Full Stack Engineer

Full Stack Engineer - Contract - Denver, CO - $65.00 - $67.00/hr.

The final salary or hourly wage, as applicable, paid to each candidate/applicant for this position is ultimately dependent on a variety of factors, including, but not limited to, the candidate's/applicant's qualifications, skills, and level of experience as well as the geographical location of the position.

Applicants must be legally authorized to work in the United States. Sponsorship not available.

Our client is seeking an Full Stack Engineer in Denver, CO.

Role Description

We are looking for a highly skilled Senior Full Stack Engineer to design, develop, and deliver scalable, secure, and high-performing web applications. The ideal candidate has strong expertise across front-end and back-end technologies, enjoys end-to-end ownership, and thrives in collaborative, fast-paced environments.

Design, develop, and maintain end-to-end web applications using modern front-end and back-end technologies
Build scalable, reusable UI components using React
Develop robust backend services and APIs using Java, Node.js, or similar technologies
Design and integrate RESTful APIs and backend services
Work closely with product managers, UX designers, and translate requirements into technical solutions
Ensure application performance, security, scalability, and reliability
Participate in architecture and design discussions; contribute to technical decisions
Write clean, maintainable, well-tested code following best practices
Review code, mentor junior engineers, and uphold engineering standards
Support production releases, troubleshooting, and on-call rotations as needed

Skills & Requirements

5-8 years of experience in full-stack software development
Strong experience with React, JavaScript (ES6+), HTML, CSS
Backend experience with Java (Spring Boot) or Node.js
Strong understanding of REST APIs, microservices, and distributed systems
Experience working with relational and/or NoSQL databases (PostgreSQL, DynamoDB, etc.)
Familiarity with authentication, authorization, and security best practices
Experience with Git, CI/CD pipelines, and automated testing
Solid understanding of cloud-native application development
Experience with TypeScript AND JAVA
Exposure to Next.js or modern frontend frameworks
Experience with AWS (EC2, ECS/EKS, Lambda, RDS, DynamoDB, S3)
Familiarity with containerization (Docker, Kubernetes)
Experience with event-driven architectures (Kafka, SNS/SQS)
Background in retail, POS, or enterprise systems
Strong ownership mindset and accountability
Excellent communication and collaboration skills
Ability to balance speed with quality
Experience working in agile / Scrum environments
Passion for learning and improving engineering practices

Benefits/Other Compensation

This position is a contract/temporary role where Hays offers you the opportunity to enroll in full medical benefits, dental benefits, vision benefits, 401K and Life Insurance ($20,000 benefit).

Why Hays?

You will be working with a professional recruiter who has intimate knowledge of the industry and market trends. Your Hays recruiter will lead you through a thorough screening process in order to understand your skills, experience, needs, and drivers. You will also get support on resume writing, interview tips, and career planning, so when there's a position you really want, you're fully prepared to get it.

Nervous about an upcoming interview? Unsure how to write a new resume?

Visit the Hays Career Advice section to learn top tips to help you stand out from the crowd when job hunting.

Hays is committed to building a thriving culture of diversity that embraces people with different backgrounds, perspectives, and experiences. We believe that the more inclusive we are, the better we serve our candidates, clients, and employees. We are an equal employment opportunity employer, and we comply with all applicable laws prohibiting discrimination based on race, color, creed, sex (including pregnancy, sexual orientation, or gender identity), age, national origin or ancestry, physical or mental disability, veteran status, marital status, genetic information, HIV-positive status, as well as any other characteristic protected by federal, state, or local law. One of Hays' guiding principles is 'do the right thing'.
We also believe that actions speak louder than words.
In that regard, we train our staff on ensuring inclusivity throughout the entire recruitment process and counsel our clients on these principles. If you have any questions about Hays or any of our processes, please contact us.

In accordance with applicable federal, state, and local law protecting qualified individuals with known disabilities, Hays will attempt to reasonably accommodate those individuals unless doing so would create an undue hardship on the company. Any qualified applicant or consultant with a disability who requires an accommodation in order to perform the essential functions of the job should call or text .

Drug testing may be required; please contact a recruiter for more information.

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