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Junior Developer Startup Jobs in Colorado (NOW HIRING)

Lunar Outpost, Inc.

Senior Core Software Engineer

Arvada, CO · On-site

$105K - $145K/yr

... startup environment. The main responsibility of the Senior Core Software Engineer is to act as a ... Experience mentoring junior engineers and task planning Lunar Outpost Inc. is an equal opportunity ...

Ursa Major

Senior Flight Test Engineer

Berthoud, CO

$121K - $150K/yr

... junior engineers and leading project teams. As a Senior Flight Test Engineer, you'll serve as the ... Comfortable working in a fast-paced, startup environment, adapting to evolving priorities * Willing ...

Worley

Principal Project Engineer

Denver, CO · On-site

$167K - $210K/yr

Support construction, commissioning, and startup activities, including troubleshooting flow-related issues. * Act as a technical mentor to junior engineers and provide guidance on best practices and ...

UseBlocky

Senior Blockchain Engineer

Almont, CO · On-site +1

$157K - $178K/yr

Conduct code reviews and mentor junior engineers. * Stay current with emerging blockchain ... Previous experience working in a startup or fast-paced product environment. What We Offer

CesiumAstro

Senior Electronics Engineer II

Westminster, CO · On-site

$108K - $133K/yr

If you enjoy working in a startup environment and are passionate about developing leading-edge ... Mentor junior and senior engineers to build technical understanding and professional development.

Lunar Outpost

Senior Software Engineer - Perception

Arvada, CO · On-site

$125K - $165K/yr

... startup environment. Take the #NextLeap with Lunar Outpost and work on the Pegasus LTV, which will ... Mentor junior engineers and promote a culture of technical excellence and innovation Required ...

CesiumAstro

Senior Electronics Engineer II

Westminster, CO · On-site

$108K - $133K/yr

If you enjoy working in a startup environment and are passionate about developing leading-edge ... Mentor junior and senior engineers to build technical understanding and professional development.

Infleqtion

Sr Software Engineer

Boulder, CO · On-site

$106K - $145K/yr

At Infleqtion we embrace a startup mentality driven by results, urgency, and customer-focused ... Mentor and guide junior engineers, fostering their growth and enhancing the team's technical ...

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Junior Developer Startup information

See Colorado salary details

$25.2K

$93.6K

$144.6K

How much do junior developer startup jobs pay per year?

As of Jul 18, 2026, the average yearly pay for junior developer startup in Colorado is $93,559.00, according to ZipRecruiter salary data. Most workers in this role earn between $70,500.00 and $91,500.00 per year, depending on experience, location, and employer.

What is a Junior Developer Startup job?

A Junior Developer Startup job involves working as an entry-level software developer in a fast-paced startup environment. You'll likely assist in coding, debugging, and testing software while collaborating with a small team. Startups often require developers to be adaptable, learn quickly, and take on various responsibilities beyond coding. This role provides great exposure to modern technologies and agile development practices. It’s a valuable opportunity to grow your skills and gain hands-on experience in a dynamic setting.

What are the key skills and qualifications needed to thrive in the Junior Developer Startup position, and why are they important?

To thrive as a Junior Developer at a startup, you need foundational knowledge of programming languages (such as JavaScript, Python, or Ruby), basic understanding of web development, and a degree in computer science or related experience. Familiarity with source control systems like Git, cloud services, and popular frameworks is important, and participation in coding bootcamps or relevant certifications is a plus. Strong problem-solving, adaptability, and effective communication are key soft skills for collaborating in a dynamic, fast-paced environment. These abilities help junior developers quickly learn, contribute to product development, and grow within the rapidly evolving startup landscape.

What are some common challenges a Junior Developer may face when working at a startup?

Junior Developers in startup environments often encounter rapid changes in project direction, shifting priorities, and the need to learn new technologies quickly. Unlike more established companies, startups may have less formalized onboarding and training, requiring you to take initiative and learn on the go. You'll likely collaborate closely with small, cross-functional teams, which means communication skills and flexibility are essential. Embracing these challenges can accelerate your growth, expand your technical skill set, and offer opportunities to make a direct, visible impact on the company's products.

What are the most commonly searched types of Developer Startup jobs in Colorado? The most popular types of Developer Startup jobs in Colorado are:
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Junior Developer Startup jobs near you
Senior Core Software Engineer

Senior Core Software Engineer

Lunar Outpost, Inc.

Arvada, CO • On-site

$105K - $145K/yr

Full-time

Posted 11 days ago

Job description

Are you passionate about shaping the future of humanity's presence in space? Lunar Outpost, an industry leader in space robotics and planetary vehicles, invites you to join our team! Lunar Outpost is dedicated to creating a permanent presence in space, while also driving positive impacts here on Earth. We are currently seeking a Senior Core Software Engineer to contribute to our mission in a dynamic startup environment. The main responsibility of the Senior Core Software Engineer is to act as a subject matter expert in NASA core flight system (cFS) services and application development for mission-critical space robotics. They will lead cFS development efforts and mentor engineers on cFS best practices, ensuring the system meets stringent real-time, safety, and reliability requirements for crewed and autonomous space operations.
Take the #NextLeap with Lunar Outpost and work on the Pegasus LTV, which will carry NASA astronauts farther than they've ever been before on the lunar surface!
Key Responsibilities:
  • Design, develop, and maintain embedded and flight software for real-time systems
  • Implement software on RTOS-based platforms (e.g., VxWorks, RTEMS, or similar)
  • Support development of flight software applications, including command/telemetry handling and system control logic
  • Develop and integrate device drivers and hardware abstraction layers
  • Collaborate with hardware and systems engineers to integrate software with embedded platforms
  • Assist with system integration, testing, and validation, including simulation and hardware-in-the-loop environments
  • Debug and troubleshoot issues related to performance, timing, and system interaction
  • Contribute to documentation, including design descriptions and test procedures

Required Qualifications:
  • Bachelor's degree in computer or electrical engineering or related field
  • 3+ years in embedded software or avionics systems for space or mission-critical robotics applications
  • Experience with RTOS-based systems (e.g., VxWorks, FreeRTOS, RTEMS, or similar)
  • Understanding of real-time systems concepts (task scheduling, interrupts, memory constraints)
  • Experience with
    software integration and testing on hardware platforms
  • Proficiency in C for embedded systems
  • Experience with flight software frameworks such as NASA cFS or similar architectures
  • Familiarity with spacecraft data handling, telemetry/command processing, and
    networking
  • Experience with robotics platforms for planetary exploration, surface mobility, or space station operations
  • Self-motivated, focused, and driven to meet critical deadlines
  • Excellent organization and time management skills
  • Excellent written and oral communication skills
  • U.S. Person

Preferred Qualifications:
  • Experience with device driver development or board support packages (BSPs)
  • Experience working with simulation tools or hardware-in-the-loop testing
  • Knowledge of fault-tolerant or safety-critical software design principles
  • Experience with GNC software integration in robotic or spacecraft systems
  • Prior work with crewed vehicle avionics architecture or planetary robotics
  • Experience mentoring junior engineers and task planning

Lunar Outpost Inc. is an equal opportunity employer. Lunar Outpost Inc. does not discriminate on the basis of race, color, religion, sex (including pregnancy, sexual orientation, and gender identity), national origin, ethnicity, age, disability, veteran status, genetic information, or any other characteristic protected by applicable law. All employees, including executives and human resources personnel, are expected to conduct themselves with professionalism and treat others with dignity and respect in accordance with this policy.

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