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Founding Full Stack Engineer Jobs in New York (NOW HIRING)

Pensar

Full Stack Engineer

New York, NY · On-site

Pensar is looking for a talented Full Stack Engineer to join our team and help build the future of offensive security software. You'll work closely with security researchers, product managers, and ...

talentpluto

Senior Full Stack Engineer

Manhattan, NY · On-site

$210 - $260/hr

The Opportunity As a Senior Full Stack Engineer, you will work across the stack, spanning frontend, backend, and the data pipelines and agentic/AI workflows at the core of the product. This is a ...

Cross River

Full Stack Engineer

Fort Lee, NJ · On-site

$160K - $200K/yr

What We're Looking For Cross River Bank is seeking a Senior Full Stack Engineer who thrives at the intersection of intelligent systems and polished product experiences. You'll work across the entire ...

iCapital Network

Full Stack Engineer

New York, NY · On-site

The Full Stack Engineer at iCapital Network will work end-to-end on new Features, Enhancements, and Defect Resolution on the core iCapital Platform. You will work closely with our Product Management ...

Zenlaw

Full-Stack Engineer (Remote)

New York, NY · On-site +1

As a Zenlaw Full-Stack Engineer you will: * Develop new features working with cross-functional squads, within a distributed team * Use creative thinking - we are building most of our features from ...

Cross River

Full Stack Engineer

Fort Lee, NJ · On-site

The Full Stack Engineer will lead the design and architecture of their LLM-based platform, collaborating with product managers and stakeholders to translate business vision into scalable technical ...

Willis Re

Full Stack Engineer

New York, NY · On-site

$200K - $220K/yr

Full Stack Engineer Willis Re is building its global technology estate from the ground up, unencumbered by legacy and designed around data, analytics and modern cloud platforms. We are looking for a ...

Clerkie

Full-Stack Engineer

New York, NY · Remote

$90/hr

About the role We're looking for a Full-Stack engineer who wants to build, own, and ship end-to-end product experiences in a fast-moving environment. This role is ideal for someone who is comfortable ...

Brooksource

Sr Full Stack Engineer

Summit, NJ · On-site

$75 - $80/hr

Sr Full Stack Engineer Summit, NJ Hybrid Role Compensation: $75 - $80 per hour ABOUT THE ROLE Our client, a Fortune 500 Consumer Packaged Goods (CPG) company, is seeking a Senior Full Stack Engineer ...

iCapital Network

Full Stack Engineer

New York, NY · On-site

The Full Stack Engineer at iCapital Network will work end-to-end on new Features, Enhancements, and Defect Resolution on the core iCapital Platform. You will work closely with our Product Management ...

Junior

Full Stack Engineer

Manhattan, NY · On-site

They are looking for a Full Stack Engineer to join their team, who will have the opportunity to work on groundbreaking projects and contribute to product decisions while shaping the engineering ...

Cypress HCM

Sr. Full Stack Engineer

New York, NY

$175K - $200K/yr

Sr. Software Engineer We're looking for a strong full stack engineer to join a collaborative, fast-moving development team focused on building high-quality, user-centric web applications. This is an ...

Altis

Full-Stack Engineer

New York, NY · On-site

$120K - $240K/yr

We're looking for a full-stack AI engineer who ships production-grade intelligence platforms at 5-10× velocity. In this role, you will: * Own end-to-end full-stack features across React/Next.js ...

MLabs

Junior Full Stack Engineer

New York, NY · On-site

Junior Full Stack Engineer Location: New York (Office) Onsite | Full-time Compensation: Competitive Our client is a high-performance technology development firm responsible for building and operating ...

MLabs

Junior Full Stack Engineer

New York, NY · On-site

Junior Full Stack Engineer Location: New York (Office) Onsite | Full-time Compensation: Competitive Our client is a high-performance technology development firm responsible for building and operating ...

Melio

Full Stack Engineer

New York, NY · On-site

$135K - $160K/yr

Full Stack Engineer Location: Hybrid in NYC (3 day in-office requirement) Qualifications: * 4-5+ years of professional experience as a software engineer with frontend and backend development. * Hands ...

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All JobsFounding Full Stack Engineer JobsFounding Full Stack Engineer Jobs in New York

Founding Full Stack Engineer information

What is a founding full stack engineer?

A Founding Full Stack Engineer is an early, core technical team member at a startup who is responsible for building both the front-end and back-end of the company's product. This role goes beyond typical engineering, often involving product decisions, architecture design, and collaborating directly with the founders. Founding Full Stack Engineers help shape the company's culture, technical direction, and can have significant equity stake. Their work is crucial in taking the business from idea to launch, often in a fast-paced, resource-limited environment.

What are the key skills and qualifications needed to thrive as a founding full stack engineer?

To thrive as a Founding Full Stack Engineer, you need expertise in both front-end and back-end development, deep knowledge of programming languages like JavaScript, Python, or Ruby, and experience with scalable architectures, often backed by a degree in computer science or equivalent experience. Familiarity with frameworks (React, Node.js, Django), version control systems (Git), cloud platforms (AWS, GCP), and DevOps practices is typically required. Strong problem-solving, initiative, adaptability, and excellent communication distinguish successful candidates, enabling effective collaboration in a startup environment. These skills and qualities are crucial for building robust products rapidly and influencing the company's technical direction from its early stages.

What is the difference between Founding Full Stack Engineer vs Full Stack Engineer?

AspectFounding Full Stack EngineerFull Stack Engineer
CredentialsTypically requires proven full stack development experience, sometimes with startup or early-stage company involvementRequires relevant full stack development skills, often with formal education or certifications
Work EnvironmentEarly-stage startups or founding teams, often wearing multiple hatsEstablished companies or startups, focused on project delivery
Employer & Industry UsageFounding teams, startups, tech entrepreneursTech companies, agencies, startups, corporate IT teams

Founding Full Stack Engineers are key players in early-stage startups, often involved in building core products from scratch and shaping company technology. Full Stack Engineers work across various company sizes, focusing on developing and maintaining applications. The main difference lies in the startup environment and level of involvement in founding the company.

What unique challenges might a founding full stack engineer face when joining an early-stage startup?

As a Founding Full Stack Engineer at an early-stage startup, you'll often balance building core product features with setting up foundational technical infrastructure. This role typically requires wearing multiple hats, from architecting systems and writing code to making critical technology decisions and collaborating closely with non-technical founders. You may encounter challenges such as ambiguous requirements, shifting priorities, and limited resources, but you'll also have significant influence over the company's technical direction. The dynamic environment encourages rapid learning and offers accelerated career growth, particularly for those who thrive in fast-paced, collaborative settings.
What are popular job titles related to Founding Full Stack Engineer jobs in New York? For Founding Full Stack Engineer jobs in New York, the most frequently searched job titles are:
What job categories do people searching Founding Full Stack Engineer jobs in New York look for? The top searched job categories for Founding Full Stack Engineer jobs in New York are:
What cities in New York are hiring for Founding Full Stack Engineer jobs? Cities in New York with the most Founding Full Stack Engineer job openings:
Founding Full Stack Engineer jobs near you
Infographic showing various Founding Full Stack Engineer job openings in New York as of August 2026, with employment types broken down into 87% Full Time, 7% Part Time, 1% Temporary, and 5% Contract. Highlights an 86% Physical, 5% Hybrid, and 9% Remote job distribution.

Full Stack Engineer

Pensar

New York, NY • On-site

Full-time

Medical, Dental, Vision

Re-posted 9 days ago

Job description

Pensar is looking for a talented Full Stack Engineer to join our team and help build the future of offensive security software. You'll work closely with security researchers, product managers, and other engineers to design, develop, and maintain our core platform and open source tooling. This role requires a passion for clean code, product excellence, and a deep understanding of both frontend and backend technologies.
Key Responsibilities
  • Design, implement, and maintain scalable web applications and backend services
  • Collaborate with security researchers to translate pentesting workflows into intuitive and efficient user experiences
  • Build and enhance APIs, UI components, and integrations with customer environments
  • Optimize application performance, reliability, and security
  • Participate in code reviews, design discussions, and contribute to engineering best practices
  • Work with open source projects and contribute to the evolution of Pensar's tooling
  • Help shape the technical roadmap and architectural direction alongside leadership
Benefits
  • Competitive salary and equity in an early-stage offensive security company
  • Opportunities for professional growth and contribution to cutting-edge security research
  • Flexible remote work environment
  • Collaborative and mission-driven team culture

Requirements
  • 3+ years of professional full stack development experience
  • Proficiency in JavaScript/TypeScript and at least one backend language such as Go, Python, or Node.js
  • Experience with modern frontend frameworks (React, Vue, or similar)
  • Strong understanding of RESTful API design and integration
  • Familiarity with database technologies (SQL and/or NoSQL)
  • Experience with cloud platforms (AWS, GCP, Azure) and containerization (Docker, Kubernetes) is a plus
  • Passion for building secure, reliable, and maintainable software
  • Good communication skills and ability to collaborate across teams
Preferred Qualifications
  • Background or interest in cybersecurity or offensive security
  • Experience working in open source communities or contributing to security-related projects
  • Knowledge of security best practices in software development and deployment
  • Familiarity with CI/CD pipelines and automation tooling

Benefits
  • Comprehensive health, dental, and vision insurance
  • Direct ownership of customer engagements and offensive research at an early-stage security company
  • Professional development budget for conferences, training, and certifications
  • Support for publishing research and presenting at industry conferences
  • Direct, visible impact on both our open source tooling and commercial platform

Apply