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Senior Javascript Engineer Jobs in Colorado (NOW HIRING)

SumUp

Senior Platform Engineer

Boulder, CO · On-site

Senior Platform Engineer - US Platform Team NOTE: We are unable to sponsor or take over sponsorship ... or JavaScript/TypeScript * Comfort working across globally distributed teams, with the ...

Leidos

Senior Test Engineer

Englewood, CO · On-site

$107K - $195K/yr

Leidos is seeking an experienced Senior Test Engineer to join the Chinook Program supporting an ... Familiarity with scripting languages including JavaScript, and Python. * Knowledge of containerized ...

PNC Bank

Software Engineer Sr (Java)

Arvada, CO · On-site

$86K - $158K/yr

As a Software Engineer Sr within PNC's C&IB's organization, you will be based in Pittsburgh, PA ... React, JavaScript, HTML/CSS Database: Oracle / PostgreSQL / MongoDB CI/CD: Jenkins, GitHub/GitLab ...

Infojini Inc

Sr. Web Developer

Denver, CO

We offer an excellent compensation package We are looking for Sr. Web Developer in Denver, CO for ... Minimum 3-5 years in enterprise web development CSS, HTML5, JavaScript * Minimum 3 years experience ...

Dredsoft Labs

Senior Blockchain Developer

Almont, CO

$70 - $80/hr

Senior Blockchain Developer in United States (Global) We are seeking a talented and experienced ... Proficiency in programming languages such as Solidity, JavaScript, or Python. * Deep understanding ...

AtkinsRéalis

Senior Software Developer

Denver, CO · On-site

$56 - $74/hr

They are seeking a Senior Software Developer to lead the design, development, and delivery of ... and JavaScript/Node.js • Collaborate with clients and stakeholders to analyze business needs ...

Kiewit Corporation

Sr AI Engineer

Lone Tree, CO · On-site +1

$103K - $141K/yr

Senior Level Home District/Group: DHO Information Technology Group Department: Technology Group ... Languages: C#, Python, Node.js (JavaScript/TypeScript), RESTful APIs * AI: Azure AI Foundry ...

MGMA-ACMPE

Senior Software Engineer

Englewood, CO · On-site

$115K - $140K/yr

The Senior Software Developer is responsible for developing dynamic services for the Medical Group ... Solid understanding of HTML5, CSS, and JavaScript. * Solid understanding and knowledge of commonly ...

New

Cleerly

Sr. DevOps Engineering Manager

Denver, CO

$133K - $171K/yr

Python * TypeScript * JavaScript * Java * C# * C++ * Ruby * Rust * Bash or Shell scripting ... Experience establishing SRE practices, service-level objectives, operational metrics, and incident ...

Campminder

Senior DevOps Engineer

Boulder, CO · On-site +1

$215K/yr

Net Framework and legacy JavaScript Framework systems into a modular, platform-focused architecture ... fewer senior-level positions. With that in mind, we encourage you to apply if you\'re not sure ...

Motocol

Senior Software Developer .NET

Englewood, CO · On-site

$70 - $80/hr

Our client is seeking a Senior Software Developer for our Englewood, CO office. Work with a small ... Strong C#, strong HTML and JavaScript; Familiarity and experience with Visual Studio 2010 or later ...

F5, Inc.

Sr Web Developer

Louisville, CO · On-site

$163K - $244K/yr

Position Summary The Sr. Software Engineer provides software development support by analyzing ... Experience with frontend tools & technologies, such as Next.js, Webpack, modern JavaScript ...

Leidos

Senior Test Engineer

Englewood, CO

$107K - $195K/yr

We're looking for a passionate Senior Test Engineer to join the Chinook Program to support one of ... JavaScript, Python). * Familiarity with enterprise applications and large-scale systems.

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All JobsJavascript Engineer JobsSenior Javascript Engineer JobsSenior Javascript Engineer Jobs in Colorado

Senior Javascript Engineer information

See Colorado salary details

$131.4K

$176.2K

$200.8K

How much do senior javascript engineer jobs pay per year?

As of Aug 14, 2026, the average yearly pay for senior javascript engineer in Colorado is $176,213.00, according to ZipRecruiter salary data. Most workers in this role earn between $164,000.00 and $189,800.00 per year, depending on experience, location, and employer.

What does a senior JavaScript engineer do?

A Senior JavaScript Engineer is responsible for designing, developing, and maintaining complex web applications using JavaScript and related technologies. They often lead development teams, make architectural decisions, and ensure best coding practices are followed. In addition to writing code, they may mentor junior developers, review code for quality, and collaborate with cross-functional teams to deliver high-quality software solutions.

What are some common challenges faced by senior JavaScript engineers when leading projects with cross-functional teams?

Senior JavaScript Engineers often encounter challenges such as aligning frontend and backend development timelines, ensuring code quality across distributed teams, and effectively communicating complex technical concepts to non-technical stakeholders. Managing dependencies between various team members and integrating new technologies or frameworks can also present difficulties. Successful engineers overcome these challenges by fostering clear communication, implementing robust documentation, and promoting collaborative problem-solving within agile workflows.

What are the key skills and qualifications needed to thrive as a senior JavaScript engineer?

To thrive as a Senior Javascript Engineer, you need deep expertise in JavaScript, modern front-end frameworks (like React or Angular), and a solid grasp of software engineering principles, typically supported by a degree in computer science or equivalent experience. Familiarity with build tools (Webpack, Babel), version control systems (Git), and automated testing frameworks is crucial for efficient development. Strong problem-solving skills, effective communication, and leadership abilities help you mentor team members and collaborate on complex projects. These skills are vital for delivering high-quality, scalable applications and driving innovation within development teams.

What are the most commonly searched types of Javascript Engineer jobs in Colorado?

The most popular types of Javascript Engineer jobs in Colorado are:

What are popular job titles related to Senior Javascript Engineer jobs in Colorado?

For Senior Javascript Engineer jobs in Colorado, the most frequently searched job titles are:

What job categories do people searching Senior Javascript Engineer jobs in Colorado look for?

The top searched job categories for Senior Javascript Engineer jobs in Colorado are:

What cities in Colorado are hiring for Senior Javascript Engineer jobs?

Cities in Colorado with the most Senior Javascript Engineer job openings:

What are popular job titles related to Senior Javascript Engineer jobs in CO?

For Senior Javascript Engineer jobs in CO, the most frequently searched job titles are:

Senior Javascript Engineer jobs near you
Infographic showing various Senior Javascript Engineer job openings in Colorado as of August 2026, with employment types broken down into 90% Full Time, 5% Part Time, and 5% Contract. Highlights an 86% Physical, 5% Hybrid, and 9% Remote job distribution, with an average salary of $176,213 per year, or $84.7 per hour.

Senior Platform Engineer

SumUp

Boulder, CO • On-site

Full-time

Medical, Life, Retirement, PTO

Posted 14 days ago

Job description

Senior Platform Engineer - US Platform Team
NOTE: We are unable to sponsor or take over sponsorship of an employment Visa at this time.
Boulder, CO, USA | Full-time | Office First
Check out our Boulder office
Team description
The US Platform team is the engineering backbone that keeps SumUp's product teams moving. We build and maintain the cloud infrastructure, tooling, and developer environments that hundreds of engineers across the US depend on every day. As we grow, we're making a deliberate investment in senior expertise to raise the bar on how we build, standardize, and connect our platform work globally.
This is a pivotal role at the intersection of infrastructure and developer experience. You'll be the primary technical bridge between our US Platform team and our global Platform Infrastructure organization, ensuring both move in the same direction with shared standards, a unified codebase, and a clear roadmap. If you're energized by making complex systems simpler for the people who build on them, this is the role for you.
What you'll do
  • Design and implement infrastructure-as-code solutions, driving automation of manual processes and improving deployment speed and reliability across the US engineering organization
  • Act as the technical connector between the US Platform team and the global Platform Infrastructure team, establishing shared standards, runbooks, and a joint technical roadmap
  • Improve our monitoring, observability, and incident response processes, including cross-timezone on-call coordination and post-mortem practices
  • Build internal tooling and self-service capabilities that help product engineering teams deploy, monitor, and scale services independently
  • Lead the migration of US infrastructure into a unified, cohesive platform, treating our internal platform surfaces with the same intentionality we bring to customer-facing products
You'll be great for this role if...
  • Proven experience in platform, DevOps, or infrastructure engineering at a senior level in complex, distributed environments (~8+ years)
  • Deep expertise in AWS services (EC2, S3, RDS, VPC, IAM, EKS) and advanced Kubernetes, including cluster design, multi-tenant management, and upgrade strategies
  • Strong proficiency in Infrastructure as Code (Terraform and/or CloudFormation at scale) and CI/CD design using tools such as Jenkins, GitHub Actions, or ArgoCD
  • Experience with service mesh technologies (Istio preferred), observability platforms (Prometheus, Grafana, ELK/OpenSearch), and proficiency in Go, Python, or JavaScript/TypeScript
  • Comfort working across globally distributed teams, with the communication skills to influence both technical and non-technical stakeholders and the mindset to thrive in async, cross-timezone environments
Compensation
  • Base Salary range for this position is $160-$185K annually
  • Stock Option Plan participation
  • Compensation will be finalized based on the candidate's experience and location
Why you should join SumUp
Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our Boulder office. This involves an office-first setup
Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced
Enrollment onto our Virtual Stock Option program: you will own a stake in SumUp's future success
A dedicated annual L&D budget for your individual development, which can be used to attend conferences and/or advance your career through further education
Generous time off: 22 days of paid vacation, plus an extra day each year up to 28 days, public holidays, quarterly Wellness Days, and special leaves
Health and life coverage: medical coverage via Cigna & Kaiser, plus life insurance
Financial security: 401(k) retirement scheme with SumUp matching (100% on first 1%, 50% on 2-6%)
Break4me: 1-month sabbatical after 3 years of service Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team
About SumUp
Be empowered to do more that matters.
At SumUp, we're on a mission to empower small businesses across the globe by providing simple and affordable tools that allow them to thrive. Today, over 4 million businesses in 37 markets rely on SumUp as their financial partner to manage payments, finance and customer relationships.
Our commitment to small businesses is reflected in our diverse team of over 3,000 SumUppers from over 90 nationalities, united by global collaboration and an innovative mindset. Our core values lay the foundation for who we are and what we stand for, shaping our work culture and driving our success. We foster inclusivity and a continuous learning culture, providing a safe space for personal and professional growth. Our differences make us unique and strong as we strive to create an environment where everyone belongs and feels supported, no matter how they identify.
SumUp is proud to be an Equal Employment Opportunity employer, actively seeking and embracing diversity in our workforce. We don't make hiring or employment decisions based on race, color, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. Our commitment extends beyond recruitment to creating a safe and respectful workplace where harassment of any form is strictly prohibited. Discover more about our culture and opportunities on our careers website, and follow our journey on LinkedIn, Instagram, and TikTok.
#SumUpUSA
Job Application Tip
We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don't tick every box, it's ok too because it means you have room to learn and develop your career at SumUp.

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