Principal QA Engineer

Join ABBYY and be part of a team that celebrates your unique work style. With flexible work options, a supportive team, and rewards that reflect your value, you can focus on what matters most – driving your growth, while fueling ours. Our commitment to respect, transparency, and simplicity means you can trust us to always choose to do the right thing. As a trusted partner for purpose-built AI and intelligent automation, we solve highly complex problems for our enterprise customers and put their information to work to transform the way they do business. Over 10,000 customers trust ABBYY, including many Fortune 500 ones. You will work on further developing a portfolio already containing client names such as DHL, Johnson & Johnson, FDA, DMV, PwC, KeyBank, Spotify, and H&R BLOCK. We’re looking for an experienced QA Engineer to play a key role in shaping the quality strategy for ABBYY FineReader Engine, our C++-based SDK for OCR and PDF processing. You’ll work closely with other engineers to define and implement effective quality practices that support the development of high-performance, cross-platform libraries. This is a hands-on role for someone who understands how to test complex, low-level systems and has a strong background in C++. You’ll help build and scale our automation efforts, improve how we detect regressions, and make sure our core libraries perform as expected across all supported platforms. Responsibilities You will contribute to the long-term quality approach for a complex C++ codebase, with a focus on performance, correctness, and platform compatibility. You’ll help define and grow automated test systems for SDK-level testing across Windows and Linux. You’ll be responsible for setting up and maintaining performance regression tracking, using tools like valgrind, perf, or custom benchmarks to monitor behavior over time. You’ll work directly with logs, memory dumps, and tools like strace, gdb, and AddressSanitizer to track down hard-to-reproduce issues. You’ll collaborate with developers and release managers to build quality into the development process from the start. You’ll drive efforts to increase automated coverage for critical library APIs and workflows. You’ll document test scenarios, triage results, and help define useful QA metrics. Required Qualifications 10+ years of experience in QA, including solid experience testing C++ applications or libraries Strong understanding of C++, especially in the context of debugging, memory management, and performance profiling Experience with tools like valgrind, strace, gdb, perf, or similar Familiarity with cross-platform development and testing (Windows, Linux) Ability to read and understand complex C++ code and spot issues early Comfortable working in CI environments with build tools like CMake, Make, or similar Strong written and verbal communication skills Desired Qualifications Experience testing SDKs, libraries, or developer-facing APIs Exposure to fuzzing, static analysis, and similar testing methods Familiarity with OCR, image processing, or document processing libraries Experience working with hardware-agnostic test environments (e.g., virtualization, containers) Curiosity to dig deep into low-level issues and propose practical solutions Here are some of our local benefits: Partial compensation for glasses and lenses Private health insurance Volunteering Time Off (2 days/ year) SZÉP Card for recreational activities 3 extra days/ month for 'sick leave' without doctors visit Join ABBYY, and you will: Love how you work We provide remote and hybrid working options to fit all lifestyles. We use flexible hours across most of our teams to allow you to find your own definition of balance. Encouraging a culture of giving, we provide two paid volunteering days off every year so you can take time to contribute to the causes you care about. To ensure your family is cared for, we offer paid parental leave in all our locations. Love whom you work with We are a global team of 600+ colleagues, spread across 15 countries on four continents. With colleagues representing 30+ nationalities, our workforce reflects the world. Innovation and excellence run through our veins. Our teams gather the expertise which has garnered ABBYY more than 140 technology patents. We are guided by the values of respect, transparency, and simplicity. "Team Environment" is in the top three highest-scoring drivers of engagement across all of our departments. Love what you work on We are a company with more than 35 years of experience in the technology market; Over 10,000 customers trust ABBYY, including many Fortune 500 ones, with names such as DHL, Johnson & Johnson, FDA, DMV, PwC, KeyBank, Spotify, and H&R BLOCK; We have modernized the capture market by creating the first low-code/no-code IDP platform. Our Machine Learning, Natural Language Processing, Computer Vision Technologies, and a marketplace built with AI, can transform any document in any process; Top Analyst firms recognize ABBYY's market leadership, including Gartner, Everest PEAK Matrix ® Assessment, ISG Intelligent Automation Lens, and NelsonHall, amongst others. ABBYY is an Equal Employment Opportunity employer that values the strength that diversity brings to the workplace. To learn more about our commitment to Diversity and Inclusion, check out the careers section on our website.