Job Description
Job Description: We're seeking a
Senior Manager to join our fast-paced, experimentation-driven team. This role blends front-end engineering expertise with conversion-focused strategy to rapidly prototype, test, and deploy high-impact user experiences. You'll collaborate across disciplines-working closely with product managers, designers, back-end developers, and marketers-to deliver seamless, performant, and conversion-optimized features using platforms like Adobe Target or Optimizely.
What You'll Do - Build, inject, and manipulate front-end components using HTML, CSS, and JavaScript within CRO platforms (e.g., Adobe Target, Optimizely).
- Rapidly prototype and deploy A/B and multivariate tests across key user journeys.
- Collaborate with product managers, designers, back-end engineers, and marketers to define hypotheses, prioritize experiments, and ensure technical feasibility.
- Work in agile sprints to deliver high-velocity experimentation with minimal disruption to core codebases.
- Manage multiple concurrent projects with tight timelines, adapting quickly to shifting priorities and business needs.
- Maintain clean, modular, and reusable code for test variants and UI enhancements.
What You Bring - 4+ years of front-end or full-stack development experience, with at least 2 years in a CRO-focused role.
- Deep knowledge of JavaScript (vanilla and/or jQuery) , HTML5 , and CSS3 .
- Experience with CRO platforms like Adobe Target, Optimizely, or similar.
- Strong understanding of responsive design, accessibility, and cross-browser compatibility.
- Comfort working in sandboxed environments or via tag managers (e.g., Adobe Launch, GTM).
- Proven ability to juggle multiple projects and deliver under fast-paced, high-pressure conditions.
- A positive, can-do attitude and a proactive approach to problem-solving and collaboration.
- Excellent communication and collaboration skills across technical and non-technical teams.
Nice to Have - Familiarity with React, Vue, or other modern JS frameworks.
- Experience working in e-commerce, SaaS, or high-traffic consumer platforms.
- Understanding of performance optimization and front-end debugging tools.
Why Join Us? - High-impact role with direct influence on business KPIs.
- Work with a collaborative, cross-functional, and fast-moving team.
- Flexible work environment and strong support for professional growth.
The annual salary range for this position is ($78,000--$126,500). Placement within the salary range is based on a variety of factors, including relevant experience, knowledge, skills, and other factors permitted by law.
Benefits available with this position include:
• Medical, vision, and dental insurance,
• Life insurance,
• Short-term and long-term disability insurance,
• 401k,
• Flexible paid time off,
• At least 15 paid holidays per year,
• Paid sick and safe leave, and
• Paid parental leave.
Dentsu also complies with applicable state and local laws regarding employee leave benefits, including, but not limited to providing time off pursuant to the Colorado Healthy Families and Workplaces Act, in accordance with its plans and policies. For further details regarding Dentsu benefits, please visit
To begin the application process, please click on the "Apply" button at the top of this job posting. Applications will be reviewed on an ongoing basis, and qualified candidates will be contacted for next steps.
Location: New York
Brand: Dentsu X
Time Type: Full time
Contract Type: Permanent
Dentsu is committed to providing equal employment opportunities to all applicants and employees. We do this without regard to race, color, national origin, sex , sexual orientation, gender identity, age, pregnancy, childbirth or related medical conditions, ancestry, physical or mental disability, marital status, political affiliation, religious practices and observances, citizenship status, genetic information, veteran status, or any other basis protected under applicable federal, state, or local law.
Dentsu is committed to providing reasonable accommodation to, among others, individuals with disabilities and disabled veterans. If you need an accommodation because of a disability to search and apply for a career opportunity with us, please send an e-mail to ApplicantAccommodations@dentsu.com by clicking on the link to let us know the nature of your accommodation request and your contact information. We are here to support you.
Job Tags
Permanent employment, Full time, Contract work, Temporary work, Local area, Flexible hours, Shift work,