Mid Frontend Developer Jobs in Colorado (NOW HIRING)

About DAT

DAT is an award-winning employer of choice and a next-generation SaaS technology company that has been at the leading edge of innovation in transportation supply chain logistics for 45 years. We continue to transform the industry year over year, by deploying a suite of software solutions to millions of customers every day - customers who depend on DAT for the most relevant data and most accurate insights to help them make smarter business decisions and run their companies more profitably. We operate the largest marketplace of its kind in North America, with 400 million freights posted in 2022, and a database of $150 billion of annual global shipment market transaction data. Our headquarters are in Denver, CO, and Beaverton, OR, with additional offices in Seattle, WA; Springfield, MO; and Bangalore, India. For additional information, see www.DAT.com/company

Job Application Deadline: 06/30/2026

The opportunity

As a Senior Frontend Software Engineer, your expertise will directly shape the architecture, quality, and long-term direction of our customer-facing products. You will drive the technical strategy for our end-to-end user experience, ensuring it scales with exponential growth and increasingly complex business requirements. This role is ideal for a seasoned engineer who leads by example - someone who thrives on translating complex data and workflows into intuitive interfaces, takes deep ownership of the full frontend lifecycle, and is energized by mentoring others while delivering high-impact work across our portfolio.

What You'll Do

• Design and Development: Design, build, and maintain highly performant, accessible, and responsive web applications using our core frontend stack and frameworks.
• Component Ownership: Take end-to-end ownership of key UI components and design system elements, including long-term strategy for performance optimization, cross-browser compatibility, and accessibility standards.
• Mentorship: Actively mentor junior and mid-level engineers through code reviews, pair programming, and knowledge sharing, fostering a culture of continuous growth and technical excellence.
• Collaboration: Partner closely with UX designers and engineer leaders (Principals and Staff) to translate business requirements and design specs into polished, production-ready interfaces.
• Quality Assurance: Champion a culture of quality by writing comprehensive unit, integration, and end-to-end tests, leading code reviews, and advocating for best practices in accessibility and maintainability.
• Observability: Define and implement frontend monitoring and alerting strategies using Datadog to track performance metrics, error rates, and user experience health in production.
• Incident Management: Lead the response and resolution of frontend-related production incidents, conduct root cause analyses, and drive the implementation of preventative measures at a systemic level.

The Skills and Experience You'll Bring

• At least 7 years of experience in frontend software development with a consistent track record of delivering high-quality, high-impact work at scale.
• Deep proficiency in modern JavaScript/TypeScript and the broader ecosystem, including build tooling, bundlers, and performance optimization.
• Expert-level knowledge of frontend frameworks such as Angular, React, and/or web components, with the ability to make and defend architectural choices between them.
• Proven experience designing, building, and evolving component libraries or design systems used across multiple teams or products.
• Strong command of RESTful and GraphQL APIs and patterns for integrating complex frontend applications with backend services.
• Hands-on experience deploying and managing frontend applications on AWS (e.g., CloudFront, S3), with an understanding of CDN strategy, caching, and infrastructure as it relates to frontend performance.
• Solid understanding of containerization (Docker) and CI/CD pipelines as they apply to frontend development workflows.
• Deep expertise in Datadog or equivalent tools for frontend monitoring, distributed tracing, logging, and observability.
• Mastery of web performance best practices, browser rendering pipelines, and accessibility (WCAG) standards - and the ability to evangelize these across the organization.
• Demonstrated ability to lead technical discussions, influence cross-functional stakeholders, and drive consensus on complex decisions.
• Experience working with AI and/or Spec Driven Development
• Excellent written and verbal communication skills, with experience presenting technical concepts to both technical and non-technical audiences.
• A Bachelor's degree in Computer Science, a related technical field, or equivalent practical experience.

Why DAT?
DAT is an award winning employer of choice.

For starters, we have a hybrid work environment, but we also know what makes a great workplace. We have a time-tested and resolute set of operating values predicated on integrity, mutual respect, open communication, and executing with excellence. These values inform our strategic vision as much as any one of our products does. We've been an employer of choice in the Portland metropolitan area for four decades, and within one year of opening our Denver office, DAT was #26 on Built In Colorado's 100 Best Places to Work In Colorado.

• Medical, Dental, Vision, Life, and AD&D insurance
• Parental Leave
• Up to 20 days of paid time off starting in year one
• An additional 10 holidays of paid time off per calendar year
• 401k matching (immediately vested)
• Employee Stock Purchase Plan
• Short- and Long-term disability sick leave
• Flexible Spending Accounts
• Health Savings Accounts
• Employee Assistance Program
• Additional programs - Employee Referral, Internal Recognition, and Wellness
• Free TriMet transit pass (Beaverton Office)
• Competitive salary and benefits package
• Work on impactful projects in a cutting-edge environment
• Collaborative and supportive team culture
• Opportunity to make a real difference in the trucking industry
• Employee Resource Groups

For Colorado-based candidates, in compliance with the Colorado Equal Pay for Equal Work Act, the salary range for this role is $143,000.00 - $183,000.00 + target bonus. DAT considers factors such as scope and responsibilities of the position, candidate's work experience, education and training, core skills, internal equity, and market and business elements when extending an offer.

DAT embraces the value of a diverse workforce, and believes it is a core strength of our company that we encourage those values in every DAT employee, at every level of our organization, regardless of tenure or rank. We provide equal employment opportunities (EEO) to all employees and applicants without regard to race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, disability, genetic information, marital status, amnesty, or status as a covered veteran in accordance with applicable federal, state, and local laws.

Equal Opportunity Employer/Protected Veterans/Individuals with Disabilities

The contractor will not discharge or in any other manner discriminate against employees or applicants because they have inquired about, discussed, or disclosed their own pay or the pay of another employee or applicant. However, employees who have access to the compensation information of other employees or applicants as a part of their essential job functions cannot disclose the pay of other employees or applicants to individuals who do not otherwise have access to compensation information, unless the disclosure is (a) in response to a formal complaint or charge, (b) in furtherance of an investigation, proceeding, hearing, or action, including an investigation conducted by the employer, or (c) consistent with the contractor's legal duty to furnish information. 41 CFR 60-1.35(c)

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