Software Engineer, Full Stack Developer

Description
TEKsystems is seeking a Software Engineer to help one of our clients in the Western suburbs of Chicago. This is a full time role and needs react and .net core experience.
Additional Skills & Qualifications
Bachelor's degree in Computer Science or other related field OR equivalent work experience.
5+ years of experience in software development in a distributed multi-tier environment.
Excellent written and verbal communication skills and the ability to create excellent software development lifecycle documentation.
Ability to work with a variety of programming languages.
Stays current with modern development techniques, trends, and best practices.
Proficient at taking a project from inception thru implementation including project planning, status reporting, requirements gathering, design, coding, unit and integration testing.
3-5+ years of experience as a Lead software engineer or equivalent technical lead position.
5+ years of experience with C#/.NET development
5+ years of experience with web development (HTML, JavaScript, CSS, jQuery)
2-3+ years of experience with Angular 2+ or similar JavaScript frameworks and libraries
5+ years of experience using Microsoft SQL Server, or similar RDBMS
3+ years of experience with Entity Framework.
3+ years of experience with API development.

Experience with service-oriented architectures.

Experience with Git and TFVC source control.

Experience with Visual Studio 2017+.

Experience with Agile principles and methodologies.
Understanding of OOP and SOLID principles.

Job Type & Location
This is a Permanent position based out of Oakbrook Terrace, IL.
Pay and Benefits
The pay range for this position is $110000.00 - $126000.00/yr.
2026 Open Enrollment is passive. If you do not complete Open Enrollment, 2025 benefits will roll over to 2026, EXCEPT the following, which REQUIRE Open Enrollment elections:

- FSA-Health Care and Dependent Care - HSA (Health Savers Medical Plan required) HDHP plan deductible increased to $3,400/$6,800. HMO Medical Plan Rx out of pocket max increased to $1,000/$3,000. Inpatient copay increased to $500 for first 3 days, Outpatient surgery copay increased to $200. Emergency Room co-pay increased to $300. CVS Maintenance Choice program added for 2026. Dental PPO plan surgical periodontics benefit coverage increased to 80%.

Maintenance choice has been added to our CVS pharmacy benefit. Health Care FSA maximum is $3,400; rollover is $40 minimum to $680 maximum. HSA maximum for enrollees of the Health Savers medical plan is $4,400 individual/$8,750 if you cover your spouse or child(ren). Add $1,000 if you are age 55+. 401(k) maximum employee deferral:

- $24,500 - $32,500 if you're age 50-59 or age 64+ in 2026 - $35,750 if you are age 60-63 in 2026 Starting in 2026, employees earning more than $150,000 in the previous year who are age 50 or older must make their 401k catch-up contributions as Roth contributions. This brochure highlights Joint Commission's Bene Flex Program. In the event there is any discrepancy between this brochure and the Plan documents, the Plan documents will
Workplace Type
This is a hybrid position in Oakbrook Terrace,IL.
Final date to receive applications
This position is anticipated to close on Jul 21, 2026.

About TEKsystems

We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change.

That's the power of true partnership. TEKsystems is an Allegis Group company.

The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

About TEKsystems and TEKsystems Global Services

We're a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. We're a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed.

We're strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. We're building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual…