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Javascript Backend Developer Jobs in Saint Louis, MO

Build-A-Bear Workshop

Developer

Saint Louis, MO · On-site

... front-end & back-end • Perform debugging, troubleshooting, and root cause analysis for ... SQL, PostgreSQL) • Proficiency working with HTML, CSS, & JavaScript frameworks (eg. React) • ...

Palnar

Sr. Java Full Stack Developer

O Fallon, MO · On-site

$49 - $63.25/hr

Deep understanding of JavaScript and it's benefits and quirks. Proven experience building ADA and ... development Backend Skills Java 17 Spring Boot 3.x SQL / Hibernate / JPA Data Structure ...

Fabergent

C# Developer (Jr and Sr Roles)

Saint Louis, MO

$53 - $70/hr

HTML5 and Angular JS or similar JavaScript libraries Strong knowledge of object-oriented ... NET Experience with Entity Framework Experience with using SQL Server as a backend preferred Must ...

The Timberline Group

Angular .Net Developer

Saint Louis, MO · On-site +1

$53.25 - $65.25/hr

The role is full stack, so the candidate should have good experience on both front and back end ... NET work experience. • Proficient in HTML5, JavaScript, and CSS. • User interface and graphic ...

Synthesis Systems

Full Stack Java Developer

Creve Coeur, MO · On-site

$49.25 - $63.50/hr

The Full Stack Developer provides frontend and backend development support. The successful ... Angular, JavaScript, and AWS technologies. The individual will work in an agile environment to ...

Synthesis Systems

Full Stack Java Developer

Creve Coeur, MO · On-site

$49.25 - $63.50/hr

The Full Stack Developer provides frontend and backend development support. The successful ... Angular, JavaScript, and AWS technologies. The individual will work in an agile environment to ...

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Showing results 21-40

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 Developer 729

Freedom Technology Solutions Group

Saint Louis, MO • On-site

Full-time

Medical, Life, Retirement, PTO

Posted 19 days ago

Job description

Freedom Technology Solutions Group is seeking a Full Stack Software Engineer to develop modern cloud-native applications supporting mission-critical intelligence and geospatial platforms. You will design, develop, and maintain user interfaces, APIs, backend services, and cloud-native microservices that enable analysts and mission partners to securely discover, process, and exploit geospatial data.
This is a hands-on software engineering role working across the full technology stack from responsive web applications to scalable backend services and cloud infrastructure.
Responsibilities:
  • A
  • Design and develop modern web applications
  • Develop RESTful APIs and backend services
  • Build cloud-native microservices
  • Develop responsive user interfaces
  • Integrate with geospatial services and enterprise APIs
  • Build automated testing pipelines
  • Participate in Agile development
  • Support CI/CD deployments
  • Optimize application performance
  • Troubleshoot production systems
  • Collaborate with architects, data scientists, and mission stakeholders to gather, document, and refine customer requirements, including data mapping and integration needs
  • Assist in implementing integration solutions in collaboration with development team members
  • Facilitate communication between stakeholders to ensure timely and effective requirements execution
  • Ensure activities align with established processes, standards, and mission objectives
  • Contribute to documentation of processes, procedures, integration patterns, and lessons learned

Key Technologies:
  • Familiarity with backend systems and integration concepts (APIs, data mapping, file-based transfers)
  • Experience with AWS services (S3, Lambda, SQS, SNS, ECS, ECR, EKS, API Gateway, Cloudwatch, KMS)
  • Familiarity with CI/CD pipelines (GitLab CI/CD or similar)
  • Understanding of containerized and serverless environments
  • Familiarity with data transfer and file processing concepts
  • Familiarity with dashboards, metrics, and operational visibility tools
  • Understanding of secure data handling and access control concepts (IAM, least privilege)

Frontend
  • JavaScript - React, Angular, HTML5, CSS3

DevOps
  • Docker, Podman, Kubernetes
  • GitLab, Harbor
  • CloudFormation, CDK, Terraform, other IaaC
  • Linux

Backend
  • Auroa, PostgreSQL/PostGIS, Oracle (w/spatial)
  • KVS - Redis, Memcache, Elasticache
  • GDAL/OGR etc.
  • Other storage tech (s3, NFS, CIFS, SAMBA, NAS, SAN, DAS, etc)

Required Qualifications:
  • Active TS/SCI clearance (eligible for CI Poly)
  • 1-3(Junior), 3-7(Journeyman), 8-11 (Senior), >12 (Principal) years of experience in software development, system integration, or technical support roles
  • Experience working directly with customers or stakeholders in a technical or mission environment
  • Strong communication and coordination skills across technical and non-technical teams
  • Experience gathering and documenting requirements
  • Ability to manage multiple tasks and priorities in a dynamic environment
  • Familiarity with Agile development practices
  • Experience using GitLab or similar tools for collaboration and tracking

Desired Qualifications:
  • Familiarity secure data movement environments
  • Experience working with enterprise service processes such as Service+
  • Development or scripting experience (Python, JavaScript, or similar)
  • Experience with data mapping or integration workflows (using JSON or other object notation)
  • Familiarity with operational dashboards and metrics reporting
  • Experience supporting customer requirement implementation and/or system integration efforts
  • Experience building cloud-native applications
  • Experience with microservices
  • Experience with geospatial applications
  • Experience with mapping frameworks
  • Experience with GDAL or geospatial libraries
  • Experience supporting Intelligence Community customers

What's in It for You?
Flexible work environment
A team mentality - work with friendly, like-minded professionals
Work with innovative, cutting edge technologies
Enjoy extremely competitive compensation and benefits
A work-life balance you can count on
Opportunities to grow and advance your career on our dime
The Benefits You Get with Freedom
Amazing benefits including matching 401k, fully paid medical, and more
Generous paid time off - including paid site closure days
Competitive salary offerings
Paid training and tuition reimbursement
Referral bonuses
Fully paid life and disability
Annual logo wear allowance
Company sponsored events (game nights, holiday party, summer party, happy hours)
Interested in learning more about Freedom and our culture? Contact us today! We're constantly hosting hiring events in our office and elsewhere, to help you get a sense of what life is like at Freedom before joining the team.
As an Equal Opportunity Employer, we do not discriminate on the basis of race, color, religion, sex, age, marital status, disability or veteran status
Applicant Federal & E-Verify Postings
VEVRAA Federal Contractor
Accessibility: If you need an accommodation as part of the employment process, please contact Human Resources at
Phone: 410-290-9035
Email: recruiting@goftsg.com
Equal Opportunity Employer, including disabled and veterans.
If you want to view the EEO Law poster, please choose your language: English - Spanish - Arabic - Chinese
If you want to view the EEO Law Supplement poster, please choose your language: English - Spanish - Chinese
If you want to view the Pay Transparency Policy Statement, please click the link: English

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