Senior Software Engineer

We are seeking a senior software engineer with strong system design instincts and an interest in shaping how systems evolve over time. This is a hands-on role focused on building, maintaining, and improving production software while contributing to technical direction and architectural decisions. You'll work closely with cross-functional teams to deliver scalable, reliable solutions, with opportunities to take on increasing system-level responsibility as the product and organization grow. Main Responsibilities

• Design, develop, test, and maintain software solutions across the stack, from backed services to front end interfaces.

• Collaborate with product, design, and operations teams to translate requirements into robust, scalable, and maintainable software.

• Own features and services end to end, contribute to system architecture discussions, and support critical initiatives across services.

• Observe and analyze existing systems to identify improvement opportunities; propose and implement enhancements with a focus on reliability, performance, and security.

• Write clean, documented, and testable code; contribute to design reviews, code reviews, and best-practice governance.

• Embrace ownership mindset: take initiative to solve problems, propose new ideas, and drive them to completion.

• Mentor junior teammates where appropriate and learn from peers to broaden your technical horizons.

• Proven experience as a senior software engineer (hands-on coding in one or more major languages and ecosystems).

• A demonstrated interest in software architecture and system design; a track record of thinking beyond code to consider structure, scalability, and maintainability.

• A flexible, "utility player" mindset: comfortable working across the stack, embracing new challenges, and quickly adapting to changing priorities.

• Strong problem-solving skills, curiosity, and a bias for action; willingness to take initiative to move projects forward.

• Collaboration and communication skills: ability to articulate technical concepts clearly to both technical and non-technical stakeholders.

• Exhibits a growth-oriented mindset with a drive to broaden system-level influence and progressively lead architectural direction

• Experience with cloud platforms (AWS, GCP, Azure) and modern DevOps practices.

• Familiarity with software design patterns, microservices, APIs, and data modeling.

• Prior exposure to architecture documentation, diagrams, and decision records.

• Contributions to open-source projects or personal side projects that demonstrate architectural thinking.

$130,320 - $159,280, The Colas USA Family of Companies provides competitive pay, outstanding benefits, career advancement opportunities, professional education, and extensive training for every employee. We pride ourselves on upholding the highest standards of safety, environmental conservation, and ethical conduct as we strive to grow our infrastructure products and services through empowering and developing our people, fostering innovation, utilizing new technology, and maximizing vertical integration at all levels of the company's value chain. To learn more about the Colas USA Family of Companies, please visitwww.colasusa.com. Mission

Colas IS Support is the information technology arm of the North America business for Colas and is based in Denver, Colorado. Colas ISS strives to make Colas an industry leader through developing custom mobile applications and business intelligence tools, supporting core applications, maintaining our infrastructure, and much more. Through a partnership with the Colas Companies in the USA & Canada Colas IS Support helps empower our employees for success while also providing direct contact with users and other innovators across the organization. To learn more about Colas IS Support visit www.colasiss.com/.