Top Javascript Jobs in Peoria, IL

Seeking a Full-Stack JavaScript Developer to build web applications, test software systems, and ensure software quality in a collaborative remote environment.

Join Customizo as a Junior JavaScript Developer to begin your training as a ServiceNow Developer. You will learn through certification courses, mentorship, and project collaboration, while developing and optimizing solutions integrated with ServiceNow.

The Senior Full Stack JavaScript Developer will build and maintain user interfaces using React and Next.js, integrate with Node.js backends, and guide other developers. Responsibilities include ensuring accessibility, performance, and reliability of features, engaging in code reviews, and collaborating closely with product teams.

Design, build, and maintain internal monitoring and alerting for high-load real-time systems; automate production testing; troubleshoot and resolve performance issues; coordinate cross-team incident resolution; recommend architectural and process improvements; research vendor solutions and enforce security best practices.

Senior full‑stack engineer responsible for building backend services (Node.js/TypeScript) and integrating with frontends (React/Vue). Ship production APIs, collaborate cross‑functionally, own delivery, mentor peers, and develop modular, testable, performant systems across diverse greenfield projects.

Design and develop responsive cross-platform mobile applications using React Native and JavaScript, collaborating with teams and ensuring high app performance.

Develop and maintain cross-platform mobile apps using React Native and JavaScript, ensuring high performance and usability through coding, collaboration, and testing.

As a Software Engineer, you'll design and develop web applications and APIs, focusing on both front-end and back-end solutions while collaborating with cross-functional teams in an agile environment.

Build and maintain cloud- and browser-based AI and automation applications (internal and customer-facing). Integrate with third-party APIs (QuickBooks, Microsoft Graph, CRM, Zoom), implement AI workflows (OpenAI), automate business processes (Zoho, PowerAutomate), and ensure security and maintainability while working closely with leadership and IT.

Support enterprise-scale applications in secure environments. Develop UI components, collaborate with teams, and assist with Agile delivery and testing.

The role involves leading the development of a high-performance Web SDK for fraud detection and risk management, implementing algorithms for device fingerprinting, and ensuring security and performance optimization.

Seek a Senior React/JavaScript UI Developer for enterprise application support focusing on React, Vue, and secure coding principles within Agile.

Build end-to-end features in a JS/TS stack, designing scalable backend services and responsive real-time frontends. Improve observability, performance, and reliability, collaborate with product/design, and own full-stack implementation from APIs and data models to UI.

As a Senior Software Engineer at Flex, you'll design and maintain financial services architecture, mentor junior engineers, and ensure scalability and security for innovative financial products.

Build end-to-end features, design intuitive interfaces, manage asynchronous backend jobs, and contribute to open-source efforts, while leading project development from concept to monitoring.

Design and develop scalable backend systems for SaaS applications, mentor engineers, and lead projects while collaborating with cross-functional teams.

Seeking exceptional software engineers to build and maintain user-friendly backend systems primarily in Clojure and JavaScript, focusing on product complexities and user experience.

Join a small team to improve a tech product aimed at upskilling users in MENA, working with JavaScript and Node.js in a collaborative remote environment.

Develop and implement features by building backend APIs and frontend code, lead projects, and collaborate with teams to solve user problems.

The Backend Engineer will develop intricate backend systems, build performant APIs, and contribute to technology innovation at Entefy.

Seeking a full stack engineer to develop applications, requiring skills in Node.js, SQL, and modern JavaScript frameworks with a focus on scalability and performance.

The Senior Backend Software Engineer will build intricate backend systems, develop APIs, ensure high availability, and improve application scalability and performance.

Join the Entefy team as a Senior Full Stack Engineer to build a scalable full stack application enhancing digital interaction for global clients.

The Senior Full Stack Engineer will design and implement APIs with NodeJS, develop UIs with React, manage data pipelines, and deploy projects on AWS.

As a Senior Software Engineer (Backend), you will develop features, test and debug APIs, create technical documentation, and contribute to infrastructure solutions.