
You'll see a full legacy-to-modern platform migration from the inside, not just inherit the aftermath

Pay: $60,000.00 - $140,000.00 per year

Benefits:

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

Work Location: In person

Quick Apply

Refine Your Search

Applications Developer jobs in Denver, CO

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

Staff / Sr Staff DevSecOps Engineer

Python Developer - full stack

Mid-Level Software Engineer

Software Engineer Sr

Azure/.Net Developer

Software Developer

Unreal Engine Developer – Robotics & Simulation

Junior Front-End Developer

React Native Developer

Flutter Mobile App Developer

Full Stack Developer

Applications Engineer III - Full Stack Developer

2026 Early Career Software Engineer

Applications Developer II

Junior Full Stack Engineer

MERN / MEAN Developer

Salesforce Developer

Marketing Website Developer

Front-End ASP.Net Developer

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