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Back End Developer Jobs in Colorado (NOW HIRING)

CosQube INC

Scala Developer

Denver, CO · On-site

Scala Developer Location: Denver, US Duration:12+ Months Contract with Extension Employment Type ... Implement backend systems using frameworks like Spring Boot, Akka HTTP, or Play * Ensure reliable ...

Leidos

Mid-Level Backend Software Engineer

Aurora, CO · On-site

$87K - $157K/yr

We're hiring a Backend Software Engineer to support a high‑visibility, data‑driven application used across the organization for analytics and reporting. You'll help build and maintain core ...

Leidos

Mid-Level Backend Software Engineer

Aurora, CO

$87K - $157K/yr

We're hiring a Backend Software Engineer to support a highvisibility, datadriven application used across the organization for analytics and reporting. You'll help build and maintain core backend ...

Leidos

Mid-Level Backend Software Engineer

Boulder, CO · On-site

$87K - $157K/yr

We're hiring a Backend Software Engineer to support a high‑visibility, data‑driven application used across the organization for analytics and reporting. You'll help build and maintain core ...

Leidos

Mid-Level Backend Software Engineer

Denver, CO · On-site

$87K - $157K/yr

We're hiring a Backend Software Engineer to support a high‑visibility, data‑driven application used across the organization for analytics and reporting. You'll help build and maintain core ...

In Tandem

Senior Backend Engineer, Java

Denver, CO · On-site +1

$120K - $140K/yr

Senior Backend Engineer, Java Department: Engineering Employment Type: Permanent - Full Time Location: Remote USA - In Tandem Compensation: $120,000 - $140,000 / year Description At In Tandem, we ...

Wanco, Inc.

Be Seen First

Back-End Software Developer (Full-Stack Lean)

Arvada, CO · On-site

$115K - $135K/yr

About the Role We're looking for a back-end developer with solid full-stack instincts to join a small, cross-functional team building Fleet Manager -- a real-time fleet and device management platform ...

United IT Solutions

Java Backend Engineer

Denver, CO · On-site

$52 - $67.50/hr

Java Backend Engineer Job Location: Denver, CO Required Skills: * Strong experience with Scala ... Strong experience working with DevOps engineers to build and deploy infrastructure with cloud ...

United IT

Java Backend Engineer

Denver, CO · On-site

$52 - $67.50/hr

Java Backend Engineer Job Location: Denver, CO Required Skills: * Strong experience with Scala ... Strong experience working with DevOps engineers to build and deploy infrastructure with cloud ...

Simple Energy

Back-End Engineer

Boulder, CO

Basic Position Requirements (Back-End Engineer) Big data/scaling experience Scala and/or Java experience a plus Understanding of worker/message queues NoSQL experience Everyone on the team should ...

DAT

Staff Backend Software Engineer

Denver, CO · On-site

Mentor other backend engineers and provide technical guidance to elevate the skill level of the ... Work closely with cross-functional teams, including product managers, DevOps, and front-end ...

DAT

Staff Backend Software Engineer

Denver, CO

Mentor other backend engineers and provide technical guidance to elevate the skill level of the ... Work closely with cross-functional teams, including product managers, DevOps, and front-end ...

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Back End Developer information

See Colorado salary details

$12

$60

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How much do back end developer jobs pay per hour?

As of Jul 3, 2026, the average hourly pay for back end developer in Colorado is $60.71, according to ZipRecruiter salary data. Most workers in this role earn between $49.81 and $71.78 per hour, depending on experience, location, and employer.

What is a Back End Developer?

A Back End Developer is a programmer who specializes in building and maintaining the server-side logic, databases, and application functionality that power websites and web applications. Unlike front end developers, who focus on the visual and interactive elements users see, back end developers work behind the scenes to ensure data is stored, processed, and delivered correctly. They typically use programming languages like Python, Java, Ruby, or PHP, and interact with databases such as MySQL or MongoDB. Their work is crucial for making sure applications run smoothly, securely, and efficiently.

What are some common challenges Back End Developers face when integrating with front-end teams?

Back End Developers often encounter challenges when aligning data structures and APIs with front-end requirements, especially as user interface needs evolve rapidly during development. Effective communication and regular collaboration with front-end developers are essential to ensure that endpoints, data formats, and error handling are well-coordinated. Additionally, maintaining consistent documentation and using tools like Swagger or Postman can help streamline integration and reduce misunderstandings between teams.

Will backend be replaced by AI?

Back End Developers design and maintain server-side systems, and while AI can automate certain tasks like code generation and data processing, it is unlikely to fully replace the need for human developers. Skills in programming languages, database management, and understanding system architecture remain essential for backend roles as AI tools are used to augment, not replace, developer work.

What does a backend developer do?

A backend developer builds and maintains the server-side components of web applications, including databases, server logic, and APIs. They work with programming languages like Java, Python, or Ruby and often use tools such as version control systems and frameworks to ensure the application's functionality, security, and performance.

What engineer makes $500,000 a year?

A highly experienced back end developer working in specialized industries such as finance, technology, or consulting, especially in senior or executive roles, can earn $500,000 or more annually. These roles often require advanced skills in programming, system architecture, and experience with cloud platforms, along with leadership responsibilities and sometimes stock options or bonuses.

What Is a Back End Developer?

A back end developer is a computer science professional who specializes in functionality that takes place on the server side or backend. As a back end developer, you write code to create software that solves a business need. Your responsibilities are to research the needs of either your employer, or a particular industry, find a problem, and create a software solution. A back end developer differs from a traditional web developer, or front end developer, in that back-end software may not have a user interface or even have exposure to the web.

Is back-end developer in demand?

Back-end developers are in high demand due to the growth of web applications and digital services. Skills in programming languages like Java, Python, and frameworks such as Node.js are especially sought after, and experience with cloud platforms and databases can enhance job prospects.

What is the difference between Back End Developer vs Front End Developer?

AspectBack End DeveloperFront End Developer
Primary FocusServer-side logic, databases, APIsUser interface, website layout, client-side scripting
Skills & TechnologiesLanguages like Java, Python, Ruby; databases; server managementHTML, CSS, JavaScript, frameworks like React or Angular
Work EnvironmentBackend systems, server environments, cloud platformsDesign tools, browser testing, UI/UX design
Common CertificationsCertified Web Developer, AWS Certified DeveloperCertified Front End Developer, UI/UX certifications

Back End Developers focus on server-side logic, databases, and APIs, ensuring the website's functionality behind the scenes. Front End Developers work on the visual and interactive aspects users see and interact with. Both roles are essential in web development, often collaborating to create seamless digital experiences.

What are the key skills and qualifications needed to thrive as a Back End Developer, and why are they important?

To thrive as a Back End Developer, you need strong programming skills in languages like Java, Python, or Node.js, along with a solid understanding of databases and API design, typically supported by a degree in computer science or related experience. Familiarity with frameworks such as Spring or Django, version control systems like Git, and cloud platforms (e.g., AWS or Azure) is often required, with certifications in these areas considered beneficial. Problem-solving, effective communication, and teamwork are crucial soft skills that help developers collaborate and address complex technical challenges. These competencies are vital for building reliable, scalable systems that support front-end applications and ensure robust product performance.
More about Back End Developer jobs
What are the most commonly searched types of Back End Developer jobs in Colorado? The most popular types of Back End Developer jobs in Colorado are:
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What job categories do people searching Back End Developer jobs in Colorado look for? The top searched job categories for Back End Developer jobs in Colorado are:
What cities in Colorado are hiring for Back End Developer jobs? Cities in Colorado with the most Back End Developer job openings:
What are popular job titles related to Back End Developer jobs in CO? For Back End Developer jobs in CO, the most frequently searched job titles are:
Back End Developer jobs near you
Infographic showing various Back End Developer job openings in Colorado as of June 2026, with employment types broken down into 75% Full Time, 23% Part Time, and 2% Contract. Highlights an 91% Physical, 2% Hybrid, and 7% Remote job distribution, with an average salary of $126,273 per year, or $60.7 per hour.

Scala Developer

CosQube INC

Denver, CO • On-site

Contractor

Posted 12 days ago

Job description

Greetings from Cosqube,
Hope your day is Treating you well!
We are immediately hiring for the below given position, if you think you are right suitable resources for this opportunity based on your skills and expertise, please do share your updated resume along with contact details we will be happy to discuss in detail about this role.
 
Project Details:
Role: Scala Developer
Location: Denver, US
Duration:12+ Months Contract with Extension
Employment Type: C2C/C2H/W2
Interview Criteria: MS teams Video
Job Description:
 
  • Design and develop RESTful and GraphQL APIs using Java and Scala
  • Build event-driven services and microservices that produce and consume messages via Apache Kafka
  • Implement backend systems using frameworks like Spring Boot, Akka HTTP, or Play
  • Ensure reliable, fault-tolerant Kafka integration, including schema validation, error handling, and retries
  • Collaborate with frontend and platform teams to define clear API contracts and integration patterns
  • Contribute to code quality, testing, and CI/CD automation
  • Monitor, troubleshoot, and optimize performance of services and API endpoints
  • Strong programming experience with Scala (Akka, Play, or Cats/Scalaz) and Java (8+)
  • Hands-on experience with Apache Kafka (producer/consumer APIs, Avro/Protobuf, topic design)
  • Experience building and consuming RESTful APIs and optionally GraphQL APIs
  • Knowledge of functional programming and reactive patterns
  • Familiarity with Spring Boot, asynchronous programming, and dependency injection
  • Strong unit and integration testing practices
  • Comfortable with Git, CI/CD pipelines, and API security (OAuth2, JWT)

 Nice to Have

  • Kafka Streams or Akka Streams experience
  • Exposure to Kafka Connect, Schema Registry, and message validation patterns
  • Knowledge of Docker, Kubernetes, and cloud-native app development
  • Familiarity with API gateways (e.g., Kong, Apigee) or service mesh (e.g., Istio)