Backend Software Engineer

We protect some of the world’s largest, most complex hybrid Active Directory (AD) environments. And we have fun doing it. Ready to join us? Explore Semperis cybersecurity careers and other open positions.

Toronto

Full time

Hybrid

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.

Be part of our hybrid team in the Toronto region—work on-site in Toronto, ON two days per week.

About Ready1
Ready1 is Semperis' enterprise crisis management platform designed to bring order to chaos during cyber crises. We unify preparedness, incident response, and recovery in a single, secure SaaS solution that functions even when primary infrastructure is down. Ready1 bridges IT, business, and compliance - providing real-time coordination across security, legal, operations, and leadership during the moments that matter most.

What we are looking for
:

We are looking for a Backend Software Engineer to join our Engineering Team

What you will be doing:

Design, implement, test, and deliver end-to-end features for our Incident Response cloud SaaS product.

Drive improvements in architecture, innovation, and adoption of quality and security best practices.

Build strong collaboration, share knowledge openly, and contribute to a high-performing team culture.

Paid on-call rotation as needed to support Semperis products.

What you will bring to the table:

4+ years of professional experience with .NET Core, delivering production-ready code at scale.

Expertise in multi-threading and asynchronous programming (C#).

Proven experience building and maintaining multi-tenant SaaS applications on Azure.

Hands‑on experience with containerized applications running in Kubernetes clusters.

Background in enterprise applications and distributed systems development.

Experience writing well‑structured and comprehensive automated test suites.

Excellent communication skills with both technical and non‑technical stakeholders.

Bonus Points:

Knowledge of Microsoft Active Directory, Entra , Windows Security, and authentication protocols (OIDC, OAuth, SAML, NTLM, Kerberos).

Familiarity with communication protocols: HTTP, TLS, Signal

R, gRPC.

Experience with databases such as Postgres.

Understanding of secure coding practices and encryption algorithms.

What We Offer

Opportunity to work on an innovative cloud‑based product.

Impactful work:
Build technology that helps organizations respond to and recover from cyber crises

Collaborative culture:
Work with talented engineers across multiple Ready1 engineering teams

Enablement and empowerment:
We believe in giving teams the resources, accountability, and autonomy to succeed

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. Candidates who reside within 45 miles of one of our offices—or where the job description specifies a required location—will follow our hybrid work model. This includes working onsite 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…