Software Engineer

Haystack
San Francisco, California, United StatesFull-time$167,100–$250,700Posted Aug 30, 2026

About the role

We're hiring on behalf of a Haystack partner!

The Role

  • Design, develop, and maintain enterprise-grade full stack applications used across engineering organizations.
  • Build modern web UIs using React, TypeScript, and modern frontend frameworks.
  • Develop scalable backend services and APIs using Python, Node.js, FastAPI, Express, or similar technologies.
  • Design and implement RESTful and GraphQL APIs.
  • Build and optimize large-scale data platforms leveraging SQL and NoSQL databases.
  • Integrate AI/ML and LLM technologies into internal engineering workflows.

What You'll Need

  • Bachelor's, Master's, or PhD in Computer Science, Computer Engineering, or related field.
  • 8+ years of professional software development experience.
  • Strong experience building and deploying full stack web applications.
  • Expert-level programming skills in Python.
  • Strong experience with JavaScript/TypeScript and Node.js.
  • Experience developing modern front-end applications using React.
  • Experience building REST APIs and microservices.
  • Strong understanding of software design patterns, object-oriented programming, and distributed systems.
  • Experience with relational databases such as PostgreSQL, MySQL, or SQL Server.
  • Experience with NoSQL databases such as MongoDB.
  • Experience with Git-based development workflows.
  • Experience working in Linux environments.
  • Strong debugging, performance tuning, and problem-solving skills.
  • Excellent communication and collaboration skills.

What's On Offer

  • Competitive annual salary ($167,100 - $250,700) plus bonus potential and RSU grants.
  • Opportunity to work on mission-critical engineering platforms used by thousands of engineers.
  • Collaborate with cross-functional teams to deliver impactful tools.
  • Develop and scale modern web applications, automation platforms, data services, and AI-enabled solutions.

Apply via Haystack today!

Responsibilities

  • Design, develop, and maintain enterprise-grade full stack applications
  • Build modern web UIs using React, TypeScript, and modern frontend frameworks
  • Develop scalable backend services and APIs using Python, Node.js, FastAPI, Express
  • Design and implement RESTful and GraphQL APIs
  • Build and optimize large-scale data platforms leveraging SQL and NoSQL databases
  • Integrate AI/ML and LLM technologies into internal engineering workflows

Qualifications

  • Bachelor's, Master's, or PhD in Computer Science, Computer Engineering, or related field
  • 8+ years of professional software development experience
  • Strong experience building and deploying full stack web applications
  • Expert-level programming skills in Python
  • Strong experience with JavaScript/TypeScript and Node.js
  • Experience developing modern front-end applications using React
  • Experience building REST APIs and microservices
  • Strong understanding of software design patterns, object-oriented programming, and distributed systems

Benefits

  • Competitive annual salary plus bonus potential and RSU grants
  • Opportunity to work on mission-critical engineering platforms
  • Collaborate with cross-functional teams to deliver impactful tools
  • Develop and scale modern web applications, automation platforms, data services, and AI-enabled solutions

Skills mentioned

PythonJavaScriptTypeScriptReactNode.jsREST APIsGraphQLSQLMongoDBGit

About Haystack

Haystack combines AI & expert vetting to deliver world-class tech candidates who are engaged, aligned, and ready to interview. We're trusted by over 400,000+ tech candidates, working in Software Engineering, Data, Design, DevOps, Cloud, Tech Management, Testing, Product & Delivery, Architecture and more. 100s of employers from startups and scale-ups like Atom Bank, DuckDuckGo and Goodlord to established enterprises like American Express, Dunelm and AWS use Haystack to connect with qualified tech talent that they can't find anywhere else.

Technology51-200 employeesNewcastle upon Tyne, England