Senior QA Engineer in Banja Luka, Republika Srpska at OddBytes, LLC

As an independent strategic development partner of OddBytes, a US-based, performance-driven digital media company, Bravo Systems helps power advanced online video, display, and mobile advertising technologies for advertisers and publishers worldwide.

Whether it’s a creator growing their audience, a brand reaching the right users, or a reader discovering something new, we strive to make those moments seamless, relevant, and even a little fun.

For over 20 years, we’ve combined product insight, marketing expertise, and smart monetization strategies to connect millions of users with what matters most to them. And we’re just getting started.

At the heart of our success is our exceptional team of engineers. Their expertise, creativity, and dedication have been instrumental in delivering innovative solutions and driving numerous successful projects across the global digital landscape.

We’re a distributed team, with roots in California and strong, long-standing partnerships across Europe. That means we work across time zones, locations, and cultures, without losing alignment or momentum.

• Huntington Beach, CA
• Banja Luka, Bosnia and Herzegovina
• Belgrade, Serbia

Our Banja Luka and Belgrade teams work across product, engineering, QA, and design. They’re central to how we operate and grow. This is decades of experience, a culture of technical rigor, and a shared sense of ownership to everything we build.

We’re 150+ people strong, and our structure is built to be cross-functional teams that ship smart and move fast. If you're someone who likes autonomy and accountability, you'll feel right at home.

Here are a few of the projects that define our current focus:

Every link tells a story. This one earns too.

Chirp is a free, customizable bio link built to be shared and designed to earn. Creators and brands can monetize through ad-sharing, brand partnerships, and more. All from one beautifully designed link.

Platform refers to a system where a central platform manages and distributes campaigns, data, or content across multiple connected channels or endpoints. It's strategic model used to streamline operations, unify reporting, and scale campaigns efficiently.

We also run a mobile app distribution network, a content monetization platform for publishers, and a portfolio of web properties that fuel ongoing revenue.

We’re hiring a Senior QA Engineer to own quality across our product lifecycle. In this role, you’ll design and execute manual and automated testing strategies, improve test coverage, and work closely with developers and product teams to ship reliable software with confidence.
You’ll be responsible for test planning, creating and maintaining automated test scripts, running regression, smoke, exploratory, API, security, and performance tests, and helping improve our QA processes and tooling. You should be comfortable identifying risks early, debugging issues, and ensuring quality from the end-user perspective.

• Own end-to-end QA for features and releases.
• Design, write, and execute manual test cases.
• Build, maintain, and improve automation frameworks and test scripts.
• Perform API testing using tools like Postman and REST clients.
• Run cross-browser and cross-device testing using tools like BrowserStack.
• Support basic security assessments and performance/load testing.
• Collaborate with engineering, product, and other stakeholders.
• Mentor junior QA team members and help raise testing standards.
• Benchmark AI tools and test AI tools as a plus.

• Strong experience in QA automation and manual testing.
• Solid understanding of test strategy, bug lifecycle, and CI/CD workflows.
• Experience with API testing, regression testing, and defect analysis.
• Strong ownership mindset and ability to work independently.
• Bonus: experience benchmarking AI tools and testing AI tools.