# Full-stack developer (Ruby/React)

> Walter · United States (Remote) · — · Posted 2026-05-07

**Workplace:** remote

**Department:** Toptal

## Description

**\[Summary\]**  
A leading collaborative design platform is seeking an experienced backend-focused engineer to enhance and evolve an integration-driven application. The project is centered on building and maintaining robust integrations using Ruby on Rails and TypeScript, with a strong emphasis on designing, implementing, and scaling connections with third-party systems.

The role will contribute to improving reliability, extensibility, and overall integration architecture across the platform.

**\[General information\]**  
They are looking for a senior-level engineer with strong experience in Ruby on Rails and TypeScript, and a proven background in building and maintaining complex integrations. The ideal candidate is comfortable working with multiple external APIs, designing integration workflows, and collaborating closely with product and engineering teams.

**\[Task and Deliverables\]**

-   Design, develop, and maintain backend services using Ruby on Rails to support integrations.
-   Build and extend integration logic using TypeScript, ensuring reliability and scalability.
-   Integrate the platform with third-party APIs and external systems.
-   Collaborate with internal teams to define integration requirements and technical solutions.
-   Improve existing integration architecture with a focus on maintainability, performance, and observability.
-   Document integration flows and provide technical recommendations for future improvements.  
    
-   **\[Engagement highlights\]**
-   Opportunity to work on high-impact integrations used by thousands of end users.
    
-   Collaborative environment with experienced engineers.
    
-   Potential for long-term collaboration based on performance and project outcomes.

## Requirements

**\[Required Experience\]**

-   Strong experience with Ruby on Rails in production environments.
    
-   Experience with TypeScript.
    
-   Proven background building and maintaining integrations with third-party APIs.
    
-   Solid understanding of RESTful APIs, webhooks, and asynchronous workflows.
    
-   Experience working in collaborative, cross-functional engineering teams.
    
-   Experience integrating identity services, especially using OAuth.
    

**\[Nice to have\]**

-   Hands-on experience with **Google APIs** (Calendar, Chat, etc.) and app integrations.
    
-   Familiarity with **MCP (Model Context Protocol)**.
    
-   Prior experience building integrations for SaaS or productivity tools.

## Apply

[Apply at Walter](https://apply.workable.com/walter-careers/j/609FAAB216/apply)

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