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Mid Frontend Developer Jobs in St Louis, MO (NOW HIRING)

Collabera

PM/BA (App Developer)

Saint Louis, MO · On-site

... mid-size companies to meet their talent needs with high quality IT resources through Staff ... This app is front end and faces non tech users. Client is looking for someone that has front end ...

Collabera

Java Developer

O Fallon, MO · On-site

$47.75 - $61.75/hr

... 2000 and leading mid-market clients to deliver successfully in an increasingly competitive ... Highly experienced with front-end web development using advanced JavaScript Expertise with ...

MasterCard

Senior Software Engineer - Java

O Fallon, MO · On-site

$115 - $184/hr

Mentor junior and mid-level engineers, share technical knowledge, and contribute to a culture of ... Frontend: React, Angular, TypeScript, JavaScript, HTML5 / CSS3 * Data & Integration: SQL ...

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All JobsMid Frontend Developer JobsMid Frontend Developer Jobs in St. Louis, MO

Mid Frontend Developer information

See St Louis, MO salary details

$41.3K

$107.3K

$151.2K

How much do mid frontend developer jobs pay per year?

As of Sep 7, 2026, the average yearly pay for mid frontend developer in St. Louis, MO is $107,346.00, according to ZipRecruiter salary data. Most workers in this role earn between $101,100.00 and $117,600.00 per year, depending on experience, location, and employer.

What is a mid frontend developer?

Mid Frontend Developers are professionals who specialize in building and maintaining the user-facing parts of web applications, typically with 2-4 years of experience. They are responsible for translating design mockups into interactive websites or apps using technologies like HTML, CSS, and JavaScript frameworks such as React, Angular, or Vue.js. Their role often involves collaborating with designers and backend developers, optimizing applications for speed and responsiveness, and ensuring cross-browser compatibility. Unlike junior developers, mid-level developers are expected to work more independently, solve moderately complex problems, and contribute to code reviews and project planning.

What are the key skills and qualifications needed to thrive as a mid frontend developer?

To thrive as a Mid Frontend Developer, you need strong proficiency in HTML, CSS, and JavaScript, along with experience in modern frameworks like React, Angular, or Vue and a relevant degree or equivalent experience. Familiarity with version control systems (such as Git), build tools, and UI design libraries is commonly expected. Strong problem-solving, effective communication, and a collaborative mindset help you stand out in team settings. These skills ensure you can create high-quality, user-friendly interfaces that work well in dynamic, cross-functional development environments.

What are some common challenges faced by mid frontend developers when working on cross-functional teams?

Mid-level frontend developers often collaborate with backend developers, designers, and product managers, which can sometimes lead to challenges in communication and aligning on project requirements. Balancing the need for delivering visually appealing, responsive interfaces while ensuring performance and accessibility can also be demanding. Additionally, adapting to evolving frameworks or integrating new tools as decided by the team may require continuous learning and flexibility. Successful mid-level frontend developers proactively seek feedback, clarify requirements early, and stay updated on best practices to navigate these challenges.

What is the difference between Mid Frontend Developer vs Junior Frontend Developer?

AspectMid Frontend DeveloperJunior Frontend Developer
Experience2-4 years0-1 year
SkillsProficient in HTML, CSS, JavaScript, frameworks like React or Angular, and basic version controlBasic knowledge of HTML, CSS, JavaScript, and some frameworks
ResponsibilitiesDeveloping features, optimizing performance, collaborating with designers and backend teamsAssisting in coding, fixing bugs, learning project workflows
Work EnvironmentIndependent task handling, code reviews, team collaboration

The Mid Frontend Developer typically has more experience and handles complex tasks independently, while the Junior Frontend Developer focuses on learning, assisting, and gaining foundational skills. The mid-level role requires a deeper understanding of frameworks and project workflows, making it suitable for those with some professional experience in frontend development.

What are popular job titles related to Mid Frontend Developer jobs in St. Louis, MO?

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

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

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

What cities near St. Louis, MO are hiring for Mid Frontend Developer jobs?

Cities near St. Louis, MO with the most Mid Frontend Developer job openings:

Mid Frontend Developer jobs near you
Infographic showing various Mid Frontend Developer job openings in St. Louis, MO as of August 2026, with employment types broken down into 69% Full Time, 22% Part Time, 1% Temporary, 7% Contract, and 1% Nights. Highlights an 91% Physical, 3% Hybrid, and 6% Remote job distribution, with an average salary of $107,346 per year, or $51.6 per hour.

Fullstack Engineer (Java + Angular) - Only W2

Saransh Inc

O Fallon, MO • On-site

$49 - $63.50/hr

Contractor

Re-posted 26 days ago

Key responsibilities

  • Design, develop, and own Java-based backend services and REST APIs in a distributed architecture

  • Build and enhance UI applications using Angular and Node.js

  • Own end-to-end delivery including design, development, testing, deployment, configuration, and documentation

Job description

Role: Fullstack Engineer (Java + Angular)
Location: O'Fallon, MO (Hybrid - 2 days a week onsite)
Job Type: W2 Contract
 
NOTE: Only W2 required - No C2C (or) Third-party candidates
 
Experience level: Mid-level / Senior
 
 
Mid Level:
 
Description:
  • You will contribute to building scalable backend services using Java/Spring and modern user interfaces using Angular and Node.js within a distributed architecture. Working closely with cross-functional teams, you will help deliver production-grade solutions and continuously improve your skills across cloud platforms, DevOps practices, and observability.
  • You will also leverage AI-assisted development tools to enhance productivity and support different phases of the SDLC.
In this role, you will:
  • Design, develop, and own Java-based backend services and REST APIs in a distributed architecture
  • Build and enhance UI applications using Angular and Node.js
  • Own end-to-end delivery: design, development, testing, deployment, configuration, and documentation
  • Ensure high-quality code through reviews, testing (unit/integration), and automation
Core Requirements:
  • Strong hands-on experience in Java, Spring Boot, and REST APIs
  • Hands-on experience with Angular (2+) and Node.js
  • Experience building and maintaining scalable, production-grade applications
 
Core Engineering Skills:
  • Strong problem-solving and debugging skills in distributed systems
  • Solid understanding of software design principles and best practices
  • Experience in test-driven development (unit, integration testing) 
 
Work experience of 3-5 years
  • Experience with cloud platforms (PCF, Kubernetes, AWS, or Azure)
  • Exposure to CI/CD pipelines and DevOps practices
  • Experience with observability tools (e.g., Splunk, logging, monitoring)
  • Exposure to AI tools for assisted development during SDLC phases
 
Senior Level:
As a senior engineer, you will – 
·      Design, develop, and maintain robust and scalable backend services using Java, Spring Boot, and microservices architecture.
·      Deploy and manage applications on PCF or Kubernetes
·      Develop engaging and responsive user interfaces using modern front-end frameworks such as Angular or React.
·      Participate in PoCs (Proof of Concept) and help the department with selection of vendor solutions, technologies, methodologies and frameworks. 
·      Write clean, well-documented, and testable code.
·      Collaborate with product managers, designers, and other engineers to deliver high-quality products.
·      Participate in code reviews and contribute to improving our development processes.
·      Troubleshoot and resolve complex technical issues.
·      Ensure adequate test coverage in Unit Testing, System Testing/Integration Testing and Performance Testing. 
·      Mentor junior engineers and share your expertise. 
·      Work in an agile environment, participating in sprint planning, daily stand-ups, and retrospectives
 
All About You:
·      Overall 9 years of career experience into Full Stack Development
·      Strong proficiency in Java and Spring boot framework
·      Experience designing and developing microservices
·      Experience with PCF, K8s, Docker, or other cloud platforms
·      Solid understanding of front-end development principles and experience with Angular/React frameworks
·      Proficiency in HTML, CSS, JavaScript, and JQuery
·      Experience with relational databases such as Oracle or PostGreSQL. Well versed with writing efficient and optimised queries
·      Experience with Restful API design and development
·      Experience leveraging or developing solutions using Information Security-related concepts: Cryptography – X.509, public key cryptography standards, JWT, hashing, digital signatures
·      Experience with testing frameworks and methodologies
 
Good to have:
·      Experience with other cloud platforms (e.g., Azure, AWS, GCP)
·      Experience with DevOps practices and tools (e.g., Jenkins, Docker, Kubernetes)
·      Contributions to open source projects