Enterprise Service Layer (ESL) Developer

Datamatics Technologies LLC; Islamabad; On-site; PKR 24,910,000 - 35,981,000; Full time

Job summary

Datamatics Technologies LLC is seeking an experienced Enterprise Service Layer (ESL) Developer to design, develop, and maintain APIs and integration services connecting digital applications with enterprise backend systems. The candidate should have strong hands‑on experience in REST APIs, microservices, backend development, and enterprise system integration.

Onsite/Offshore/Hybrid as applicable. The role requires 5+ years of software development experience and expertise in Java/Spring Boot,

Qualifications

• 5+ years of software development experience.
• 3+ years in API development, microservices, middleware, or enterprise integration.
• Experience integrating applications with enterprise/backend systems.

Responsibilities

• Design, develop, test, and maintain ESL services and APIs.
• Develop REST APIs and microservices to integrate applications with backend systems.
• Build and maintain integrations between digital applications and enterprise systems.
• Develop integration services using API and messaging approaches.
• Handle API validation, transformation, error handling, and logging.
• Troubleshoot API, integration, and production issues.
• Write clean, reusable, maintainable, and testable code.
• Participate in code reviews and follow API standards.
• Collaborate with Architects, Commerce Developers, Front-end/Backend Developers, QA, and DevOps teams.

Skills

Backend development

REST APIs

Microservices

API integration

JWT/OAuth security

Git & CI/CD

Debugging & troubleshooting

Tools

Java / Spring Boot

.NET

Node.js

Job description

Job Description: Enterprise Service Layer (ESL) Developer

Job Title: Enterprise Service Layer (ESL) Developer
Experience: 5+ Years
Employment Type: Full-Time
Location: Onsite / Offshore / Hybrid, as applicable

Role Summary

We are looking for an experienced Enterprise Service Layer (ESL) Developer to design, develop, and maintain APIs and integration services connecting digital applications with enterprise backend systems.

The ideal candidate should have strong hands‑on experience in REST APIs, microservices, backend development, and enterprise system integration.

Key Responsibilities

• Design, develop, test, and maintain Enterprise Service Layer services and APIs.
• Develop REST APIs and microservices to integrate applications with backend systems.
• Build and maintain integrations between digital applications and enterprise systems.
• Develop integration services using appropriate API and messaging approaches.
• Handle API validation, transformation, error handling, and logging.
• Troubleshoot API, integration, and production issues.
• Write clean, reusable, maintainable, and testable code.
• Participate in code reviews and follow API and development standards.
• Collaborate with Architects, Commerce Developers, Front‑End Developers, Backend Developers, QA, and DevOps teams.

Must‑Have Skills

• Strong hands‑on experience in backend, API, middleware, or enterprise integration development.
• Strong experience developing REST APIs and microservices.
• Proficiency in at least one backend technology:
  • Java / Spring Boot
  • .NET
  • Node.js
• Experience integrating applications with enterprise/backend systems.
• Good understanding of JSON, HTTP/HTTPS, and web services.
• Understanding of API integration patterns.
• Experience with API authentication and authorization.
• Experience with Git and CI/CD practices.
• Strong debugging, troubleshooting, and problem‑solving skills.

Good‑to‑Have Skills

• Experience with API Gateway or API Management solutions.
• Knowledge of messaging or event‑driven integration.
• Experience integrating with Commerce/eCommerce platforms.
• Exposure to cloud environments such as Azure, AWS, or Google Cloud.

Experience Required

• 5+ years of overall software development experience.
• At least 3+ years of hands‑on experience in API development, microservices, middleware, backend development, or enterprise integration.
• Proven experience integrating applications with enterprise/backend systems.
• Hands‑on experience with Java/Spring Boot, .NET, or Node.js.
• Experience in Commerce/eCommerce integration environments is preferred.