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Entry Level Software Engineer Jobs in O Fallon, MO

Maritz

Software Engineer I

Fenton, MO · On-site

The Software Engineer I supports the development of software that serves Maritz technology, working ... What You'll Be Doing We are looking for an entry level engineer who is eager to learn and build ...

Maritz

Software Engineer I

Fenton, MO · On-site

The Software Engineer I supports the development of software that serves Maritz technology, working ... What You'll Be Doing We are looking for an entry level engineer who is eager to learn and build ...

Mastercard, Inc.

Software Engineer II

O Fallon, MO · On-site

$92K - $147K/yr

A Software Engineer II is an early-career or entry-level engineer who contributes to the design, development, testing, and maintenance of software solutions under the guidance of more senior ...

MasterCard

Software Engineer II

O Fallon, MO

$92K - $147K/yr

A Software Engineer II is an earlycareer or entrylevel engineer who contributes to the design, development, testing, and maintenance of software solutions under the guidance of more senior engineers.

Boeing

Entry-Level Manufacturing Engineer

Berkeley, MO · On-site

Entry-Level Manufacturing Engineer Company: The Boeing Company Boeing Test & Evaluation (BT&E) is ... The Production Test team delivers and supports special test equipment, processes, and software for ...

New

Pwc

AI Engineer

Saint Louis, MO · On-site

$55K - $187K/yr

Within our Internal Firm Services practice, you will apply data, algorithms, and software ... PwC does not intend to hire experienced or entry level job seekers who will need, now or in the ...

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All JobsSoftware Engineer JobsEntry Level Software Engineer JobsEntry Level Software Engineer Jobs in O'Fallon, MO

Entry Level Software Engineer information

See O Fallon, MO salary details

$22.4K

$98.1K

$176.7K

How much do entry level software engineer jobs pay per year?

As of Aug 7, 2026, the average yearly pay for entry level software engineer in O'Fallon, MO is $98,054.00, according to ZipRecruiter salary data. Most workers in this role earn between $60,800.00 and $112,200.00 per year, depending on experience, location, and employer.

What is the difference between Entry Level Software Engineer vs Software Developer?

AspectEntry Level Software EngineerSoftware Developer
Required CredentialsBachelor's in CS or related field; some internshipsBachelor's in CS or related; coding experience
Work EnvironmentTeam-based, collaborative projects, entry-level tasksProject-focused, coding, debugging, and implementation
Employer & Industry UsageTech companies, startups, IT departmentsSoftware firms, tech startups, enterprise IT
Common Search & ComparisonYesYes

Entry Level Software Engineers and Software Developers often share similar educational backgrounds and work environments. The main difference lies in their roles: engineers may focus more on designing systems and architecture, while developers typically concentrate on coding and implementation. Both roles are essential in tech industries and often overlap in job functions, but understanding these distinctions helps job seekers target the right positions.

What types of projects do entry level software engineers typically work on, and how do they collaborate with other team members?

Entry level software engineers often start by working on smaller features, bug fixes, or assisting with testing and documentation within larger projects. They usually collaborate closely with senior engineers, product managers, and QA teams through code reviews, daily stand-ups, and pair programming sessions. This structure helps new engineers learn best practices, understand the codebase, and gradually take on more complex assignments. Effective communication and a willingness to learn are key to success in these collaborative environments.

What does an entry level software engineer do?

An entry level software engineer is responsible for assisting in the design, development, testing, and maintenance of software applications. They typically work under the guidance of more experienced engineers and may write code, debug programs, and participate in code reviews. The role often involves learning company-specific tools and workflows, collaborating with team members, and continuously improving technical skills. Entry level software engineers are expected to adapt quickly, communicate effectively, and contribute to the team's overall goals.

What are the key skills and qualifications needed to thrive as an entry level software engineer, and why are they important?

To thrive as an Entry Level Software Engineer, you need a solid understanding of programming languages (such as Java, Python, or C++), computer science fundamentals, and often a relevant bachelor’s degree. Familiarity with version control systems like Git, development frameworks, and basic software development tools is typically expected. Strong problem-solving abilities, eagerness to learn, and effective collaboration are standout soft skills in this role. These skills are crucial for building reliable software, adapting to evolving technologies, and contributing productively to team projects.

What does an entry level software engineer do?

An Entry-Level Software Engineer, also called a Junior Engineer, works with a team of mid-level and senior engineers to develop, test, and maintain software applications and programs. The job duties of Junior Software Engineers typically include relatively simple routine tasks, such as debugging, testing, and code documentation. These tasks hone a Junior Engineer’s skills and familiarize them with the company’s code base. As Software Engineers gain more years of experience, they work on more complex development projects.

What is the entry-level position for a software engineer?

The entry-level position for a software engineer is typically called a Software Engineer I or Junior Software Engineer. It involves basic coding, debugging, and learning company tools and processes, often requiring familiarity with programming languages like Java, Python, or C++. This role provides foundational experience and may require a bachelor's degree in computer science or related fields.

How to get a job as an entry level software engineer with no experience?

To secure an entry level software engineer position with no experience, focus on building a strong foundation in programming languages like Python or Java, create a portfolio of personal projects, and gain familiarity with tools such as Git and Linux. Internships, coding bootcamps, and certifications can also improve your chances by demonstrating practical skills to employers.

Is 25 too late to become an entry level software engineer?

Entry level software engineering roles are open to individuals of various ages, including those starting in their mid-20s. Many employers value skills, relevant training, and problem-solving ability over age, and career changers often successfully transition into software engineering at this stage by learning programming languages and gaining practical experience. Age is generally not a barrier to entering the field at an entry level.
More about Entry Level Software Engineer jobs
What are the most commonly searched types of Software Engineer jobs in O'Fallon, MO? The most popular types of Software Engineer jobs in O'Fallon, MO are:
What cities near O'Fallon, MO are hiring for Entry Level Software Engineer jobs? Cities near O'Fallon, MO with the most Entry Level Software Engineer job openings:
Entry Level Software Engineer jobs near you
Infographic showing various Entry Level Software Engineer job openings in O'Fallon, MO as of July 2026, with employment types broken down into 83% Full Time, 14% Part Time, and 3% Contract. Highlights an 88% Physical, 3% Hybrid, and 9% Remote job distribution, with an average salary of $98,054 per year, or $47.1 per hour.

TS/SCI -Entry-Level Software Developer (Python Required) with Security Clearance

Bailey Information Technology, LLC

Saint Louis, MO • On-site

$47 - $64.75/hr

Other

Posted 6 days ago

Job description

Bailey Information Technology, LLC TS/SCI -Entry-Level Software Developer (Python Required) * St. Louis, MO Entry-Level Software Developer (Python Required) Location: St. Louis, MO Clearance: HSPD-12 / ability to obtain TS/SCI w/ Poly Required Certifications: DD8140 compliant Certification (Security+) w/in 3 months Level: T1 (Target) Job Description: The BIT, LLC is recruiting for a junior (entry level) software developer to work on the design and coding with software solutions for the Aeronautical Navigation Office.  The ideal candidate has a familiarity with and a baseline understanding of software development concepts, developing coding skills using different tools, and ambition towards future projects in support of the mission.    Responsibilities: The applicant must possess competence with Python and should have working knowledge JavaScript/TypeScript.  Other duties include working with Docker, AWS Cloud, and familiarity with JSON APIs. This role includes creation and documentation of new and existing functionality within software version control repositories (GitLab) and utilizing DevOps principals and tools to deliver new features within an Agile construct. Participate in program Agile software development initiatives (standup, planning, Increment planning) to support innovation and enhancement of custom applications through iteration/functionality testing. Primary responsibilities will involve developing configurations and features for processing Safety of Navigation (SoN) data through an Optical Character Recognition (OCR), Machine Learning (ML) application. This role includes API development and database integration for interaction with React frameworks, using various open-source packages for visualization and data filtering and code modifications that shall apply best practices in unit and build testing. Participate and collaborate with team members to assess tickets to ensure proper testing and delivery of functionality per User Story Acceptance Criteria Core Qualifications: * Minimum 1 year of experience with Python. * Experience with modern JavaScript development framework. * Experience with unit testing, continuous integration tools, and Gitlab version control * Proactive self-starter demonstrates a positive, willing attitude and excellent oral and written communication skills. * Experience in either software development projects or software integration projects in a service-oriented environment (Cloud, SOA, Web-Services) or virtualization environment. * Requires BS degree and 2+ years of prior relevant experience or Masters with less than 2 years of prior relevant experience; OR 4 years of related experience. * Organizational Skills: Can plan and prioritize work. Follow tasks to their logical conclusion and make sure that everything has been done to the right standard. Good attention to detail. * Communications: Ability to communicate clearly and efficiently with team members and clients, verbally and in writing. Able to present ideas in a variety of ways depending upon audience and context. Preferred Qualifications: * At least 1 year of experience with Optical Character Recognition (OCR) and/or Computer Vision (CV) Technologies (AWS Textract, Tesseract, OpenCV) * At least 1 year of experience with DoD Aeronautical Datasets * At least 2 years of experience with AWS cloud formation templates and/or AWS CDK. * Experience with 2D data (HTML Canvas, OpenLayers, Leaflet, GeoJSON, Godot) * AWS Solutions or DevOps certification * Team Collaboration tools (Jira, Confluence) * Ability to obtain TS/SCI with Polygraph

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