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Senior Web Developer Jobs in Boulder, CO (NOW HIRING)

Rapid7Proplusdemo

Web Developer

Denver, CO · On-site

Senior Web Developer responsibilities include leading a team of junior developers, refining website specifications and resolving technical issues. To be successful in this role, you should have ...

Infojini Inc

Sr. Web Developer

Denver, CO

We offer an excellent compensation package We are looking for Sr. Web Developer in Denver, CO for 6+ months contract position. Please refer someone else if you are not available at this time or you ...

BisectHosting Careers

Web Developer

Denver, CO · On-site

As a Web Developer (SDE1) at BisectHosting, you'll help build and improve customer-facing and ... senior engineers. Requirements: What you'll work on: * Build and improve customer-facing ...

Bentley Systems

Sr. Optimizely Developer

Arvada, CO · On-site +1

$117K - $154K/yr

Senior Product Manager, Web Experience & Growth Direct reports: 0 Location: Hybrid, Denver, CO or ... We want an engineer who is not just a master of the Optimizely stack, but someone who is highly AI ...

Pwc

GIS Web AI Developer, Senior Associate

Denver, CO · On-site

$77K - $202K/yr

Industry/Sector Not Applicable Specialism Functional & Industry Technologies Management Level Senior Associate & Summary The Opportunity As a GIS Web AI Developer, Senior Associate, you will play a ...

Infojini Inc

Sr Java Developer

Denver, CO · On-site

$59 - $75.25/hr

We are looking for a Senior Java Developer with experience in building high-performing, scalable ... Java Web Services, Oracle SQL Developer, JSP, EJB, Struts, Spring, Ant, JSF JMS, XML, JBoss ...

Horizontal Talent

Sr. Optimizely Developer

Denver, CO · Remote

$118K - $155K/yr

Join a fast-moving digital marketing team that is investing heavily in modern web technology, experimentation, and data-driven growth. This Senior Optimizely Developer role is a great fit for someone ...

Quantix

C# Developer, Sr.

Arvada, CO

$55.50 - $73.25/hr

Job Title: C# Developer, Sr. Location: Arvada, CO Type: Direct Hire Our client in the Arvada ... Experience developing rich UI web applications is needed, and experience developing multi-lingual U ...

Quantix, Inc.

C# Developer, Sr.

Arvada, CO · On-site

$55.75 - $73.75/hr

... Senior C# Developer to join their team. This role involves developing commercial software in an ... NET development • developing rich UI web applications • developing multi-lingual UI ...

Horizontal Talent

Senior Optimizely CMS Developer

Denver, CO · Remote

$116K - $152K/yr

Join a fast-moving digital marketing team that is investing heavily in modern web technology, experimentation, and data-driven growth. This Senior Optimizely Developer role is a great fit for someone ...

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All JobsWeb Developer JobsSenior Web Developer JobsSenior Web Developer Jobs in Boulder, CO

Senior Web Developer information

See Boulder, CO salary details

$62.7K

$118.8K

$185.6K

How much do senior web developer jobs pay per year?

As of Sep 7, 2026, the average yearly pay for senior web developer in Boulder, CO is $118,807.00, according to ZipRecruiter salary data. Most workers in this role earn between $94,400.00 and $136,400.00 per year, depending on experience, location, and employer.

What is a senior web developer?

A senior web developer is a highly skilled computer coding professional with fluency in languages such as HTML, JavaScript, and CSS. In this career, your responsibilities include designing, developing, and debugging the backend of software programs for websites, applications, tools, and databases. You also work with JavaScript frameworks, develop tests using testing frameworks, help build and deploy automation scripts, troubleshoot, and resolve app performance issues. As a senior web developer, you may supervise a team of developers and collaborate with user experience designers to determine what the frontend user experience and website layout will look like during the design phase. Other duties may include enforcing coding standards, reviewing the work completed by your team, managing the budget and project schedule, and communicating directly with clients.

What are the key skills and qualifications needed to thrive as a senior web developer, and why are they important?

To thrive as a Senior Web Developer, you need advanced proficiency in programming languages like JavaScript, HTML, CSS, and backend frameworks, supported by a bachelor’s degree in computer science or equivalent experience. Expertise in tools such as version control (Git), CI/CD pipelines, and knowledge of modern frameworks (React, Angular, Node.js) are typically required, along with relevant certifications. Strong problem-solving ability, effective communication, and leadership skills help you collaborate across teams and mentor junior developers. These competencies ensure high-quality, scalable web solutions and support successful project delivery in dynamic development environments.

What are some common challenges faced by senior web developers when leading project teams?

Senior Web Developers often encounter challenges such as balancing hands-on coding responsibilities with mentoring junior team members and ensuring project deadlines are met. They must also navigate evolving technologies and frameworks, which requires ongoing learning and adaptability. Effective communication with designers, backend developers, and project managers is essential to align technical solutions with business goals. Successfully managing these aspects leads to smoother project delivery and professional growth.

What is the difference between Senior Web Developer vs Web Developer?

AspectSenior Web DeveloperWeb Developer
Required CredentialsBachelor's in CS or related, experience, possibly certificationsBachelor's in CS or related, entry-level or junior experience
Work EnvironmentCollaborates on complex projects, mentors juniorsDevelops websites, learns on the job, less responsibility
Employer & Industry UsageTech companies, agencies, startupsSmall businesses, startups, freelance projects
Search & Comparison IntentUnderstanding senior roles, career progressionEntry-level, learning web development

The main difference between a Senior Web Developer and a Web Developer lies in experience, responsibilities, and expertise. Senior Web Developers handle complex projects, mentor team members, and often have more advanced skills and certifications. Web Developers are typically entry-level or junior roles focused on building websites and gaining experience. Both roles are essential in the tech industry, but the senior position involves greater leadership and technical depth.

More about Senior Web Developer jobs

What are the most commonly searched types of Web Developer jobs in Boulder, CO?

The most popular types of Web Developer jobs in Boulder, CO are:

What job categories do people searching Senior Web Developer jobs in Boulder, CO look for?

The top searched job categories for Senior Web Developer jobs in Boulder, CO are:

What cities near Boulder, CO are hiring for Senior Web Developer jobs?

Cities near Boulder, CO with the most Senior Web Developer job openings:

Senior Web Developer jobs near you

Web Developer

Rapid7Proplusdemo

Denver, CO • On-site

Full-time

Re-posted 26 days ago

Job description

Web Developer responsibilities include:
  • Identifying user and system requirements for new websites and applications
  • Prioritizing software development projects, setting timelines and assigning tasks to team members
  • Creating wireframes to decide on layout

Job brief:
We are looking for a Senior Web Developer to build and maintain functional web pages and applications. Senior Web Developer responsibilities include leading a team of junior developers, refining website specifications and resolving technical issues. To be successful in this role, you should have extensive experience building web pages from scratch and in-depth knowledge of at least one of the following programming languages: Javascript, Ruby or PHP. Ultimately, you will ensure our web pages are up and running and cover both internal and customer needs.

Responsibilities:
  • Identify user and system requirements for new websites and applications
  • Prioritize software development projects, set timelines and assign tasks to team members
  • Create wireframes to decide on layout
  • Write or review code for various applications
  • Run functionality testings and debug code
  • Oversee junior web developers and evaluate their performance
  • Liaise with designers to decide on UI/UX elements (like graphics and navigation buttons)
  • Ensure our software documentation is up-to-date
  • Collaborate with mobile developers to build mobile-responsive websites
  • Requirements
  • Work experience as a Senior Web Developer
  • Expertise in at least one programming language, preferably Javascript, Ruby or PHP
  • Solid knowledge of HTML/CSS
  • Experience with mockup and UI prototyping tools
  • Understanding of security practices
  • Familiarity with network diagnostics tools
  • Team management skills
  • BSc/MSc in Computer Science or relevant field
Employment Type: FULL_TIME

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