Senior Software Development Engineer in Test (SDET)

Todyl

Salary: $155k - $185k
Experience: 10+ yrs
Location: Denver or Atlanta
Job type: Full-time

Required skills

Wireshark
tcpdump
iperf
curl
mtr
Linux
Python
Bash
REST
gRPC
TCP/IP
DNS
DHCP

About the role

Senior Software Development Engineer in Test (SDET)

About Us

At Todyl, we are on a mission to protect small and medium-sized businesses from ever-changing cyber threats. The Todyl platform fully integrates threat, risk, and compliance management to provide exceptional and affordable unified cybersecurity solutions to MSPs (Managed Service Providers) and their end customers.

At the end of the day, we’re here to keep our partners and customers safe and help them manage the risks and comply with regulations. Protecting others requires a team that works together with trust and cares deeply about carrying out our mission.

About the Role

We are seeking a Senior SDET to architect, design and build a comprehensive automated regression, performance and security testing framework for our backend systems. This role requires deep technical expertise, particularly in networking and a drive to improve quality and reliability at scale.

This is a senior-level, cross-functional position ideal for someone who can think holistically, act autonomously and build from the ground up. The ideal candidate is passionate about test automation, thrives in cross-functional environments and is driven to build systems that minimize manual effort and enable teams to scale efficiently.

Key Responsibilities:

Design, develop and execute test plans for networking software and hardware components.

Implement automated test systems covering regression, performance and security.

Collaborate with QA, SRE and engineering teams to define test strategies and integrate into CI/CD pipelines.

Validate distributed systems consisting of Linux-based appliances, services and APIs.

Conduct performance, scalability and security testing across complex networked environments.

Simulate real-world traffic and inject faults to test reliability under various conditions.

Identify, document and track bugs or performance issues, ensuring high system quality.

Requirements:

10+ years of proven experience in software quality assurance, with deep expertise in quality processes, tools, and metrics, including the development of testing strategies from the ground up

Hands-on experience with test automation frameworks, including architecture design, development, and scripting.

Experience working in Agile development environments using software build tools, CI/CD integrations, deployment process and code quality checking tools

Strong networking fundamentals and deep understanding of protocols like TCP/IP, DNS and DHCP.

Experience designing test frameworks and automation infrastructure from scratch.

Proficient in reviewing and interpreting PCAP files using tools like Wireshark or tcpdump.

Hands-on with network testing tools such as iperf, curl, mtr and Wireshark.

Experience developing and executing test plans for network software/hardware systems.

Proven track record in Linux system administration and scripting (e.g., Bash, Python).

Comfortable working with REST/gRPC APIs and debugging network interactions.

Nice to Have:

Experience in data center environments with server hardware/software installation and troubleshooting.

Familiarity with proxy testing (HTTP/HTTPS), firewall testing and VPNs.

Experience with Docker and virtualization/containerization technologies.

Exposure to BGP, encryption and certificate-based security setups.

Proficiency in mocking/simulating APIs and reverse engineering interfaces.

Familiarity with RDBMS systems and their interaction with backend services.

Comp: $155,000 – $185,000 Depending on experience background and skillset

About Todyl

Provides a unified cloud-native cybersecurity platform for small businesses.

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