Senior Back End Software Developer

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Senior Back End Software Developer
Location: Colorado Springs, Colorado
Work Model: Onsite
Clearance: Eligible – will be processed for Top Secret eventually
If interested reach out directly to kimberly.spicer@systemone.com or text 301-252-8762
Responsibilities

Develop and maintain server-side logic by writing code that powers the application's functionality, handles user requests, and manages data.
Create APIs that allow different parts of the application, or different applications, to communicate with each other.
Design database schemas, write queries, and ensure data integrity and security.
Ensure the application can handle a growing number of users and data efficiently.
Work closely with front-end developers to integrate the back-end functionality with the user interface.
Implement security measures to protect sensitive data and prevent unauthorized access.
Participate in code reviews, debug developed code, and stay current with software development trends.
Ensure all changes or adaptations are thoroughly and meticulously reviewed, tested, and verified to eliminate application downtime or degradation.
Collaborate with cross-functional teams, develop reusable code components, and ensure application accessibility.
Actively participate in Integrated Product Teams (IPT’s) and other engineering working groups to review, assess, and mature engineering artifacts such as CONOPs, system architecture, system interfaces, data models, and ICDs.
Provide meeting coordination, technical expertise, and software development to assist customer decision-makers.

Requirements

B.S. in Computer Science, Computer Engineering, or equivalent STEM-based degree.
7+ years of experience as a Back-End Software Application Developer with a portfolio, and proficiency in modern object-oriented programming languages such as Python, Java, C++, Node.js, or Ruby.
Experience with both SQL (e.g., MySQL, PostgreSQL) and NoSQL (e.g., MongoDB) databases.
Familiarity with back-end frameworks like Django, Flask, Spring, or Express.js.
Experience with cloud platforms like AWS, Azure, or Google Cloud.
Experience with efficient data storage and retrieval.
Strong, demonstrable understanding of modern design and coding principles and practices.
Familiarity with version control systems (e.g., Git).
Knowledge of software performance optimization.
Strong problem-solving skills.
Excellent communication and teamwork abilities.
Nice to have: Advanced degree in Computer Science or related field. Experience with testing frameworks. Knowledge of security practices. Active TS/SCI. Space domain experience.

System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.
System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.
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Ref: #851-Rockville-S1

Type: Direct-Hire

Experience: 0

Category: Information Technology

Contractor Work Model: Onsite

Brand: System One

Shift: On-Site

Compensation Range: 130000.00 - 175000.00

Job ID: 350126

Date Posted: 05/01/2026

Shortcut: https://jobs.systemone.com/wjvwmz