Jobs

adjoe is redefining the future of mobile ads. Powered by advanced AI, first-party data and world-class engineers, we’ve perfected the offerwall experience for monetizing and scaling app publishers with solutions like Playtime and Arcade – now the fastest growing rewarded advertising channel globally – driving incremental engagement, retention, and revenue. At the same time, we’re breaking into programmatic advertising with the intelligent bidding system of adjoe Ads. Together, this ecosystem connects app developers to over 600 million users worldwide for scalable growth. Backed by a $100 million investment from Bertelsmann and operating from offices in Hamburg, Boston, Singapore, and Tokyo, adjoe is defining the next stages of app and ad experience – right now. Join us.

We are looking for a Mid-Level QA Automation Engineer to join our UI-heavy Catalog team who takes personal ownership of product quality, ensuring that every solution we deliver is stable, performant, and backed by clear documentation. Your expertise will allow you to navigate complex systems and predict potential points of failure, ensuring we consistently deliver the rigorous, high-quality results our top partners depend on.

What you will do:

• Full-Stack Automation: Develop and maintain end-to-end test suites using Playwright (TypeScript) that cover both complex UI interactions and the underlying API logic.


• API Rigor: Design and execute sophisticated API tests (integration and contract testing) to validate request/response payloads, status codes, and data consistency across our microservices.


• Utilize AI tools to speed up test script authoring, generate synthetic test data, and implement self-healing UI tests.


• Ensure the Offerwall renders perfectly in various web-views and mobile browsers, using visual regression tools to catch UI regressions.


• Verify that frontend actions correctly reflect in our datastores (DynamoDB, Redis, MySQL) by querying databases directly within your test scripts.


• Own the quality gate in our pipeline, ensuring that both UI and API tests provide fast, reliable feedback to the engineering team


• Test and validate the JS-to-Native bridge, ensuring that Offerwall interactions correctly trigger SDK events (e.g., completions, reward pings, and user attribution).


• Design and implement automated testing solutions and coordinate with the infrastructure team to integrate them into the CI/CD build pipeline.


• Go beyond explicit requirements. You will monitor system behavior, including network transfer rates, file size optimization, and database architecture efficiency.


• Take an active role in sprint and release planning. You will highlight missing requirements and identify potential architectural risks early in the lifecycle.


• Maintain a deep understanding of adjoe’s busiess model and the mobile advertising industry at large.

Who you are

• You have 3+ years of experience in QA Automation, with professional-grade proficiency in Playwright and TypeScript/JavaScript.


• You are "fluent" in HTTP. You have extensive experience testing RESTful APIs using tools like Postman, Insomnia, or Playwright’s native API testing capabilities, and you understand how to mock/stub dependencies.


• You don’t just test the "happy path." You look for edge cases in API error handling, latency issues, and complex state changes.


• You actively use AI coding assistants to write cleaner, more efficient test code and stay updated on AI-led QA trends.


• You have extensive experience designing automated tests using frameworks like Testmo, or Playwright, and you are comfortable working with APIs and datastores like MySQL, DynamoDB, and Redis.


• You can translate complex technical bugs into actionable feedback for developers and stakeholders alike, both in writing and in person.


• You naturally probe for what might go wrong. You accurately gauge risks and prioritize issues based on their impact on the business and the user.


• You thrive when imposing order on a team’s workflow, from structuring test plans to ensuring that documentation is comprehensive and accurate.


• You understand the mobile ad-tech industry and adjoe’s business model, allowing you to contribute meaningfully to product strategy.

Fuel for the Journey: Benefits to Support Your Ambitions

• Invest in Your Future: Regular feedback and our development program support your growth, helping you expand your skill set and achieve your career goals.


• Easy Arrival to adjoe: From signing to settling in Hamburg, we’ve got you covered. Need a visa? No problem. Ready to build your new life and career at adjoe in Hamburg? We support every ambition—from learning German to a relocation bonus that helps you make Hamburg feel like home.


• Live Your Best Life, at Work and Beyond: We work in a hybrid setup with core office days on Monday, Tuesday, and Thursday, plus flexible working hours. Enjoy 30 vacation days, 3 weeks of remote work per year, and free access to an in-house gym with lots of different fitness classes and mental health support through our Employee Assistance Program (EAP).


• Thrive Where You Work: Enjoy the Alster lake view from our central office with top-notch equipment, fun open spaces, and a large variety of snacks and drinks.


• Join the Community! Participate in regular team and company events, including hackathons and social gatherings. We work together, and we celebrate together, too.

Our mission is to create an inspiring work environment for amazing people to achieve extraordinary things. Be part of it!

Skip writing cover letters. Tell us about your most passionate personal project, your desired salary, and your earliest possible start date. We are looking forward to your application!

We welcome applications from people who will contribute to the diversity of our company.

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Don’t Just Find Bugs. Build the Shield.

At etalytics, we develop AI-powered energy management solutions that help industrial companies reduce energy consumption, costs, and CO₂ emissions. Our software platform etaONE® connects complex energy systems, analyzes data in real time, and unlocks efficiency potential through intelligent optimization.

Join the revolution in AI-driven energy intelligence! As a working Student, you won’t just test software: you’ll help ensure the reliability of a sophisticated IoT/AI platform used in real industrial environments. If you’re someone who hates doing things twice and loves automating everything, this is your chance to dive deep into a complex product and build your own testing tools with real impact.

Hours: 14-20 per week

Location: Darmstadt, Germany

Tasks

• Drive Automation: You won’t just run manual tests; you’ll help us build and scale a world-class automation framework using Playwright, TypeScript, and Jest.


• Creative Engineering: Take charge of our unique Python-ffmpeg pipeline to automatically generate platform visuals, turning code into automated user documentation.


• Deep-Dive Testing: Support the entire lifecycle by performing functional, regression, and performance testing to ensure our AI energy insights are always spot-on.


• Collaborate as a Peer: Work closely with developers and product managers. We’re not looking for someone who simply agrees. We value people who contribute their own ideas to improve the product.

Requirements

• The Mindset: You are a self-taught problem solver. You don’t wait for a ticket to be assigned; you see a gap and fill it. You enjoy the 'detective work' of finding out why something broke.


• The Context: You are currently studying Computer Science, Engineering, or a related field and are looking for an internship (full-time, 3 months).


• The Skills: You have foundations in JavaScript/TypeScript and are comfortable working in an IDE and a general development environment. Python and basic Git knowledge are a significant plus.


• Languages: You are fluent in English (written and spoken); German is a plus.

Benefits

• Purpose-driven work: Support industrial companies in becoming more efficient and sustainable


• Flexibility: Hybrid working with home office options and flexible working hours


• Team spirit: A supportive, collaborative environment with plenty of room for exchange and cooperation


• Community: Regular team events and shared activities


• Excellent development opportunities and a high level of personal responsibility in a growing team

Our office is located in Darmstadt near Frankfurt am Main, conveniently located with good connections to public transport, the motorway, and the airport. Become part of a highly motivated, international team!

Ready to make an impact?

Send us your CV (PDF) together with your earliest possible start date.

We can’t wait to meet you and shape the future of energy together!

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mika is revolutionizing financial management for small businesses with an AI-powered platform that combines automated accounting, proactive insights, and conversational AI. We're on a mission to make expert financial navigation and compliance accessible to every small business owner – dramatically reducing costs and bureaucratic burden. We're a small, senior team shipping fast, and every line of code we ship matters.

Our stack: FastAPI & Django backend, React frontend (Material UI, react-query), PostgreSQL, AWS.

Tasks

We build agentic AI systems that do real accounting work. As our product grows in complexity, so does the need to deeply understand and validate what our AI agents actually do – how they book transactions, why they made certain decisions, and whether the output meets real accounting standards.

This is not a traditional QA role. You'll work closely with the product and engineering team to test new features, investigate edge cases, and build up our QA processes from the ground up. Over time, you'll grow into owning automated testing (E2E) and eventually supporting compliance and certification work.

Concretely, you'll:

• Manually test new features and document findings clearly.


• Clone local environments and run our AI agents to validate their bookkeeping output.


• Develop a deep understanding of German accounting logic to judge whether agent decisions are correct.


• Collaborate with our customer success team and accountants to identify real-world edge cases.


• Gradually build out E2E testing infrastructure (e.g. Playwright).


• Help establish structured QA processes across the team.

Requirements

• Technical Foundation: You have practical programming experience (in any language) and a dedicated commitment to continuously developing your technical skill set.


• Analytical Mindset: You possess a strong desire to learn and the ability to acquire deep domain expertise in complex subject areas.


• Methodical Approach: You demonstrate structured thinking and ensure thorough documentation of your findings through a systematic workflow.


• Independent Ownership: You are comfortable working autonomously and are proactive in flagging and communicating issues clearly and effectively.

Nice to have:

• Initial experience with automated testing tools such as Playwright, Cypress, or similar frameworks.


• A background or professional interest in accounting, finance, or taxation.


• Prior experience or academic focus in software development.

Benefits

• A small team of strong, senior engineers who respect each other's time.


• Real ownership from day one – your findings directly shape the product.


• A genuinely interesting domain – German tax law meets AI agents.


• A clear growth path: from manual testing to E2E automation, compliance support, and eventually real software contributions – long-term, this role can grow into a full engineering position.


• Almost no meetings – on average 95% focus time per day.


• Berlin location preferred but remote within Germany possible.

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Job Description

Housing is more than square meters. It’s home, security, and future.

Our mission is to enable more people in Germany to have a place to call home - faster, easier, and smarter. With our SaaS solution, we make modernization not only more efficient but possible in the first place.

And this is where you come in:

You take ownership of our test architecture and help shape how we ensure quality - evolving from a setup with around 50% manual testing toward a fast-moving, AI-driven world of automated testing.

If this idea motivates you and you want to be part of something that truly makes a difference, then we would like to apply to you.

What we offer

Remote. Work from anywhere in the EU.

Working hours. Highly flexible. You should be available during core working hours.

Unlimited vacation. Yes, really- just align with your team.

Travel opportunities. Work fully remotely during longer trips, as long as you have a stable internet connection.

Equipment. A notebook will find its way to you.

Salary. We work with a salary band and remain flexible depending on your experience.

Salary development. Annual growth based on inflation, company performance, and your individual contribution.

Culture. Collaborative, fair, and open. We create a safe environment where everyone can share knowledge, opinions, and ideas. Our team consists of more than 20 employees from seven different countries.

Product. A unique SaaS product that has already facilitated over €1 billion in construction volume.

Customers. Companies in the housing industry that own or manage more than 1,000 residential units.

Digital. We love it. Processes and documentation - everything is digital. Using AI is a thing for us.

Software. Confluence, Jira, Slack, Miro, ReactJS, AWS, Golang, Docker, Cucumber, Cypress, X-Ray.

Politics. None. We value independent thinking and decision-making.

Stability. We are profitable with an outstanding USP in the market and operate within a corporate group.

Start. Immediately or whenever it works best for you. We are not in a hurry; the right person is more important.

Benefits. JobRad, team events, drinks, healthy snacks, BVG ticket subsidy, and two office dogs - these benefits are primarily available to our Berlin-based team members. Please let us know what we can do for you.

Your mission

Ensure software quality through manual testing and shape the future of optimized AI-driven automated tests.

You start with a lot of learning about our SaaS solution and do manual testing. Then you start to design, implement, and maintain end-to-end automated tests. Your goal is to create smart, stable, and scalable test automation.

Shape test strategy and architecture.

You perform exploratory, regression, and acceptance testing. You support release testing and final validations, ensuring every feature is production-ready.

Collaborate and optimize processes across teams.

You will work closely with key account management, customer support, product development, and our IT team and take ownership of test architecture, together with your team lead.

What you should bring

Experience. At least 3 years of experience in E2E testing, test automation, and manual QA.

Perfectionist. You pay attention to the smallest details. Your attention to detail occasionally drives others a little crazy.

Software Knowledge. Cypress or Playwright and Git - we are using Cypress with X-Ray/Cucumber on top for test management.

Nice to have. CI tools like GitHub Actions. Hands-on experience with Docker. Knowledge in modern frontend technologies like ReactJS/TypeScript/HTML/CSS.

Languages. English is required. German is a plus, but not mandatory.

Remote work discipline. You stay focused and productive, even if the fridge, friends, or the fantastic weather is calling you.

About Doozer

is a collaborative, fair, and family-friendly employer. We are a Berlin-based PropTech company with the mission to digitize the real estate industry. More than €1 billion in construction volume has already been processed through our platform.

If you share our passion for the digital transformation and enjoy working in an open and committed environment, we would love to hear from you.

Sounds interesting? Apply online now!

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Don’t Just Find Bugs. Build the Shield.

At etalytics, we develop AI-powered energy management solutions that help industrial companies reduce energy consumption, costs, and CO₂ emissions. Our software platform etaONE® connects complex energy systems, analyzes data in real time, and unlocks efficiency potential through intelligent optimization.

Join the revolution in AI-driven energy intelligence! As a QA Intern, you won’t just test software: you’ll help ensure the reliability of a sophisticated IoT/AI platform used in real industrial environments. If you’re someone who hates doing things twice and loves automating everything, this is your chance to dive deep into a complex product and build your own testing tools with real impact.

Tasks

• Drive Automation: You won’t just run manual tests; you’ll help us build and scale a world-class automation framework using Playwright, TypeScript, and Jest.


• Creative Engineering: Take charge of our unique Python-ffmpeg pipeline to automatically generate platform visuals, turning code into automated user documentation.


• Deep-Dive Testing: Support the entire lifecycle by performing functional, regression, and performance testing to ensure our AI energy insights are always spot-on.


• Collaborate as a Peer: Work closely with developers and product managers. We’re not looking for someone who simply agrees. We value people who contribute their own ideas to improve the product.

Requirements

• The Mindset: You are a self-taught problem solver. You don’t wait for a ticket to be assigned; you see a gap and fill it. You enjoy the 'detective work' of finding out why something broke.


• The Context: You are currently studying Computer Science, Engineering, or a related field and are looking for an internship (full-time, 3 months).


• The Skills: You have foundations in JavaScript/TypeScript and are comfortable working in an IDE and a general development environment. Python and basic Git knowledge are a significant plus.


• Languages: You are fluent in English (written and spoken); German is a plus.

Benefits

• Purpose-driven work: Support industrial companies in becoming more efficient and sustainable


• Flexibility: Hybrid working with home office options and flexible working hours


• Team spirit: A supportive, collaborative environment with plenty of room for exchange and cooperation


• Community: Regular team events and shared activities


• Excellent development opportunities and a high level of personal responsibility in a growing team

Our office is located in Darmstadt near Frankfurt am Main, conveniently located with good connections to public transport, the motorway, and the airport. Become part of a highly motivated, international team!

Ready to make an impact?

Send us your CV (PDF) together with your earliest possible start date.

We can’t wait to meet you and shape the future of energy together!

Find Jobs in Germany on Arbeitnow