Full Stack Engineer

Systems Limited; Punjab; On-site; PKR 1,800,000 - 2,400,000; Full time

Job summary

Systems Limited seeks a seasoned Java backend engineer to design, develop, and maintain secure, scalable applications using Spring Boot. You will implement REST/SOAP APIs, manage microservices, and ensure robust data interchange with JSON/XML.

You will collaborate with frontend teams using React, apply best-practice design patterns, and contribute to CI/CD pipelines in an AWS-enabled environment. Strong security focus required.

Qualifications

• Must be able to work with Java/Spring-based backends in production environments.
• Experience building secure, scalable REST/SOAP APIs and microservices.
• Proficiency in JSON/XML data interchange and serialization.
• Strong understanding of design patterns and system design principles.
• Knowledge of CI/CD pipelines and cloud deployment practices.

Responsibilities

• Develop and maintain backend applications using Java and Spring Boot.
• Implement RESTful and SOAP APIs and manage microservices architecture.
• Collaborate on frontend work using React to deliver integrated solutions.
• Handle data interchange with JSON/XML and serialization tasks.
• Apply design patterns and conduct design reviews for maintainable code.
• Implement encryption, secure communications, and TLS/RSA/AES standards.

Skills

Java

Spring Framework

Microservices

REST/SOAP APIs

JSON/XML

Encryption/Security

CI/CD

Database Management

Git

Testing (JUnit/Mockito)

Cloud AWS

Design Patterns

HTTP/HTTPS

Kubernetes

Docker

Education

Bachelor's degree in Computer Science

Tools

Jenkins

GitLab CI

GitHub Actions

Docker

Kubernetes

MySQL

PostgreSQL

MongoDB

Redis

Job description

Develop and Maintain Backend of Applications

• Design, develop, and maintain secure, scalable applications using Java and Spring Boot.
• Implement robust RESTful APIs, SOAP APIs, and microservices for seamless integration with other services.

Develop and Maintain Web Applications Frontend

• Contribute to web frontend development using React JS to build integrated, end-to-end solutions

Data Interchange and Serialization

• Work with JSON and XML for data interchange between services and handle data serialization/deserialization effectively.

System Design and Architecture

• Apply design patterns and architectural best practices to build efficient, maintainable code.
• Conduct system and component design reviews to ensure compliance with best practices and standards.

Encryption and Security

• Implement and manage encryption/decryption mechanisms to ensure data security and compliance.
• Ensure secure communication protocols and data storage using encryption standards like AES, RSA, and TLS.

Production Deployment and Maintenance

• Oversee production deployments, ensuring zero downtime and robust rollback mechanisms.
• Monitor applications post-deployment, handle troubleshooting, and improve system stability.
• Establish and manage CI/CD pipelines using tools such as Jenkins, GitLab CI, or GitHub Actions.
• Ensure smooth deployment workflows with automated testing and configuration management.

Database Management

• Develop database schemas, write optimized queries, and manage integrations with relational databases like MySQL, PostgreSQL, or Oracle.
• Experience with NoSQL databases such as MongoDB, Cassandra, or Redis is a plus.

HTTP Protocol and Communication

• Deep understanding of HTTP, HTTPS, and secure communication standards.
• Experience with HTTP methods (GET, POST, PUT, DELETE) and status codes.

Testing and Quality Assurance

• Implement unit testing, integration testing, and functional testing using frameworks like JUnit and Mockito.
• Write and maintain thorough test cases to ensure code quality and functionality.

Collaboration and Mentorship

• Collaborate with cross-functional teams (Product, DevOps, QA) to achieve project goals.
• Mentor junior developers, fostering best practices in code quality, documentation, and testing.

Required Skills

• Must be able to communicate fluently & effectively in English
• Java: Strong expertise in Java (preferably Java 11 or later versions).
• Spring Framework: Advanced knowledge of Spring Boot, Spring Data, Spring Security, and Spring Cloud.
• Design Patterns: Deep understanding of design patterns (e.g., Singleton, Factory, Observer) and their practical applications.
• Microservices Architecture: Experience in developing and managing microservices-based architectures.
• SOAP and REST APIs: Hands-on experience with both RESTful and SOAP APIs.
• JSON/XML: Proficiency in JSON and XML for data interchange and processing.
• HTTP Protocols: Solid understanding of HTTP/HTTPS protocols, methods, and secure communication standards.
• Encryption/Decryption: Experience implementing encryption/decryption for secure data storage and transfer (AES, RSA, TLS).
• CI/CD Pipelines: Proficiency in CI/CD tools like Jenkins, GitLab CI, or GitHub Actions.
• Database Management: Hands-on experience with relational databases (MySQL, PostgreSQL) and familiarity with NoSQL databases (MongoDB, Redis).
• Version Control and Collaboration: Git for version control; JIRA, Confluence, or similar tools for collaboration.
• Testing Frameworks: Proficient with JUnit, Mockito, or other testing frameworks for unit and integration testing.
• Cloud Platforms: Experience with cloud services such as AWS is highly desirable.

Preferred Qualifications

• Experience with containerization (Docker) and orchestration tools (Kubernetes).
• Exposure to Agile/Scrum methodologies.

Experience Required

6+ years of hands-on experience in Java

Qualifications

Bachelor’s degree in computer science or related discipline