Overview:

Under limited supervision, the Software Engineer / Application Developer is responsible for designing, developing, maintaining, and enhancing enterprise, mission-critical applications that support programs and enterprises. This role focuses on supporting and modernizing existing production systems, ensuring system reliability, data integrity, security compliance, and proper documentation.

The Software Engineer works closely with business analysts, project managers, infrastructure teams, security teams, and external vendors to deliver secure, stable, and well-documented solutions in a regulated, process-driven environment.

Skills and Experience:

Required Professional Experience

4+ years of professional software development experience supporting enterprise or large-scale systems.
Experience working in regulated environments such as government, healthcare, insurance, financial services, or other compliance-driven organizations.
Demonstrated experience maintaining, enhancing, and modernizing existing applications, including working with legacy systems and upgrading platforms incrementally.
Hands-on experience supporting production systems, including troubleshooting issues, implementing fixes, and participating in scheduled releases or deployments.
Experience developing and modifying data-driven applications, including writing and optimizing complex SQL queries and supporting business-critical reporting.
Experience working within a formal Software Development Life Cycle (SDLC), including documentation, change control, and release management.
Experience collaborating with business analysts, project managers, infrastructure teams, security teams, and external vendors to deliver integrated solutions.

Enterprise application development experience (4+ years)

Experience in maintaining and enhancing existing production systems

Legacy system support and modernization experience

Proficiency in one primary enterprise stack:

.NET / C# / ASP.NET (MVC or Core) OR
Java / J2EE OR
Python (Django / FastAPI)
Strong SQL skills (complex queries, joins, performance tuning)

Benefits:

Don't miss this chance to enhance your experience in a production environment while enjoying competitive pay and a comprehensive benefits package.

Weekly pay
$5 prescription drugs
$5 doctor's visit copays
Free teledoctor service
Free counseling services
Life insurance included
Vision insurance included
Dental insurance included
Vacation and holiday pay
Scholarship Opportunities
401(k) retirement plan
Free legal services
Our unbeatable employee discount program

Apply now so we can hold a spot for you. We can’t wait to talk to you!

––Your Ōnin team

Onin Staffing

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Software Engineer (Application Developer)