• Define and evolve the mobile architecture strategy for both iOS (Swift) and Android (Kotlin) platforms, ensuring scalability, performance, and maintainability • Lead technical decision-making on cross-platform consistency, shared design patterns (MVVM, MVI, Clean Architecture), and platform-specific optimizations • Design and develop critical native features in iOS (Swift, SwiftUI) and/or Android (Kotlin, Jetpack Compose), including secure authentication flows (Auth0, OAuth2) and cloud service integrations • Mentor and upskill senior and mid-level mobile engineers through code reviews, design reviews, architecture discussions, and pair programming • Establish and enforce mobile engineering standards: code quality, testing strategies (unit, UI, integration), security practices (Keychain, secure storage, certificate pinning), and CI/CD best practices • Drive adoption of automated testing frameworks (XCTest, JUnit, Espresso, Compose UI tests) and mobile observability tools (Firebase Crashlytics, analytics platforms) • Collaborate closely with Product, UX, Backend, and DevOps teams to align mobile technical roadmap with business priorities and ensure seamless API integrations • Unblock complex technical challenges, conduct root cause analysis for production issues, and champion continuous improvement across mobile platforms

Role Description - Evaluate technical tasks in Scala, Kotlin, or OCaml against real-world professional standards. - Review intricate code-level situations and provide precise, structured written assessments. - Work inside containerized repositories using Docker to run and interpret programmatic and CI-style checks. - Provide clear written rationales explaining expert judgments. - Complete well-defined, time-bounded tasks with explicit evaluation criteria. Qualifications - 5+ years of professional software engineering in Scala, Kotlin, or OCaml. - Comfort working in Docker/CI-based repo environments. - Ability to articulate clearly why code is correct or idiomatic in writing. Requirements - Engineers from top product, data, or research engineering backgrounds. Benefits - Hourly contractor compensation: $120–200/hour. - Remote work opportunity. - Commitment of 20–40 hours/week. Application Process - Upload resume. - AI interview based on your resume. - Submit form. Resources & Support - For details about the interview process and platform information, please check: Interview Process . - For any help or support, reach out to: support@mercor.com .

Role Description We are expanding our team of Mobile software developers and we are looking for bright people who enjoy dynamics and are eager to learn and develop their professional skills. You will have the opportunity for fully remote or hybrid work (remote and in the office in Sofia). As a Kotlin Multiplatform Developer, you’ll be: - Working in a supportive environment on projects for international clients - Participating across diverse domains and tech stacks, covering the full software development lifecycle (feature development, maintenance, troubleshooting, testing, documentation, etc.) - Collaborating with developers of various seniority levels to analyze requirements, propose architecture and system design solutions, and estimate and plan tasks - Communicating effectively with team members and clients regarding tasks, requirements, and issues - Continuously learning new technologies, taking part in knowledge-sharing initiatives (e.g. internal trainings), and pursuing professional certifications Qualifications - Solid understanding of Swift or Kotlin - Experience building native UI for iOS (SwiftUI, UIKit) or Android (Jetpack Compose, XML) - Understanding of mobile architectural patterns such as MVVM, MVI, or MVC - Familiarity with local data persistence (Room, Core Data, SwiftData, SQLite, or Realm) - Genuine interest in cross-platform mobile development and working within a Kotlin Multiplatform (KMP) architecture - Fluency in English Requirements - Experience with Kotlin Multiplatform (KMP) will be considered an advantage - Familiarity with Objective-C and/or Java - Exposure to React Native, Flutter, or other cross-platform frameworks - Familiarity with testing, CI/CD, and distribution tooling (TestFlight, Firebase App Distribution, Play Console) and App Store / Google Play publishing processes

Role Description We are looking for an experienced and passionate German Language Trainer to teach and guide students/professionals in developing their German language skills. The ideal candidate should have strong linguistic expertise, excellent communication skills, and the ability to create an engaging learning environment. - Conduct German language training sessions for beginners, intermediate, or advanced learners. - Develop lesson plans, instructional materials, and interactive activities. - Assess students' language proficiency and track progress through evaluations. - Provide personalized coaching and support to improve students' speaking, listening, reading, and writing skills. - Teach grammar, vocabulary, pronunciation, and cultural aspects of the German language. - Use innovative teaching methods, including digital tools, role-plays, and real-life scenarios. - Prepare students for language certification exams (Goethe, TELC, TestDaF, etc.) if required. - Collaborate with other trainers or team members to improve training effectiveness. - Stay updated with the latest teaching methodologies and German language trends. Qualifications - Bachelor's or Master’s degree in German Language, Linguistics, or a related field (preferred). - German language proficiency (minimum B2 or C1 level) certified by Goethe, TELC, TestDaF, or equivalent. - Prior experience as a German language trainer, tutor, or instructor. - Strong interpersonal and communication skills. - Ability to teach diverse groups of learners (students, professionals, corporate employees, etc.). - Knowledge of online teaching platforms (Zoom, Google Meet, LMS, etc.) is a plus. - Passion for teaching and helping learners succeed. Benefits - Competitive salary and performance incentives. - Opportunity to work in a multicultural environment. - Flexible working hours (for freelance/remote positions). - Career growth and professional development opportunities.