Software Engineer II

Details

A Software Engineer II owns the execution of technical elements in the Booking.com technology stack, products, and processes. The role is responsible for implementing technical solutions based on business requirements, estimating effort and impact, and delivering high-quality, maintainable software. The engineer works with colleagues in other roles to design, prioritize, and implement technical tasks across product features, infrastructure automation, frameworks, tooling, and services.

Responsibilities

Building Software Applications

• Build software applications using relevant development languages and appropriate 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 through standard testing techniques and methods aligned with the test strategy.
• Maintain data security, integrity, and quality by following company standards and best practices.

End-to-End System Ownership

• Own services end to end by monitoring application health and performance, setting relevant metrics, and acting when they are violated.
• Reduce business continuity risks and bus factor through appropriate practices, tools, documentation, runbooks, and OpDocs.
• Reduce risk and obtain customer feedback through continuous delivery and experimentation frameworks.
• Independently manage applications or services through deployment and production operations.

Technical Incident Management

• Address and resolve live production issues while mitigating customer impact within SLA.
• Improve system reliability through root cause analysis and long-term solutions.
• Contribute to incident tracking and postmortem processes.

Architecture and Systems Design

• Advise product teams on technical solutions that meet functional, nonfunctional, and architectural requirements.
• Evaluate and align target architecture improvements and technical capabilities.
• Evaluate architecture solutions based on cost, business requirements, technology requirements, and emerging technologies.
• Design adaptable solutions that meet current and future business needs.
• Apply engineering techniques such as prototyping, spiking, and vendor evaluation.

Collaboration and Improvement

• Apply logical and analytical thinking to identify underlying issues and solve complex problems.
• Identify and implement process, system, and structural improvements.
• Communicate clearly with different audiences, actively listen, ask relevant questions, and work toward mutually agreeable solutions.

Requirements

Must-Have Skills

• Strong soft skills, including accountability, autonomy, and communication.
• Java.
• AWS.
• Experience with on-premises to AWS migrations.
• Kafka and Cassandra.
• Experience with AWS managed services, including DynamoDB, RDS, and Lambda.
• Understanding of best operations practices, including monitoring, alerting, and noise reduction.
• System design experience.

Nice-to-Have Skills

• JavaScript or TypeScript.
• Experience with Attractions or Tickets as a product.
• Experience with the architecture of new products.

Contract Details

• Independent contractor position.
• Duration: 6 months.
• Start date: November 16, 2026.
• End date: May 15, 2027.