ABOUT THE ROLE Crossian is a technology-driven e-commerce business. Behind our success is our people. As a start-up formed in 2020, we have created a fast-paced and dynamic environment, enabling our people to reach a cumulative average growth rate of over 1000% in just under 3 years. At Crossian, our AI agent system automates the operational side of performance marketing. That changes what we need most from people. This is a senior individual-contributor role, not a people-management one: you lead through technical depth, not headcount. We're looking for someone who is expert at both performance marketing and creative development — the person who sets up the creative and UA systems the AI runs on, decides what "good" looks like, and solves the hard problems that don't have a playbook yet. You own strategy end-to-end, without a middle-management layer above you, and you use AI agents to turn that strategy into performance at scale. WHAT YOU WILL DO - Set the creative and UA strategy: define the angles, frameworks, and testing approach that drive results across app/game titles - Build the creative pipeline and workflows that AI agents run on — the logic, briefs, and quality standard behind them - Take on the hardest data problems: work out why performance drops, decide what to change, and turn funnel data (CTR, CR, CPM, CPI, ROAS...) into action - Come up with new creative concepts and content directions from market, competitor, and data insight - Own creative testing end-to-end: set the hypotheses, structure the tests, read the results, and turn wins into repeatable patterns - Run UA across major ad platforms (Applovin, Google Ads, Meta, TikTok, Mintegral, Affiliate, etc.), going deep on targeting, bidding, and scaling - Set how people and AI work together in the creative-to-campaign loop, and raise the team's technical level through the systems you build [Requirements] WHAT WE ARE LOOKING FOR - A bachelor's degree in Marketing, Data Analysis, Economics, or a related field. - A strong academic foundation in mathematics is a real plus — especially a track record of achievements or awards in math during your school years - Advanced English proficiency (equivalent to IELTS 7.0+) - 5+ years of strong proven experience in both performance marketing / UA for mobile apps or games - Background at a top-tier tech/e-commerce or gaming company is a plus. - Expert with ad platforms, performance metrics, and tracking/attribution - Expert in creative development: content components, brief and content-flow design, and building new angles from insight - Experience building or working closely with AI-driven marketing workflows or agents - A fast learner who adapts quickly as tools and platforms change - Strong analytical and problem-solving skills; Always testing, learning, and improving. WHAT YOU CAN EXPECT At Crossian, our people are the key to our success. We believe in creating an attractive total compensation package (TCP) that not only retains employees but allows them to excel in their profession. These include: - Total Compensation Package (Avg. 25 months/year): - Monthly Salary: Competitive and negotiable based on experience - Guaranteed Pay: 13th-month salary and 100% gross salary during probation. - Premium Global Health Insurance - Statutory contributions (SI, HI, UI) based on 100% of gross salary. - 5-day working per week (Monday to Friday) - 12 days of paid annual leave & 3 well-being off days - Training & Development Budget, including access to free Coursera courses. - A special scheme is offered to long-term employees (3-5 years of service) to extend this health package to your dependents/family - An annual 5-star events & Team Building Budget - Office Life: A well-stocked Pantry and a dedicated Crossian Café with free refreshments and goodies. - Other benefits fully comply with the Company's Policy and Vietnam Labor Laws.