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Javascript Typescript Developer Per Diem Jobs in Illinois

Paul Murphy Associates

React Developer

Chicago, IL · Hybrid

$107K - $125K/yr

React Developer Contract Type: C2C or W2 Duration: On-going / long-term Location: Chicago, IL ... Strong JavaScript/TypeScript, HTML, and CSS skills. * Experience consuming REST APIs. * Familiarity ...

R2 Technologies Corporation

Angular Developer

Chicago, IL · On-site

$56.50 - $69/hr

Angular Developer Location: Onsite Chicago Duration: 6 months • You will also be a strong ... CSS, JavaScript, Typescript (Advanced knowledge of JavaScript, CSS, and HTML) Experience of ...

Laksan Technologies

Java Fullstack Developer

Chicago, IL · On-site

$54 - $69.75/hr

Java Fullstack Developer Location: Chicago, Illinois Job Type: C2C Onsite Long-term We are looking ... Solid understanding of front-end technologies (HTML5, CSS3, JavaScript, TypeScript).Experience ...

Edgehog Trading

Full Stack Developer

Chicago, IL · On-site

... in JavaScript/TypeScript, Python, and related frameworks, with a track record of building and ... developers and traders • Solid understanding of software engineering fundamentals -- data ...

Hudson River Trading

Fullstack Developer

Chicago, IL · On-site

Experience working with JavaScript or TypeScript * Strong verbal and written communication skills ... USD per year (or local equivalent). The base pay offered may vary depending on multiple ...

1 point system

Python Full Stack Engineer

Chicago, IL · On-site

Role Overview We are seeking an experienced Senior Full Stack Software Engineer to lead development ... JavaScript / TypeScript (mandatory) * Node.js * React.js for UI development * Python (including ...

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Javascript Typescript Developer Per Diem information

What are the most commonly searched types of Javascript Typescript Developer jobs in Illinois? The most popular types of Javascript Typescript Developer jobs in Illinois are:
What cities in Illinois are hiring for Javascript Typescript Developer Per Diem jobs? Cities in Illinois with the most Javascript Typescript Developer Per Diem job openings:
Javascript Typescript Developer Per Diem jobs near you
Infographic showing various Javascript Typescript Developer Per Diem job openings in Illinois as of July 2026, with employment types broken down into 81% Full Time, 7% Part Time, 1% Temporary, and 11% Contract. Highlights an 83% Physical, 4% Hybrid, and 13% Remote job distribution.

Javascript/Typescript API Developer

e-Bit Consulting LLC

Chicago, IL • On-site

Other

Posted 16 days ago

Job description

We are seeking an experienced Javascript/Typescript API Integration Developer to design, develop, and maintain integrations between our platform and third-party APIs using JavaScript, TypeScript, and Node.js. The ideal candidate has strong experience building reliable REST API integrations, writing clean, maintainable code, and delivering high-quality integration solutions.

Experience with workflow automation platforms such as n8n, Zapier, or Make is a plus, particularly for building reusable automation workflows and custom connectors.

Responsibilities

  • Design, develop, and maintain scalable API integrations using JavaScript, TypeScript, and Node.js.
  • Build robust integrations with REST APIs, including authentication, pagination, rate limiting, retries, and error handling.
  • Develop clean, modular, and maintainable code following modern software engineering best practices.
  • Create reusable libraries and integration components that can be leveraged across multiple projects.
  • Write unit and integration tests using tools such as Playwright or Jest.
  • Optimize API interactions through JSON transformation, schema validation, batching, caching, and retry strategies.
  • Troubleshoot integration issues and improve performance, reliability, and scalability.
  • Collaborate with product managers, QA engineers, and other developers throughout the software development lifecycle.
  • Produce clear technical documentation for APIs, integration workflows, and implementation details.
  • Follow best practices for secure credential management, dependency management, and application security.
  • Contribute to CI/CD pipelines and deployment automation.

Nice to Have

  • Build and maintain automation workflows using n8n, Make, Zapier, or similar workflow automation platforms.
  • Develop custom n8n nodes or connectors.
  • Implement webhook-based integrations and event-driven workflows.
  • Experience contributing to open-source integration projects.

Qualifications

Required

  • Bachelor''s degree in Computer Science, Engineering, or equivalent practical experience.
  • 3+ years of JavaScript and TypeScript development.
  • 2+ years of Node.js development.
  • Strong experience integrating RESTful APIs.
  • Solid understanding of asynchronous programming and modern JavaScript patterns.
  • Experience with Git and modern package management tools (npm or pnpm).
  • Experience writing automated tests using Jest, Playwright, or similar frameworks.
  • Strong understanding of JSON, API payloads, and schema validation.
  • Excellent debugging and problem-solving skills.

Preferred Qualifications

  • Experience with workflow automation platforms such as n8n, Make, Zapier, or Power Automate.
  • Experience building custom connectors or plugins for automation platforms.
  • Familiarity with webhook-based integrations.
  • Experience with SQL and/or NoSQL databases.
  • Experience with Docker and CI/CD pipelines.
  • Contributions to open-source projects or public GitHub repositories.
  • Familiarity with OAuth2, OpenAPI specifications, and API documentation tools.

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