Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Senior Full Stack Engineer

$175k - $225k

Fonzi AI

Senior Full Stack Engineer

We're a well-funded, fast-growing startup revolutionizing hiring through AI. Recently launched, we've already attracted thousands of top engineers to our platform. Our vision is to build an AI-powered recruiting marketplace that will connect millions of candidates and companies, where AI recruiters learn what you do, what you're interested in, and match you to perfect opportunities automatically.

The Role

We're seeking a Senior Full Stack Engineer who can own projects end-to-end and ship fast without sacrificing code quality. This is a backend-leaning full-stack role where you'll build the core platform that powers our AI-driven marketplace. You'll work directly with our technical lead to architect and implement features that directly impact how thousands of candidates and companies connect.

This isn't just another engineering role - you'll be a true product engineer who understands that every line of code impacts real users. You'll collaborate closely with our recruiting and marketing teams, translating business needs into technical solutions while maintaining the delicate balance between speed and scalability that defines successful startups.

What You'll Do
  • Drive complete feature development end-to-end, from initial design through production deployment
  • Build robust backend systems using TypeScript and Node.js while creating intuitive frontend experiences with React and Next.js
  • Integrate AI capabilities into applications
  • Work alongside AI models to accelerate development while maintaining code quality
  • Balance rapid delivery with long-term architectural considerations
  • Collaborate directly with recruiting and marketing teams to understand and solve their technical challenges
  • Ship code fast while maintaining awareness of long-term architectural implications
  • Shape product direction when requirements are still forming - you'll help define the 'what' not just build the 'how'
  • Communicate technical concepts clearly to non-technical stakeholders
Required Experience
  • Strong TypeScript expertise : This is our primary language and you'll use it daily
  • Full-stack proficiency : Solid experience with Node.js, React, and Next.js
  • Backend focus : While full-stack, you should be stronger and more passionate about backend development
  • Database skills : PostgreSQL experience with ability to write efficient queries and design schemas
  • Serverless architecture : Experience building and deploying serverless applications
  • AI integration experience : You've integrated LLMs and AI models into production applications
  • Startup DNA : Minimum 5 years experience with proven success in fast-paced, ambiguous environments
  • Product mindset : Deep understanding of user experience and how engineering decisions impact business outcomes
  • Speed with intentionality : Ability to ship fast while being deliberate about technical debt trade-offs
Preferred Experience
  • Experience with AI prompting and working alongside AI coding assistants
  • Knowledge of CI/CD pipelines and deployment automation
  • Experience with cloud platforms (GCP preferred)
  • Background in marketplace or recruiting technology
  • Experience working directly with non-technical teams
What Makes You Successful Here
  • Extreme ownership : You take projects and run with them without constant oversight
  • Communication excellence : You can explain complex technical concepts to anyone
  • Adaptability : Thrive in a dynamic environment where priorities evolve based on business needs
  • Business acumen : You understand how your code impacts revenue and user experience
  • Self-directed : Thrives in minimal structure with loose sprint cycles
  • Speed-focused : Default to shipping and iterating rather than perfecting
What Makes This Special
  • High impact : Your code directly shapes how thousands of people find their next opportunity
  • Technical autonomy : Own entire features and make architectural decisions that matter
  • Cross-functional exposure : Work directly with recruiting, marketing, and leadership teams
  • AI at the edges : Build with cutting-edge AI tools while focusing on solid engineering fundamentals
  • Growth trajectory : Join early enough to influence technical direction as we scale
  • No red tape : Streamlined decision-making and flat organizational structure
Location

Brooklyn, NY - 3 days/week in office (Mondays required + 2 flexible days)

Compensation

$175,000 - $225,000 base salary + meaningful equity

Vacancy posted 2 days ago
Similar jobs that could be interesting for youBased on the Senior Full Stack Engineer in New York, NY vacancy
  •  ...Are you a software engineer who wants more control over what you build? Not just how you build it? Most engineers spend years owning...  ...complete workflows end-to-end. You'll work across AI, full-stack, real-time systems, and healthcare infrastructure — building the... 
    Senior
    Full time

    Alldus

    New York, NY
    5 hours ago
  • $160k - $260k

     ...Senior / Staff Full Stack Engineer $160,000–$260,000 base + equity | New York City | Hybrid About the Company SODA is partnered with an early-stage, venture-backed fintech rebuilding the financial operations behind the world's leading investment firms. Their... 
    Senior
    Full time

    Trust In SODA

    New York, NY
    5 hours ago
  • Bachelor’s degree or foreign equivalent in Computer Science, Mechanical Engineering, or related field and 10 years of progressive post-baccalaureate experience in the job offered or related occupation.5+ years of hands-on experience with NoSQL database management systems... 
    Senior

    MoTek Technologies

    New York, NY
    4 days ago
  • $180k - $230k

     ...Kiddom helps schools and districts deliver more equitable, effective, and adaptive learning experiences.We're looking for a Senior Full Stack Engineer to join our AI Experience Pod, the team behind Kiddom's flagship AI-powered experience for teachers and students. You'll... 
    Senior
    Permanent employment
    Local area
    Flexible hours

    Kiddom

    New York, NY
    3 days ago
  • $161k - $210k

    Senior Software Engineer Dealpath is the AI-powered operating system for institutional real estate investing — purpose-built to help the world's leading firms capture more opportunities, make faster decisions, and execute with precision. As a Senior Software Engineer here... 
    Senior
    Casual work
    Immediate start

    Dealpath

    New York, NY
    4 days ago
  • $250k - $350k

     ...cancellations, refunds, and bookings over chat and voice for some of the world's largest travel brands. We're looking for a senior full stack engineer to anchor this product, owning the realtime and voice layer end to end while building across React/TypeScript front ends,... 
    Senior
    Work experience placement
    Local area
    Remote work
    Work from home
    Relocation package

    Hopper

    New York, NY
    1 day ago
  • $106.9k - $147k

     ...operational and experience outcomes. This role provides operational engineering support, technical coordination, and platform enablement...  ....Position OverviewWe are seeking a highly motivated Senior Full-Stack Software Engineer to serve as the primary operational support... 
    Senior
    Full time
    Temporary work
    Apprenticeship
    Live in
    Immediate start

    Humana

    New York, NY
    3 days ago
  •  ...Senior Full Stack Engineer Lady Bird Talent is partnering with a Series C FinTech company based in New York City, close to Union Square. This position will be a Hybrid role, where every Tuesday and Thursday is in-office as a team. In the role of Senior Full Stack... 
    Senior
    Work at office
    Immediate start
    Relocation

    Lady Bird Talent

    New York, NY
    5 days ago
  • Our client is redefining the future of capital markets , creating a smarter, more sustainable financial ecosystem where innovation meets impact. They empower the world's leading banks, hedge funds, and asset managers to optimize portfolios, unlock new sources of capital...
    Senior

    Soul Staffing Solutions

    New York, NY
    3 days ago
  • $215k - $275k

     ...Senior Full Stack Engineer New York,NY, US Experience Senior Level Salary $215,000 - $275,000 per year Job Details We’re hiring software engineers to help design, build, and scale the core systems powering this platform. This is a highly cross functional... 
    Senior
    3 days per week

    Leoforce

    New York, NY
    5 days ago
  • $160k - $220k

    Senior Full-Stack Qlik Sense Engineer Location New York Business Area Engineering and CTO Ref # 10054313 Description & Requirements The mission of the Engineering Chief Operating Officer (COO) Office is to identify, evaluate, and address strategic... 
    Senior
    Temporary work
    For contractors
    Work experience placement
    Work at office

    Bloomberg

    New York, NY
    4 days ago
  •  ...environment with plenty of greenfield problems to solve and real influence over the product. 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... 
    Senior

    talentpluto

    New York, NY
    1 day ago
  • $235k - $250k

     ...place the best people in the right roles to drive long-term success for both clients and candidates. Title of Role: Senior Full Stack Engineer Location: Onsite, hybrid Company Stage of Funding: Series B - Software Development Office Type: Hybrid Salary... 
    Senior
    Work at office

    Recruiting from Scratch

    New York, NY
    1 day ago
  • $120k - $200k

    Senior Vice President, Full-Stack EngineerAt BNY, our culture allows us to run our company better and enables employees’ growth and success. As a...  ...a future team member for the role of Senior Full-Stack Engineer to join our middle office platform team. This role is located... 
    Senior
    Temporary work
    Work experience placement
    Work at office
    Worldwide

    The Bank of New York Mellon

    New York, NY
    3 days ago
  • Oddball is seeking a Senior Full Stack Engineer to join Oddball Labs as a senior technical contributor. You will design, build, and iterate across prototypes and production systems, collaborating with architects, designers, and engineers to explore ideas and shape technical... 
    Senior
    Remote job

    Devconnectplatform

    New York, NY
    3 days ago
  •  ...seRevel is an AI-native POC management platform built by Sales Engineers for Sales Engineers. We're early stage and small, which means the codebase is still shaped by whoever ships. You'll own features end to end: the Next.js frontend, the Node and Postgres backend, and... 
    Senior
    Remote work

    Jobleads-US

    New York, NY
    3 days ago
  •  ...building something groundbreaking. As a full-time team member, you won’t just shape the...  ...are actively looking for a full-time Full Stack Developer. Please note that this is a...  ...You will start as a Full Stack Software Engineer for Zealthy, joining a team of 5 full-time... 
    Senior
    Full time
    Remote work
    Monday to Friday
    Flexible hours

    Zealthy

    New York, NY
    1 day ago
  • $225k - $260k

     ...customers. Cohere is a team of researchers, engineers, designers, and more, who are all...  ...abilities and are comfortable working across the stack.You’re able to read and understand, and...  ...or other showcases of your projects.Full-Time Employees at Cohere enjoy these Perks... 
    Senior
    Full time
    Work at office
    Local area
    Remote work
    Home office

    Cohere

    New York, NY
    1 day ago
  •  ...Senior Software Engineer We are looking for senior software engineers for fully remote opportunities. If you're a glass-half-full "student of the game" that thrives on new challenges and cares...  ...with Node, Ruby, and other full-stack technologies is also important... 
    Senior
    Remote work

    Hire Life Recruiting and Consulting

    New York, NY
    4 days ago
  • $100k - $143k

     ...Role OverviewJoin Enterprise Intelligence as an Associate Product Engineer supporting the Decision Intelligence team. This role is designed...  ...at the point of decision-making.You will contribute across the full product lifecycle—from translating wireframes into production-... 
    Senior
    Internship
    Local area
    3 days per week

    New York Life Insurance Company

    New York, NY
    2 days ago
  •  ...Senior Full Stack Engineer We are seeking a Senior Full Stack Engineer (10+ years experience) to design, build, and scale modern web applications. The ideal candidate will have: Strong backend expertise in Java and Spring Boot Strong frontend expertise... 
    Senior

    InterSources

    New York, NY
    5 days ago
  • $120k - $200k

     ...We’re seeking a future team member for the role of Senior Vice President to join our Middle Office Engineering Platform team. This role is located in Pittsburgh or...  ..., Company or individual department/team performance, and market factors.Full timePosting Date: 2026-06-04
    Senior
    Temporary work
    Work at office
    Worldwide
    Flexible hours

    The Bank of New York Mellon

    New York, NY
    5 days ago
  •  ...Overview Awarded is looking for a senior full-stack engineer to join our lean & elite team. What Will You Do In Your First 3 Months # Redesign fundamental data models to meet new product requirements # Expand our powerful reporting system to be... 
    Senior

    Awarded Software

    New York, NY
    4 days ago
  • Citi is seeking a Full Stack Senior Engineer in Mississauga, Ontario, offering a hybrid role. You will lead applications development, design microservices, and guide teams across time zones to deliver scalable software within a regulated environment. Responsibilities include... 
    Senior

    Citi

    New York, NY
    4 days ago
  • Position Summary We are currently seeking a Senior Full-Stack Engineer to play a key role in shaping the future of our technology stack to drive the design and delivery of AI-powered applications across the firm. This is a hands-on, high-impact role that blends full-stack... 
    Senior

    Huxley Associates

    New York, NY
    4 days ago
  • $190k - $260k

     ...Senior Full Stack Engineer We are seeking a Senior Full Stack Engineer to own and scale a maritime awareness platform at a Series A defense technology company. This is a high-ownership, backend-leaning IC role where you will take features from concept to production... 
    Senior
    Relocation
    Visa sponsorship

    RIT Solutions

    New York, NY
    5 days ago
  • $150k - $220k

     ...grade features end to end. You'll work closely with designers, engineers, and product leaders who care deeply about the craft of...  ...solving meaningful problems. ~6+ years building and shipping full-stack web apps - experience with Next.js, React, TypeScript, or PostgreSQL... 
    Senior
    Full time
    Work at office

    Parambil

    New York, NY
    2 days ago
  • $160k - $185k

     ...Senior Full-Stack Engineer at Duet Duet is on a mission to transform primary care by empowering nurse practitioners (NPs) to own and operate their practices. By providing NPs with tailored products and services within a supportive setting, Duet is building the nation... 
    Senior
    Work at office
    Immediate start
    Flexible hours

    Duet Technologies Inc

    New York, NY
    5 days ago
  • We’re seeking a future team member for the role of Senior Director, Full-Stack Engineering to join our Data Solutions & Services team. This role is located in New York.In this role, you’ll make an impact in the following ways:Consult with internal business groups to provide... 
    Senior
    Worldwide
    Flexible hours

    The Bank of New York Mellon

    New York, NY
    2 days ago
  • CookUnity is seeking a Senior Full Stack Engineer for the Post Order Experience squad, reporting to the Engineer Manager. You’ll collaborate with a PM and designer to shape product strategy, OKRs, and roadmap while communicating with senior management. You’ll work on the... 
    Senior
    Remote job

    CookUnity

    New York, NY
    2 days ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Senior Full Stack Engineer. Be the first to apply!