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Founding Full Stack Engineer Jobs in Hackensack, NJ

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 ...

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 ...

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 ...

Willis Re

Full Stack Engineer

New York, NY · On-site

$200K - $220K/yr

  • Medical

  • Retirement

  • PTO

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

  • Medical

  • Dental

  • Vision

  • Retirement

  • PTO

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 ...

Aquent

Full Stack Engineer

Manhattan, NY · On-site +1

$45 - $55/hr

  • Medical

  • Retirement

Our client is looking for a Full Stack Engineer to join the Music Videos (MTV) squad within their Music X organization. The team's mission is to give artists the tools they need to reach fans through ...

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 · On-site

$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 ...

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 ...

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 ...

Melio

Full Stack Engineer

New York, NY · On-site

$135K - $160K/yr

  • Medical

  • Dental

  • Vision

  • Retirement

  • PTO

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 ...

Melio

Full Stack Engineer

New York, NY · Hybrid

$135K - $160K/yr

  • Medical

  • Dental

  • Vision

  • Retirement

  • PTO

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 Hackensack, NJ

Founding Full Stack Engineer information

See Hackensack, NJ salary details

$48.5K

$147K

$207.8K

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

As of Aug 13, 2026, the average yearly pay for founding full stack engineer in Hackensack, NJ is $146,987.00, according to ZipRecruiter salary data. Most workers in this role earn between $121,100.00 and $172,300.00 per year, depending on experience, location, and employer.

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 Hackensack, NJ?

For Founding Full Stack Engineer jobs in Hackensack, NJ, the most frequently searched job titles are:

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Cities near Hackensack, NJ with the most Founding Full Stack Engineer job openings:

Founding Full Stack Engineer jobs near you

Full Stack Engineer

Cross River

Fort Lee, NJ • On-site

$160K - $200K/yr

Full-time

Re-posted 23 days ago

Job description

Who We Are
Cross River builds the infrastructure behind the world's most innovative financial products. Our technology and capital solutions power payments, cards, lending, and digital asset capabilities that move money safely, instantly, and inclusively - trusted by leading fintechs, enterprises, and disruptors across the globe.
Our mission is simple: to build the financial infrastructure that expands access and opportunity for all. Guided by a culture of collaboration, curiosity, and purpose, Cross River has been named one of American Banker's Best Places to Work in Fintech year after year. Whether you're designing code, solving regulatory puzzles, or developing strategy, you'll join a team where innovation and integrity drive everything we do - and where your work helps shape the future of finance.
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 stack from designing React interfaces that surface AI capabilities to engineers and end users, to building the Python and Node.js services that power our LLM-based Agentic platform. A key part of this role is hands-on experience with designing, building, and integrating MCP servers that connect our AI agents to internal tools, financial data systems, and third-party APIs. You'll collaborate closely with product, compliance, and cross-functional engineering teams to build financial technology that's fast, secure, and genuinely intelligent.
Responsibilities:
  • Design, build, and continuously improve our LLM-based Agentic platform. Own end-to-end architecture decisions from model orchestration and prompt design to retrieval pipelines, tool-calling patterns, and evaluation frameworks.
  • Architect and build high-performance services in Python and/or Node.js. Design systems for extreme speed, reliability, and real-time data processing under high traffic conditions.
  • Design and maintain MCP servers that give AI agents structured, secure access to internal banking systems, external APIs, databases, and developer tools making Agentic platform composable and extensible by design.
  • Build intuitive React interfaces that expose AI capabilities like chat interfaces, agentic dashboards, real-time streaming UIs, and internal tooling. Own state management patterns and component architecture at scale.
  • Partner with product managers, business stakeholders, compliance, and engineering teams to translate vision into scalable technical requirements and roadmaps.
  • Design and ensure the platform meets enterprise-grade security and financial regulatory standards.
  • Actively upskill fellow engineers on full-stack best practices, LLM integration patterns, and production of AI systems. Help define coding standards and contribute to a culture of engineering excellence.
  • Evaluate emerging models, frameworks, and tooling. Prototype and integrate the most impactful advances into our platform and internal developer productivity tooling.

Qualifications:
  • Hands-on production experience with Large Language Models, prompt engineering, RAG workflows, agent frameworks, and LLM evaluation strategies.
  • Experience building and consuming MCP servers.
  • 5+ years of professional software development with a proven record on complex full-stack systems.
  • Experience with modern JavaScript (ES6+), React, state management (Redux, Zustand, or similar) at scale.
  • Hands-on experience architecting on AWS (DynamoDB, S3, RDS, Lambda, and API Gateway). Knowledge of Infrastructure as Code (Terraform) is a plus.
  • Deep understanding of TDD, CI/CD pipelines, and Agile/Scrum leadership.
  • Ability to debug problems across distributed systems and optimize bottlenecks in real-time data flows.
  • Great communicator with the ability to influence technical direction and manage stakeholder expectations.

#LI-JJ1 #LI-Onsite
Salary Range: $160,000.00 - $200,000.00
Cross River is an Equal Opportunity Employer. Cross River does not discriminate on the basis of race, religion, color, sex, gender identity, sexual orientation, age, non-disqualifying physical or mental disability, national origin, veteran status or any other basis covered by appropriate law. All employment is decided on the basis of qualifications, merit, and business need.
By submitting your application, you give Cross River permission to email, call, or text you using the contact details provided. We will only contact you with job related information.

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