SDLC JavaScript Developer

COOLSOFT; Madison (WI); On-site; USD 83,000 - 138,000; Full time

Job summary

COOLSOFT in Madison, WI seeks an SDLC JavaScript Developer to join a contract-based, 10-month engagement. The role focuses on developing and supporting Java and JavaScript web applications within an agile team, using Spring Boot and front-end frameworks like React.

Responsibilities include implementing code, conducting unit tests, and collaborating with QA and business stakeholders to refine requirements. Candidates should have mid-level Java and JavaScript experience, SQL, Git, and a track

Qualifications

• Mid level Java experience.
• Mid level JavaScript experience.
• Experience creating web applications.
• Experience with a front-end JavaScript framework like React.
• Experience implementing unit tests.
• Experience documenting or refining systems or requirements.
• SQL experience.

Responsibilities

• Provide development support for new or existing software products, including legacy applications, COTS solutions, and new custom development.
• Follow SDLC guidelines and actively engage with Agile team members.
• Responsible for developing application code as assigned.
• Incorporate security and quality assurance to all software development activity.

Skills

SDLC

JAVA SCRIPT

SQL Database

Java

JavaScript

React

Spring Boot

Git

Tools

Git

Job description

SDLC JavaScript Developer

(Jobs in Madison, WI)

Requirement id 158921

Job title Developer

Job location in Madison, WI

Skills required SDLC, JAVA SCRIPT, SQL Database,

Open Date 18-Aug-2026

Close Date

Job type Contract

Duration 10 Months

Compensation DOE

Status requirement ---

Job interview type ---

Email Recruiter:coolsoft

Job Description Developer: SDLC, JAVA SCRIPT, SQL Database,

Start date :9/7/2026

End Date :06/30/2027

Submission deadline :8/20/2026 at 4:00 PM CST.

Client Info : ETF

Note:

• Interview Process: via MS Teams
• Onsite or Remote? Must be a current WI resident. No relocation is allowed.

Description:

The Application Developer role is directly involved with the development and support of Java and JavaScript web applications. Within an existing application, the role will evaluate how to best meet requirements and implement enhancements as well as provide maintenance and support. For new applications, the role serves as a team member under application architect direction in developing java and web applications in an agile environment.

This role will spend much of their time producing code as part of an agile team. The role will be part of implementing modern frameworks and technologies and should have experience with Spring Boot and front-end JavaScript frameworks like ReactJS.

Experience with financial systems, including invoicing, billing or payment systems, is highly preferred.

Example activities may include:

• Participating as a developer and code reviewer on project teams.
• Developing prototypes and proof-of-concept applications to determine the best technical approach.
• Implementing new tools and approaches within the SDLC.
• Participating in Agile scrum ceremonies
• Working with business representatives to define and refine requirements
• Working with quality assurance team members to create and deliver testable software

Responsibilities:

• Provide development support for new or existing software products, including legacy applications, COTS solutions, and new custom development.
• Incorporate security and quality assurance to all software development activity.
• Responsible for developing application code as assigned.
• Follow SDLC guidelines and actively engage with Agile team members

Skills and Abilities:

• Mid level Java experience
• Mid level JavaScript experience
• Experience creating web applications
• Experience with a front-end JavaScript framework like React
• Experience implementing unit tests
• Experience documenting or refining systems or requirements
• SQL experience
• Git experience

EOE Protected Veterans/Disability