Senior · Staff · Principal Fullstack Engineer

Lead Allies Inc

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San Francisco remote Until 8/22/2026 First posted March 18, 2026 Last posted March 18, 2026
Job description

Senior / Staff / Principal Fullstack Engineer

Location: Onsite San Francisco (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.  

About this role

Summary

Develop, maintain, and optimize front-end and back-end components collaborating with cross-functional teams.

Job title

Fullstack Engineer

Experience level

senior level

Industry

technology

Location requirements

Onsite in San Francisco; hybrid options available

Salary

Not specified

Management role

No

Skills & keywords

Required skills

htmlcssjavascriptreactangularvue.jsnode.jspythonrubyjavamongodbredisrestful APIsgitci/cdautomated testingproblem-solvingcollaboration

Preferred skills

None specified

Specializations

fullstackfront-endback-endui/uxserver-side
Locations

Structured locations inferred from the posting.

San Francisco, CA, USA

On-site City