FullStack Engineer

FullStack Engineer Scale a high-growth marketplace from the ground up. Drive product direction, ship full-stack code, and claim your stake in a fast-moving SoHo startup. Location: SoHo, New York City, NY (Hybrid, ~3 days/week in-office) Salary: $150K - $200K + Competitive Equity About the Opportunity A fast-growing early-stage creator marketing startup based in New York City is seeking a Full Stack Engineer to join its lean, highly collaborative engineering team. This role is ideal for engineers who enjoy building consumer-facing products end-to-end, thrive in fast-moving startup environments, and want direct ownership over product development across web, mobile, and backend systems. The company is building a platform that helps local businesses and creators collaborate through authentic, high-volume influencer campaigns. Engineers work closely with founders and cross-functional teammates to rapidly ship features, improve user experiences, and scale platform capabilities for both SMB and enterprise customers. This is a highly hands-on role where engineers are expected to operate with autonomy, navigate ambiguity, and contribute across the full product stack. Key Responsibilities Build and ship full-stack product features across web applications, mobile apps, and backend systems Develop scalable frontend experiences using React, JavaScript, and TypeScript Build backend services, APIs, integrations, and business logic using Node.js Work on mobile product development across Flutter and native iOS environments Own and maintain third-party integrations, particularly social and creator platform APIs Build analytics dashboards and reporting features for business users and campaign performance tracking Contribute to App Store release processes and mobile deployment workflows Partner closely with founders and internal stakeholders to shape product direction and user experiences Develop flexible custom solutions for strategic enterprise customers while supporting ongoing product growth Operate independently in a fast-paced startup environment with high ownership and minimal oversight What Sets This Role Apart Opportunity to work directly with founders and influence technical direction from an early stage High ownership engineering culture with meaningful product impact Exposure to consumer, creator economy, and marketplace product challenges Ability to work across web, mobile, backend, analytics, and integrations within a single role Fast-moving startup environment with strong autonomy and rapid iteration cycles Competitive compensation package including meaningful equity participation Opportunity to help scale a rapidly growing platform expanding into new markets Qualifications 3+ years of experience in full-stack software engineering Strong experience with React, JavaScript/TypeScript, and Node.js Experience building and shipping customer-facing applications in startup or fast-paced environments Familiarity with mobile application development using Flutter and/or native iOS technologies Experience working with third-party APIs and integrations Strong product mindset with the ability to operate independently and solve ambiguous problems Ability to own features end-to-end from concept through deployment Strong communication and collaboration skills within small, cross-functional teams Nice to Have Experience with Meta/Instagram APIs or creator/social platform integrations Background building consumer-facing, marketplace, or creator economy products Familiarity with UIKit and SwiftUI Experience shipping apps to the Apple App Store Strong design instincts and product UX awareness Personal projects, side projects, or portfolio work demonstrating technical curiosity and ownership Additional Information Hybrid role based in SoHo, New York City (~3 days/week in office) Visa sponsorship may be considered on a case-by-case basis H-1B transfers may be feasible; new H-1B sponsorship is unlikely Candidates with strong startup ownership and consumer product experience will be prioritized About Sperton Sperton is a global recruitment and consulting firm with offices across Europe, Asia, and the Americas. We help companies find and manage top talent across borders, delivering fast, compliant, and flexible recruitment, consultant hiring, and global mobility services. Locations United States Remote status Hybrid Employment type Full-time Job location SoHo, New York City, NY Workplace & Culture at Sperton At Sperton, we believe that great results come from great people. Our culture is built on trust, collaboration, and a shared passion for delivering quality in everything we do. We are a Norwegian-owned international company with colleagues across Europe, Asia, and the USA , working together seamlessly across time zones and cultures. Our teams are diverse, yet united by the same goal — to connect people and companies in meaningful ways. We value openness, initiative, and continuous learning. Everyone at Sperton is encouraged to take ownership, share ideas, and challenge existing ways of working to make our solutions even better. Even though we operate globally, our approach is personal. We take pride in creating a supportive and inclusive environment where people feel heard, respected, and motivated to grow — both professionally and personally.