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Senior Application Software Engineer Jobs in Mercer Island, WA

Application Software Engineer

Redmond, WA · On-site +1

$145K - $200K/yr

APPLICATION SOFTWARE ENGINEER The application software team is the central nervous system of SpaceX - we create mission critical applications that are used throughout SpaceX to accelerate launch ...

Application Software Engineer

Redmond, WA · On-site

$145K - $200K/yr

APPLICATION SOFTWARE ENGINEER The application software team is the central nervous system of SpaceX - we create mission critical applications that are used throughout SpaceX to accelerate launch ...

Application Software Engineer

Redmond, WA · On-site

$145K - $200K/yr

APPLICATION SOFTWARE ENGINEER The application software team is the central nervous system of SpaceX - we create mission critical applications that are used throughout SpaceX to accelerate launch ...

... life on Mars. SR. APPLICATION SECURITY ENGINEER (STARLINK) At SpaceX we're leveraging our ... As a Security Software Engineer, you will influence the security of Starlink.com and associated ...

SR. APPLICATION SECURITY ENGINEER At SpaceX we're leveraging our experience in building rockets and ... As a Security Software Engineer, you will influence the security of Starlink.com and associated ...

... Mars. SR. APPLICATION SECURITY ENGINEER At SpaceX we're leveraging our experience in building ... As a Security Software Engineer, you will influence the security of Starlink.com and associated ...

... Mars. SR. APPLICATION SECURITY ENGINEER At SpaceX we're leveraging our experience in building ... As a Security Software Engineer, you will influence the security of Starlink.com and associated ...

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Showing results 1-20

Senior Application Software Engineer information

See Mercer Island, WA salary details

$54

$86

$133

How much do senior application software engineer jobs pay per hour?

As of Aug 24, 2026, the average hourly pay for senior application software engineer in Mercer Island, WA is $86.79, according to ZipRecruiter salary data. Most workers in this role earn between $70.67 and $97.16 per hour, depending on experience, location, and employer.

What does a senior application software engineer do?

A Senior Application Software Engineer is responsible for designing, developing, and maintaining complex software applications. They often lead technical projects, mentor junior engineers, and collaborate with cross-functional teams to deliver high-quality solutions. Their role includes analyzing user needs, writing code, troubleshooting issues, and ensuring software scalability and security. Senior engineers are also involved in architectural decisions and may help define software development standards within their organization.

What are the key skills and qualifications needed to thrive as a senior application software engineer, and why are they important?

To thrive as a Senior Application Software Engineer, you need advanced proficiency in programming languages (such as Java, Python, or C#), software architecture, and a bachelor’s or master’s degree in computer science or a related field. Experience with development frameworks, cloud platforms, version control systems (like Git), and often certifications such as AWS Certified Developer or Microsoft Certified: Azure Developer Associate are highly valued. Strong problem-solving ability, leadership, and effective communication set standout professionals apart in this role. These skills and qualities are crucial for designing robust software solutions, mentoring teams, and ensuring successful project delivery in complex technical environments.

How does a senior application software engineer typically collaborate with cross-functional teams during the development lifecycle?

Senior Application Software Engineers frequently work alongside product managers, UX/UI designers, QA specialists, and other engineers to ensure software solutions meet business objectives and user needs. They often lead technical discussions, clarify requirements, and provide mentorship to junior developers. Effective communication and a proactive approach to problem-solving are crucial, as these engineers serve as a bridge between technical and non-technical stakeholders throughout the development, testing, and deployment phases.

What is the difference between Senior Application Software Engineer vs Software Developer?

AspectSenior Application Software EngineerSoftware Developer
CredentialsBachelor's or higher in CS or related field; experience often 5+ yearsBachelor's in CS or related field; experience varies, often less than 5 years
Work EnvironmentDesigning, developing, and maintaining complex applications; often involved in architecture decisionsWriting, testing, and debugging code; focused on specific features or modules
Industry UsageCommon in tech, finance, healthcare, and enterprise sectorsWidespread across all industries requiring software solutions

Senior Application Software Engineers typically have more experience and responsibilities, including system design and mentorship, compared to Software Developers who focus more on coding and implementation. Both roles require strong programming skills, but the senior role involves broader project oversight and strategic input.

What cities near Mercer Island, WA are hiring for Senior Application Software Engineer jobs?

Cities near Mercer Island, WA with the most Senior Application Software Engineer job openings:

Infographic showing various Senior Application Software Engineer job openings in Mercer Island, WA as of August 2026, with employment types broken down into 76% Full Time, 18% Part Time, and 6% Contract. Highlights an 92% Physical, 2% Hybrid, and 6% Remote job distribution, with an average salary of $180,514 per year, or $86.8 per hour.

Application Software Engineer II - Chassis Tester Software

Blue Origin LLC

Seattle, WA • On-site

$197.53 - $276.54/hr

Other

Medical, Dental, Vision, Life, Retirement, PTO

Posted 13 days ago


Blue Origin rating

8.7

Company rating: 8.7 out of 10

Based on 91 frontline employees who took The Breakroom Quiz

16th of 72 rated aerospace companies


Job description

Sr. Application Software Engineer – Chassis Tester SoftwareSkip to main content#Sr. Application Software Engineer – Chassis Tester Software page is loaded## Sr. Application Software Engineer – Chassis Tester SoftwareApplylocations: Greater Seattle Areatime type: Full timeposted on: Posted Todayjob requisition id: R68226Application close date:Applications will be accepted on an ongoing basis until the requisition is closed.At Blue Origin, we envision millions of people living and working in space for the benefit of Earth. We’re working to develop reusable, safe, and low-cost space vehicles and systems within a culture of safety, collaboration, and inclusion. Join our team of problem solvers as we add new chapters to the history of spaceflight! This role supports the development and operations of New Glenn, a single-configuration, heavy-lift orbital launch vehicle capable of routinely carrying people and payloads to low-Earth orbit, geostationary transfer orbit, cislunar, and beyond. Its first stage is fully reusable, and the vehicle was designed from the beginning to be human-capable.This role supports the development and operations of New Glenn, a single-configuration, heavy-lift orbital launch vehicle capable of routinely carrying people and payloads to low-Earth orbit, geostationary transfer orbit, cislunar, and beyond. Its first stage is fully reusable, and the vehicle was designed from the beginning to be human-capable.New Glenn is Blue Origin's orbital launch vehicle, and all avionics equipment that flies on it must be verified before it leaves the ground. As part of a hardworking team of engineers, you will be a senior technical contributor on the **Chassis Tester Software** team — the engineers who build the software stack that makes that verification possible. You will work on verification systems and be responsible for requirements, design, implementation, integration and testing of various software components and tools critical for the success of New Glenn’s mission. This is not a test automation role in the traditional sense. You will write **Linux instrument drivers**, architect **hardware-in-the-loop test frameworks**, build the **operator-facing tools** that run on the test floor, and own the **automated** **result-checking infrastructure** (Themis) that determines pass/fail for flight-critical hardware. Your software is the last line of defense before hardware ships. At Level 4, you set technical direction, make architectural decisions, and are accountable for the quality and reliability of the entire software stack. **Responsibilities:*** Design and implement production-quality **Linux software drivers** for test instruments — power supplies, DMMs, oscilloscopes, signal generators, DAQ systems — communicating over SCPI, VISA, serial, USB, and Ethernet* Own the full driver lifecycle: characterization, implementation, integration testing, and documentation* Work directly with avionics hardware engineers to understand instrument behavior, define operating envelopes, and validate driver correctness against hardware specs* Architect and extend automated test execution frameworks and **Themis**, the team's result-checking framework* Implement check logic, pass/fail criteria, limit management, and structured report generation for acceptance and qualification test campaigns* Own and evolve the Platform Integration Layer common framework and its platform integrations* Design networking architecture for multi-instrument, multi-UUT test configurations* Build and maintain deployment automation (Ansible-based role architecture) for test system configuration management* Drive technical debt reduction: decouple legacy behaviors, standardize interfaces, and maintain a clean common codebase* Design and implement operator-facing applications — GUI tools and/or CLI interfaces — that allow test engineers and technicians to configure, execute, monitor, and review avionics test campaigns* Prioritize usability, reliability, and clear feedback for non-software users operating in a fast-paced test environment **Required Qualifications** * B.S. in Computer Science, Electrical Engineering, Computer Engineering, or related field* **8+ years** of professional software engineering experience* Expert-level **Python** — you write clean, testable, maintainable Python and hold others to the same standard* Proven experience developing software on **Linux** — process management, filesystem, systemd, shell scripting* Experience with the networking stack — socket programming, UDP/TCP telemetry and command transport, packet capture and parsing, network reliability handling and configuration* Hands-on experience writing **hardware interface software** — instrument drivers, SCPI/VISA communication, or equivalent embedded/hardware-adjacent development* Experience with **automated test frameworks** (pytest or equivalent) including fixture design, parametrization, and structured reporting* Strong **Git** workflow discipline — branching strategy, code review, CI integration* Demonstrated ability to debug across the hardware-software boundary — you are comfortable with a scope or DMM when the driver isn't behaving* Demonstrated track record of **owning a software system end-to-end** — from architecture through deployment and long-term maintenance. Established coding standards, review practices, and architectural patterns for the team* Experience making and defending **architectural decisions** with cross-functional impact* Proven ability to **lead technical work** across a team — setting direction, unblocking others, and driving delivery without being a manager* Experience in **aerospace, defense, or other safety-critical domains** where software correctness has real-world consequences**Preferred Qualifications** * Experience with **Ansible** or similar infrastructure-as-code / configuration management tools* Experience building **GUI applications** in Python (PyQt5/6, PySide, wxPython) or web-based operator interfaces (FastAPI, React, or similar)* Experience with **C++** in an embedded or hardware-interface context* Familiarity with **avionics test environments** — EMI, TVAC, pyrotechnic systems, harness verification, automated test equipment checkout* Experience designing **networked test architectures** — Ethernet instrument switching, NPC configuration, multi-node test topologies* Knowledge of **acceptance and qualification test processes** in an aerospace hardware development lifecycle* Familiarity with **DOORS, Jama**, or equivalent aerospace data and requirements management systems* Experience with **Docker** or containerized test environments### Base Pay Range for:WA applicants is $197,529.00 - $276,539.55**Other site ranges may differ****Culture Statement**Don’t meet all desired requirements? Studies have shown that some people are less likely to apply to jobs unless they meet every single desired qualification. At Blue Origin, we are dedicated to building an authentic workplace, so if you’re excited about this role but your past experience doesn’t align perfectly with every desired qualification in the job description, we encourage you to apply anyway. You may be just the right candidate for this or other roles.**Export Control Regulations**Applicants for employment at Blue Origin must be a U.S. citizen or national, U.S. permanent resident (i.e. current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum.**Background Check*** Required for all positions: Blue’s Standard Background Check* Required for Certain Job Profiles: Defense Biometric Identification System (DBIDS) background check if at any time the role requires one to be on a military installation* Required for Certain Job Profiles: Drivers who operate Commercial Motor Vehicles with a Gross Vehicle Weight (GVW), Gross Vehicle Weight Rating (GVWR) or combination of power unit and trailer that meets or exceeds 10,001 lbs. and/or transports placardable amounts of hazardous materials by ground in any vehicle on a public road while in commerce, may be subject to additional Federal Motor Carrier Safety Regulations including: Driver Qualification Files, Medical Certification (obtained before onboarding), Road Test, Hours of Service, Drug and Alcohol Testing (CDL drivers only), vehicle inspection requirements, CDL requirements (if applicable) and hazardous materials transportation/shipping training.* Required for certain Job Profiles: Ability to obtain and maintain Merchant Mariner Credential, which includes pre-employment and random drug testing as well as DOT physical**Benefits*** Benefits include: Medical, dental, vision, basic and supplemental life insurance, paid parental leave, short and long-term disability, 401(k) with a company match of up to 5%, and an Education Support Program.* Stock Options for all regular employees (working at least 20 hours/week)* Paid Time Off: Up to four (4) weeks per year based on weekly scheduled hours, and up to 14 company-paid holidays.* Dependent on role type and job level, employees may be eligible for benefits and bonuses based on the company's intent to reward individual contributions and enable them to share in the company's results, or other factors at the company's sole discretion. Bonus amounts and eligibility are not guaranteed and subject to change and cancellation. Please check with your recruiter for more details.**Equal Employment Opportunity**Blue Origin is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified and dedicated work force. Blue Origin hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, sex, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Blue Origin will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws, including the Washington Fair Chance Act, the California Fair Chance Act, the Los Angeles Fair Chance in Hiring Ordinance, and other applicable laws. For more information on “Know Your Rights,” please see here.**Affirmative Action and Disability Accommodation**Applicants wishing to receive information on Blue Origin’s Affirmative Action Plans, or applicants requiring a reasonable accommodation in order to participate in the application and/or interview process, please contact us at EEOCompliance@blueorigin.com. Please note this is a publicly managed inbox. Please do not include any personal medical information in your request. #J-18808-Ljbffr

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About Blue Origin

Sourced by ZipRecruiter

Blue Origin is a private aerospace manufacturing and suborbital spaceflight services company based in Kent, Washington, USA. Established in 2000 by Amazon founder Jeff Bezos, the company operates in the cutting-edge aerospace industry aiming to build a future where millions of people can live and work in space. They develop a variety of technologies, with a focus on reusable rocket systems which significantly reduce the cost of space travel. Blue Origin's core mission is to make this vision come to life by incrementally building on its successes with an ultimate vision of dramatic cost reduction and increased reliance on reusable spacecraft.

Industry

Space research administration

Company size

1,001 - 5,000 Employees

Headquarters location

Kent, WA, US

Year founded

2000