ZipRecruiter

Log In

1

Javascript Backend Developer Jobs in St Louis, MO

Leidos

Data Engineer Software Developer

Shiloh, IL · On-site

$106K - $128K/yr

Seeking a Back-End Developer to join the Real-Time Visibility (RTV) team, focused on designing ... React, JavaScript, and HTML. * Develops and manages data warehouses and data lakes to support ...

Leidos

Data Engineer Software Developer

Shiloh, IL · On-site

$106K - $128K/yr

Seeking a Back-End Developer to join the Real-Time Visibility (RTV) team, focused on designing ... React, JavaScript, and HTML. * Develops and manages data warehouses and data lakes to support ...

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 ...

previous pagenext page

Showing results 21-40

All JobsJavascript Backend Developer JobsJavascript Backend Developer Jobs in St. Louis, MO

Javascript Backend Developer information

See St Louis, MO salary details

$11

$56

$82

How much do javascript backend developer jobs pay per hour?

As of Sep 11, 2026, the average hourly pay for javascript backend developer in St. 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 St. Louis, MO?

For Javascript Backend Developer jobs in St. Louis, MO, the most frequently searched job titles are:

What job categories do people searching Javascript Backend Developer jobs in St. Louis, MO look for?

The top searched job categories for Javascript Backend Developer jobs in St. Louis, MO are:

What cities near St. Louis, MO are hiring for Javascript Backend Developer jobs?

Cities near St. 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 St. Louis, MO as of June 2026, with employment types broken down into 92% Full Time, 5% Part Time, and 3% Contract. Highlights an 78% Physical, 5% Hybrid, and 17% Remote job distribution, with an average salary of $116,751 per year, or $56.1 per hour.

Data Engineer Software Developer

Shiloh, IL • On-site

Leidos
IT Services • 10K+ employees
Learn more about Leidosexternal

$106K - $128K/yr

Full-time

Re-posted 7 days ago

Leidos rating

8.3

Company rating: 8.3 out of 10

Based on 153 frontline employees who took The Breakroom Quiz

Job description

The Leidos Digital Modernization Group seeks a Data Engineer Software Developer for the Global Solution Management - Operations II (GSM-O II) contract, under the Global Automations & Intelligent Network Solutions (GAINS) Team. Seeking a Back-End Developer to join the Real-Time Visibility (RTV) team, focused on designing, building, and maintaining the infrastructure and systems that collect, store, process, and analyze large volumes of network operations data for the DISN network. This role is critical for ensuring that data from disparate sources-such as logs, performance metrics, events, ticketing, ordering, and CMDB systems-is readily available, reliable, and performant for business and mission use. The existing platform is built on Elastic stack and Confluent Kafka platforms. The ideal candidate will have a strong background in data engineering, platform operations, and integration, with experience in large-scale, mission-critical environments.
As a key Real-Time Visibility team member, you will be conducting design and implementation for a variety of solution capabilities to integrating various data sources into Confluent (Kafka) and Elastic platforms, design of robust data integration solutions, and adhering to the program's CI/CD processes and data governance practices. You will an integral member of a fast paced, Agile development and implementation team to architect, design and develop data integration solutions (Extract, Transform, Load) to support a unified User Experience / User Interface (UX/UI) that provides a holistic single-pane-of-glass interface for an integrated solution on the Elastic platform. You will also work with operational end users and support teams to perform requirements analysis, as well as design, develop and demonstrate mockups and wireframes.
Candidate must be within driving distance of Scott AFB. At a minimum, a Secret clearance is required upon the start of employment and within 14 days following the start date the employee must obtain their Security + certification.
Primary Responsibilities:
  • Designs, builds, and maintains scalable, reliable data systems and pipelines to ingest, process, and transform large, complex, and disparate data sources for analytics and reporting.
  • Unifies and integrates data from multiple network operations systems into a consistent, accessible platform, ensuring data quality, accuracy, security, and compliance with DoD and DISA requirements.
  • Implements solutions using Confluent Kafka, Elastic Stack, AWS, and Red Hat OpenShift (Kubernetes), including creating Kafka, Elastic, and Logstash pipelines and supporting Kibana visualizations and dashboards with React, JavaScript, and HTML.
  • Develops and manages data warehouses and data lakes to support analytics, reporting, and operational dashboards, optimizing infrastructure for performance, scalability, and cost-effectiveness through automation and best practices.
  • Continually analyze and optimize ingestion throughput, query performance, indexing strategies, and storage efficiency across Elastic and Kafka platforms.
  • Automates data-related tasks such as ETL/ELT processes, data validation, cleansing, monitoring, and supports CI/CD pipelines for automated build, test, and deployment.
  • Collaborates with data analysts, visualization engineers, and other stakeholders to deliver integrated, actionable data solutions, and documents data architecture, integration patterns, and operational procedures.
  • Troubleshoots and resolves issues related to data ingestion, processing, and platform performance, storage, memory, partitioning, and cluster performance.

Basic Qualifications:
  • Bachelor's degree in Computer Science, Engineering, or related technical discipline and 4+ years of relevant experience.
  • Hands-on experience designing, building, and maintaining data pipelines (ETL/ELT) and integrating multiple, disparate data sources.
  • Experience with data warehouse and/or data lake technologies (e.g., AWS Redshift, S3, Hadoop, Snowflake, or similar).
  • Proficiency with data engineering tools and languages such as Python, Java, SQL, and shell scripting.
  • Experience with Elastic Stack (Elasticsearch, Logstash, Kibana) and/or Kafka for data ingestion and processing.
  • Familiarity with network operations data (logs, metrics, events, ticketing, CMDB) and related data models.
  • Experience with Linux/UNIX system administration and automation.
  • Knowledge of data security, access controls, and compliance frameworks (DoD, DISA, RMF, STIGs).
  • Experience with CI/CD pipelines, containerized pipelines, version control (Git, Bitbucket), and DevOps practices.
  • Strong communication and documentation skills for collaboration and knowledge sharing.
  • Must be able to commute to Scott AFB, IL for up to full-time onsite support.
  • Ability to obtain interim Secret DoD Security clearance before the start date.
  • Ability to obtain Security+ certification or equivalent DoD 8570 IAT II certification within 14 days of the start date.

Preferred Qualifications:
  • Experience with DISA, DISN, or other DoD network environments, including developing and deploying software applications that meet DoD security standards (e.g., STIGs), and knowledge of network security, encryption, and access controls in classified environments.
  • Experience with big data technologies and platforms such as Kafka, Spark, NiFi, Hadoop, Elasticsearch, Logstash, Databricks, and ELK Stack for text mining, summarization, search, and entity extraction.
  • Experience with cloud-based data platforms (AWS, Azure, GCP, AWS GovCloud), cloud-integrated platforms, and infrastructure as code, including networking and security policies.
  • Familiarity with Kubernetes deployment, platform upgrades, patching, configuration management tools (Ansible, Puppet, Chef), and monitoring, alerting, and observability tools (Prometheus, Grafana, Elastic).
  • Experience with BI tools like Kibana and developing and maintaining technical documentation and runbooks.
  • Strong understanding and practical experience with Agile methodologies (Scrum, SAFe), and related tools such as Atlassian JIRA and Confluence.
  • Certified Confluent Developer and Certified Elastic Engineer.
  • Excellent communication and collaboration skills, with experience working remotely with geographically dispersed teams and within a matrixed organization to combine software, integration, and data engineering practices.
  • Apply knowledge of system architecture, networks, and centralized logging (ELK) to support data transformation initiatives.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.
Original Posting:
August 18, 2026
For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
Pay Range:
Pay Range $87,100.00 - $157,450.00
The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

What Leidos employees say

Pay

Benefits

Hours and flexibility

Workplace

Get the full story on Breakroom

Leidos logo

About Leidos

Sourced by ZipRecruiter

At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers' success. We empower our teams, contribute to our communities, and operate sustainable practices. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community.

Industry

It services

Company size

10,000+ Employees

Headquarters location

Reston, VA, US

Social media

FacebookTwitter

View All Leidos Jobs

Apply