Full Stack Engineer, Backend

Who We Are 

At Moxxi, we’re redefining performance marketing with cutting-edge technology and a relentless focus on results. As a profitable, bootstrapped start-up, we are led by a team of industry veterans in performance marketing, ad tech, and digital publishing. Together, we’re building the premier platform to incubate, scale, and optimize digitally born businesses, setting new standards for data-driven success. 

Our entrepreneurial team brings proven experience from both global corporations and fast-growing startups. We’re passionate about delivering scalable, profitable outcomes for our partners through advanced profiling, targeting, and continuous optimization. Joining Moxxi means becoming part of a growing start-up in the heart of NYC, where you’ll have the opportunity to accelerate your career, expand your skill set, and shape the future of performance marketing. 

The Role:

As a Full Stack Engineer at Moxxi, you will play a key role in building and scaling our performance marketing platform from backend APIs and data services to intuitive, data-rich front-end experiences. You will collaborate closely with product, design, and business stakeholders to create tools that help Ad operators manage, optimize, and personalize campaigns in real time. This is a front-end leaning full-stack role where you will own features end-to-end, contribute to technical strategy, and help shape the evolution of Moxxi’s ad delivery and optimization systems. If you thrive in fast-moving environments, love solving complex technical problems, and want to see your code drive measurable business impact, this is the role for you.

Responsibilities:

• Design, build, and maintain data-rich, low-latency, performant web applications using TypeScript, React, and Next.js.
• Develop reusable, responsive UI components and design systems that scale across Moxxi’s performance marketing tools and dashboards.
• Collaborate with product and design teams to translate complex workflows into intuitive, elegant interfaces.
• Build and maintain backend APIs and services (primarily in Go) that support front-end features and integrations.
• Work closely with backend and data engineers to deliver campaign analytics, reporting, and personalization features.
• Implement robust testing, monitoring, and performance optimization practices for frontend and API layers.
• Contribute to architecture discussions, technical design, and system scalability planning.
• Ensure code quality, maintainability, and accessibility across all user-facing surfaces.
• Mentor and support junior engineers through code reviews and pair programming.
• Collaborate cross-functionally with product, design, and operations teams to deliver impactful, user-centered solutions.
• Stay current with trends in frontend frameworks, cloud-native systems, and AdTech innovation, bringing fresh ideas into Moxxi’s platform.

Basic Qualifications:

• 6–10 years of professional software engineering experience, including 4+ years building production-grade frontends.
• Strong fluency in TypeScript, React, and modern frameworks like Next.js.
• Solid backend experience with Go (Golang), Node.js, or Python, and familiarity with RESTful or GraphQL APIs.
• Strong understanding of state management, component architecture, and API design.
• Experience integrating with cloud-native environments (GCP preferred) and containerized deployments (Docker, Kubernetes).
• Knowledge of SQL/NoSQL databases and basic data pipeline concepts.
• Excellent product sense and ability to translate business needs into clean, maintainable solutions.

Nice to Have / Bonus Qualifications:

• Experience in AdTech, MarTech, or marketing analytics platforms.
• Background in data visualization or interactive analytics using tools like D3.js or Recharts.
• Familiarity with AI/ML-driven personalization, A/B testing frameworks, or campaign experimentation systems.
• Experience building and maintaining design systems or component libraries.
• Familiarity with performance optimization techniques (lazy loading, bundle analysis, caching).

Moxxi Values & Competencies:

• Self-Starter – You take initiative and solve problems before they become problems.
• Curious & Analytical – You ask why, dig deep into data, and experiment to learn what works.
• Efficiency-Oriented – Fast, focused, and action-driven.
• Relationship-Focused – You build trust and deliver value.
• Organized Multitasker – You thrive in fast-paced, high-velocity environments.
• Strategic Communicator – You translate performance into insight and insight into action.