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Senior Full-Stack Engineer - Mentor & Build Scalable Systems

Job in Seattle, King County, Washington, 98127, USA
Listing for: GEICO
Full Time position
Listed on 2026-07-19
Job specializations:
  • Software Development
    Full Stack Developer, Backend Developer, Cloud Engineer - Software, Software Engineer
Salary/Wage Range or Industry Benchmark: 100000 - 215000 USD Yearly USD 100000.00 215000.00 YEAR
Job Description & How to Apply Below

Why Join GEICO?

At GEICO, we offer a rewarding career where your ambitions are met with endless possibilities.

Why Join GEICO?

At GEICO, we offer a rewarding career where your ambitions are met with endless possibilities.

Every day we honor our iconic brand by offering quality coverage to millions of customers and being there when they need us most. We thrive on relentless innovation to exceed our customers' expectations while making a real impact on local communities nationwide.

Founded in 1936, GEICO is a member of the Berkshire Hathaway family of companies and one of the largest auto insurers in the United States. When you join our company, we want you to feel valued, supported, and proud to work here. That's why we offer the GEICO Pledge:
Great Company, Great Culture, Great Rewards, and Great Careers.

GEICO is seeking an experienced Engineer with a passion for building high-performance, low maintenance, zero-downtime platforms, and applications. You will help drive our insurance business transformation as we transition from a traditional IT model to a tech organization with engineering excellence as its mission, while co-creating the culture of psychological safety and continuous improvement

Position Description

As a Senior Full-Stack Engineer, you will be a key member of the engineering team, collaborating across the organization to design and deliver scalable, high-performance solutions to complex problems. You will play a critical role in driving innovation, leveraging automation, and ensuring efficient data management. In a fast-paced, dynamic environment, you will plan, prioritize, and execute large-scale projects while mentoring junior engineers and contributing to the continuous improvement of engineering practices

Position Responsibilities

As a Senior Engineer, you will:

  • Design and Develop Systems:
    Architect, develop, and maintain scalable, resilient distributed systems.
  • Define Product Requirements:
    Collaborate with stakeholders to define product requirements and deliver optimal solutions.
  • Collaborate Across Teams:
    Work with cross-functional teams throughout the software development lifecycle to ensure seamless integration and delivery.
  • Lead and Mentor:
    Conduct design sessions, code reviews, and mentor junior engineers to elevate engineering quality and share best practices.
  • Develop Reusable Components:
    Create reusable application components and patterns to improve efficiency and scalability.
  • Full-Stack Development:
    Design, develop, and maintain scalable full-stack applications, including front-end features using ReactJS and its ecosystem (e.g., Redux, Hooks), backend services with .NET or Java frameworks, and efficient data management using SQL and No

    SQL databases.
  • API and Microservices:
    Develop and integrate RESTful APIs and microservices for seamless communication between systems.
  • Dev Ops Practices:
    Utilize CI/CD pipelines, containerization (Docker), and orchestration (Kubernetes) to streamline development and deployment.
  • Documentation:
    Publish and maintain documentation for design references, workflows, and runbooks.
  • System Support:
    Provide support for critical systems, including 24x7 on-call support when necessary.
Experience
  • Professional software development experience in large-scale enterprise environments.
  • Strong front-end development skills, including HTML5, CSS3, JavaScript (ES6+), and ReactJS with Redux or Hooks.
  • Experience building backend services using Java, ASP.NET Core, Spring Boot, or similar frameworks.
  • Proficiency with SQL and No

    SQL databases, including working with structured and nested data formats such as JSON, XML, and YAML.
  • Experience designing, architecting, and maintaining scalable distributed systems and full-stack applications.
  • Familiarity with cloud platforms such as Azure, AWS, or GCP.
  • Knowledge of responsive and adaptive design principles.
  • Experience developing and integrating RESTful APIs and microservices.
  • Experience with open-source frameworks, tools, and modern engineering practices.
Qualifications

  • 5+ years of professional software development experience in large-scale enterprise environments.
  • 4+ years of experience with backend technologies such as .NET, Java, ASP.NET Core,…
Position Requirements
10+ Years work experience
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