Jobs Kotlin

N-iX is looking for a Lead/Senior Kotlin Engineer to join our team.

Our customer is a fintech company that provides flexible buy-now-pay-later solutions, enabling consumers to split purchases into transparent, interest-free, or interest-based payments. The customer's Platform team is responsible for managing critical services that are essential to the success and sustainability of the organisation. In simple terms, the team handles transactional communication send-outs to customers via email, SMS, and push notifications. These services demand attention to detail, proactive maintenance, and swift response times to ensure seamless operations. The recent high-priority initiatives include re-architecture/platform modernisation, high availability, and internationalisation efforts; these are vital for our organisation's growth and competitiveness in the market. These initiatives require dedicated expertise and resources to execute efficiently and effectively.

Main Responsibilities:

• Design and develop a robust and extensible Kotlin framework and platform.
• Own and deliver quarterly goals by leading engineers through ambiguity to solve open-ended problems while ensuring team support throughout delivery.
• Collaborate across the product development lifecycle with product management, design, and analytics to participate in ideation and articulate technical constraints.
• Drive decision-making and risk assessment by partnering on strategic technical choices that properly consider trade-offs and business impact.
• Proactively identify and resolve systemic issues across projects, processes, and technology, advocating for and leading the implementation of solutions.
• Ensure operational excellence and availability by creating and monitoring metrics, supporting "keep the lights on" efforts, and participating in an on-call rotation.
• Foster a culture of quality and ownership by setting high standards for code reviews and design, and advocating for best practices through technical writing and talks.
• Mentor engineering talent by providing actionable feedback, guidance, and leading by example to grow the team's capabilities.

Role Requirements:

• At least 5 years of proficiency in Kotlin with extensive experience designing, developing, and launching backend systems at scale
• Deep experience with distributed systems and high-availability architectures
• Experience in technical leadership in system design, with a proven ability to deliver significant features using elegant, simple, and extensible designs
• Strong infrastructure knowledge, including technologies such as AWS, MySQL/DynamoDB, and Kubernetes
• Proficiency in large-scale codebase management, utilizing a suite of tools and practices that ensure safe and efficient technical changes
• Experience in operational monitoring, including the use of metrics and tracing to maintain system health
• Excellent collaboration skills for effective partnership with global, cross-functional engineering teams
• Well spoken and written knowledge of the English language (C1)

Code&Care — is a successful full-stack development company, which provides clients with high-quality development assistance worldwide.

We are looking for a proactive Junior Software Engineer with a solid programming foundation, hands-on experience with mobile development, and an interest in AI-first development. Commercial experience, internships, and strong personal projects are welcome.

Tech Stack: Swift / SwiftUI, Kotlin / Jetpack Compose, JavaScript / TypeScript, Node.js, SQLite.

Requirements

• Practical experience with Swift/SwiftUI or Kotlin/Jetpack Compose and basic knowledge of at least one additional language.
• At least one working project you can demonstrate and explain.
• Understanding of programming fundamentals, REST APIs, JSON, SQL, and Git.
• Experience using AI tools to generate, debug, and improve code, with the ability to understand and verify the results.
• Willingness to learn new technologies and work with mobile and backend code.
• English: Intermediate (B1) or higher.

Responsibilities

• Fix bugs and implement new features in existing iOS and Android applications.
• Make changes to the Node.js backend and work with APIs and SQLite.
• Integrate speech recognition, OCR, and text-to-speech solutions.
• Test changes and help prepare builds and releases.
• Gradually contribute to prototyping and developing a native multiplayer RPG.

Nice to Have

Experience with both mobile platforms, backend development, AI integrations, Docker, CI/CD, or game development is a plus, but not required.

A large-scale consumer mobile application with millions of active users required a robust testing strategy to ensure stability, performance, and seamless user experience. Testing efforts focused on both iOS and Android platforms, covering functional validation, UI/UX consistency, geolocation features, and real-time interactions.

Responsibilities

• Contribute as a key member of a world-class Android Engineering and QA Automation team.
• Design, implement, and maintain automated test cases and frameworks in Kotlin, JUnit, Espresso.
• Own the quality lifecycle: identify issues, file and track bugs in Qase(or similar systems), and drive them to resolution
• Collaborate closely with Android engineers to ensure application code is testable and automation-friendly.
• Build and maintain in-house tools for test parallelization, network mocking, and custom reporting.
• Perform peer code reviews, ensuring robust test coverage and reliable CI pipelines.
• Drive improvements to the CI/CD ecosystem, ensuring scalability, maintainability, and speed of test execution.
• Explore and integrate AI-assisted development approaches to enhance test generation, workflow optimization, and CI/CD practices.
• Actively participate in Agile ceremonies – daily standups, sprint planning, retrospectives, and showcases.

Skills Required

• 2+ years of experience as an SDET, QA Automation Engineer, or related role, with a strong focus on Android application testing.
• Proficient in Kotlin and the Android SDK, with strong debugging and troubleshooting skills.
• Hands-on experience with JUnit, Espresso and UI automation.
• Experience with dependency injection frameworks (Dagger/Hilt) and API testing using Retrofit.
• Familiarity with Jetpack libraries and modern Android development best practices.
• Strong experience with Git/GitHub, familiar with both Gitflow and trunk-based development.
• Knowledge of SOLID principles and ability to apply them in test framework design.
• Ability to apply or readiness to adopt AI-driven testing practices, including test generation and workflow automation.
• Strong English communication skills