Senior Software Engineer, Fullstack

Posted Yesterday
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New York City, NY, USA
In-Office
190K-225K Annually
Senior level
Events • Social Media • Software
Maximizing IRL human connection for the world
The Role
Lead architecture and implementation of complex full-stack features for a live-events platform. Drive scalable, reliable, and high-performing systems; contribute across frontend, backend, databases, and infrastructure; build data-driven tools; mentor engineers; and collaborate on technical decisions and product experimentation.
Summary Generated by Built In
About Posh

We are all social creatures, but the dominant “social” companies today have evolved into digital loneliness machines, driving isolation, anxiety, and mental health challenges around the world.

Human connection is lost. Posh is a beacon guiding us back.

Posh enables anyone to build an IRL community based on shared interests, while connecting consumers with the communities of people just like them. Founded by event organizers who were frustrated with the growing loneliness epidemic and the tools available to build their own event brand, we’ve built the ultimate platform for launching, monetizing, and finding IRL communities of people just like you. In just 6 years, Posh has grown to a team of 70, expanded to 10M+ users, secured $70m in venture funding, and facilitated over $400M in transactions.

About The Role

At Posh, you'll help shape our platform that brings people together through live events. Your work will directly impact how event organizers create experiences and how attendees discover and enjoy them.

We're looking for someone who excels in both technical skills and leadership. You'll tackle exciting projects that push our platform forward. Some recent work includes building a system for users to follow each other, creating curated event playlists, and tools for affiliate event promotion. If you enjoy solving real-world problems and working in a fast-paced environment, you'll fit right in.

This is an in-person position at our New York City office located in the heart of SoHo, where you'll be part of a team that's revolutionizing how people connect in the real world.

Key Responsibilities:
  • Lead the architecture design and implementation of complex features.

  • Demonstrate full stack experience with specialization in either frontend, backend, or infrastructure while contributing to broader projects.

  • Collaborate on architecture and technical decisions that influence the direction of the platform, ensuring scalability, performance, and user-focused improvements.

  • Focus on performance optimization and system reliability, especially as our user base grows.

  • Build with data and analytics in mind which provides actionable insights for business leaders and event organizers.

  • Drive experimentation with MVPs, balancing rapid iteration with long-term sustainable growth and developer experience.

  • Contribute to either frontend design systems, database design, or dev ops/infrastructure to ensure scalable, secure, and maintainable systems.

  • Provide mentorship to engineers, fostering a culture of growth and collaboration.

Ideal Candidate:
  • 5+ years of experience leading complex technical projects with significant business impact.

  • Strong expertise in a specific area (e.g., frontend, backend, or infrastructure) while maintaining broad knowledge of the full stack.

  • Proficiency in relevant technologies (e.g., React, React Native, Typescript, AWS or similar cloud providers), with experience in either mobile app development or backend systems.

  • Experience with scalability, performance optimization, and building tools that support data-driven decision-making.

  • Strong problem-solving skills and a passion for creating products that connect people in the real world.

  • Ability to lead initiatives, mentor others, and communicate effectively across technical and non-technical teams.

  • Experience working at consumer, social, or marketplace companies is a plus, as it speaks to our user-centric values at Posh.

When applying, please include links to your GitHub profile or a portfolio of past projects.

Posh provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.

This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training.

Posh is committed to providing reasonable accommodations for qualified individuals with disabilities in our job application procedures. Please let us know if you need assistance or accommodation due to a disability

Skills Required

  • 5+ years of experience leading complex technical projects with significant business impact
  • Strong expertise in frontend, backend, or infrastructure with broad full-stack knowledge
  • Proficiency with relevant technologies such as React, React Native, TypeScript, and AWS or similar cloud providers
  • Experience with mobile app development or backend systems
  • Experience with scalability and performance optimization
  • Experience building tools that support data-driven decision-making
  • Ability to lead initiatives, mentor engineers, and communicate across technical and non-technical teams
  • Experience at consumer, social, or marketplace companies
  • GitHub profile or portfolio of past projects

Posh Compensation & Benefits Highlights

  • Healthcare Strength Posh states it covers 100% of medical, dental, and vision premiums for employees and dependents. This comprehensive coverage is presented as notably strong for a startup.
  • Equity Value & Accessibility The company highlights competitive equity for all employees, with equity bands targeted above the 75th percentile and refresh grants every two years. This structure indicates meaningful ownership and ongoing upside.
  • Wellbeing & Lifestyle Benefits Everyday perks include a company-paid Equinox membership, a daily Uber Eats credit on in-office days, and regular team dinners/off-sites. These offerings add tangible day-to-day value for employees working on-site.

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The Company
HQ: New York, New York
70 Employees
Year Founded: 2019

What We Do

Posh is the first social media platform dedicated to real-life social experiences. We have democratized event creation, making it easy for anyone to host events and empowering organizers to curate unique experiences. In doing so, Posh enables consumers to discover social events in their community, connect with peers around shared interests, and start and scale their own social communities.

Why Work With Us

At Posh, we're not just building an event platform—we're crafting a movement to end loneliness by fostering meaningful in-person connections. Born from the vibrant energy of NYC's event scene, our mission is to empower organizers and communities to create unforgettable experiences.

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Posh Offices

OnSite Workspace

Posh thrives on face‑to‑face energy. When we share a whiteboard, decisions compress from days to minutes and ideas gain a heartbeat. That’s why onsite work is our default.

Typical time on-site: None
HQNew York, New York

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