Bytro strives to develop high-quality strategy games and make them accessible to all players around the world. We are committed to creating the best work environment possible and are not afraid to try out different initiatives to enable Bytronians to have more flexibility and a better work-life balance. At Bytro you can expect a professional working environment in a fun atmosphere:You will shape the future of the growing games market; we are an owner-managed company with a flat hierarchy and fast implementation of projects. There is a great team of colleagues you can rely on.

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As a Senior QA Engineer at Twin Harbour Interactive, you will be instrumental in designing, building, and enhancing automation and test frameworks to ensure the backend and frontend stability of our game platform. Your role involves optimizing testing standards and practices, spearheading the implementation of AI-driven automated testing, and leading technical discussions on backend testing best practices. You will work closely with development teams to ensure efficient test coverage and contribute to delivering high-quality strategy games.

<h4 class="text-lg md:text-xl font-semibold mt-6 mb-2 text-gray-800">Join our development team as Senior QA Engineer!</h4>At <a href="https://www.linkedin.com/company/twinharbourinteractive/about/" target="_blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">Twin Harbour Interactive</a> we strive to develop high-quality strategy games and make them accessible for all players around the world. In our eyes game development is a promise for fun and entertainment - that’s what we live and aim for!As a Senior QA Engineer, you will be responsible for designing, building, and enhancing automation and test frameworks for a better backend and frontend stability of our game platform, focusing on applications used by our game teams as a service. You will work closely with our development teams to optimize testing standards and practices ensuring efficient test coverage. In addition, you will spearhead the implementation of AI-driven automated testing and decision-making around backend testing best practices.Please submit your resume outining your relevant experience and why you are interested in joining Twin Harbour Interactive. We look forward to hearing form you!<h4 class="text-lg md:text-xl font-semibold mt-6 mb-2 text-gray-800">YOUR MISSION</h4><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Design and implement scalable automation and robust test frameworks for backend and frontend stability to ensure seamless testing processes.</li><li class="leading-relaxed">Perform advanced performance profiling and oversee end-to-end UI/UX testing strategies across all game platforms.</li><li class="leading-relaxed">Drive CI/CD pipeline improvements for continuous testing.</li><li class="leading-relaxed">Conduct security testing and cross-platform compatibility testing to identify vulnerabilities in backend services.</li><li class="leading-relaxed">Develop advanced automated tests to debug complex, multi-layered issues; and identify and resolve complex UI performance issues (rendering, lag, responsiveness).</li><li class="leading-relaxed">Implement AI-driven or script-based automated testing for game UI interactions.</li><li class="leading-relaxed">Lead technical discussions and decision-making around backend testing best practices, and guide the adoption of automation tools and practices to ensure efficient frontend test coverage.</li><li class="leading-relaxed">Collaborate with team members and our development colleagues to improve testing standards and practices.</li><li class="leading-relaxed">Contribute to the development and execution of QA strategies that align with our long-term development goals.</li></ul><h4 class="text-lg md:text-xl font-semibold mt-6 mb-2 text-gray-800">YOUR PROFILE</h4><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Professional with 5+ years of experience in full-stack QA testing, backend and frontend automation.</li><li class="leading-relaxed">Skilled in creating reusable automation frameworks and scalable testing pipelines.</li><li class="leading-relaxed">Experience with performance profiling, debugging, and scalability testing.</li><li class="leading-relaxed">Strong programming skills in Java or Node.js.</li><li class="leading-relaxed">Deep understanding of game engine UI workflows (Unity).</li><li class="leading-relaxed">Excellent communication and collaboration skills to foster cross-functional alignment on quality objectives.</li><li class="leading-relaxed">First experience in mentoring other QA Engineers, Developers, etc. in test automation and quality assurance best practices.</li></ul><h4 class="text-lg md:text-xl font-semibold mt-6 mb-2 text-gray-800">Why You'll Love Working With Us</h4>##### A Global Team, A Shared PurposeOur strength lies in our diversity. With over 30 nationalities represented across our two locations, we’re united by a shared passion for strategy games and a bold vision for the future. We celebrate what makes each of us unique - our perspectives, our stories, and the paths that led us here.##### Work Your WayWhether you're crafting code from a harbor-view desk in Hamburg or fine-tuning design details under the Maltese sun, we support flexible hybrid work models that empower you to do your best work - wherever you are.##### Grow With UsAt Twin Harbour, your journey matters. Our Career Path Framework and mentorship culture provide the clarity and feedback you need to take the next step – whether you’re deepening your expertise or branching into new disciplines. We invest in your growth with language courses, e-learning platforms, and support for conferences and training.##### We’re Human FirstWe believe that great teams are built on trust, respect, and good humor. From game nights to casual drinks, quiz nights, and karaoke, we don’t just work together - we connect, play, and support each other like a true crew.<h4 class="text-lg md:text-xl font-semibold mt-6 mb-2 text-gray-800">Join Twin Harbour Interactive</h4>##### Where Strategy Meets Vision.<a href="https://www.linkedin.com/company/twinharbourinteractive/about/" target="_blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">Twin Harbour Interactive</a> is a global strategy game powerhouse, shaping the future of long-term multiplayer gaming. With offices in Hamburg and Malta, we design strategy games that bring people together - across borders and generations.Whether you’re an expert tactician or an imaginative world-builder, there’s a place here for you to grow, thrive, and leave your mark.<h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">About Twin Harbour Interactive</h3>We're on a mission to create unforgettable strategy experiences. If you're curious, collaborative, and driven by impact, we’d love to meet you.At Twin Harbour Interactive, you'll step into a creative, collaborative environment where your ideas help shape the future of long-term strategy gaming. With the agility of an indie team and the reach of a global studio, we value innovation, ownership, and bold thinking.We're a passionate, multicultural crew with a flat hierarchy and a deep love for smart game design. Whether you're coding, creating, or coordinating, you'll have the freedom to make an impact—and the support to keep growing.Expect meaningful challenges, curious minds, and a work setup that fits your needs. Our games are built using C#, JavaScript/HTML5, Java, and PHP—and always with players at the center.With studios in Hamburg’s iconic St. Pauli district and sunny San Ġiljan, Malta, you’ll enjoy inspiring views, an international vibe, and a team that loves what they do.Founded in 2025Coworkers about 130

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As a Principal SDK Engineer, you will lead the design and development of scalable, privacy-conscious data collection systems within Unity's Ads organization. This role involves gathering, validating, and utilizing behavioral signals from client applications to power machine learning use cases like ad targeting and optimization. You will work at the intersection of SDK development, machine learning, and data infrastructure, creating innovative solutions that impact billions of global ad experiences while ensuring privacy and compliance.

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<h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">The opportunity</h3>We invite you to take on a meaningful role as Principal SDK Engineer, where you’ll lead the design and development of scalable, privacy-conscious collection systems within our Ads organization. You will play a vital part in gathering, validating, and utilizing behavioral signals across client applications to empower groundbreaking machine learning use cases, such as ad targeting, ranking, and optimization.This is your chance to work at the exciting intersection of SDK development, machine learning, and data infrastructure. Join us to create innovative solutions that propel advertising technology forward, impacting billions of global ad experiences while ensuring privacy and compliance.<h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">What you'll be doing</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Designing, implementing, and maintaining SDKs that collect high-quality behavioral and contextual signals from client applications such as mobile, desktop, and Unity.</li><li class="leading-relaxed">Establishing and promoting instrumentation standards to ensure high-quality data collection for machine learning systems.</li><li class="leading-relaxed">Collaborating with multi-functional teams, including ML scientists, data engineers, and product managers, to adapt SDKs to evolving ML needs.</li><li class="leading-relaxed">Developing tools and frameworks to validate, monitor, and test collected data in production environments.</li><li class="leading-relaxed">Partnering with privacy and legal teams to ensure compliance with global regulations, such as GDPR and CCPA, while prioritizing user consent.</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">What we're looking for</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Strong proficiency in client application platforms like iOS, Android, Unity, or C++.</li><li class="leading-relaxed">Proven track record in event-based data collection, telemetry, and analytics frameworks.</li><li class="leading-relaxed">Experience in data preprocessing and quality assurance for machine learning pipelines.</li><li class="leading-relaxed">Familiarity with experimentation frameworks, including A/B testing and signal gating.</li><li class="leading-relaxed">Ability to work effectively in multi-functional teams and lead initiatives across SDK, infrastructure, and ML platform teams.</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Additional information</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Relocation support is not available for this position.</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Life at Unity</h3>Unity [NYSE: U] is the leading platform to create and grow games and interactive experiences. 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Our differences are strengths that enable us to support the growing and evolving needs of our customers, partners, and collaborators. If you have a disability that means there are preparations or accommodations we can make to help ensure you have a comfortable and positive interview experience, please fill out <a href="https://docs.google.com/forms/d/e/1FAIpQLSdrbRLG1N-apH1eahQ622Gypo-rmiAB6LLTP1UsSWQNu7omxQ/viewform" target="blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">this form</a>to let us know._This position requires the incumbent to have a sufficient knowledge of English to have professional verbal and written exchanges in this language since the performance of the duties related to this position requires frequent and regular communication with colleagues and partners located worldwide and whose common language is English.Headhunters and recruitment agencies may not submit resumes/CVs through this Web site or directly to managers. Unity does not accept unsolicited headhunter and agency resumes. 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This assessment gives us an idea of your C++ skills- Companies that evaluate this skillset in interviews: Rockstar Games, Ubisoft, Mayhem Studios, etc.- 10 Multiple Choice questions- Average time to complete: 7 to 10 minutes

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