Senior · Staff · Principal Fullstack Engineer

lai· Engineering
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📍 New YorkFullTime

About this role

Senior / Staff / Principal Fullstack Engineer

Location: Onsite New York (5 days onsite AND hybrid options)

We have multiple startups interested in talent. Here is a generic summary. Instead of a perfect job description, we present talented individuals to companies and allow them to share how that talent fits in the organization. 

Key Responsibilities:

  • Developing and maintaining both front-end and back-end components:
    This includes writing code in various programming languages, designing user interfaces, and creating server-side logic.

  • Collaborating with cross-functional teams:
    Working with product managers, designers, and other engineers to define requirements, design features, and ship new products.

  • Ensuring the technical feasibility of UI/UX designs:
    Understanding how to implement designs effectively and ensure they perform well.

  • Writing clean, maintainable, and efficient code:
    Following coding standards and best practices to create code that is easy to understand, debug, and modify.

  • Optimizing applications for speed and scalability:
    Tuning code and infrastructure to ensure the application can handle a large volume of traffic and perform well.

  • Troubleshooting, debugging, and upgrading existing software:
    Identifying and resolving issues in existing software and ensuring it is kept up-to-date with the latest technologies.

  • Implementing secure coding practices:
    Protecting data and ensuring the application is resistant to vulnerabilities.

  • Participating in code reviews:
    Providing constructive feedback on the code of other developers and ensuring code quality.

  • Creating and maintaining software documentation:
    Documenting the application's architecture, code, and usage for future reference.

  • Managing hosting environments:
    Setting up and maintaining the infrastructure on which the application runs, including database administration and scaling.

Required Skills:

  • Proficiency in front-end technologies: HTML, CSS, JavaScript, and popular frameworks like React, Angular, or Vue.js.

  • Proficiency in back-end technologies: Server-side languages like Node.js, Python, Ruby, or Java, and database technologies like MySQL, PostgreSQL, MongoDB, or Redis.

  • Understanding of RESTful APIs and web services: Knowledge of how to design and implement APIs for communication between different systems.

  • Experience with version control systems: Git.

  • Experience with CI/CD pipelines and automated testing frameworks: Understanding how to automate the software development lifecycle.

  • Problem-solving and critical thinking skills: The ability to analyze complex problems and develop effective solutions.

  • Communication and collaboration skills: The ability to effectively communicate with cross-functional teams and work together to achieve shared goals.

Compensation: Market range and can include equity – details can be provided after the specific client is determined.  

Frequently Asked Questions

Is the salary disclosed for the Senior · Staff · Principal Fullstack Engineer position at lai?
The salary for this Senior · Staff · Principal Fullstack Engineer role at lai is not publicly listed. Click "Apply Now" to learn more about the compensation package on their official careers page.
Where is the Senior · Staff · Principal Fullstack Engineer position at lai located?
This Senior · Staff · Principal Fullstack Engineer role at lai is based in New York. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Is the Senior · Staff · Principal Fullstack Engineer role at lai full-time or part-time?
This is listed as a FullTime position. It is posted as a Senior · Staff · Principal Fullstack Engineer role in the Engineering department at lai.
Which team or department does the Senior · Staff · Principal Fullstack Engineer at lai belong to?
This Senior · Staff · Principal Fullstack Engineer position is part of the Engineering department at lai. See the full job description for more information about the team structure and responsibilities.
How do I apply for the Senior · Staff · Principal Fullstack Engineer position at lai?
Click the "Apply Now" button on this page. You will be redirected to lai's official application portal hosted on ashby where you can submit your application directly.
When was the Senior · Staff · Principal Fullstack Engineer job at lai posted?
This Senior · Staff · Principal Fullstack Engineer position at lai was posted on Aug 4, 2025. Apply as soon as possible — early applications are often reviewed first.
Senior · Staff · Principal Fullstack Engineer
lai
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