Java Software Engineer

Job Description: Java Engineer

Position Title:
Java Engineer

Department:
Software Development

Location:
Karachi, Pakistan (Hybrid/Remote options available)

Experience Required:
3–5 Years

About A20Six

A20Six Technologies (Pvt.) Ltd. is a technology-driven firm built by professionals with decades of hands-on experience in
engineering, securing, and scaling technology platforms
across fintech, enterprise IT, cybersecurity, and cloud ecosystems.

With over 25 years of combined leadership experience, our team delivers
end-to-end technology and digital transformation solutions
for financial and non-financial institutions globally.

We're looking for a
Java Engineer
to join our growing engineering team — someone passionate about building scalable, secure, and high-performance systems that empower businesses to innovate faster and operate more efficiently.

Role Overview

As a
Java Engineer
at A20Six, you will be responsible for designing, developing, and maintaining enterprise-grade applications and microservices using modern Java frameworks. You will collaborate closely with cross-functional teams to build secure, reliable, and scalable backend systems aligned with business and compliance objectives.

This role demands strong problem-solving skills, technical acumen, and the ability to translate complex business requirements into robust software solutions.

Key Responsibilities

• Design, develop, and maintain
  RESTful APIs
  and
  microservices
  using
  Spring Boot
  and related frameworks.
• Participate in all phases of the
  software development lifecycle
  — including requirement gathering, design, implementation, testing, deployment, and maintenance.
• Integrate and optimize databases such as
  MySQL, PostgreSQL, and MongoDB
  for high-performance backend systems.
• Implement secure and efficient code following best practices,
  OWASP guidelines
  , and
  enterprise security standards
  .
• Collaborate with frontend teams to define API contracts and ensure seamless integration.
• Work with
  Kafka
  and message queues for asynchronous communication and distributed processing.
• Contribute to system architecture discussions, design reviews, and performance optimization initiatives.
• Participate in code reviews to ensure quality, maintainability, and compliance with company coding standards.
• Implement caching mechanisms and performance tuning for scalability and responsiveness.
• Collaborate with
  DevOps
  teams to integrate CI/CD pipelines and automate deployments.
• Write
  unit tests (JUnit)
  and maintain code documentation to ensure long-term maintainability.

Required Skills and Qualifications

• Bachelor's degree
  in Computer Science, Software Engineering, or a related field.
• 3–5 years of professional experience in
  Java development
  with a focus on backend systems.
• Hands-on experience with
  Spring Boot
  ,
  Spring MVC
  ,
  Hibernate/JPA
  , and
  REST API development
  .
• Strong understanding of
  microservice architecture
  , distributed systems, and integration patterns.
• Proficiency in working with
  MySQL, PostgreSQL, MongoDB
  , and caching technologies (e.g., Redis).
• Familiarity with
  CI/CD pipelines
  , containerization (
  Docker
  ,
  Kubernetes
  ), and modern DevOps practices.
• Solid grasp of
  object-oriented design principles
  ,
  design patterns
  , and
  clean coding standards
  .
• Strong understanding of
  application security
  , including authentication, authorization, and data protection.
• Excellent analytical, communication, and problem-solving skills.
  Preferred Skills (Nice to Have)
• Experience in
  Fintech
  or
  Banking
  domains.
• Exposure to
  cloud platforms
  (AWS, Azure, Huawei Cloud).
• Familiarity with
  Agile/Scrum
  methodologies.
• Experience with
  test-driven development (TDD)
  and automation testing frameworks.
• Understanding of
  API Gateway
  ,
  service discovery
  , and
  load balancing
  concepts.

Key Attributes

• Proactive and self-driven with a strong sense of ownership.
• Detail-oriented, organized, and committed to quality and deadlines.
• Ability to collaborate effectively in cross-functional teams.
• Passion for continuous learning and emerging technologies.