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Freelance Java Backend Developer Jobs in Colorado

Cymertek

Java / Spring Developer

Aurora, CO · On-site

$52 - $67.25/hr

SIMILAR CAREER TITLESJava Developer, Spring Boot Developer, Backend Developer, Full Stack Java Developer, Software Engineer, Java Microservices Developer, Web Application Developer, API Developer ...

Cymertek

Java, Scala, Python Developer

Aurora, CO · On-site

Java, Scala, Python Developer LOCATIONAurora, CO 80014 CLEARANCETS/SCI Full Poly (Please note this ... Build APIs and backend services to support applications * Optimize code for performance and ...

Cymertek

Java / Spring Developer

Aurora, CO · On-site

$52 - $67.25/hr

SIMILAR CAREER TITLES Java Developer, Spring Boot Developer, Backend Developer, Full Stack Java Developer, Software Engineer, Java Microservices Developer, Web Application Developer, API Developer ...

Wise Skulls

Senior Backend Engineer

Denver, CO · On-site

Senior Backend Engineer (Java/Scala or TypeScript/Node.js) About the Role We're looking for a senior engineer who doesn't just write code - they own outcomes. You'll be responsible for the full ...

innovitusa

Java Developer

Denver, CO

$52.50 - $68/hr

Build RESTful APIs and backend systems * Work with Spring Boot and microservices architecture * Perform code reviews and debugging * Collaborate with QA and DevOps teams Required Skills * Strong Java ...

New

CosQube INC

Scala Developer

Denver, CO · On-site

Design and develop RESTful and GraphQL APIs using Java and Scala * Build event-driven services and ... Implement backend systems using frameworks like Spring Boot, Akka HTTP, or Play * Ensure reliable ...

AdCellerant

Senior Backend Engineer

Denver, CO · On-site +1

$135K - $165K/yr

Our ecosystem relies on both Node.js and Java. We need a versatile engineer who can confidently ... Architect, build, and maintain robust backend services across both Node.js and Java environments.

Leidos

Backend Software Engineer

Aurora, CO

$107.90K - $195.05K/yr

If you've spent the last few years building your expertise in backend engineering, Java or Python development, and missiondriven systems , and you're ready for work that actually moves the needle ...

Pentera

Senior Backend Engineer

Denver, CO · On-site

$180K - $210K/yr

At Pentera, backend engineers build and operate production-grade systems that sit at the core of ... Strong proficiency in Java or Python * Proven experience designing and operating backend systems ...

Artech Information System LLC

Java Developer

Denver, CO

$52.50 - $68/hr

Backend Java Developer * Spring * NoSQL/MySQL * Cassandar (plus) * Candidates with the soft skills (passionate, pro-active, personable) Additional Information Prashant Sharma, Recruitment Specialist ...

Cymertek

Java Software Engineer

Aurora, CO

$52.75 - $72.25/hr

SIMILAR CAREER TITLESJava Developer, Backend Developer, Full Stack Developer, Software Engineer, Application Developer, Java Application Developer, Web Developer, Enterprise Software Engineer ...

Cymertek

Java Software Engineer

Aurora, CO · On-site

$52.75 - $72.25/hr

SIMILAR CAREER TITLES Java Developer, Backend Developer, Full Stack Developer, Software Engineer, Application Developer, Java Application Developer, Web Developer, Enterprise Software Engineer ...

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Back-End Software Developer - Mid-level

LMI Government Consulting (Logistics Management In

Colorado Springs, CO • Remote

$101K - $174K/yr

Other

Posted 29 days ago

Job description

Overview
LMI is actively seeking a dynamic, experienced Mid-level Back-End Software Developer to join LMI's Space Market software development team in Colorado Springs, CO. This role involves working directly with USSF and US Government customers, as well as analytical partners, to drive the development of responsive, high-performance user interfaces within LMI's Modeling, Simulation, Prototyping, Wargaming, & Analysis platform, RAPTR .
LMI is a new breed of digital solutions provider dedicated to accelerating government impact with innovation and speed. Investing in technology and prototypes ahead of need, LMI brings commercial-grade platforms and mission-ready AI to federal agencies at commercial speed.
Leveraging our mission-ready technology and solutions, proven expertise in federal deployment, and strategic relationships, we enhance outcomes for the government, efficiently and effectively. With a focus on agility and collaboration, LMI serves the defense, space, healthcare, and energy sectors-helping agencies navigate complexity and outpace change. Headquartered in Tysons, Virginia, LMI is committed to delivering impactful results that strengthen missions and drive lasting value.
Responsibilities
  • Develop and maintain server-side logic to power application functionality, handle user requests, and manage data.
  • Design and implement RESTful APIs for internal and external communication.
  • Create and optimize database schemas, write efficient queries, and ensure data integrity and security.
  • Participate in code reviews, debug developed code and stay current with software development trends.
  • Collaborate with front-end developers to integrate back-end functionality with user interfaces.
  • Implement security measures to protect sensitive data and prevent unauthorized access.
  • Contribute to the scalability and performance optimization of back-end systems.
  • Write and maintain technical documentation for back-end systems and APIs.
  • Collaborate with cross-functional teams to review and refine system architecture, interfaces, and data models in an agile environment.
  • Actively collaborate in cross-functional engineering working groups to review, assess, and mature software artifacts such as system architecture, system behavior, system interfaces and requirements, software test plans, UI/UX designs, functional allocation, Interface Control Documents/Descriptions (ICDs), and data models.

Qualifications
Required:
  • Bachelor's degree in Computer Science/Engineering, or equivalent STEM field with 3-8 years of experience (2-7 years with Master's degree) in back-end software development
  • Proficiency in either SQL (e.g., MySQL, PostgreSQL) or NoSQL (e.g., MongoDB) databases.
  • Experience with back-end technologies (Rust, Python, Java) within agile development frameworks
  • Familiarity with back-end frameworks like Django, Flask, Spring, or Express.js.
  • Experience with API development and integration and collaborating with front-end developers.
  • Familiarity with version control systems (e.g., Git).
  • Knowledge of software performance optimization.
  • Familiarity with testing frameworks for back-end applications.
  • Strong problem-solving skills.
  • Excellent communication and teamwork abilities.
  • ship required, eligible for TS clearance.

Desired:
  • Advanced degree in Computer Science or related field.
  • Knowledge of cybersecurity best practices.
  • Active TS clearance with SCI eligibility or prior experience working on government-related projects
  • Space domain experience and familiarity with space-focused software solutions.

Target salary range: $101,000- $174,000
Disclaimer: The salary range displayed represents the typical salary range for this position and is not a guarantee of compensation. Individual salaries are determined by various factors including, but not limited to location, internal equity, business considerations, client contract requirements, and candidate qualifications, such as education, experience, skills, and security clearances.
#LI-SH1
Applicants must meet eligibility requirements for a U.S. Government security clearance. For this position, LMI will only consider applicants with security clearances or applicants who are eligible for security clearances, due to the nature of the work.
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LMI is an Equal Opportunity Employer. LMI is committed to the fair treatment of all and to our policy of providing applicants and employees with equal employment opportunities. LMI recruits, hires, trains, and promotes people without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, pregnancy, disability, age, protected veteran status, citizenship status, genetic information, or any other characteristic protected by applicable federal, state, or local law. If you are a person with a disability needing assistance with the application process, please contact
Colorado Residents: In any materials you submit, you may redact or remove age-identifying information such as age, date of birth, or dates of school attendance or graduation. You will not be penalized for redacting or removing this information.
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