Jr Java Developer

O Fallon, IL

****This position requires an active DoD Clearance (Secret, Top Secret, Top Secret/SCI)

***Because an active clearance is required, U.S. Citizenship is required***

Description

Our client is seeking a Junior Developer to support the documentation and maintenance of software architectures, requirements, algorithms, interfaces, and designs-and to develop code under the guidance of SR. engineers. The Junior Developer will integrate software components, assist with testing to verify requirements, and support troubleshooting in a structured, standards-driven environment.

*This role requires an existing security clearance and is geared toward candidates with approximately 0 to 3 years of experience. This could include individuals who have recently completed a degree and gained experience through internships or early career roles

Key Responsibilities

Develop and maintain code; integrate software components into a functional software system.

Assist in creating and executing unit and component tests to verify software requirements.

Support software design and documentation using established methods, tools, and standards.

Troubleshoot defects of limited scope; collaborate to propose and implement fixes.

Contribute to build and integration activities; compile components and conduct limited target-environment testing.

Gather information to support software project management; document processes, tools, and basic metrics.

Assist in specifying and maintaining software requirements under SR engineer guidance.

Participate in research, prototypes, and continuous improvement activities.

Document work in accordance with policy and security requirements.

Required Qualifications

Active Secret clearance

Bachelor's degree in Computer Science, Engineering, Mathematics, Physics, or related field; or equivalent combination of education and experience.

Proficiency with Microsoft Office (Word, Excel, PowerPoint).

Strong communication, teamwork, and problem-solving skills; ability to follow instructions and meet deadlines.

Desired Qualifications

Experience creating error-free code under direction of SR developers.

Exposure to Windows and web development environments.

Experience writing software documentation (requirements, design notes, user guidance).

Familiarity with unit testing frameworks and modern development toolchains (e.g., Git).

Skills

software development, java

Top Skills Details

software development,java

Additional Skills & Qualifications

Java 8, Oracle 12C, HTML5, CSS, PLSQL, SQL, XML, JavaScript, scripting languages

Experience Level

Entry Level

Job Type & Location

This is a Contract to Hire position based out of O'Fallon, IL.

Pay and Benefits

The pay range for this position is $25.00 - $30.00/hr.

Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following: • Medical, dental & vision • Critical Illness, Accident, and Hospital • 401(k) Retirement Plan – Pre-tax and Roth post-tax contributions available • Life Insurance (Voluntary Life & AD&D for the employee and dependents) • Short and long-term disability • Health Spending Account (HSA) • Transportation benefits • Employee Assistance Program • Time Off/Leave (PTO, Vacation or Sick Leave)

Workplace Type

This is a hybrid position in O'Fallon,IL.

Application Deadline

This position is anticipated to close on Mar 31, 2026.

h4> 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 TEKsystems.com.

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 orientation, gender identity, genetic information or any characteristic protected by law.

Posted 2026-03-23

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