Role Overview
Randstad USA is hiring a mid-level Full Stack Backend Developer. This is a contract role in Englewood. Part of Randstad USA's Backend hiring. Full responsibilities, required qualifications, and the apply link are listed in the description below.
Resume Keywords to Include
Make sure these keywords appear in your resume to improve ATS scoring
Job Description
job summary
Sr. Software Development Engineer (Onsite)
Locations (Strictly Onsite): * Greenwood Village, CO * Berkeley Heights, NJ * Omaha, NE
Compliance & Work Authorization: * Green Card Holders: Must have been living and working in the United States for at least the last 3 years.
Background Check: Extensive 6-week process required post-offer.
location: Greenwood Village, Colorado
job type: Contract to Perm
salary: $70 - 80 per hour
work hours: 8am to 5pm
education: No Degree Required
responsibilities
Key Responsibilities
Design, build, and maintain applications using Java, Spring/Spring Boot/Spring Security as well as C#, .NET Framework, .NET Core, or .NET 6/7+
Develop RESTful APIs, microservices, and backend services
Integrate applications with databases using Entity Framework (EF) / EF Core and SQL Server
Collaborate with cross-functional teams using Agile/Scrum methodologies
Write clean, maintainable, and scalable code following industry best practices
Conduct code reviews, troubleshoot issues, and perform performance optimizations
Maintain and enhance CI/CD pipelines using tools such as GitHub Actions, Azure DevOps, etc.
Ensure application security using best practices such as authentication, authorization, and OWASP guidelines
Create documentation and participate in architectural discussions
qualifications
Required Skills & Qualifications
6+ years of back-end development experience
Strong proficiency in Java as well as C# and the .NET ecosystem
Experience with Spring/Spring Boot/Spring Security
Experience with ASP.NET Core, MVC, and Web API
Working knowledge of SQL Server, Entity Framework, LINQ
Familiarity with Azure (App Services, Functions, Storage, Key Vault)
Knowledge of OOP, SOLID principles, and design patterns
Experience with unit testing (xUnit, MSTest, NUnit)
Strong understanding of REST architecture
Proficiency with Git and CI/CD
Excellent debugging and problem‑solving skills
Preferred Qualifications
Experience with microservices architecture
Knowledge of Docker and containerized deployments
Exposure to Blazor, React, or Angular
Experience with message brokers like Azure Service Bus, RabbitMQ, or Kafka
Equal Opportunity Employer: Race, Color, Religion, Sex, Sexual Orientation, Gender Identity, National Origin, Age, Genetic Information, Disability, Protected Veteran Status, or any other legally protected group status.
At Randstad Digital, we welcome people of all abilities and want to ensure that our hiring and interview process meets the needs of all applicants. If you require a reasonable accommodation to make your application or interview experience a great one, please contact HRsupport@randstadusa.com.
Pay offered to a successful candidate will be based on several factors including the candidate's education, work experience, work location, specific job duties, certifications, etc. In addition, Randstad Digital offers a comprehensive benefits package, including: medical, prescription, dental, vision, AD&D, and life insurance offerings, short-term disability, and a 401K plan (all benefits are based on eligibility).
This posting is open for thirty (30) days.
Frequently Asked Questions
How do I apply for the Full Stack Backend Developer position at Randstad USA?
Use the Apply button above to submit your application directly to Randstad USA. Most applications take less than 5 minutes if your resume and contact details are ready, and you'll be routed to the employer's official application system to finish.
Where is the Full Stack Backend Developer position at Randstad USA located?
This position is based in Englewood. Randstad USA has not indicated remote or hybrid options for this role, so candidates should plan for on-site work.
What does a Full Stack Backend Developer at Randstad USA earn?
Randstad USA has not disclosed a salary range in this posting. Many employers share specifics later in the interview process; you can also ask during a recruiter screen if compensation transparency is important to you.
When was the Full Stack Backend Developer role at Randstad USA posted?
This role was posted on April 22, 2026 (56 days ago). It's still listed as actively hiring; we re-confirm openings against the source system multiple times per day and remove closed roles.
AI-powered job search
Get every job scored to your resume
Upload your resume and get jobs ranked, your resume tailored, and employee contacts found automatically.
Get Started FreeNo credit card to start