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Founding Full Stack Software Engineer Jobs in Islip, NY

Thesis

Product Engineer, Full-Stack

New York, NY · On-site

About the role We are looking for a product-minded Full-Stack Software Engineer to help design, build, and scale Thesis's core platform. This is a broad-scope, hands-on engineering role for a ...

Cape

Full Stack Software Engineer

New York, NY · On-site

Are you the candidate we are looking for? (Requirements for the role) You have: * 4+ years of full stack software engineering experience. * Engineering background in Computer Science, Mathematics ...

Empassion

Senior Full Stack Software Engineer

New York, NY · Remote

$120K - $175K/yr

The Senior Full Stack Software Engineer will report directly to the Director of Technology, a seasoned technology leader with experience delivering high-quality software and managing engineering ...

Empassion

Senior Full Stack Software Engineer

New York, NY · On-site +1

$120K - $175K/yr

The Senior Full Stack Software Engineer will report directly to the Director of Technology, a seasoned technology leader with experience delivering high-quality software and managing engineering ...

Etherfi

Senior Full Stack Software Engineer

New York, NY · On-site

$160K - $200K/yr

Position overview: We're looking for a senior full stack software engineer to own end to end delivery of features relating to our core products. You will form a key part of our engineering team ...

INSTALILY.AI

Software Engineer, Full Stack

New York, NY · On-site

About the Role As a Full Stack Software Engineer at InstaLILY, you'll own meaningful pieces of our AI agent platform: the core systems that let autonomous agents reason, act, and integrate into our ...

OpenSea

Full-Stack Software Engineer

New York, NY · On-site +1

As an early engineering hire, you'll have broad ownership over the OpenSea product. Here's what you ... Requirements: * 2+ years experience with full-stack web development * Fast learner * Comfortable ...

OpenSea

Full-Stack Software Engineer

New York, NY

As an early engineering hire, you'll have broad ownership over the OpenSea product. Here's what you ... Requirements: * 2+ years experience with full-stack web development * Fast learner * Comfortable ...

Constrafor

Full Stack Software Engineer

New York, NY · On-site

We're seeking an exceptional Full Stack Engineer to join our dynamic team and lead the development and maintenance of our platform's core functionality across both frontend and backend systems. In ...

Dirac, Inc.

Full Stack Software Engineer

New York, NY · On-site

$120K - $200K/yr

Full Stack/Backend Experience (Nice to Have): - Proficiency with backend technologies in languages ... Nice to Have: - Background in manufacturing, aerospace, or industrial software. - Familiarity with ...

NOUS RESEARCH

Full Stack Engineer

New York, NY · On-site

Own software end-to-end across stacks, from managed inference services and platform infrastructure ... of full-stack software engineering experience * Strong with Python, TypeScript/Node.js, and a ...

Zero21

Founding Engineer, Full Stack

New York, NY

Our platform consolidates fragmented software systems and streamline workflows both internally ... the full stack of software development and scaling and leading engineering teams. And, we're not ...

Zero21

Founding Engineer, Full Stack

New York, NY · On-site +1

Our platform consolidates fragmented software systems and streamline workflows both internally ... the full stack of software development and scaling and leading engineering teams. And, we're not ...

Alpaca Health

Full Stack Software Engineer

New York, NY · On-site

$120K - $200K/yr

... software, payer contracting, and full back-office infrastructure. Our goal is simple: use ... Founding engineer autonomy, real ownership, and a company that's clearly on its way somewhere.

Alpaca Health

Full Stack Software Engineer

New York, NY · On-site

$120K - $200K/yr

... software, payer contracting, and full back-office infrastructure. Our goal is simple: use ... Founding engineer autonomy, real ownership, and a company that's clearly on its way somewhere.

Applecart

Senior Full-Stack Software Engineer

New York, NY · On-site +1

$160K - $200K/yr

... full-stack applications, or infrastructure improvements. Who You Are You are an experienced, adaptable software developer who thrives in an ambitious startup environment. You enjoy tackling complex ...

Applecart

Senior Full-Stack Software Engineer

New York, NY · On-site

$160K - $200K/yr

... full-stack applications, or infrastructure improvements. Who You Are You are an experienced, adaptable software developer who thrives in an ambitious startup environment. You enjoy tackling complex ...

Applecart

Senior Full-Stack Software Engineer

New York, NY · On-site +1

$160K - $200K/yr

... full-stack applications, or infrastructure improvements. Who You Are You are an experienced, adaptable software developer who thrives in an ambitious startup environment. You enjoy tackling complex ...

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Showing results 41-60

All JobsFounding Full Stack Software Engineer JobsFounding Full Stack Software Engineer Jobs in Islip, NY

Founding Full Stack Software Engineer information

See Islip, NY salary details

$46.1K

$139.7K

$197.4K

How much do founding full stack software engineer jobs pay per year?

As of Aug 7, 2026, the average yearly pay for founding full stack software engineer in Islip, NY is $139,680.00, according to ZipRecruiter salary data. Most workers in this role earn between $115,000.00 and $163,800.00 per year, depending on experience, location, and employer.

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

To thrive as a Founding Full Stack Software Engineer, you need deep expertise in both front-end and back-end development, strong problem-solving skills, and experience building scalable web applications, usually demonstrated by a degree in computer science or equivalent experience. Mastery of tools and frameworks such as JavaScript, React, Node.js, cloud platforms (AWS, GCP), and version control systems like Git is typically required. Exceptional communication, adaptability, and entrepreneurial mindset are crucial for collaborating in a dynamic startup environment and driving product vision. These skills are vital for rapidly iterating, shipping robust products, and establishing a strong technical foundation for a growing company.

What is a founding full stack software engineer?

Founding Full Stack Software Engineers are technical professionals who join a startup at its earliest stages to help build and shape the company's core products and technology infrastructure. They work across both the front-end and back-end of applications and play a key role in making architectural decisions, setting up development processes, and establishing the technical foundation. As 'founding' team members, they often have greater responsibilities, including working closely with company founders, contributing to product strategy, and sometimes receiving equity or a stake in the company.

What unique challenges might I face as a founding full stack software engineer in an early-stage startup?

As a Founding Full Stack Software Engineer, you’ll often juggle multiple responsibilities, from designing core architecture to deploying code and setting up development workflows. Since resources are limited and the product vision can evolve quickly, adaptability and strong communication with founders and other early team members are key. You may also be deeply involved in decisions beyond pure engineering, such as hiring, product strategy, and even customer support. This environment can be both demanding and highly rewarding, offering accelerated learning and significant influence over the company’s technical direction.
What cities near Islip, NY are hiring for Founding Full Stack Software Engineer jobs? Cities near Islip, NY with the most Founding Full Stack Software Engineer job openings:
Founding Full Stack Software Engineer jobs near you

Product Engineer, Full-Stack

Thesis

New York, NY • On-site

Other

Re-posted 16 days ago

Job description

About us

Thesis is building the AI-powered care team platform for infinitely scalable clinical capacity. We radically increase access and improve quality of care by combining AI agents with clinical experts to take on high-impact clinical operations and care management activities for healthcare organizations.

We're based in NYC, are growing rapidly, and are backed by $60 million in funding from Oak HC/FT, CRV, Black Opal Ventures, and experienced C-level healthtech angel investors.

About the role

We are looking for a product-minded Full-Stack Software Engineer to help design, build, and scale Thesis's core platform. This is a broad-scope, hands-on engineering role for a creative builder who cares deeply about product quality, user experience, and technical rigor. As an early member of the engineering team, you will play a foundational role in shaping Thesis's product, systems, and engineering culture.

Responsibilities:

  • Own core systems: Architect, implement, and maintain business-critical components that define and power Thesis's product, including frontend experiences, backend services, and data flows.
  • Build end-to-end features: Lead the full lifecycle of feature development, from greenfield technical design through production deployment and iteration.
  • Partner cross-functionally: Collaborate closely with founders, product, and design to translate user, clinical, and business needs into scalable technical solutions.
  • Continuously evolve the platform: Improve system architecture, scalability, developer experience, and operational excellence as the company grows.
  • Build hands-on with AI/ML: Dive into our AI/ML codebase (agents, LLM/RAG systems, evaluation, and supporting pipelines) to design, implement, and iterate on product features that measurably improve user experience and outcomes.

We expect you to have:

  • Technical depth: 4+ years of professional experience as a full stack software engineer delivering high-quality, production-grade software.
  • Full-stack expertise: Strong experience across the stack, with deep strength in either frontend or backend technical design and implementation.
  • Modern engineering toolkit: Hands-on experience with technologies such as TypeScript, Node.js, React, Next.js, Postgres, RPC-based architectures, and cloud platforms like AWS.
  • Product and UX mindset: A strong belief in great design and user-centered problem solving, with experience building intuitive, polished user experiences.
  • AI fluency: Familiarity with modern AI technologies and an interest in applying LLMs and automation to development processes and real-world product challenges.
  • Healthcare awareness: Experience building systems that work with sensitive data and regulated environments, or a strong interest in learning healthcare workflows and constraints.
  • Clear communication: Ability to explain complex technical concepts clearly to both technical and non-technical stakeholders.
  • NYC-based: You are based in New York and excited to be in-office ~3 days per week.

Target compensation for this role is $200-$250k, plus equity and a generous benefits package.

Thesis Care is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.


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