Senior API Developer

We are seeking a highly skilled and visionary Senior API Developer to architect and implement the next generation of our retail technology platform. In this pivotal role, you will leverage your deep expertise in **WSO2, event-driven architecture, and microservices** to redesign our core APIs and integration layers. You will be instrumental in building a scalable, secure, and high-performance system that integrates critical domains like Point-of-Sale (POS) and Customer & Marketing (CAM). This is a hands-on technical leadership role that requires a strategic mindset and the ability to coordinate with our offshore development team to deliver robust, enterprise-grade solutions.

Key Responsibilities

API & Event-Driven Architecture:

*  Lead the redesign and development of existing APIs using the WSO2 platform.

*  Design and implement event-based workflows and asynchronous data handling patterns to ensure system resilience and responsiveness.

*  Architect and integrate core services for the POS and CAM domains.

Integration & Data Layer:

*  Design and manage integrations with Azure SQL for POS data and other enterprise systems.

*  Implement and manage CIAM (Customer Identity and Access Management) and Identity Provider (IDP) solutions for robust security.

*  Optimize the handling of large-scale data transactions using Azure Blob storage and Apache Parquet formats.

*  Spearhead data orchestration, lifecycle management, caching strategies (e.g., memcached), and data offloading processes.

Backend for Frontend (BFF) & Microservices:

*  Develop a scalable GraphQL-based BFF layer to decouple front-end applications from backend microservices, enhancing performance and developer agility.

*  Ensure all services adhere to stateless, scalable microservice architecture principles and best practices.

*  Provide technical guidance and coordinate implementation tasks with the offshore development team in Sri Lanka.

Security & Data Governance:

*  Enforce a strong, data-centric security model across all services and data touchpoints.

*  Champion a "data-as-entities" approach, ensuring strict data governance, orchestration, and lifecycle handling protocols are implemented and maintained.

Required Qualifications

*  Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent practical experience.

*  5+ years of professional experience in software development with a focus on API and integration architecture.

*  Proven, hands-on experience with the **WSO2 platform** (API Manager, Enterprise Integrator, Identity Server).

*  Demonstrable experience designing and building **event-driven architectures** and **microservices**.

*  Strong proficiency in **GraphQL** for building BFF layers and/or APIs.

*  Solid experience with **Microsoft Azure** services, particularly Azure SQL, Azure Blob Storage, and related data services.

*  Experience implementing authentication and authorization systems (CIAM/IDP).

*  Experience with large-scale data formats and optimization (e.g., Apache Parquet).

Preferred Qualifications

*  Experience in the retail or e-commerce sector, particularly with POS systems.

*  Certifications in WSO2, Azure Solutions Architect, or similar.

*  Proven experience leading or coordinating with geographically distributed/offshore teams.

*  Knowledge of containerization and orchestration technologies (Docker, Kubernetes).

*  Familiarity with retail data models and domains.

Skills Required

Technical Skills:

WSO2, GraphQL, Microservices, Event-Driven Architecture, REST APIs, Azure Cloud, SQL, CIAM/IDP, Data Orchestration, Caching Strategies.

Professional Skills:

*  Excellent problem-solving and analytical abilities.

*  Strong communication and collaboration skills for effective cross-team and cross-border coordination.

*  Strategic thinking with a focus on building scalable and maintainable systems.

*  Leadership and mentorship capabilities.

Experience Level

Senior Level (5+ years of relevant experience)