Salary : $118,788.80 - $144,539.20 Annually
Location : Service Center, Administration, Issaquah, WA
Job Type: Full-Time Exempt
Job Number:
Department: Information Technology Services
Division: Business Applications
Opening Date: 08/06/2026
Closing Date: 8/13/2026 11:59 PM Pacific
Union Represented: Yes

General Position Summary

JOB NUMBER: 2026-00166
The King County Library System is seeking a new Software Development Engineer to join their team. The Software Development Engineer designs and develops features, tools and applications used for enhancing King County Library System (KCLS) capabilities.
In this role, you will have the opportunity to:

• Create business and technical requirements
• Estimate projects/tasks, creates prototypes
• Develop application and integration software and features
• Test software and generates supporting documentation

This is an ideal role for an experienced developer with experience in object-oriented design and development, and a commitment to the .
This position collaborates with third-party software development, database support and open source partners to develop technically appropriate solutions. The developer will also work closely with the Quality Assurance Analyst to develop and test/fix/implement said solutions.

General Position Summary

The Software Development Engineer is responsible for designing and developing features, tools, and applications to enhance KCLS software capabilities. This position participates in the full software solution development cycle from inception to completion, ensuring that solutions meet all KCLS business needs and requirements. This role is the principal consultant for team members and vendors needing assistance and support with technical design, development, testing and the implementation of new software programs.
Required: Applicants must attach a current resume and cover letter which addresses relevant work experience, education, and training as it relates to this position.

Examples of Duties

Essential Duties:
The items listed in this section are the key duties and responsibilities for this job and do not represent an exhaustive list. Our organization is dynamic and therefore duties may change based on business necessity; however, any new duties will remain within the scope of the job.

• Researches, designs, implements, tests, documents, and delivers software applications, tools, systems, and services.
• Maintains and manages all software applications, tools, and systems after implementation.
• Analyzes, consults and advises on existing, alternative, and emerging technology products and solutions regarding the feasibility, potential standardization, and financial impact to the organization.
• Leads system improvement development life cycle (SDLC) processes, including continuous integration and delivery, automated testing, and deployment.
• Ensures compliance with KCLS policies, procedures, and standards.
• Technical lead in establishing standards, methods and specifications for the development, improvement, and maintenance of KCLS's software policies, procedures, applications, tools, systems, and services. Analyzes user requirements for system features and functionality.
• Defines and maintains software requirements and procedures documentation for the effective design, installation, configuration, operations, and management of KCLS software applications, tools, systems, and services.
• Implements, follows, and measures performance using industry-standard software development methodologies and best practices.
• Conducts training sessions and provides mentorship to junior developers.
• Coordinates and monitors vendor relationships and performance on outsourced projects.
• Works collaboratively as a team member with third-party software development teams, following Agile methodologies to deliver large-scale releases.
• Works independently as an individual contributor on smaller, less complex solutions.
• Collaborates with and contributes to open-source communities where appropriate to leverage existing code libraries and optimize KCLS's utilization of community code.
• Develops statistical tools and measurement criteria as directed by the Business Applications Manager.

Secondary Duties:

• Contributes to strategic planning as directed by the Business Applications Manager.
• Assists with annual budget preparation by providing estimates for needs and resources.
• Creates and manages Linux virtual machines for development, testing and production.
• Serves as liaison and facilitator between assigned business units, consultants, customers, and management to assist in addressing and resolving issues.
• Prepares and maintains technical documentation.
• Performs other related duties as assigned.

Core Competencies
Organizational Competencies:
Valuing Diversity

Manages relationships with all kinds and classes of people inclusively and equitably; respects, values, and encourages the unique dimension each employee adds to the organization and each member of the community brings to the whole. Seeks opportunities to learn about differences.
Customer Focus

Primarily focused on customer needs, able to deliver high quality, value added services. Constantly strives to find new ways to increase customer satisfaction and understanding, foster equitable services, and forge meaningful connections.
Ethics, Values and Judgement

Exercises best judgment, trustworthiness, and professional standards of conduct; consistently demonstrates organization's values, moral principles, and accountability through behavior, character, and action. Defends intellectual freedom and confidentiality.
Professional and Technical Knowledge

Demonstrates proficiency in professional and technical skills and/or knowledge in position-related areas; purposely keeps up with current developments and trends in areas of expertise, in order to better foster personal success and connections for others.
Job Specific Competencies
Communicates Effectively

Conveys ideas/information in a way that is clear, engaging, and suitable to the audience. Main point of their message is apparent. Listens more than they speak, responds appropriately. Seeks influence.
Vision and Strategic Thinking

Supports, promotes, and ensures alignment with the organization's vision, mission, and values; holds big picture view while setting priorities, often uses breakthrough strategies to find the way forward.
Work Quality

Inspires and strives for excellence in all aspects of work including setting high standards of performance for self and others; ensures that results are complete and accurate; exhibits attention to detail.
Accountability

Holds self, direct reports, and others accountable for achieving intended outcomes; follows up and monitors progress to ensure that things stay on track; models organizational values and norms.
Desired Minimum Qualification

Education/Experience:
The items listed below are the minimum requirements for the job and are relevant to this position. The organization values both work experience and education and realizes that individuals take different paths to acquire knowledge.

• Bachelor's degree from an accredited college or university in computer science, information technology or software engineering.
• Five (5) years of experience in software design or systems analysis.
• One (1) year Experience with Evergreen, or skill with both agile and waterfall methodologies and use of source control management tools, preferred.
• Any equivalent combination of education and experience that provides the knowledge, skills, and abilities to perform the duties and responsibilities of the classification will be considered.

Knowledge and Skills
List the minimum knowledge and skills needed to perform the essential duties of the job. Preferred knowledge and skills may be listed as well. Indicate which are preferred.

• Code development with object-oriented design and development.
• Demonstrated proficiency with modern web development technologies such as Typescript, Angular, Bootstrap CSS, Perl and Linux,
• Experience with and SQL, specifically PostgreSQL.
• System performance evaluation and troubleshooting.
• Works effectively with diverse populations and a wide and varied customer base.
• Listening and communications skills with diverse populations and team members.
• Presentation and public speaking with groups of all sizes.
• Makes independent decisions using critical thinking.
• Responds to requests in a proactive manner.
• Manages work in an environment with many interruptions.
• Works well under pressure from deadlines or changing priorities.

Professional Licenses and Certifications
Items in this section are applicable to the job and can be required or preferred. Indicate which are preferred.

• None.

Physical Demands & Work Environment

Physical Demands:

• While performing the duties of this job the employee will: Constantly sits and seldom walks and stands.
• Constantly use hands/fingers for frequent keyboarding which may be repetitive up to occasional.

• Extensive PC monitor work is required.

• Frequently will reach up to chest level with hands and arms.
• Occasionally lift to 10 pounds and seldom up to 35 pounds.
• Seldom push/pull carts using light force.

Work Environment:

• Work is performed in a typical office environment.
• Incumbent may be permitted hybrid telework schedule upon request.

General Benefits Summary
Paid Time off
It is the policy of KCLS to grant to all part-time and full-time employees:

• Annual Leave (Vacation).
• Sick Leave
• Holidays - KCLS celebrates twelve (12) holidays each year and one (1) floating holiday. Part-time employees are eligible for holiday pay if they are scheduled to work on the day the holiday falls on.

Medical/Dental Insurance Benefits
Our health insurance plans with Kaiser/Premera/Delta Dental are offered at low premium rates to all employees working 20 or more hours per week. Employees may also purchase benefits for dependents and domestic partners.

Retirement - Public Employee Retirement System (PERS)
Employees working 20 hours per week or more are automatically enrolled in the Washington State Public Employees' Retirement System (PERS) program. Both KCLS and the employee contribute toward PERS retirement benefits.

Flexible and Dependent Care Spending Accounts and Health Saving Account
Employees working 20 hours per week or more can set aside a portion of their salary on a pre-tax basis to pay for family medical and dependent care needs. KCLS provides an annual employer contribution to Health Saving Account when the employee is enrolled in a high deductible health plan.

Life and Accidental Death & Disability, Long Term Disability Insurance
All the employees working 20 hours per week or more qualify for the group term life and AD& D insurance benefits equal to one times their annual salary. Employees working 40 hours per week receive long-term disability insurance.

Optional/Voluntary Benefits
Employees working 20 hours per week or more are eligible to participate in the following voluntary benefits:

• Supplemental Term Life and AD&D Insurance
• Personal Accident Insurance
• Critic