Full Stack Developer (MERN) at Tezza Business Solutions Limited

Tezza Business Solutions Limited is a leading Software Quality Assurance and Testing multinational with a regional office in Lagos, Nigeria. We are a Software Quality Assurance and Testing Services provider. Our primary goal is to be the "go to" Quality Assurance & Software Testing company in East and West Africa while developing offshore resources to fill test automation positions (and other hard to find software testing capabilities) in the North America and European markets.

We are recruiting to fill the position below:

Job Title: Full Stack Developer (MERN)

Location: Magodo Phase 1, Lagos
Employment Type: Full-time

Position Summary

• We are looking for an experienced Full Stack Developer to join the MarketEdge CRM development team.
• 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.
• The ideal candidate has deep expertise in the MERN stack and experience building scalable, multi-tenant SaaS applications.

Key Responsibilities
Backend Development:

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

Frontend Development:

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

Database Design and Management:

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

API Integration:

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

Code Quality and DevOps:

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

Required Skills and Qualifications
Technical Skills (Required):

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

Technical Skills (Preferred):

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

Domain Knowledge:

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

Soft Skills:

• Strong problem-solving and analytical abilities
• 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

Key Deliverables:

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

Application Closing Date
Not Specified.