Senior Backend Engineer (.NET)

At Semperis, our mission is to be a Force for Good. Starting with being a great place to work. We believe that when people feel valued, supported, and empowered, they do their best work. That’s why we focus on creating an employee experience rooted in purpose, growth, and balance. Semperis has been recognized as one of America’s Fastest-Growing Cybersecurity Companies by the Inc. 5000, a DUNS 100 Top Startup to Work For, and a multi-year Inc. Best Workplace awardee.

About The Role

We are seeking an exceptional Senior Backend Engineer to join our Posture and Readiness Pillar, where you will responsible for end-to-end features implementation, testing and delivery that power Semperis's enterprise security and identity products. This is a highly collaborative role requiring both technical excellence and strong cross-functional partnership skills.

What You Will Be Doing

• Participate in the development of SaaS product helping our customers to protect Microsoft Entra Id, Microsoft Active Directory, and Microsoft 365 applications.
• Be responsible for end-to-end features implementation, testing and delivery.
• Communicate effectively, share knowledge, and drive team success.
• Facilitate innovations, code and architecture improvements, quality / security best practices.

What You Will Bring To The Table

• 5+ years experience in C# and .NET Core and demonstrated ability to produce production-ready code at a company of similar size and complexity.
• All-around team player who is self-motivated with a high work ethic.
• Knowledge of data structures and algorithms.
• Experience in enterprise applications and distributes systems development.
• Experience with SQL/NoSQL databases, data modelling.
• Experience with writing acceptance tests.
• Experience with agile development process.
• Strong communication skills with both internal team members and external business stakeholders.

Bonus Points

• Experience with containerized applications or microservices working in Kubernetes cluster.
• Advanced knowledge of multi-threading and async programming (C#, Python).
• Experience with Azure Blob Storage, Opensearch / Elastic, Redis, SQLlite, MS SQL.
• Knowledge of Microsoft Entra Id (Azure AD), Microsoft 365, Azure AD Connect, Azure Ad B2C
• Knowledge of Azure Application programming model and API.
• Experience working with protocols and frameworks: HTTP, TLS, GRPC, WebSocket, AMQP, Kafka, OAuth / OpenId Connect (OIDC), SAML, REST
• Knowledge / understanding of security programming best practices.
• Experience of developing and maintaining multi-tenant SaaS application hosted on Azure or Amazon
• Knowledge of Windows / Linux / Web Security
• Knowledge / experience of encryption algorithms and their use cases

Why Join Semperis?

You’ll be part of a global team on the front lines of cybersecurity innovation. At Semperis, we celebrate curiosity, integrity, and people who take initiative. If you’re someone who sees the glass as half full, embraces challenges as growth opportunities, and values a healthy balance between work and life—we’d love to meet you.

• Semperis maintains office locations in several cities across the globe. Where the job description specifies a required location, candidates will follow our hybrid work model. This includes working up to three days per week and remotely the remaining days.

Semperis is an equal opportunity employer and will not discriminate against an applicant or employee based on race, color, religion, creed, national origin or ancestry, ethnicity, sex (including gender, pregnancy, sexual orientation, and gender identity), age, physical or mental disability, veteran or military status, genetic information, citizenship, marital status, or any other legally recognized protected basis under federal, state, or local law. The information collected by the Semperis application is solely to determine suitability for employment, verify identity, and maintain employment statistics.

Applicants with disabilities may be entitled to reasonable accommodation under the Americans with Disabilities Act and/or other applicable state or local laws. A reasonable accommodation is a change in the way things are normally done which will ensure an equal employment opportunity without imposing undue hardship on Semperis. Please inform Semperis representative Anna Taylor, Director of Global Recruiting, if you need assistance completing this application or to otherwise participate in the application process.