Junior JavaScript Developer

Stack

Responsibilities

• ▹Configure and maintain website integrations, including event tracking, SPA fixes, cart tracking and catalog integrations
• ▹Implement and support Email Service Provider integrations and synchronization workflows
• ▹Execute migration and replatforming activities with thorough validation and testing
• ▹Develop custom onsite JavaScript solutions for campaigns and interactive user flows
• ▹Build and support Airflow DAGs for recurring data processing workflows
• ▹Configure dynamic email content and SKU-level recommendation tracking
• ▹Analyze customer requests and assess technical feasibility of solutions
• ▹Develop integrations with third-party marketing and email platforms
• ▹Investigate and resolve production issues and perform root-cause analysis
• ▹Collaborate with account managers, QA engineers and implementation specialists
• ▹Participate in technical consultations and onboarding alignment meetings

Requirements

• ▹2+ years of commercial experience with Vanilla JavaScript (ECMAScript 5+)
• ▹Strong knowledge of HTML and CSS
• ▹Hands-on experience with REST API integrations
• ▹Practical experience with jQuery
• ▹Experience with Chrome DevTools and browser debugging
• ▹Understanding of behavioral event tracking implementation
• ▹Knowledge of Email Service Provider integration workflows
• ▹Ability to develop custom JavaScript logic for onsite experiences
• ▹Strong analytical and problem-solving skills
• ▹Good communication skills with technical and non-technical stakeholders
• ▹Attention to detail and commitment to code quality
• ▹Experience working in cross-functional teams
• ▹Intermediate+ English level
• ▹Readiness to learn new tools and domain-specific technologies

Nice to have

• ▹Experience with PHP
• ▹Familiarity with Apache Airflow
• ▹Experience using Postman
• ▹Understanding of Git workflows
• ▹Experience with AdTech or marketing technology platforms
• ▹Exposure to customer-facing onboarding or integration projects

Soft skills

About the company

Sigma Software is hiring for a fast-growing AdTech partner project: the platform identifies and engages anonymous website visitors through behavioral intelligence and marketing automation, turning browsing behavior into actionable insights for personalized campaigns across email, SMS and paid advertising. The team offers a supportive engineering culture, opportunities for professional growth, and work with modern AdTech and marketing-automation technologies.