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Javascript Backend Developer Jobs in Saint Louis, MO

The Timberline Group

Angular Developer

Saint Louis, MO · On-site

$53.25 - $65.25/hr

Strong front-end / UI development skills: 2+ years JavaScript development, experience with HTML5 ... Working experience with back-end development technologies and tools such as Java containers (Tomcat ...

Nerdy

Staff Engineer

Saint Louis, MO · On-site

JavaScript, TypeScript Backend: Javascript, Java, Golang * Explicit mentoring of senior-level engineers regularly, leading to results. * Significant experience in AWS-based cloud architecture ...

Focus Financial Partners

BI & Data Engineer

Saint Louis, MO · On-site

$111K - $133K/yr

Programming: Solid Python skills for backend and application development, and working knowledge of JavaScript/TypeScript for frontend development. * Version Control & CI/CD: Experience with Git ...

Focus Financial Partners

BI & Data Engineer

Saint Louis, MO · Hybrid

$111K - $133K/yr

Programming: Solid Python skills for backend and application development, and working knowledge of JavaScript/TypeScript for frontend development. * Version Control & CI/CD: Experience with Git ...

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All JobsJavascript Backend Developer JobsJavascript Backend Developer Jobs in Saint Louis, MO

Javascript Backend Developer information

See Saint Louis, MO salary details

$11

$56

$82

How much do javascript backend developer jobs pay per hour?

As of Aug 7, 2026, the average hourly pay for javascript backend developer in Saint Louis, MO is $56.13, according to ZipRecruiter salary data. Most workers in this role earn between $46.06 and $66.39 per hour, depending on experience, location, and employer.

What does a JavaScript backend developer do?

A JavaScript Backend Developer is responsible for building and maintaining the server-side logic, databases, and APIs that power web applications. They use JavaScript, often with frameworks like Node.js, to process requests, manage data, and ensure smooth communication between the frontend and backend of an application. Their work ensures that web applications are scalable, secure, and efficient. JavaScript Backend Developers also collaborate with frontend developers and other team members to deliver seamless user experiences.

What are the key skills and qualifications needed to thrive as a JavaScript backend developer, and why are they important?

To thrive as a Javascript Backend Developer, you need strong proficiency in JavaScript (especially Node.js), knowledge of backend frameworks, and a solid understanding of databases such as MongoDB or PostgreSQL. Familiarity with development tools like Git, RESTful APIs, Docker, and cloud platforms, as well as relevant certifications, is highly valuable. Excellent problem-solving, teamwork, and communication skills help you collaborate effectively and deliver robust solutions. These abilities are crucial for building scalable, secure, and maintainable backend services that power modern applications.

What are the typical challenges a JavaScript backend developer faces when scaling applications for high traffic?

JavaScript Backend Developers, especially those working with Node.js, often encounter challenges related to handling high concurrency, optimizing database queries, and maintaining application performance under heavy load. Ensuring efficient memory management and implementing robust error handling are also critical when scaling. Working closely with DevOps and frontend teams to optimize APIs and monitor system health is essential for delivering reliable, scalable backend solutions.

What is the difference between Javascript Backend Developer vs Javascript Frontend Developer?

AspectJavascript Backend DeveloperJavascript Frontend Developer
Primary FocusServer-side development, APIs, databasesUser interface, client-side interactions
Required SkillsNode.js, databases, server managementHTML, CSS, JavaScript, UI frameworks
Work EnvironmentBack-end servers, cloud platformsWeb browsers, client devices
Common UsageBuilding APIs, server logicDesigning web pages, user experience

The main difference between a Javascript Backend Developer and a Javascript Frontend Developer lies in their focus areas. Backend developers handle server-side logic, databases, and APIs, while frontend developers focus on creating engaging user interfaces and client-side interactions. Both roles require JavaScript skills but apply them in different parts of web development projects.

What are popular job titles related to Javascript Backend Developer jobs in Saint Louis, MO? For Javascript Backend Developer jobs in Saint Louis, MO, the most frequently searched job titles are:
What job categories do people searching Javascript Backend Developer jobs in Saint Louis, MO look for? The top searched job categories for Javascript Backend Developer jobs in Saint Louis, MO are:
What cities near Saint Louis, MO are hiring for Javascript Backend Developer jobs? Cities near Saint Louis, MO with the most Javascript Backend Developer job openings:
Javascript Backend Developer jobs near you
Infographic showing various Javascript Backend Developer job openings in Saint Louis, MO as of August 2026, with employment types broken down into 87% Full Time, and 13% Contract. Highlights an 87% In-person, and 13% Remote job distribution, with an average salary of $116,751 per year, or $56.1 per hour.

Full Stack Java Developer

Synthesis Systems

Creve Coeur, MO

$49.25 - $63.50/hr

Contractor

Re-posted 18 days ago

Job description

Company Description

Synthesis has extensive experience building large-scale, enterprise systems for government and commercial clients. We specialize in developing AI, Big Data, Data Analytics, iOS, Android, JEE, Portals, and database-driven applications. Our extensive knowledge spans across all application tiers. Since, we were founded in 2003, Synthesis has been delivering large-scale systems based on design patterns, service-oriented architectures, dynamic and intutive web interfaces, and web services. Our clients include Fortune 100 companies and a number of government agencies.

Job Description

The Full Stack Developer provides frontend and backend development support. The successful candidate will also provide best practices to design single-page architecture (SPA) applications and micro services using cutting edge and open source technologies including J2EE, Node.JS, RESTful, HTML5, Angular, JavaScript, and AWS technologies. The individual will work in an agile environment to support short sprints and rapid delivery of releases.

Qualifications

Hands on experience on React JS,NodeJS, Redux, Java and Postgres SQL on AWS platform

Hands on experience on Vue. JS, Java and Postgres SQL on AWS platform 

Overall 6+ years of Candidate experience needed

Good Communication skills

Hands on Experience on the JS

Must have experience :

NodeJS

ReactJs

AWS

Micro-Services 

Additional Information

All your information will be kept confidential according to EEO guidelines.

This is a contract position and independent contractors welcomed.

Apply