Full Stack Software Engineer

Fullstack Software Engineer – Growth & Subscriptions

Location: NYC / Hybrid

Soni's client is a fast-growing technology company building tools that connect real-world interactions with digital experiences. Their platform helps businesses engage users through interactive touchpoints, data-driven insights, and customizable experiences. They work with well-known brands across multiple industries and are backed by leading investors.

Their mission: make it easy for people to move seamlessly between the physical and digital world.

We’re looking for a Fullstack Software Engineer to help build and evolve core product features focused on user activation, subscription workflows, and growth-oriented experiences. You’ll work across the stack, contributing to both backend services and frontend applications that directly impact how users discover, adopt, and upgrade our platform.

You’ll join a small, collaborative team and take ownership of meaningful features, from design through production. This role is ideal for an engineer who enjoys building product-facing systems, learning from more experienced teammates, and growing their technical scope over time.

• Design, build, and maintain features across modern frontend frameworks and backend services.
• Own smaller to mid-sized features end-to-end, with support from senior engineers.
• Contribute to systems that support user onboarding, subscriptions, billing flows, and feature access.
• Collaborate closely with product, design, and data teams to ship improvements quickly and iteratively.
• Write clean, maintainable, and well-tested code.
• Participate in code reviews and contribute to shared engineering standards.
• Balance technical best practices with practical product needs and timelines.

• 3–5 years of experience building and shipping production software.
• Experience with at least one backend language (e.g., Go, Python, Java, C#).
• Strong experience with React, Next.js, or similar frontend frameworks.
• Solid understanding of APIs, web architecture, and data modeling.
• Familiarity with cloud platforms (AWS, GCP, etc.) and containerized environments (Docker).
• Comfortable working in a collaborative, product-driven engineering team.
• Interest in building systems related to user growth, subscriptions, or customer lifecycle.
• Clear communicator with a proactive, ownership-oriented mindset.

• Real product impact: Build features used by thousands (or millions) of end users.
• Room to grow: Work alongside experienced engineers and expand your technical skill set.
• Modern stack: Use contemporary tools, frameworks, and cloud infrastructure.
• Startup environment: Fast-moving, high-trust culture with meaningful responsibility.

$140,000 to $180,000 annually

Compensation is based on a range of factors that include relevant experience, knowledge, skills, other job-related qualifications