Application Software Engineer, Endpoint Security
About Oneleet
Oneleet is one of the fastest-growing security and compliance platforms in history. We are on a mission to change the compliance and security industry — making cybersecurity and compliance effective, easy, and painless. We do this by providing a platform that helps companies build, manage, and monitor their cybersecurity programs and achieve compliance standards such as SOC 2 and ISO 27001 efficiently, without cutting corners.
Oneleet just raised a Series A of $33 million and is rapidly growing in customers and employees. The team has several decades of experience in security and compliance.
Be a part of our team of opinionated rebels and help us create a category-defining company reshaping the broken and fragmented compliance and cybersecurity industry.
Who we’re looking for:
We value passionate self-starters with a growth mindset and a bias for action and personal accountability. If you love solving hard problems, thrive in ambiguity, and want to make a real impact, you’ll fit right in.
We’re especially drawn to:
Rebels with a cause — frustrated with the status quo and eager to disrupt it.
Opinionated (but not obstinate) builders — decisive yet collaborative, who help us move fast.
Clear communicators — who own their ideas and follow through.
Our mission is simple: make effective cybersecurity painless. We believe cybersecurity should empower, not burden. This belief unites our team and drives every decision we make.
If you’re ready to challenge the status quo and help shape the future of cybersecurity, we’d love to meet you.
As an Engineer on the Oneleet Agent team, you'll be responsible for developing and maintaining our cross-platform endpoint security agent that monitors, configures, and protects employee devices. You'll work on everything from low-level system configuration automation to high-level API design that enables seamless communication between endpoints and our cloud platform.
You'll architect solutions that collect security telemetry, enforce compliance policies, and monitor for vulnerabilities across Windows, macOS, and Linux environments. This role requires deep technical expertise in system programming, security best practices, and the ability to build software that operates reliably in diverse enterprise environments.
As a seed stage startup, you'll collaborate directly with the founding team and have significant influence over the technical direction of our endpoint security capabilities.
Key Responsibilities:
Design and implement cross-platform agent functionality for Windows, macOS, and Linux using Go and JavaScript
Build low-level configuration automation and system monitoring capabilities that interact with OS-specific APIs and security frameworks
Develop secure communication protocols between agents and our cloud platform using gRPC or REST APIs
Implement real-time threat detection and response capabilities at the endpoint level
Create robust update and deployment mechanisms that ensure agents remain current without disrupting user workflows
Build telemetry collection systems that provide visibility into device security posture while respecting privacy
Collaborate with the security team to implement new detection rules and compliance checks
Ensure agent performance is optimized to minimize system resource usage
Develop comprehensive testing strategies for multi-OS compatibility
Create tools and dashboards for monitoring agent health and deployment status across thousands of endpoints
Qualifications:
5+ years of professional software development experience with a focus on systems programming or security software
Strong experience with Go and JavaScript for building production-grade applications
Deep understanding of operating system internals across Windows, macOS, and Linux
Experience with low-level configuration automation and system administration across multiple platforms
Proven experience with gRPC or REST API design and implementation
Experience building software that runs with elevated privileges while maintaining security
Strong understanding of endpoint security concepts and best practices
Experience with cross-platform development challenges and solutions
Excellent debugging and troubleshooting skills for complex system-level issues
Bonus: Experience with Electron for building cross-platform desktop applications
Bonus: Experience with Windows APIs, macOS system frameworks, or Linux kernel interfaces
Bonus: Background in cybersecurity, particularly endpoint detection and response (EDR) or mobile device management (MDM)
Bonus: Experience with certificate management and cryptographic operations
Bonus: Familiarity with compliance frameworks (SOC2, ISO27001, HIPAA)
Bonus: Experience with real-time data streaming and event processing
Bonus: Bachelor's or Master's degree in Computer Science, Cybersecurity, or related field
Why Oneleet?
At Oneleet, you’ll join a tight-knit team of rebels redefining the cybersecurity industry. We move fast, own our work, and challenge outdated models to make security effortless and effective for companies.
Here’s what makes us special:
We value impact over titles, autonomy over micromanagement, and clarity over jargon.
You’ll tackle meaningful, hard problems with real-world consequences.
You’ll work with smart, kind, and ambitious teammates who lift each other up.
Perks & Benefits
Comprehensive health & welless benefits
Competitive comp & equity
Generous PTO, including floating holidays to honor what matters most to you
Flexible, remote work culture
Quarterly off-sites to cool places (Amsterdam, Italy, etc).
Remote-First & Global Hiring
We’re a remote-first company and hire globally in regions where we can legally engage talent—either directly or via our employer-of-record (PEO) partner. If you’re based outside the U.S., we’ll explore the most compliant hiring arrangement for your location.
U.S. Hiring & E-Verify
For U.S.-based candidates, Oneleet participates in E-Verify to confirm employment eligibility, in accordance with federal regulations.