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64 System One Senior Software Engineer Jobs Hiring Near You

DigitalOcean

Senior Software Engineer

Seattle, WA · Hybrid

$191K - $239K/yr

We want people who are passionate about taking complex systems and delivering simple, scalable, and ... Proficiency in one or more of: Go , Python , TypeScript , GraphQL , Bash * Extensive experience ...

DLS Engineering

Senior Software Engineer

Saint Louis, MO · On-site

$118K - $126K/yr

Senior Software Engineer at DLS Engineering (on-site) DLS Engineering is seeking a Senior Software ... A background in geospatial systems, imagery acquisition, and geometry is a significant plus. Why ...

Source Code

Senior Software Engineer

Toronto, ON

Senior Software Engineer Toronto, ON Our client, a leading financial services organization, is ... Drive continual improvement to the efficiency and flexibility of the systems while keeping a high ...

Caselle

Senior Software Engineer

Provo, UT · On-site

$120K - $140K/yr

Senior Software Engineer Are you a Software Engineer who's ready to take your career to the next ... efficient systems that are as intuitive as they are powerful. Your strong understanding of ...

Lorven Technologies

Sr. Software Engineer

Irving, TX · On-site

$117K - $155K/yr

Job Title: Sr. Software Engineer Location: Irving, TX * Bachelor's degree in related field ... Proven experience building and integrating distributed systems and APIs * Hands-on experience with ...

Organ Recovery Systems

Sr. Software Engineer

Itasca, IL · On-site

$119K - $157K/yr

At Organ Recovery Systems (ORS) , the software you design and develop supports medical devices used ... You'll contribute across the entire product lifecycle, not just one phase * You'll join a mission ...

BloKchain Talent

Senior Software Engineer - C++

Chicago, IL · On-site

$150K - $200K/yr

Design and develop trading systems, exchange connectivity solutions, monitoring systems, and tools to integrate core infrastructure services * Work from high-level requirements and gain an intimate ...

System One

Sr. Software Engineer

Strongsville, OH · On-site

$113K - $149K/yr

Responsible for writing programs to maintain and control computer systems software for operating ... one environment to another, copies it down to the structures of the table. Same in both ...

SWITS DIGITAL Private Limited

Senior Software Engineer

$125K - $165K/yr

Senior Software Engineer Location: Remote Key Responsibilities * Work on AI model training ... Ability to analyze, evaluate, and improve code quality and system performance . * Excellent problem ...

TMC Technologies

Senior Software Engineer

King George, VA · On-site

$114K - $150K/yr

... systems engineering, software development, and test & evaluation expertise to the Naval Surface ... Coding / analyzing one or more of the following programming languages to include C++, C, Python ...

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System One Jobs Information

What is it like to work at System One?

System One is a professional services company that values collaboration, innovation, and a client-centric approach, fostering a dynamic and supportive work environment.

The company's team structure is designed to facilitate knowledge sharing and expertise exchange, with a flat organizational hierarchy that encourages open communication and cross-functional collaboration. System One's mission is to deliver high-quality solutions to its clients through a network of experienced professionals and cutting-edge technologies.

Working at System One may appeal to candidates who are looking for a challenging and rewarding career in a fast-paced, client-driven industry, with opportunities for professional growth and development in a collaborative and dynamic work environment.
What other companies are hiring for Senior Software Engineer jobs?
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Infographic showing various Senior Software Engineer job openings at System One in the United States as of June 2026, with employment types broken down into 1% As Needed, 42% Full Time, 1% Part Time, 1% Temporary, 54% Contract, and 1% Nights. Highlights an 83% Physical, and 17% Remote job distribution.
Sr Software Engineer - Java & APIs (Night Shift)

Sr Software Engineer - Java & APIs (Night Shift)

System One Holdings, LLC

Reston, VA • On-site

$79/hr

Full-time, Contractor, Other

Medical, Dental, Vision, Life, Retirement

Posted 7 days ago

Job description

Job Title: Java Developer - Night Shift
Location: Reston, VA
Type: Contract to Hire
Compensation: $79/HR
Work Model: Hybrid - onsite and remote
Overview
Important Requirements (Please Read Before Applying)
  • Night shift role (final schedule assigned after onboarding)
  • Rotating weekend coverage required
  • Onsite interview required
  • 2 to 3 weeks onsite training required

This is a hands on engineering plus production support role supporting high visibility, mission critical systems.
About the Role
We are looking for a Senior Software Engineer with strong Java, API, and production support experience to build, maintain, and support enterprise scale applications used by tens of thousands of users.
This role is ideal for engineers who:
  • Thrive in high impact, fast response environments
  • Enjoy solving complex production issues
  • Can balance development plus operational support
  • Are comfortable working independently during overnight hours

What You Will Do
  • Design, build, and enhance enterprise Java applications and APIs
  • Troubleshoot and resolve critical production issues in real time
  • Develop and execute unit tests and automated test cases
  • Support and improve system performance, reliability, and scalability
  • Work across teams to deliver high availability systems at scale
  • Contribute to architecture decisions and system design
  • Maintain and improve CI CD pipelines, code quality, and deployment processes
  • Mentor junior engineers and contribute to team best practices

What You Bring (Required)
  • 5 or more years of software engineering experience
  • Strong Java development experience (Java JEE, Spring ecosystem)
  • Experience building and supporting REST APIs or web services
  • Production support experience (this is critical)
  • Experience with:
    • Spring Boot, MVC, Integration
    • Hibernate or similar ORM frameworks
    • SQL and database design
    • CI CD tools (Jenkins, Maven, etc.)
  • Front end basics: HTML, JavaScript, CSS
  • Strong troubleshooting and problem solving skills
  • Ability to work independently during overnight shifts

Nice to Have
  • API Management (APIM) experience
  • Experience with Angular or React
  • Knowledge of OAuth2, SSO, or security frameworks
  • Experience with cloud platforms (AWS or Azure)
  • Exposure to Big Data technologies

What Sets You Apart
  • You write clean, efficient, production ready code
  • You stay calm under pressure and can resolve critical issues quickly
  • You are comfortable owning systems end to end
  • You proactively identify improvements and drive them forward

Reality of the Role (No Surprises)
This is not a typical 9 to 5 development role.
You will be:
  • Working overnight shifts
  • Supporting live production systems
  • Handling high priority issues in real time

In return, you will have:
  • High ownership and visibility
  • Opportunity to work on large scale, mission critical systems
  • A team that values strong, reliable engineers
  • An opportunity to convert to a full-time employee of the client, based on eligibility and performance.

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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