Sr. Software Engineer, Fullstack

Remote or Hybrid

About the Role

At Firstup in the SaaS Technology Company space.

Develop, enhance, and maintain scalable .NET and Angular web applications. Design RESTful APIs, optimize performance, address security and scalability, troubleshoot production issues, and collaborate with cross-functional Agile teams. Mentor junior developers, conduct code reviews, enforce engineering standards, and use AI-assisted development tools and prompt engineering for coding, testing, debugging, refactoring, and documentation.

Want to learn more about what it's like to work at Firstup? View our full profile.

Requirements

8+ years of hands-on experience in .NET development (C#, ASP.NET, .NET Core / .NET 6+).
Experience with Angular (version 8 or above).
Proficiency in front-end technologies (HTML5, CSS3, JavaScript/TypeScript).
Experience in building and consuming Web APIs.
Strong knowledge of SQL Server and database design.
Experience working with cloud platforms (Azure preferred).
Strong understanding of object-oriented design principles, design patterns, and clean architecture.
Experience using AI-powered development tools (e.g., Claude, Cursor AI, GitHub Copilot, or similar) in day-to-day development workflows.
Ability to craft effective prompts for code generation, optimization, testing, and problem-solving (Prompt Engineering for software development).
Excellent communication and collaboration skills.
Familiarity with microservices architecture.
Knowledge of application security best practices (OWASP, secure coding).
Experience in performance tuning and scalability optimization.
Exposure to AI-enabled development workflows and productivity measurement practices.

Prefer to apply on the company's career site?

View Original Posting

Frequently Asked Questions About Working at Firstup

Common questions candidates ask about this role and Firstup's workplace

The world’s first intelligent communication platform. Every company can now connect the employee experience ecosystem, personalize the employee journey, and get insights to improve engagement, productivity, and retention.

Please review the specific job listing or contact Firstup's recruiting team for details on remote or hybrid work options for this role.

Salary information may vary by role and location. Please check the specific job listing or discuss compensation during the interview process.

Firstup is an established organization in its industry. The company focuses on maintaining a supportive workplace culture for all employees.

Firstup offers competitive benefits to support employee well-being. You can view more details on their CertCheck profile.

Working at Firstup involves collaborating with a dedicated team in a dynamic environment.

As an organization that values its culture, Firstup values respect, inclusivity, and a positive environment for all employees.

Firstup has a supportive and collaborative culture, recognized as a loved place to work by its team members.

Firstup currently has 9 open positions. You can view all current openings at certcheck.mostlovedworkplace.com/companies/firstup/jobs.

The interview process typically involves an initial recruiter screen followed by team interviews. Please contact Firstup's recruiting team for specific details on this role's process.