Senior Engineer .NET
Confirmed on the employer's own hiring board on Sep 25, 2026. First seen by Alion on Sep 24, 2026. GEICO scores B on the Alion truth index.
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.
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 NoSQL databases.
- API and Microservices: Develop and integrate RESTful APIs and microservices for seamless communication between systems.
- DevOps 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 NoSQL 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, or Spring Boot.
- 3+ years of experience with ReactJS.
- Strong proficiency in front-end technologies, including HTML5, CSS3, JavaScript (ES6+), ReactJS, Redux, and Hooks.
- Experience with SQL and NoSQL databases, cloud platforms such as Azure, AWS, or GCP, and structured data formats such as JSON, XML, and YAML.
- Knowledge of responsive and adaptive design principles.
- Familiarity with Python, Golang, PowerShell, or similar programming and scripting languages is preferred.
- Bachelor’s or Master’s degree in Computer Science, Information Systems, or equivalent education/work experience.
The GEICO Pledge:
Great Company: Protecting customers through life’s twists and turns with innovation and integrity.
Great Careers: Personalized development programs, mentorship, and certification assistance.
Great Culture: Inclusive and collaborative culture rooted in shared success.
Great Rewards: Competitive pay, benefits, and flexibility to support your well-being and future.
The equal employment opportunity policy of the GEICO Companies provides for a fair and equal employment opportunity for all associates and job applicants regardless of race, color, religious creed, national origin, ancestry, age, gender, pregnancy, sexual orientation, gender identity, marital status, familial status, disability or genetic information, in compliance with applicable federal, state and local law. GEICO hires and promotes individuals solely on the basis of their qualifications for the job to be filled.
GEICO reasonably accommodates qualified individuals with disabilities to enable them to receive equal employment opportunity and/or perform the essential functions of the job, unless the accommodation would impose an undue hardship to the Company. This applies to all applicants and associates. GEICO also provides a work environment in which each associate is able to be productive and work to the best of their ability. We do not condone or tolerate an atmosphere of intimidation or harassment. We expect and require the cooperation of all associates in maintaining an atmosphere free from discrimination and harassment with mutual respect by and for all associates and applicants.