Quality Engineer

🚀 CUJO AI® is a leader in artificial intelligence solutions for network service providers. We use machine learning and real-world data to develop cybersecurity, device intelligence, network intelligence, and parental control solutions that make internet connections safer for millions of homes. 

About the Role 

We are looking for a Quality Engineer to join our team in Lithuania. 

Quality at CUJO AI is not a final checkpoint — it’s embedded into how we build. Our products run on real home networks, protecting real families, which means quality issues have a direct impact on customers. The E2E Quality team works across firmware, cloud backend, and mobile products to ensure that what we ship is solid, safe, and reliable. 

We believe the best quality engineers are defined less by the number of tests they write and more by their judgment about what matters to test. We’re looking for someone who can think like an engineer, reason about risk before it becomes a defect, and influence how the whole team approaches quality — not just their own slice of it. 

In This Role, You Will: 

• Build automation that lasts — write Python-based test automation that is clean, maintainable, and actually used by the team. Follow CUJO's standards and take pride in code that holds up over time. 
• Stay close to the customer — ground your testing in how real customers use the product. Translate real-world usage patterns into meaningful test coverage and surface issues before they reach production. 
• Contribute to quality outcomes — take responsibility beyond test execution. Understand release readiness, communicate risks clearly, and support quality decisions with data. 
• Track and communicate risk — keep stakeholders informed on quality status, open defects, and mitigation plans. Connect what's happening in testing to what it means for the release. 
• Contribute to quality strategy — participate in shaping test approaches that reflect both technical risk and customer impact. Make sure QA activities are transparent, measurable, and sustainable. 
• Share what you know — document your work, share learnings with the team, and contribute to a company-wide culture of quality.

What We’re Looking For: 

Technical Knowledge 

You should be able to reason about and work effectively with: 

• Python — writing clean, production-quality test automation code. 
• Networking fundamentals: TCP/IP, DNS, DHCP, HTTP/HTTPS, VPN. 
• Test frameworks such as Pytest and modern automation tooling. 
• Test case design, defect management, and E2E & UAT testing. 
• CI/CD pipelines and integrating tests into automated build flows. 
• Agile development environments and iterative testing practices. 

Engineering Judgment 

We weight these capabilities heavily: 

• Quality sense — you ask the right questions about coverage and are curious about the why behind test decisions. 
• Analytical & problem-solving — you treat bugs as signals, not annoyances. You trace root causes systematically and propose solutions, not just reports. 
• Communication — clear verbal and written English; you can explain a quality risk to an engineer or a product manager in terms they care about. 
• Collaboration — you build quality practices with teams, not around them. You're easy to work with and make the people around you more quality-aware. 
• Ownership — you follow through. From risk identification to resolution, you don't consider your job done until the problem is. 
• Trade-off awareness — you understand that not everything can be tested deeply. You know when to go deep and when to move on, and you can explain why. 

What Will Make You Stand Out: 

• 2+ years in software QA, with exposure to more than one product or domain. 
• Experience testing networking products, cybersecurity systems or embedded firmware. 
• Hands-on familiarity with traffic capture tools (Wireshark, tcpdump, Linux) — you don't need to be an expert, but you're comfortable getting there. 
• You've noticed when a process wasn't working and done something about it — even small improvements count. 
• You've shared knowledge with teammates or contributed to how the team tests, formally or not. 
• Clear verbal and written English — you're comfortable working and communicating in an international team.

Why Join CUJO AI? 

• Flexible Work – Hybrid work model with flexible hours, centered around our Kaunas office. 
• Modern Equipment – Top-of-the-line development tools to do your best work.
• Team Gatherings – Annual company events and team activities. 
• Career Growth – Conferences, training, books, and anything else you need to keep developing.
• Performance Bonuses – Company-wide annual bonus program. 
• Referral Rewards – Earn up to €1,000 for referring new hires. 
• Meaningful Work – Help make the internet safer for millions of people around the world.

The base salary for this role is from 3300 EUR to 4300 EUR (gross), depending on your experience.

At CUJO AI, we value innovation, collaboration, and continuous improvement. Join us and work on technology that makes the internet safer!

📅 Apply by September 20, 2026 – but don’t wait! We’ll hire as soon as we find the right person. 

📩 Apply via our recruitment portal. Questions? Email us at [email protected].