Junior JavaScript Developer

SigmaSoftware2

Brasília, DF, Brazil Remote permanent

Posted: February 17, 2026

Required Skills

Job Description

Are you passionate about building clean, efficient, and reusable code? We at Sigma Software are looking for a Junior JavaScript Developer to join our distributed team. This is a remote position with a focus on delivering high-quality CRM modules and components for a large-scale e-commerce platform.

Sigma Software is a global IT service provider delivering top-notch software development, consulting, and IT solutions for clients worldwide. We partner with innovative companies across various industries, helping them create cutting-edge products and services that reach millions of users.

• Develop, maintain, and optimize CRM drag-and-drop module libraries and evergreen components
• Maintain documentation for marketing assets and components
• Write, extend, and debug code within team tools and services
• Ensure components align with brand guidelines and best practices
• Collaborate with CRM Engineering Team to standardize tags, metadata, and personalization strategies
• Train and support CRM marketers on platform capabilities and best practices
• Manage multiple projects and prioritize tasks effectively
• Troubleshoot and resolve issues with marketing solutions
• Participate in on-call rotation for the team
• Execute special projects as assigned

• 1.5–2 years of commercial experience in JavaScript frontend development
• Strong knowledge of core JavaScript (ES6+) fundamentals
• Proficiency in HTML5 & CSS3
• SQL knowledge
• Basics of debugging and performance optimization
• Readiness to learn and work with Braze (customer engagement platform)
• Understanding of version control systems (Git)
• Basic testing principles
• Upper-Intermediate or higher English (written & spoken)
• Strong communication skills — ability to explain solutions and ask clarifying questions

WILL BE A PLUS

• Experience integrating with third-party tools or marketing/engagement platforms
• Familiarity with analytics, tracking scripts, or customer engagement tools

PERSONAL PROFILE

• Proactive junior developer with strong problem-solving skills
• Attention to detail and quality
• Ability to work collaboratively across technical and marketing teams
• Comfortable with multitasking and adapting to evolving priorities

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