Android Developer (For independent contractors)

Booking.com; Amsterdam; On-site; EUR 90,000 - 130,000; Full time

Job summary

Booking.com is seeking an experienced software engineer to build robust applications using Kotlin and modern patterns. You will own components end-to-end, write clean, reusable code, and contribute to architecture discussions while ensuring quality and security across services.

Ideal candidates have 8-10 years of experience, strong communication skills, and a proactive, independent work style. You will collaborate with cross-functional teams to deliver scalable solutions for consumer-facing

Qualifications

• 8-10 years of experience in software development.
• Experience with consumer-facing mobile/web apps preferred.
• Strong communication and stakeholder management.
• Self-motivated with high agency and independence.

Responsibilities

• Build software applications using relevant development languages and knowledge of systems, services and tools.
• Write readable and reusable code using standard patterns and libraries.
• Refactor and simplify code by introducing design patterns when necessary.
• Ensure application quality by following standard testing techniques and the test strategy.
• Maintain data security, integrity and quality by following company standards and best practices.

Skills

Kotlin

Consumer-facing apps

Independent

Self starter

Communication skills

Job description

• Is responsible to build software applications by using relevant development languages and applying knowledge of systems, services and tools appropriate for the business area
• Is responsible to write readable and reusable code by applying standard patterns and using standard libraries
• Is responsible to refactor and simplify code by introducing design patterns when necessary
• Is responsible to ensure the quality of the application by following standard testing techniques and methods that adhere to the test strategy
• Is responsible to maintain data security, integrity and quality by effectively following company standards and best practices

Key Responsibilities

Building software applications

• Is responsible to build software applications by using relevant development languages and applying knowledge of systems, services and tools appropriate for the business area
• Is responsible to write readable and reusable code by applying standard patterns and using standard libraries
• Is responsible to refactor and simplify code by introducing design patterns when necessary
• Is responsible to ensure the quality of the application by following standard testing techniques and methods that adhere to the test strategy
• Is responsible to maintain data security, integrity and quality by effectively following company standards and best practices

End to End System Ownership

• Has sufficient knowledge to own a service end to end by actively monitoring application health and performance, setting and monitoring relevant metrics and act accordingly when violated
• Has sufficient knowledge to reduce risk and obtain customer feedback by using continuous delivery and experimentation frameworks
• Has sufficient knowledge to independently manage an application or service by working through deployment and operations in production

Software Systems Design

• Has sufficient knowledge to evaluate possible architecture solutions by taking into account cost, business requirements, technology requirements and emerging technologies
• Has sufficient knowledge to describe the implications of changing an existing system or adding a new system to a specific area, by having a broad, high-level understanding of the infrastructure and architecture of our systems
• Has sufficient knowledge to meet business needs by designing solutions that meet current requirements and are adaptable for future enhancements

Critical Thinking

• Is responsible to systematically identify patterns and underlying issues in complex situations, and to find solutions by applying logical and analytical thinking.

Requirements Of Special Knowledge/skills

• 8-10 years of experience
• Kotlin
• Has worked on consumer-facing apps in the past
• Independent
• Self starter, high agency
• Has great communication skills and able to communicate with the internal community and the stakeholder