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.
We are seeking an exceptional Senior Backend Engineer to join our Posture and Readiness Pillar, where you will be 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
This will be a hybrid role for our Dallas, TX location.
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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.

For security teams charged with defending hybrid and multi-cloud environments, Semperis ensures the integrity and availability of critical enterprise directory services at every step in the cyber kill chain and cuts recovery time by 90%. Purpose-built for securing hybrid identity environments—including Active Directory, Entra ID, and Okta—Semperis’ AI-powered technology protects over 100 million identities from cyberattacks, data breaches and operational errors. The world’s leading organizations trust Semperis to spot directory vulnerabilities, intercept cyberattacks in progress and quickly recover from ransomware and other data integrity emergencies. Semperis is headquartered in Hoboken, New Jersey, and operates internationally, with its research and development team distributed throughout the United States, Canada and Israel.
Semperis hosts the award-winning Hybrid Identity Protection conference and podcast series (www.hipconf.com) and built the community hybrid Active Directory cyber defender tools, Purple Knight (www.semperis.com/purple-knight/) and Forest Druid. The company has received the highest level of industry accolades, recently named to Inc. Magazine’s list of best workplaces for 2024 and ranked the fastest-growing cybersecurity company in America by the Financial Times. Semperis is a Microsoft Enterprise Cloud Alliance and Co-Sell partner and is a member of the Microsoft Intelligent Security Association (MISA).