Principal Backend Engineer
Payactiv
On-site
Austin, Texas, United States
Backend Development
Principal Backend Engineer - Location: Austin, TX (Onsite at our Office in The Domain area)
Who we are…
We are Payactiv, a mission-driven FinTech company and the pioneer in Earned Wage Access. As the only Certified B Corporation and Public Benefit Corporation in our space, we are committed to making a difference by providing millions of workers with financial flexibility and wellness tools. Our mobile and web apps help users avoid debt traps, manage money smartly, and gain control over their financial lives.
Who you are…
You are a seasoned Backend Engineer with a deep understanding of scalable architectures, data modeling, and API design. You’ve built robust backend services and cloud-based platforms, and you take pride in writing clean, efficient, and maintainable code. You thrive in a fast-paced environment, enjoy solving complex problems, and work collaboratively to deliver high-quality software solutions that drive business impact.
What you will do…
- Design, develop, and maintain robust backend systems using the .NET stack (C#, .NET Core).
- Build and manage APIs and microservices to support scalable, distributed systems.
- Work with SQL, NoSQL, and PostgreSQL databases to ensure reliable and performant data access.
- Collaborate with front-end and full-stack engineers to integrate system components.
- Participate in system design, architectural reviews, and technical planning.
- Ensure high availability, scalability, and security of backend services.
- Develop and maintain CI/CD pipelines and contribute to DevOps automation.
- Monitor and troubleshoot production systems, resolving issues and optimizing performance.
What you need…
- Bachelor’s or Master’s degree in Computer Science, Engineering, or equivalent experience.
- 6+ years of backend development experience, with at least 3 years in .NET Core and C#.
- Strong knowledge of SQL/NoSQL databases, including PostgreSQL.
- Hands-on experience with AWS services (e.g., Lambda, EC2, RDS, S3).
- Experience designing RESTful APIs and integrating third-party services.
- Proficiency in CI/CD practices, build automation, and deployment tools.
- Solid understanding of software engineering best practices, system design, and performance optimization.
- Bonus: Experience with Python or data processing pipelines.
What we offer…
- Company-sponsored health, dental, and vision insurance
- Health, dental, and vision reimbursement accounts
- 401(k), both traditional and Roth with company match
- Tuition assistance or reimbursement
- Unlimited paid time off
- Monthly gym reimbursement
- Paid time off to volunteer
- Paid family leave
- Complimentary office lunches
- A purpose-driven culture and an opportunity to grow with a passionate team