Senior Software Engineer - Ads Creative (시니어 소프트웨어 엔지니어)

Confirmed live in the last 24 hours

Moloco

Seoul, Korea

On-site

Posted April 30, 2026

Job Description

About Moloco:

Moloco builds some of the most powerful AI advertising solutions in the world. Our name—short for "machine learning company"—reflects our core mission: democratizing access to the advanced AI that has historically been reserved for tech giants. Led by machine learning pioneers who built some of the most successful ad systems at Google, including YouTube's monetization engine and key search advertising technologies, we're transforming how businesses grow and compete in the digital economy.

Built with AI from day one, Moloco’s planet-scale machine learning platform powers a suite of solutions for advertising growth and monetization. Moloco Ads is an AI-powered platform that delivers real business outcomes for mobile app marketers through performance-based user acquisition. Moloco Commerce Media enables retailers and marketplaces to build revenue-generating ad businesses that balance user experience and advertiser performance.

Moloco is headquartered in Silicon Valley, with offices in Seattle, New York, San Francisco, Seoul, Beijing, Singapore, Gurgaon, Tokyo, Shanghai, London, Tel Aviv, and Berlin.

Moloco is a truly rewarding place to work and in an exciting period of growth, which you could be a part of. Join us today and apply now!

About the role

As a Senior Software Engineer on the Ads Creative team, you will lead the systems that power how creatives are ingested, processed, and delivered across Moloco Ads. Your work will directly impact ad performance, experimentation velocity, and the quality of creative experiences for advertisers and end users on a global scale.

What You Will Do

Lead the design and implementation of core backend services and pipelines for creative ingestion (images, video, HTML, etc.), validation, transformation, rendering, and delivery.
Act as technical lead on medium‑ to large‑scale projects, breaking down ambiguous creative requirements into clear technical designs, milestones, and execution plans.
Architect and evolve services that manage creative metadata, versioning, policy/quality checks, and runtime selection, ensuring high availability and low latency for online ad serving.
Collaborate closely with Product, Design, Ads Infrastructure, and Machine Learning teams to define how creative assets are prepared, scored, and experimented on to maximize advertiser performance.
Build and improve tooling and services that support creative A/B testing, dynamic templates, and performance analytics, enabling rapid iteration on creative strategies.
Work with data and infra partners to design reliable creative data pipelines, ensuring that logging, feature generation, and reporting around creatives are correct, timely, and cost‑efficient.
Drive engineering best practices in testing, observability, reliability, and on‑call operations for creative systems, and proactively address tech debt that limits future innovation.
Mentor and support junior engineers, providing design guidance, review, and context that help them grow their skills and impact.

Basic Qualifications

BS/MS in Computer Science or a related technical field, or equivalent practical experience.
8+ years of software engineering experience, with significant backend or platform experience in production systems.
Proficiency in one or more modern programming languages such as Java, Go, Kotlin, C++, or Python, and experience building large‑scale distributed systems or high‑throughput services.
Strong system design skills, with a track record of owning and leading complex services or features end‑to‑end, across multiple components or teams.
Deep experience designing, building, and operating web services / APIs and working with relational or NoSQL databases (e.g., MySQL, PostgreSQL, Bigtable, BigQuery).
Proven experience acting as a technical lead: scoping projects, defining technical approaches, coordinating with other engineers, and delivering on time with high quality.
Demonstrated ability to collaborate with cross‑functional partners (Product, Design, Data, ML, Operations) and to influence product and technical decisions.
Fluent verbal and written communication skills in English, including the ability to explain complex technical topics to diverse audiences.

Preferred Qualifications

Experience building systems for creative or media processing pipelines, such as ingestion, validation, transformation, optimization, or content moderation.
Experience with real‑time ad serving or recommendation systems, especially where creatives or assets are selected dynamically at runtime.
Familiarity with digital advertising / AdTech, including how creative quality and variation impact performance, experimentation, and advertiser outcomes.
Hands‑on experience with cloud and big‑data technologies (e.g., GCP, BigQuery, Dataflow, Kafka, Beam/Spark) and integrating them into production services.
Experience designing experiment and measurement frameworks for creatives (e.g., A/B tests, multi‑armed bandits, creative scoring/selection policies) in partnership with ML teams.
Experience applying or integrating GenAI or automation for creative transformation, auto‑generation, QA, or classification is a strong plus.
Track record of mentoring engineers, improving team‑wide engineering practices, and contributing to a positive, inclusive team culture.

Moloco Thrive: Benefits and Well-Being:

We take care of you and create the conditions for you to do the best work of your career. Through a lens of inclusion, we offer innovative benefits that empower our employees to take care of themselves and their families so they can do the best work of their lives.

Moloco Values:

Lead with Humility: Everyone’s voice is respected, valued, and heard. With humility, we become more open and accessible to each other. We win, lose, and learn together. Accountability and feedback are essential to our success.
Uncapped Growth Mindset: We see all situations as opportunities to learn, grow, and improve as individuals and as an organization. We seek diverse perspectives, encourage curiosity, and promote experimentation to push the boundaries of what’s possible.
Create Real Value: We pursue the most impactful opportunities with rigor and integrity. We take intelligent risks and make disciplined trade-offs to maintain deep focus. We help our customers win by delivering durable value.
Go Further Together: We’re one team working towards one mission and vision. We collaborate proactively and inclusively, involving the right people at the right time and in the right way. We strive to create a more equitable workplace. We won’t let each other fail.

Additional Resources:

AI Use in Interviews

Our interview process is designed to get to know the real you. Unless a round specifically includes AI as part of what's being assessed, we ask that candidates engage without AI assistance. Please review our AI Use in Interviews Policy before your interview to understand what to expect. Failure to comply with this policy may impact your candidacy.

Equal Opportunity:

Creating a diverse workforce and a culture of inclusion and belonging is core to our existence. To reach our goals, diversity of talent and thought is a critical component of how we operate as an organization. Our workforce is our superpower, and we know that fostering a culture of inclusion, authenticity, and belonging gives us the greatest opportunity to achieve our vision to become the scaling engine for the Internet economy.

Moloco is an equal opportunity employer. We highly value diversity in our current and future employees and do not discriminate (including in our hiring and promotion practices) on the basis of race, color, creed, religion, national origin, age, sex and gender, gender expression and identity, sexual orientation, marital status, ancestry, physical or mental disability, military or veteran status, or any other characteristic protected by law.

Candidate Privacy Notice:

Your privacy matters to us. By applying, you acknowledge that you’ve reviewed our Candidate Privacy Notice.

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