Full Stack Developer (Backend)

As a leading provider of AI-powered extended managed detection and response (MXDR) services, Ontinue is on a mission to be the most trusted, 24/7, always-on security partner that empowers customers to embrace the future by using AI to operate more strategically, at scale, and with less risk. We believe that the combination of AI and human expertise is essential for delivering effective managed security that is tailored to a customer’s unique environment, operational constraints, and risks.

Our MXDR service combines powerful proprietary AI with a one-of-a-kind collaboration model to continuously build a deep understanding of our customers’ environments, informing how we prevent, detect, and respond to threats. Our unrivaled Microsoft expertise allows customers to achieve these outcomes with the Microsoft Security tools they already own. The result is highly localized managed protection that empowers security teams to be faster, smarter, and more cost efficient than ever before.

Continuous protection. AI-powered Nonstop SecOps. That’s Ontinue.

Role Overview

As a Back-End Engineer at Ontinue, you will play a critical role in designing, developing, and maintaining the services, APIs, and data platforms that power the ION MXDR platform. You will work closely with front-end engineers, product managers, security experts, and data engineers to build scalable, resilient, and secure cloud-native systems that support real-time security operations and customer-facing capabilities.

The ideal candidate is passionate about building highly available distributed systems, enjoys solving complex technical challenges, and thrives in a fast-paced environment focused on cybersecurity innovation.

Key Responsibilities

• Design, develop, and maintain scalable, secure, and high-performance back-end services for the ION MXDR platform.
• Build and maintain RESTful APIs and microservices that support platform functionality, integrations, and customer experiences.
• Develop and optimize data processing pipelines for security telemetry, threat intelligence, and operational analytics.
• Collaborate with front-end engineers to deliver reliable end-to-end platform capabilities.
• Design and implement cloud-native architectures leveraging Azure services and modern engineering practices.
• Ensure system reliability, observability, and performance through monitoring, logging, tracing, and automated alerting.
• Optimize database schemas, queries, and storage strategies to support large-scale security data workloads.
• Implement secure coding practices and contribute to platform security, compliance, and resilience initiatives.
• Participate in architecture discussions, technical design reviews, and code reviews.
• Contribute to CI/CD pipelines, infrastructure automation, and deployment processes.
• Troubleshoot and resolve production issues while maintaining high availability and service reliability.
• Stay current with emerging technologies, cloud-native patterns, cybersecurity trends, and software engineering best practices.

Required Experience & Skills

Required

• Experience: 5+ years of professional back-end software development experience.
• Education: Bachelor's degree in Computer Science, Engineering, or a related field (or equivalent practical experience).

Technical Skills

• Strong proficiency in C# and .NET development.
• Experience designing and building RESTful APIs and microservices architectures.
• Experience with cloud platforms, preferably Microsoft Azure.
• Strong understanding of distributed systems, scalability, performance optimization, and reliability engineering.
• Experience working with relational and/or NoSQL databases, including schema design and query optimization.
• Experience with event-driven architectures, messaging technologies, and event sourcing / CQRS patterns.
• Experience implementing automated testing, including unit, integration, and end-to-end testing.
• Proficiency with version control systems and modern software development workflows (Git).
• Strong understanding of secure software development practices and API security principles.
• Experience working with CI/CD pipelines and infrastructure-as-code practices and tools.
• Experience with observability platforms, monitoring solutions, and operational analytics.

Preferred

• Experience with Azure-native services including Azure Service Bus, Azure Functions, Azure App Services, Application Gateway, Azure Storage, Azure SQL, Cosmos DB, Cache for Redis, Azure Key Vault, Managed Identities, Entra ID.
• Experience with GitHub, GitHub Actions, Jira, Confluence, Terraform.
• Experience with multi-tenant SaaS architectures and complex enterprise customer hierarchies.
• Experience designing and securing RESTful APIs and Backend-for-Frontend (BFF) layers behind Azure APIM and Front Door.
• Experience with Azure Cosmos DB (data modeling, partition keys, Change Feed triggers) and NoSQL persistence.
• Familiarity with distributed tracing, logging, and observability tools (Azure Application Insights, ADX / Kusto).
• Good understanding of Microsoft Entra ID (Azure AD), OAuth 2.0 / JWT security, Managed Identities, and role-based access control (RBAC).
• Experience processing large-scale telemetry, log, or security event data.

Nice to have

• Familiarity with Microsoft security technologies such as Microsoft Sentinel and Microsoft Defender.
• Domain background in SecOps, MDR/XDR, or security incident management workflows.
• Experience integrating with Microsoft Sentinel, Defender XDR, or Microsoft Graph APIs.

What We Offer

We have been recognized as a top place to work! In addition to a competitive salary, we also offer great benefits and access to management and Microsoft training.

Come as you are! We search for amazing people of diverse backgrounds, experiences, abilities, and perspectives. Ontinue welcomes and encourages diversity in the workplace regardless of race, gender, religion, age, sexual orientation, disability, or veteran status.

Next Steps

If you have the skills and experience required and feel that Ontinue is a place you can belong, we would love to get to know you better! Please drop an application to this role and our talent acquisition manager will be in touch to discuss further.

Learn more: www.ontinue.com