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# Senior Full-Stack SaaS Engineer - React, TypeScript, and MySQL (PT-US)

- **Company:** Arc Full-time
- **Location:** San Francisco, CA, United States (Remote available)
- **Experience:** Expert
- **Contract:** Temporary contract
- **Skills:** Artificial Intelligence, Application Performance Management, Optical Character Recognition (OCR), Automation of Tests, Software as a Service, Cloud Computing, Software Quality, Code Review, Continuous Integration, Data Mining, Relational Databases, Software Debugging, MySQL, TypeScript, ReactJS, Backend, Front End Software Development, Document Classification
- **Published:** July 12, 2026
- **Apply:** https://arc.dev/signup?userType=developer&publicRandomKey=p3tf1pn3tt&to=https%3A%2F%2Farc.dev%2Fdashboard%2Fd%2Fverified-jobs%2Fp3tf1pn3tt%2Fapplication

## About the Role

ReactTypeScriptMySQLCI/CD, English・Professional, * Strong professional experience with React for building production applications.

 * Extensive experience in TypeScript across both frontend and backend development.
 * Solid experience working with MySQL or similar relational databases.
 * Proven track record of contributing to large-scale production codebases.
 * Excellent debugging and problem-solving skills.
 * Ability to understand and work within established architectural frameworks without unnecessary rewrites.
 * Proficiency with Git-based development workflows and code reviews.
 * Capability to work independently while integrating seamlessly with an existing engineering team.
 * Strong product mindset with a keen attention to user and business impact., * Experience in building or maintaining B2B SaaS products.
 * Familiarity with logistics, supply chain, shipping, trade operations, or document-management platforms.
 * Experience with document classification, data extraction, OCR, or AI-assisted workflows.
 * Understanding of workflow automation and business process software.
 * Experience supporting applications with active enterprise customers and handling high data volumes.
 * Familiarity with automated testing, CI/CD, cloud infrastructure, and production monitoring.
 * Previous experience in a product-first startup or growth-stage software company.

## Description

We are seeking an experienced Senior Full-Stack SaaS Engineer to join our team, focusing on enhancing and supporting an established SaaS platform used by commodity trading companies. This platform plays a critical role in managing complex shipment operations, enabling customers to organize and classify shipping documents, extract structured data from unstructured files, and execute various shipment-related workflows efficiently. As part of our team, you'll contribute to a high-volume, business-critical application, working within a mature codebase, and collaborating with our engineering team in San Francisco., * Contribute to the ongoing development and enhancement of a production SaaS application.

 * Build and improve frontend functionality using React and TypeScript.
 * Develop and maintain backend services and logic, leveraging TypeScript.
 * Work with MySQL databases, handling queries, schemas, and data models.
 * Add new product features and refine existing shipment-management workflows.
 * Handle document-heavy processes, including classification, data extraction, and structured record management.
 * Investigate and resolve bugs, implementing reliable and maintainable solutions.
 * Navigate and effectively contribute to a large, mature codebase.
 * Enhance application performance, scalability, reliability, and code quality.
 * Participate in code reviews and collaborate closely with internal engineering and product teams.
 * Communicate technical risks, dependencies, and progress clearly and effectively.


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