Full Stack Developer (MERN)

We are recruiting to fill the position below:

Job Title: Full Stack Developer (MERN)

Location: Magodo Phase 1, Lagos
Job Type: Full-Time / Hybrid

Position Summary

• You will be responsible for building and maintaining both frontend and backend components of our B2C CRM platform, working with the IDURAR codebase to extend its capabilities for consumer-focused use cases.
• We are looking for an experienced Full Stack Developer to join the MarketEdge CRM development team.
• The ideal candidate has deep expertise in the MERN stack and experience building scalable, multi-tenant SaaS applications.

Key Responsibilities
Backend Development:

• Build and optimize MongoDB aggregation pipelines for analytics and reporting
• Develop integration middleware for external systems: Edge Card Loyalty API, WhatsApp Business, SMS gateways
• Extend IDURAR’s existing data models to support consumer profiles, transactions, and behavioral tracking
• Build real-time features using Redis for caching and session management
• Implement multi-tenant architecture ensuring complete data isolation between client organizations
• Design and implement background job processing using Bull queue for campaign sending and data synchronization
• Design and implement RESTful APIs using Node.js and Express.js for B2C CRM modules

Frontend Development:

• Implement state management using Redux Toolkit for complex application state
• Develop the Customer 360 profile view with tabbed navigation and real-time data updates
• Implement the segment builder with visual query construction and live preview
• Create dynamic dashboards with data visualization using Recharts or similar libraries
• Build responsive React components using Ant Design framework following established design system
• Build the campaign creation wizard with multi-step forms, content preview, and audience targeting

Database Design and Management:

• Implement data migration scripts for schema evolution
• Create indexes for optimized query performance across high-volume collections
• Ensure referential integrity between CRM entities and external loyalty platform data
• Design and implement MongoDB schemas for: customers, transactions, segments, campaigns, journeys

API Integration:

• Develop webhook handlers for real-time event processing from external systems
• Integrate with Wema Bank Edge Card API for loyalty points, tiers, and redemption data
• Create secure API authentication using JWT and OAuth 2.0 patterns
• Build SMS gateway integrations with Africa’s Talking and Twilio
• Implement WhatsApp Business API integration for campaign messaging

Code Quality and DevOps:

• Participate in code reviews providing constructive feedback
• Contribute to CI/CD pipeline maintenance and deployment automation
• Write clean, maintainable code following established coding standards and IDURAR conventions
• Document APIs using OpenAPI/Swagger specifications.
• Develop unit tests achieving minimum 80% code coverage

Required Skills and Qualifications
Technical Skills (Required):

• Strong understanding of authentication/authorization: JWT, OAuth 2.0, RBAC
• Advanced MongoDB skills: schema design, aggregation framework, indexing strategies
• 4+ years of professional experience with MERN stack development
• Experience with Redis for caching, sessions, and real-time features
• Proficiency in RESTful API design and implementation
• Expert-level proficiency in Node.js and Express.js
• Git version control and collaborative development workflows
• Experience with testing frameworks: Jest, React Testing Library, Supertest
• Strong React.js skills including hooks, context, and performance optimization

Technical Skills (Preferred):

• Experience with Ant Design component library
• Familiarity with Bull or similar job queue systems
• Experience with cloud platforms: AWS, DigitalOcean, or similar
• Knowledge of Docker containerization
• Experience with IDURAR or similar open-source ERP/CRM platforms
• Understanding of message broker patterns and event-driven architecture

Domain Knowledge:

• Understanding of CRM workflows: lead management, customer lifecycle, campaign execution
• Knowledge of Nigerian business environment and regulatory requirements (NDPR) is a plus
• Familiarity with loyalty program mechanics and point-based systems
• Experience with multi-tenant SaaS architecture

Soft Skills:

• Excellent communication skills for technical discussions and documentation
• Self-motivated with ability to work independently in hybrid/remote environment
• Collaborative mindset and openness to feedback
• Commitment to continuous learning and staying current with technology trends
• Strong problem-solving and analytical abilities

Key Deliverables:

• Campaign Management Module: Multi-channel campaign builder with scheduling and tracking
• Customer Management Module: Consumer profiles, 360-degree views, household linking
• Analytics Dashboard: Real-time metrics, CLV calculations, cohort analysis.
• Integration Layer: Edge Card API connector, messaging gateway integrations
• Segmentation Engine: Visual segment builder with RFM analysis integration