Senior Full-Stack Engineer - New York - Mission

    Mission
    Mission New York

    5 days ago

    Description

    4 days a week at the office

    This position requires U.S. work authorization; only U.S. citizens or permanent residents will be considered.

    Our company description


    Mission is a platform for hiring, vetting and managing software development talents. It enables our clients to connect with the world's best talent to build mission‑critical software products.

    About the client


    An AI-native procurement platform that uses intelligent sourcing agents to automate procurement workflows, helping enterprises buy faster, smarter, and more efficiently across industries like manufacturing and retail.

    Backed by top-tier investors, the founding team brings deep expertise in procurement, AI, and software engineering, offering the chance to join an early team building a category-defining product

    About the Role


    We're hiring a Senior Full-Stack Software Engineer to become a cornerstone of our early technical team. You'll build critical features end-to-end across the platform, owning major components in both the frontend (React + TypeScript) and backend / NestJS / PostgreSQL), while also managing and scaling our AWS infrastructure.

    This is a senior, backend-leaning full-stack role (≈60–70% backend) for an experienced startup builder who can independently ship production systems, make architectural decisions, and own problems end-to-end. With no heavy process or layers of management, engineers drive roadmap, technical direction, and delivery.

    You'll integrate AI/LLM services into production systems, collaborate closely with AI/ML engineers, contribute to architectural decisions, and help shape the engineering culture. Candidates with experience leading small teams or mentoring others are especially encouraged—this role has room to grow into Technical Lead as the company scales.

    What You'll Do

    • Build and scale core platform features across the fullstack
    • Develop and ship AI agents and LLM workflows in production
    • Own parts of AWS infrastructure and deployments
    • Implement embeddings, vector search, and retrieval systems
    • Shape architecture and technical trade-offs
    • Mentor engineers and contribute to planning and execution

    Teck Stack

    • Frontend: React, TypeScript
    • AI & Data: LLM APIs, embeddings, vector search, ETL
    • Infrastructure: AWS (ECS, Fargate, Lambda, S3, RDS), Terraform, Docker

    What We're Looking For

    • 6+ years full-stack experience, including startup environments (at least2 years)
    • Strong and system design skills
    • Solid React + TypeScript
    • Experience integrating AI/LLM features into production
    • Hands‑on AWS and infrastructure as code
    • Highly autonomous; comfortable owning decisions and outcomes
    • Experience mentoring or leading projects

    Why This Role

    • Competitive salary + meaningful equity
    • Flexible PTO and full benefits
    • Hybrid NYC team
    • Direct access to founders
    • Ownership of core systems and real, measurable impact

    #J-18808-Ljbffr

  • Work in company

    Full Stack Engineer

    Only for registered members

    Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin suscipit turpis ac quam consectetur, vitae rutrum enim luctus. · Mauris egestas eleifend orci. Praesent vestibulum vitae enim ac vulputate. ...

    New York Full time

    1 month ago

  • Work in company

    Full Stack Engineer

    Only for registered members

    We have urgent openings for Full Stack Engineer. · ...

    New York

    1 month ago

  • Work in company

    Full Stack Engineer

    Only for registered members

    This is an opportunity to join the founding team right before they look to triple in size. · ...

    New York

    3 weeks ago

  • Work in company

    Full Stack Engineer

    Only for registered members

    This high-growth AI technology company builds advanced machine learning solutions for the finance industry. They are seeking a Senior Full Stack Engineer to design and build end-to-end solutions for their AI-driven analytics platform. · Own the full software development lifecycle ...

    New York

    1 month ago

  • Work in company

    Full Stack Engineer

    Only for registered members

    My client, a scaling Fintech startup, is seeking a Full-stack Software Engineer to lead the development of their next-gen Data and AI products for the world's most sophisticated hedge funds. · This isn't just maintaining code; it's about owning the product lifecycle in an environ ...

    New York $80,000 - $150,000 (USD) per year

    2 days ago

  • Work in company

    Full Stack Engineer

    Only for registered members

    This is a contract opportunity. · Fully onsite in New York, · NY. Build and maintain scalable data · and application pipelines across the full stack. ...

    New York

    1 month ago

  • Work in company

    Full Stack Engineer

    Only for registered members

    A top-tier quantitative trading firm is looking for Full Stack Software Engineers to join a high-impact engineering team building platforms used directly by traders researchers and production systems. · This role involves working across modern React-based frontends and Python and ...

    New York

    1 month ago

  • Work in company

    Full Stack Engineer

    Only for registered members

    Full-Stack Developer · Our client is a rapidly growing SaaS company based in New York City that was recently acquired and is entering an exciting new phase of growth and innovation. With over 100 employees and a team composed of top-tier engineering talent, they are building scal ...

    New York $80,000 - $150,000 (USD) per year

    1 day ago

  • Work in company

    Full Stack Engineer

    Only for registered members

    Full Stack Engineer - New York City · Prime Search is working with a startup at the intersection of climate and fintech that makes sustainable building upgrades like heat pumps, batteries, and EV chargers more affordable and accessible. Their mission is to accelerate the electri ...

    New York $80,000 - $150,000 (USD) per year

    1 week ago

  • Work in company

    Full Stack Engineer

    Only for registered members

    The Full Stack Engineer will design, develop and maintain scalable high-performance applications across the full technology stack. · ...

    New York

    3 weeks ago

  • Work in company

    Full Stack Engineer

    Only for registered members

    I'm working with a fast-growing AI startup building a next-gen system to modernize how a traditional industry manages customer relationships. · This is a full-stack role where you'll build core product features end-to-end, blending modern web development with LLM-powered automati ...

    New York

    1 month ago

  • Work in company

    Full Stack Engineer

    Only for registered members

    +Job summary · Product-Focused Full-Stack Software Engineer · What You'll Work OnDelivering full-stack features across backend services and frontend interfaces ...

    New York

    1 month ago

  • Work in company

    Full-Stack Engineer

    Only for registered members

    We are hiring for the position of Backend-leaning Full Stack Engineer to support our regulated medical billing platform. · ...

    New York

    1 month ago

  • Work in company

    Full-Stack Engineer

    Only for registered members

    We are seeking Senior Member of Technical Staff to take ownership of high-impact user-facing systems and contribute meaningfully across the stack. · ...

    New York Full time

    1 month ago

  • Work in company

    Full Stack Engineer

    Only for registered members

    We are a seed-stage startup helping hospitals manage patient nutrition safely and efficiently. It's a huge, overlooked market, where food is both medicine and logistics.For patients, that means a mobile app where they or their caregivers can order meals that are safe for their co ...

    New York

    1 month ago

  • Work in company

    Full Stack Engineer

    Only for registered members

    My client, a scaling · Fintech startup · , is seeking a · Full-stack Software Engineer · to lead the development of their next-gen Data and AI products for the world's most sophisticated hedge funds. · This isn't just maintaining code; it's about owning the product lifecycle in a ...

    New York, NY $80,000 - $150,000 (USD) per year

    1 day ago

  • Work in company

    Full Stack Engineer

    Only for registered members

    We are seeking Senior Full Stack Engineers to design build and own high-impact features across modern web applications and distributed backend systems.This role offers strong technical ownership close collaboration with product teams and exposure to complex financial systems. · ...

    New York

    1 month ago

  • Work in company

    Full Stack Engineer

    Only for registered members

    We're hiring Senior and Staff-level Full-Stack Software Engineers (5–10 years of experience) to join our fast-paced engineering team in New York City.You'll play a critical role in building and scaling our cross-platform desktop application, working across the stack — from modern ...

    New York $200,000 - $300,000 (USD)

    3 weeks ago

  • Work in company

    Full Stack Engineer

    Only for registered members

    Join us in shaping the future of financial services and defining new possibilities with AI. · writing clean efficient code collaborating with cross-functional teamsoptimizing applications for maximum performancecontributing to the overall design and architecture of our financial ...

    New York

    1 month ago

  • Work in company

    Full Stack Engineer

    Only for registered members

    We are searching for a Senior Full Stack Software Engineer to join our client, a well-established alternative investment firm managing over $20B in assets. · You will be part of a small, high impact engineering team responsible for building and maintaining internal software used ...

    New York

    1 month ago

  • Work in company

    Full Stack Engineer

    Only for registered members

    We are looking for a full-stack engineer to join the team and build products as well as features to help customers maximize success. · ...

    New York

    1 month ago

Jobs
>
Senior fullstack engineer
>
Jobs for Senior fullstack engineer in New York City