1

Trainee Junior Javascript Developer Jobs in Missouri

Interco is seeking a talented Junior Software Developer with a strong background in JavaScript and React.js to contribute to an innovative Enterprise Resource Planning (ERP) project. In this role ...

Interco is seeking a talented Junior Software Developer with a strong background in JavaScript and React.js to contribute to an innovative Enterprise Resource Planning (ERP) project. In this role ...

Provide technical leadership and mentoring to junior engineers Required Skills: * Minimum 8 years ... HTML/HTML5,J2EE,Java,JavaScript,MySQL,Apache Struts, HCL Commerce, Java Server Pages (JSP ...

The Leidos FS2 Aero team has an opening for a junior (entry level) software developer to work on ... The applicant must possess competence with Python and should have working knowledge JavaScript ...

Front End Developer

Cape Girardeau, MO · On-site

$100K - $116K/yr

... engineering judgment. * Optimize for Core Web Vitals, page performance, accessibility, and SEO ... Write clean, well-tested, maintainable TypeScript/JavaScript code and participate in peer code ...

next page

Showing results 1-20

Trainee Junior Javascript Developer information

What types of projects can a trainee junior JavaScript developer expect to work on during their first year?

As a Trainee Junior Javascript Developer, you will typically start by assisting with smaller tasks such as bug fixes, writing unit tests, or implementing basic features under the guidance of senior developers. Over time, you'll gain exposure to collaborative projects like developing user interfaces, integrating APIs, or maintaining front-end codebases using frameworks such as React or Vue.js. These projects help you build technical skills while learning best practices in code review, version control, and agile workflows. Regular mentorship and code feedback are common, fostering rapid professional growth in a supportive team environment.

What does a trainee junior JavaScript developer do?

A Trainee Junior Javascript Developer is an entry-level professional who assists in building and maintaining web applications using JavaScript. They typically work under the guidance of more experienced developers, learning to write clean code, debug simple issues, and use frameworks like React or Node.js. This role is designed to help individuals develop foundational programming skills and gain practical experience in real-world software development projects.

What is the difference between Trainee Junior Javascript Developer vs Junior Web Developer?

AspectTrainee Junior Javascript DeveloperJunior Web Developer
Required CredentialsBasic coding knowledge, often in training or bootcampSome experience or formal education in web development
Work EnvironmentInternship or entry-level training programFull-time role in a development team
Employer UsageTraining programs, startups, or companies hiring entry-levelEstablished companies, agencies, or startups

In summary, a Trainee Junior Javascript Developer is typically in training or an internship, focusing on learning JavaScript basics, while a Junior Web Developer has more experience and handles broader web development tasks. Both roles serve as entry points but differ in experience level and responsibilities.

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

To thrive as a Trainee Junior Javascript Developer, you need a solid understanding of JavaScript fundamentals, HTML, CSS, and a relevant degree or coding bootcamp experience. Familiarity with version control systems like Git, basic knowledge of frameworks such as React or Node.js, and exposure to development environments are typically required. Strong problem-solving skills, eagerness to learn, and effective communication set candidates apart in this role. These skills and qualities are crucial for adapting to fast-paced development teams and building a foundation for future growth in software engineering.
What cities in Missouri are hiring for Trainee Junior Javascript Developer jobs? Cities in Missouri with the most Trainee Junior Javascript Developer job openings:
Infographic showing various Trainee Junior Javascript Developer job openings in Missouri as of July 2026, with employment types broken down into 85% Full Time, 3% Part Time, 1% Temporary, and 11% Contract. Highlights an 82% Physical, 3% Hybrid, and 15% Remote job distribution.

Junior Software Developer

Interco

Saint Louis, MO

$60K - $65K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 13 days ago


Job description

Company Description

Interco is a global metals trading and recycling company headquartered in St. Louis with facilities in Missouri and Illinois. The company buys, sells, and processes nonferrous metals and electronics scrap worldwide utilizing established partnerships with end consumers in the United States, Europe, Latin America, and Asia.

Job Description

Interco is seeking a talented Junior Software Developer with a strong background in JavaScript and React.js to contribute to an innovative Enterprise Resource Planning (ERP) project. In this role, the successful candidate will take the lead in crafting and executing sophisticated user interfaces for the company’s ERP software, aiming to deliver an unparalleled user experience. The Software Developer will collaborate with development team members and management to ensure projects align with the needs of the company. This role involves turning project requirements into functional, visually captivating interfaces that solve problems, optimize workflows, and provide valuable data that offers real-time business insight. Join Interco to be at the forefront of developing solutions that redefine efficiency and impact in ERP systems. 

Responsibilities Include 

  • Develop responsive and user-friendly front-end interfaces for our ERP software using JavaScript, HTML, CSS, and React.js. 
  • Collaborate with development team to design, consume, and integrate RESTful APIs that retrieve and update data from PostgreSQL backends. 
  • Work closely with UI/UX designs to translate wireframes and mockups into functional user interfaces, ensuring consistency with design guidelines and best practices. 
  • Participate in defining API contracts, perform contract and integration debugging, and collaborate on end-to-end testing. Collaborate on CI/CD pipelines and use containerized development environments. 
  • Write and maintain technical documentation. 
  • Implement and maintain reusable components and libraries to streamline development and ensure consistency across ERP software. 
Qualifications
  • Bachelor’s degree in Computer Science, Software Engineering, or a related field. 
  • Proven experience as a Software Developer, building complex web applications or ERP systems with a portfolio representative of a strong technical acumen. 
  • Proficiency in front-end technologies such as HTML5, CSS3, JavaScript, and various front-end frameworks (e.g., React, Angular, Vue.js) with a solid understanding of responsive design principles. 
  • Practical experience consuming and integrating RESTful APIs; experience building RESTful APIs with FastAPI is a plus. 
  • Solid working knowledge of PostgreSQL (writing queries, schema design, indexing, migrations) 
  • Experience with version control systems and collaboration tools such as Git and Figma. 
  • Strong problem-solving skills and attention to detail to identify and resolve issues effectively. 
  • Excellent communication and teamwork skills to collaborate with cross-functional teams effectively. 

Additional Information
  • $60,000-$65,000 
  • Salary plus annual performance review and bonus 
  • 401(k) with generous company match after one year 
  • Paid vacation Christmas Eve through – New Year’s Day for all employees 
  • Accelerated paid Vacation time 
  • Company paid $25K life insurance policy 
  • 100% Company-paid Short-Term Disability, Long-Term Disability 
  • 100% Company-paid Medical, Dental, Vision 

As a matter of company policy, the Company does not sponsor employment visas or hire from out of the USA nor does the company sponsor candidates who do not currently reside within the USA without an existing H-1B visa. 

This job description is designed to provide a general overview of the requirements of the job and does not entail a comprehensive listing of all activities, duties or responsibilities that will be required. Interco reserves the right to modify this job description at any time, including assigning or reassigning job duties or eliminating this position at any time.  

Candidate information will be kept confidential according to EEO guidelines.  

Work remotely: No  

www.intercojobs.com  

Company Information  

Interco has been recycling computers, batteries, metals, and electronics with a focused track record of innovation and integrity since 1996. The company specializes in the placement of smelter-ready materials catering to commercial, industrial, dealer, and government organizations nationwide.   

The Interco recycling facilities are separated into three departments: nonferrous metals, computers and electronics, and battery processing. The nonferrous facility is located on the 40-acre main campus in Madison (IL) while the computers and electronics are processed in Edwardsville where the Administrative and some logistics offices are located. The commercial department is located on The Hill in St. Louis.  

www.intercojobs.com