Senior Software Development Engineer - Global E-commerce

Responsibilities

The e-commerce industry has seen tremendous growth in recent years and has become a hotly contested space amongst leading internet companies. With millions of loyal users globally, we believe Tik Tok is an ideal platform to deliver a brand new and better e-commerce experience to our users. Our quality assurance engineering team is responsible for keeping an e-commerce ecosystem stable, secure, and intuitive for our users.

We are looking for passionate and talented people to join us as we drive the future of e-commerce here at Tik Tok.

Role Overview:

We are developing a software quality platform that applies AI to strengthen how code changes are reviewed, tested, and validated before reaching production.

The objective is to improve correctness and reliability by:

• Applying AI-assisted review and analysis to code changes;
• Generating realistic synthetic test data;
• Enforcing clear quality gates across different testing stages;
• Reducing regressions and increasing confidence in production deployments.

This role focuses on designing and implementing systems that enable AI to support quality decisions, while deterministic checks and policies remain authoritative.

• Develop mechanisms for generating synthetic test data that reflect production structure, scale, and relationships without using real production data.
• Build AI-assisted systems for test generation across unit, integration, and end-to-end testing.
• Define and enforce expectations around correctness, regressions, and behavioral changes.
• Ensure AI-generated outputs are explainable, traceable, and safely bounded.
• Improve the reliability and signal quality of automated testing outcomes.

You will contribute to a platform where:

• Build and ingest synthetic test data mirrors production-like characteristics while remaining safe and compliant.
• AI powered system which makes code review, unit tests, integration tests and end to end testing easy and productive.
• Evaluate test results against consistent quality criteria before promotion to later environments in deployment pipelines.
• Failures are summarized and explained in a way that supports efficient resolution.

Minimum Qualifications:

• Full-stack development experience, with a strong emphasis on backend engineering, including designing and developing complex distributed systems, while also building and maintaining frontend components.
• Strong software engineering experience, with practical knowledge of applied AI technologies, such as prompt design, retrieval-augmented generation, model integration, and adaptation methods.
• Experience designing or maintaining synthetic test data for complex systems, including preserving structure, relationships, and edge cases at scale.
• Deep understanding of software quality practices and automated testing strategies across unit, integration, and end-to-end testing.
• Sound judgment in balancing automation, safety, and correctness in production systems.

Preferred Qualifications:

• Experience with AI-assisted developer tools or automation systems.
• Familiarity with modeling real-world data characteristics.

Tik Tok is the leading destination for short-form mobile video. At Tik Tok, our mission is to inspire creativity and bring joy. Tik Tok's global headquarters are in Los Angeles and Singapore, and we also have offices in New York City, London, Dublin, Paris, Berlin, Dubai, Jakarta, Seoul, and Tokyo.

Inspiring creativity is at the core of Tik Tok's mission. Our innovative product is built to help people authentically express themselves, discover and connect – and our global, diverse teams make that possible. Together, we create value for our communities, inspire creativity and bring joy - a mission we work towards every day.

We strive to do great things with great people. We lead with curiosity, humility, and a desire to make impact in a rapidly growing tech company. Every challenge is an opportunity to learn and innovate as one team. We re resilient and embrace challenges as they come. By constantly iterating and fostering an "Always Day 1" mindset, we achieve meaningful breakthroughs for ourselves, our company, and our users.

When we create and grow together, the possibilities are limitless. Join us.

Tik Tok is committed to creating an inclusive space where employees are valued for their skills, experiences, and unique perspectives. Our platform connects people from across the globe and so does our workplace. At Tik Tok, our mission is to inspire creativity and bring joy. To achieve that goal, we are committed to celebrating our diverse voices and to creating an environment that reflects the many communities we reach.

We are passionate about this and hope you are too.

Tik Tok is committed to providing reasonable accommodations in our recruitment processes for candidates with disabilities, pregnancy, sincerely held religious beliefs or other reasons protected by applicable laws. If you need…