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Sr Fullstack Developer Jobs in New York (NOW HIRING)

adMarketplace

Senior Fullstack Engineer

Manhattan, NY · On-site

$170K - $200K/yr

The Role We are looking for an AI-first full-stack engineer to join Workflows team - building AI-native UI and agentic workflow Amplify platform. Amplify is a control plane for all advertiser ...

Novellia

Senior Fullstack Software Engineer

New York, NY · On-site +1

$150K - $200K/yr

We are seeking talented and experienced Fullstack Software Engineers to join our dynamic team. The ... The role can be for a principal, lead, staff or senior title depending on experience and career ...

Tech Tammina LLC

Sr. Sitecore Fullstack Engineer

New York, NY · On-site

$109K - $135K/yr

Job Title: Sr. Sitecore Fullstack Engineer Work Status: U.S. Citizens and Green Card Holders Only Start Date: ASAP We are seeking an experienced Sr. Sitecore Fullstack Engineer to join our team. In ...

Tory Burch

Sr. Engineer, Fullstack

Jersey City, NJ · On-site

You are a highly skilled Senior Fullstack Software Engineer and technical leader who thrives on building scalable, resilient, secure, and modern digital experiences across frontend applications ...

Moonshot AI, Inc.

Senior Software Engineer

Manhattan, NY · On-site

$135K - $178K/yr

What You'll Build & Achieve As our Senior Fullstack Engineer, you'll be hands-on across the stack -- designing, building, and scaling systems that power our AI-driven platform. Expect autonomy, speed ...

Moonshot AI

Senior Software Engineer

New York, NY · On-site

$150K - $210K/yr

What You'll Build & Achieve As our Senior Fullstack Engineer, you'll be hands-on across the stack - designing, building, and scaling systems that power our AI-driven platform. Expect autonomy, speed ...

Tory Burch LLC

Sr. Engineer, Fullstack

Jersey City, NJ · On-site

You are a highly skilled Senior Fullstack Software Engineer and technical leader who thrives on building scalable, resilient, secure, and modern digital experiences across frontend applications ...

Tory Burch

Sr. Engineer, Fullstack

Jersey City, NJ · On-site

You are a highly skilled Senior Fullstack Software Engineer and technical leader who thrives on building scalable, resilient, secure, and modern digital experiences across frontend applications ...

Flagler Health

Senior Fullstack Engineer

Manhattan, NY · On-site

Flagler Health is building the clinical operating system for modern musculoskeletal care. We partner with MSK provider groups and specialty clinics to help them grow, operate more efficiently, and ...

Biograph

Senior Fullstack Software Engineer

Manhattan, NY · On-site

$150K - $200K/yr

Biograph is looking for senior software engineers to help us scale a data driven approach to preventative care. Our small and nimble engineering team thrives on ownership and autonomy. We're building ...

Headway

Senior Fullstack Software Engineer

New York, NY · On-site +1

$182K - $278K/yr

The Work Fullstack at Headway means end-to-end ownership. You're building reliable abstraction ... or developer tooling. You bring a builder's mindset: what can we automate, what should stay human ...

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All JobsSr Fullstack Developer JobsSr Fullstack Developer Jobs in New York

Sr Fullstack Developer information

What is a Sr Fullstack Developer?

A Sr Fullstack Developer is an experienced software engineer who is proficient in both frontend and backend development. They work with a variety of programming languages, frameworks, and databases to build fully functional web applications. In addition to coding, senior fullstack developers often lead projects, mentor junior developers, and help make architectural decisions. Their broad skill set allows them to handle tasks across the entire technology stack, ensuring that applications are efficient, scalable, and user-friendly.

What are some typical challenges a Sr Fullstack Developer faces when balancing front-end and back-end responsibilities?

Sr Fullstack Developers often need to juggle tasks across both the front-end and back-end, which can be challenging when priorities shift quickly or deadlines are tight. Balancing deep technical knowledge in multiple frameworks and languages while ensuring seamless integration requires strong organizational skills and effective communication with both UI/UX designers and backend engineers. Additionally, staying updated with evolving technologies on both ends is crucial, so time management and continuous learning are key to success in this role.

What are the key skills and qualifications needed to thrive as a Sr Fullstack Developer, and why are they important?

To thrive as a Sr Fullstack Developer, you need advanced proficiency in both front-end and back-end programming languages, frameworks, and a solid understanding of software architecture, typically supported by a computer science degree or equivalent experience. Familiarity with tools such as Git, Docker, CI/CD pipelines, cloud platforms, and relevant certifications like AWS Certified Developer or similar are often expected. Strong problem-solving abilities, effective communication, and a collaborative mindset are vital soft skills for this role. These competencies enable developers to deliver robust, scalable solutions and effectively drive projects to completion in dynamic team environments.

What is the difference between Sr Fullstack Developer vs Backend Developer?

AspectSr Fullstack DeveloperBackend Developer
Required SkillsProficiency in both frontend (JavaScript, HTML, CSS) and backend (Node.js, Python, Java)Specialized in server-side languages and database management
Work EnvironmentWorks on both client-facing and server-side componentsFocuses primarily on backend systems and APIs
Common UsageUsed across full product development teamsPrimarily in backend-focused roles within development teams

The main difference between a Sr Fullstack Developer and a Backend Developer is the scope of expertise. A Sr Fullstack Developer handles both frontend and backend tasks, while a Backend Developer specializes in server-side development. Both roles require strong programming skills, but the Fullstack role demands broader knowledge across the entire application stack.

What are popular job titles related to Sr Fullstack Developer jobs in New York?

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What job categories do people searching Sr Fullstack Developer jobs in New York look for?

The top searched job categories for Sr Fullstack Developer jobs in New York are:

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Cities in New York with the most Sr Fullstack Developer job openings:

Sr Fullstack Developer jobs near you
Infographic showing various Sr Fullstack Developer job openings in New York as of August 2026, with employment types broken down into 1% As Needed, 86% Full Time, 8% Part Time, 1% Temporary, and 4% Contract. Highlights an 84% Physical, 6% Hybrid, and 10% Remote job distribution.

Senior Fullstack Engineer

Manhattan, NY • On-site

adMarketplace
Software Development • 51 - 200 employees
Learn more about adMarketplaceexternal

$170K - $200K/yr

Full-time

Medical, Retirement, PTO

Re-posted 5 days ago

Job description

Who We Are
adMarketplace is the largest global marketplace for Native Search advertising. For over 25 years, we've connected brands with consumers at the moment they express commercial intent beyond legacy search engines.
Today, our Native Search solutions are exclusively integrated across next-generation platforms where discovery happens, including web browsers, Buy Now Pay Later apps, and AI chat surfaces. Powered by vector search technology, our platform delivers relevant text and product ads that match consumers with the brands, products, and offers they're actively seeking.
Our award-winning culture is grounded in the principles of Curiosity, Collaboration, Creative Conflict, Commitment, and Competitiveness - our 5Cs. These values drive us to turn complexity into clarity and create measurable value for consumers, advertisers, and publishers alike.
The Role
We are looking for an AI-first full-stack engineer to join Workflows team - building AI-native UI and agentic workflow Amplify platform. Amplify is a control plane for all advertiser & publisher activity within adMarketplace. You will own full-stack end-to-end projects - you'll work closely with internal & external users, design, product, drive architecture and full stack implementation.
Your work will have a direct and measurable impact on our revenue. You will have a clear career progression path and numerous opportunities for both personal and professional growth in an intellectually stimulating and dynamic work environment.
What You'll Do:
  • Deliver production-ready features that improve client-facing and internal product workflows.
  • Build intuitive, reusable, and performant frontend experiences using React and other frontend technologies.
  • Develop scalable, secure, and observable backend microservices using Java.
  • Design and optimize database schemas, queries, indexes, and transactions.
  • Improve system reliability, performance, maintainability, and code quality.
  • Use AI-assisted development tools responsibly to increase productivity, testing quality, debugging speed, and documentation.
  • Mentor engineers, contribute to technical design, and raise engineering standards across the team.
Basic Qualifications:
Technical / Functional Skills
  • Bachelor's degree in Computer Science, Engineering, or related technical field preferred, or equivalent practical experience.
  • 5+ years of professional software engineering experience.
  • 3+ years of hands-on experience with React and preferably TypeScript.
  • 3+ years of hands-on experience with Java (preferably Spring Boot)
  • Experience working with relational databases, preferably MySQL.
  • Experience designing and maintaining microservices and GraphQL/REST API endpoints.
  • Experience with microservices, distributed systems, and production-grade applications.
  • Strong understanding of software design principles, clean code, testing, refactoring, and maintainable architecture.
  • Experience with CI/CD practices, automated testing, observability, and production support.
  • Experience using AI-assisted development tools responsibly and effectively for prototyping, architecting, coding, debugging, testing, refactoring, documentation, and learning.
  • Ability to validate AI-generated code for correctness, security, scalability, performance, and maintainability.

Core Competencies
  • Strong problem-solving and analytical thinking.
  • Strong stakeholder management and communication skills.
  • Sound technical judgment and ability to evaluate tradeoffs.
  • High ownership, accountability, and delivery orientation.
  • Ability to mentor engineers and improve team practices.
  • Comfort operating in a fast-paced, evolving environment.

Preferred Qualifications
  • Experience querying analytical databases such as ClickHouse for reporting and product analytics.
  • Experience with Kafka or similar event-driven technologies preferred.
  • Experience in ad tech, search, marketplace systems, analytics, or high-scale transactional platforms is a plus.

Compensation: $170,000 - $200,000 + bonus + equity
Join Us
adMarketplace has been named as one of the best places to work in New York City by Built In and Crain's- the latter of which have recognized us the past three years straight! AMP is currently experiencing triple digit growth, and it's never been a better time to join our team!
We offer a robust continuing education program, management training, regular company-wide lunch and learns, and well-defined career paths to ensure all our employees have an opportunity to grow.
At adMarketplace, we play to win, but we learn from our setbacks. Our commitment to a collaborative environment means no one succeeds alone, and no one fails alone either.
We know you've come to expect comprehensive healthcare, wellness programs, paid time off, commuter benefits, and 401k matching from any company, so it's a good thing we offer all of that and so much more. adMarketplace offers Summer Fridays, catered lunches, a fully stocked kitchen, ZogSports teams, happy hours and corporate retreats to encourage a strong work/life balance.
No Third Party Recruiters. We do not accept unsolicited agency resumes and we are not responsible for any fees related to unsolicited resumes.
*This range represents the low and high end of the base salary someone in this role may earn as an employee of adMarketplace in the New York office. Salaries will vary based on various factors including but not limited to professional and academic experience; training; associated responsibilities; and other business and organizational needs. The range listed is just one component of our total compensation package for employees. Salary decisions are dependent on the circumstances of each hire.
Department Software Engineering Locations New York Yearly salary $170,000 - $200,000

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