Role Description The Marketing Backend Team owns the email platform that is critical for the company's business: - Marketing and transactional mass mailings - Password recovery and account access emails - LLM-driven prioritization that improves email relevance and conversion Qualifications - 3+ years of experience in Quality Assurance, including experience in a Middle QA Engineer role - Strong experience with API testing, including REST API, gRPC, Kafka, and PostgreSQL - Experience in test automation, primarily for APIs, with some UI automation using Python, Pytest, Playwright, and GitLab CI - Strong proficiency with browser DevTools - Experience using AI tools to improve testing and engineering workflows - Strong debugging skills, including defect investigation, localization, and reproduction - Experience with integration testing Benefits - A fully flexible work schedule — there’s no pressure to start work at exactly 9:00 AM; what matters is achieving results and moving forward - Each person in our team is encouraged to choose their preferred work format: fully remote, in-office, or hybrid - An ambitious and supportive team who love what they do, appreciate each other, and grow together - Priority on the growth and development of each employee with internal programs for adaptation, training, soft skills, and leadership development tailored individually - Partial compensation for employees participating in external training and conferences - Support for employees' language learning goals with group and individual lessons, plus speaking clubs with colleagues from around the world - Corporate prices on hotels and other travel services to encourage travel - Commitment to overall health and work-life balance with MyTime Day Off - an extra day off for personal matters

Role Description Proctors are the frontline of the Duolingo English Test's security and integrity operation. As a Proctor, you are the first human to evaluate each test session after it is submitted. You review recorded video sessions asynchronously, analyzing test taker behavior, verifying identity compliance, and flagging violations so that each test is processed accurately and within the 48-hour SLA. This role operates within a structured review pipeline. Complex or borderline cases route to secondary review for final adjudication. Your role is to handle the full breadth of the standard queue with speed, consistency, and sound judgment. You will... - Review recorded DET sessions end-to-end, including the onboarding phase (room scan, ear scan, secondary camera) and the main exam. - Document where potential infractions appear within each session. - Make accurate, evidence-based validity decisions within the expected team review-time range. - Escalate sessions that require secondary review or internal hold according to protocol. - Complete monthly calibration sets used to measure decision accuracy against expert ground truth. - Participate in general and role-specific training modules as released. - Attend monthly remote calibration and team meetings, typically fewer than three per month. - Log time accurately against activity codes through a third-party platform. - Communicate blockers and issues to leads promptly. - Adapt quickly to process changes in a fast-paced remote environment. - Provide meaningful feedback on new and existing processes. Qualifications - Expert English fluency. - Experience in language evaluation, teaching, or test proctoring, including one or more of the following: - a TEFL, TESOL, or ESL certificate (120-hour minimum) plus 2+ years of applied ESL experience - a BA or MA in Linguistics, TESOL, or Education - a BA or MA in a related field with experience in assessment and teaching - Ability to read and interpret gestures, facial expressions, and behavioral cues from video. - Strong attention to detail and the ability to make consistent, evidence-based decisions. - Excellent critical thinking skills and comfort working through ambiguity and edge cases. - Ability to adapt quickly to process changes in a fast-paced remote environment. - A private and secure computer or laptop; tablets and mobile devices are not permitted for this work. - Reliable high-speed internet with at least 100 Mbps download and upload speeds. - Proficiency in Google Workspace (Docs, Sheets, Slides) and Slack. - Availability to work weekends. Exceptional candidates will have... - Experience with ticketing tools such as Zendesk, Jira, or Clearfeed. - Fluency in Mandarin, Arabic, or an Indian language. - Prior experience with asynchronous or remote proctoring platforms. - Experience with online test security or fraud detection. Company Description Duolingo is proud to be an Equal Employment Opportunity employer. We do not discriminate based upon race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics. By applying for this position your data will be processed as per the Duolingo Applicant Privacy Notice.

• Participate in project team meetings • Assess requirements or features, identify areas to test • Create testing plans • Write clear test scripts • Execute test scripts • Log issues and testing results in a test management system • Work through all Phases of Testing - (Functional, System, Integration and User Acceptance) on a project • Publish test status reports • Provide input of functionality to project team during project lifecycle • Interact, communicate and follow through with development & customer teams throughout testing phase • Learn new solutions, clouds, and testing platforms • Assist customer in UAT as needed

Role Description We're looking for a Back-End Engineer to help build the next generation of Congrify & IXOPAY's AI Payments Intelligence platform. In this role, you'll design and develop the backend services and data infrastructure that power AI-driven insights, analytics, and payment optimization. Working closely with Product, Data Science, and Engineering teams, you'll build scalable systems that help enterprise merchants improve payment performance, reduce costs, and make smarter decisions using their payment data. This is a hands-on engineering role with significant ownership and the opportunity to influence both technical architecture and product direction. - Design, build, and maintain scalable backend services for our AI Payments Intelligence platform. - Develop data pipelines, ETL processes, and cloud-native infrastructure that process large volumes of payment transaction data. - Build the backend services that power analytics, dashboards, AI-driven insights, and customer-facing reporting. - Collaborate with enterprise customers to integrate payment data from PSPs, acquirers, and other external systems. - Develop secure, reliable APIs and integration services for payment gateways, reporting APIs, webhooks, and other data sources. - Optimize backend systems for performance, scalability, security, and high availability. - Partner with Product, Data Science, and Engineering teams to design new platform capabilities and contribute to architectural decisions. - Stay current with emerging technologies and contribute to engineering best practices across the platform. Qualifications - 3+ years of experience in backend software engineering, data engineering, or database development. - Strong Python development experience building scalable backend applications and data processing systems. - Hands-on experience with AWS services, including S3, Lambda, DynamoDB, Cognito, SQS, and related cloud technologies. - Experience designing and maintaining data pipelines and cloud-native architectures. - Strong problem-solving skills and the ability to work independently in a collaborative, agile environment. - Excellent communication skills and attention to detail. Benefits - Experience with payment data analytics, payment gateways, PSP integrations, or FinTech platforms. - Experience with analytical databases such as ClickHouse or Snowflake. - Experience building AI or machine learning infrastructure and supporting analytics platforms. - Previous experience working in a startup or high-growth technology company. - This is a remote-friendly position. We welcome applications from candidates based in Germany or Italy. You'll have the flexibility to work remotely and visit our Munich office a few times during the year. Company Description Congrify Payments intelligence (an Ixopay Company) focuses on payments observability and intelligence as part of Ixopay, a payments orchestration, tokenization and intelligence provider. Our no-code platform consolidates data from various payment sources, providing businesses with the tools to effectively reconcile, monitor, and analyze their payment data.