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Java Software Engineer Contract Jobs in Kent, WA

GenScript/ProBio

Senior Java Engineer

Redmond, WA · On-site

$140K - $170K/yr

Architect and develop mission-critical Java software for next-generation automated instruments ... Requires Bachelor's degree in Computer Science, Computer Science & Engineering, Software ...

GenScript/ProBio

Senior Java Engineer

Redmond, WA · On-site

$140K - $170K/yr

Architect and develop mission-critical Java software for next-generation automated instruments ... Requires Bachelor's degree in Computer Science, Computer Science & Engineering, Software ...

TriOptus LLC

Java Engineer

Seattle, WA · On-site

$59 - $80.75/hr

Our client is seeking a Sr Level Java engineer for engineering and delivery microservices and API ... Software Engineer Background Check : No Drug Screen : No

TriOptus LLC

Java Engineer

Seattle, WA · On-site

$59 - $80.75/hr

Our client is seeking a Sr Level Java engineer for engineering and delivery microservices and API ... Software Engineer Background Check : No Drug Screen : No

Trigyn Technologies

Software Developer (OO, Java)

Bellevue, WA · On-site

$64.50 - $82.50/hr

Software Developer (Java / Web Services) Trigyn's Direct Client is looking for Software Developer for contract assignment in Bellevue, WA. Our client is one of the best companies in the United States ...

Trigyn Technologies

Software Developer (OO, Java)

Bellevue, WA · On-site

$64.50 - $82.50/hr

Software Developer (Java / Web Services) Trigyn's Direct Client is looking for Software Developer for contract assignment in Bellevue, WA. Our client is one of the best companies in the United States ...

Procom Consultants Group

Senior Java Developer

Bellevue, WA

$64.50 - $82.50/hr

... Contract Staffing (Staff Augmentation) Permanent Placement (Staff Augmentation) ICAP (Contractor ... Modify or upgrade applications to maintain software functionality. Identify and resolve programming ...

Comtech, LLC

Java SDET

Seattle, WA

JAVA SDET Location - Seattle, WA US/GC only ( As we are not sponsoring Visa's ) Description Experience with building automated test in continuous integration environment Familiar with one or more ...

Comtech, LLC

Java SDET

Seattle, WA

For more information please visit www.comtechllc.com SDET / Software Development Engineer in Test (Java/AngularJS/JavaScript frameworks) Location - Seattle, WA / In-Person Required. Duration - 12 ...

Procom Consultants Group

Senior Java Developer

Seattle, WA

$65.25 - $83/hr

... Contract Staffing (Staff Augmentation) Permanent Placement (Staff Augmentation) ICAP (Contractor Payroll) Flextrack (Vendor Management System) Senior Java Developer On behalf of our client, Procom ...

Geico

Senior Staff Engineer - Java

Seattle, WA

$120K - $260K/yr

Develop and execute technical software development strategy for a variety of domains * Accountable ... Utilize programming languages like Java or other object-oriented languages, SQL, and NoSQL ...

Geico

Senior Staff Engineer - Java (HYBRID)

Seattle, WA

$142.30K - $187.20K/yr

Deliver High-Quality services and software for a variety of domains * Accountable for the quality, usability, and performance of the solutions * Utilize programming languages like Java, C#, or other ...

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Java Software Engineer Contract information

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How much do java software engineer contract jobs pay per hour?

As of May 30, 2026, the average hourly pay for java software engineer contract in Kent, WA is $68.21, according to ZipRecruiter salary data. Most workers in this role earn between $56.15 and $77.07 per hour, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as a Java Software Engineer Contractor, and why are they important?

To thrive as a Java Software Engineer Contractor, you need strong proficiency in Java programming, experience with software development lifecycles, and typically a bachelor's degree in computer science or a related field. Familiarity with tools such as Spring Framework, Git, Maven, and cloud platforms, as well as knowledge of unit testing frameworks, is highly valued. Excellent problem-solving abilities, adaptability, and clear communication help you stand out, especially when collaborating remotely or integrating with diverse teams. These skills and qualities are crucial for delivering reliable, scalable solutions on time and ensuring smooth coordination in dynamic project environments.

What are some common challenges faced by Java Software Engineers on contract assignments, and how can they be managed?

Contract Java Software Engineers often face challenges such as quickly adapting to new codebases, understanding project requirements with limited onboarding time, and integrating smoothly with established teams. To manage these challenges, it's important to proactively communicate with team members, ask clarifying questions early, and make use of available documentation. Contract roles also require strong time management and self-motivation, as deliverables and expectations may be clearly defined but support can be less hands-on compared to permanent positions.

What is a Java Software Engineer Contract?

A Java Software Engineer Contract is a temporary or fixed-term role where a software engineer is hired to develop, test, and maintain software applications using the Java programming language. Contractors typically work on specific projects or for a set period, rather than as permanent employees. These roles often require expertise in Java frameworks, object-oriented programming, and collaboration with other developers or teams. Contract positions can offer flexibility, competitive pay, and opportunities to work on diverse projects.

What is the difference between Java Software Engineer Contract vs Java Software Engineer?

AspectJava Software Engineer ContractJava Software Engineer
Employment TypeTemporary/Project-basedFull-time/permanent
DurationFixed-termIndefinite
Work EnvironmentClient sites, consulting firms, or remoteCompany offices or remote
CertificationsTypically no specific certifications requiredOften prefers Java certifications or related credentials

Java Software Engineer Contract roles are temporary positions focused on specific projects, offering flexibility but less job security. Full-time Java Software Engineers work permanently within organizations, with benefits and career growth opportunities. Both roles require strong Java skills, but contracts may have less emphasis on certifications. Choose based on your career goals and desired work environment.

What are the most commonly searched types of Java Software Engineer jobs in Kent, WA? The most popular types of Java Software Engineer jobs in Kent, WA are:
What are popular job titles related to Java Software Engineer Contract jobs in Kent, WA? For Java Software Engineer Contract jobs in Kent, WA, the most frequently searched job titles are:
What job categories do people searching Java Software Engineer Contract jobs in Kent, WA look for? The top searched job categories for Java Software Engineer Contract jobs in Kent, WA are:
Java Software Engineer Contract jobs near you

Senior Java Engineer

GenScript/ProBio

Redmond, WA • On-site

$140K - $170K/yr

Full-time

Medical, Dental, Vision, Retirement, PTO

Posted 13 days ago

Job description

About GenScriptGenScript Biotech Corporation (Stock Code: 1548.HK) is a global biotechnology group. Founded in 2002, GenScript has an established global presence across North America, Europe, the Greater China, and Asia Pacific. GenScript's businesses encompass four major categories based on its leading gene synthesis technology, including operation as a Life Science CRO, enzyme and synthetic biology products, biologics development and manufacturing, and cell therapy.GenScript is committed to striving towards its vision of being the most reliable biotech company in the world to make humans and nature healthier through biotechnology.

Description:

Architect and develop mission-critical Java software for next-generation automated instruments, enabling precise control of microcontrollers, valves, sensors, and pressure regulators. Own the full-stack software infrastructure, from low-level hardware communication (USB/SPI/serial) and embedded firmware integration to GUI design, data pipelines, and database management, ensuring reliability for end-user scientists.

Responsibilities:

  1. Java-Centric Development:
  2. Lead high-level Java development for instrument control, including multi-threaded applications, GUI frameworks (JavaFX/Swing), and hardware abstraction layers.
    • Modernize legacy Java codebases while maintaining backward compatibility with embedded systems (custom controller PCB based on industry standard microcontroller).
  3. Hardware Integration:
    • Interface with microcontrollers, sensors, and actuators via protocols (SPI/I2C/serial) and real-time messaging systems.
    • Debug and optimize low-level communication between software and hardware components.
  4. Database & Systems Management:
    • Design and maintain relational databases for instrument metadata, experiment logs, and process analytics.
    • Implement data analysis pipelines (Python/Java) for real-time monitoring, post-processing analysis and process optimization.
  5. Technical Leadership:
    • Act as SME for software architecture: document APIs, enforce good design practices, and mentor junior engineers if needed.
    • Drive CI/CD pipelines, version control (Mercurial/Git), and automated testing frameworks.

Onsite Requirement: This is a fully onsite role due to the hands-on nature of instrument control, hardware integration, and close collaboration with engineering and scientific teams.

Qualifications:

Requires Bachelor's degree in Computer Science, Computer Science & Engineering, Software Engineering, Electrical Engineering or a related Engineering field.

Experience: 6–8 years in Java development for instrumentation/robotics/embedded systems (or equivalent).

Technical Skills:

Java Expertise: Core Java, multi-threading, JavaFX/Swing, Maven, NetBeans.

Hardware Protocols: USB, Serial, SPI, I2C (hands-on debugging).

Bonus: Python scripting, Qt/GUI frameworks, embedded firmware (C/C++).

Soft Skills & Culture Fit:

"Product mindset": Balance technical rigor with end-user needs (scientists' workflows).

Communicate complex ideas clearly to both engineers and non-technical stakeholders.

Autonomy: Self-driven in ambiguous, R&D-paced environments.

Benefit:

  • Medical Insurance/ Vision Insurance/ Dental Insurance
  • 401(k) & Retirement Savings Plan (RSP)
  • Short Term Disability Insurance
  • New Child Leave
  • Paid Time Off
  • Paid Company Holidays per year
  • Paid Sick Days (earned based on hours worked)
  • Compassionate Leave
  • Jury Duty Leave
  • Float day
  • Personal days

Perks:

  • Free colleague meals during shift
  • Onsite massages Charis
  • Onsite gyms

Compensation:
Salary range: $140,000 – $170,000 total compensation, including bonus, depending on experience and qualifications.

GenScript USA Inc/ProBio Inc. is a proud equal opportunity/affirmative action employer committed to attracting, retaining, and maximizing the performance of a diverse and inclusive workforce. It is the Company's policy to ensure equal employment opportunity without discrimination or harassment based on race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity or expression, age, disability, national origin, marital or domestic/civil partnership status, genetic information, citizenship status, uniformed service member or veteran status, or any other characteristic protected by law.

GenScript USA Inc./ProBio Inc. maintains a drug-free workplace.

Please note: Genscript USA Inc./ProBio Inc. will only contact candidates through verified application sources. GenScript/Probio does not request personal information from candidates through individual email or any other platform.