Junior JavaScript Developer
On-sitePosted July 23, 2026
About the role
Sigma Software is seeking a Junior JavaScript Developer to join an AdTech project focused on behavioral analytics and marketing automation. You will contribute to frontend development, API integrations, and troubleshooting within customer-facing environments.
Responsibilities
Qualifications:
- 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 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 production issues and perform root cause analysis
- Collaborate with account managers, QA engineers, and implementation specialists
- Participate in technical consultations and onboarding alignment meetings
- 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 f
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