Case Study
How JoulesLabs Built helloDeutsch, A Modern German Learning Platform for Bangla Speakers
Bridging classroom learning and digital practice through secure, localized technology
helloDeutsch, launched in January 2025, was designed to give Bangla-speaking students an accessible and modern way to learn the German language. It serves as both an independent learning platform and an integrated digital extension of GLAB’s physical German language courses.
JoulesLabs partnered with GLAB to build a secure, exam-ready education platform that combines structured lessons, vocabulary tools, and digital assessments tailored for local learners.
Challenges & Solutions
Problem Statement
Bangla-speaking students learning German often faced three major obstacles:
- Lack of localized, Bangla-supported digital learning tools
- Poor integration between online learning and offline coursework
- Security challenges in managing online exams and user access
The objective was to create a digital platform that replicated classroom discipline while offering the flexibility and richness of self-paced learning.
Approach & Solution
JoulesLabs built helloDeutsch as a mobile-first solution focused on usability, content security, and strong localization.
Secure Learning Environment
Each student account is linked to a single device through OTP verification, ensuring data integrity and preventing account sharing.
Localized Experience
A built-in German–Bangla–English dictionary, grammar modules, and interactive sentence banks support real contextual learning.
Exam Integration for GLAB Students
Exclusive online exams allow GLAB course graduates to take timed, single-attempt tests with secure OTP-based authentication.
Comprehensive Admin Dashboard
Administrators and moderators can manage students, questions, and content directly from a central dashboard, maintaining control over learning material, exam scheduling, and grading.
Impact
helloDeutsch quickly became a trusted language-learning platform within GLAB’s ecosystem:
Impact
ReviewX quickly became a recognized name in the WordPress ecosystem:
- 600,000+ downloads and 10,000+ active users
- First plugin to introduce multi-criteria reviews for WordPress
- 90%+ customer satisfaction rate, based on user reviews and support feedback
- Featured across top WordPress publications and YouTube channels
The plugin’s long-term adoption and consistent updates showcase the durability of JoulesLabs’ SaaS engineering standards.
First localized German learning platform for Bangla speakers
Secure single-device login for accountability
Thousands of dictionary entries and grammar modules integrated
Adaptive vocabulary and article testing for improved retention
Real-time exam system supporting GLAB-certified students
The platform bridged the gap between institutional learning and modern self-study, setting a new standard for localized educational technology in Bangladesh.
Technology Stack
Laravel
Flutter
PostgreSQL
Google OAuth
AWS EC2
AWS S3
REST APIs
CI/CD Pipelines
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GitHub Actions
Laravel
Flutter
PostgreSQL
Google OAuth
AWS EC2
AWS S3
REST APIs
CI/CD Pipelines
GitHub Actions
Laravel
Flutter
PostgreSQL
Google OAuth
AWS EC2
AWS S3
REST APIs
CI/CD Pipelines
GitHub Actions
Laravel
Flutter
PostgreSQL
Google OAuth
AWS EC2
AWS S3
REST APIs
CI/CD Pipelines
GitHub Actions
Laravel
Flutter
PostgreSQL
Google OAuth
AWS EC2
AWS S3
REST APIs
CI/CD Pipelines
GitHub Actions
Laravel
Flutter
PostgreSQL
Google OAuth
AWS EC2
AWS S3
REST APIs
CI/CD Pipelines
GitHub Actions
Team Structure
Takeaways
helloDeutsch showed that digital learning can be made effective by combining cultural context with robust security. JoulesLabs demonstrated how a locally relevant product can uphold global standards while solving real educational challenges.
What’s Next
The next phase of helloDeutsch focuses on expanding course modules, enabling progress tracking for learners, and offering the platform to additional institutions across Bangladesh that teach foreign languages.
Let’s Build Something That Lasts
Your SaaS. Delivered Right.
From day one to deployment, we don’t just ship features. We build SaaS that holds up under pressure, scales with confidence, and communicates clearly. Every sprint, every time.