Application Engineer (Ruby)
freeC's Client

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Full time
Hiring 1 people
5 years of experience
Ho Chi Minh
Published 09/03/2026

Job Description

  • Design and develop software applications for both internal systems and external clients, primarily using Ruby.
  • Participate in the full software development lifecycle, including analysis, detailed design, coding, testing, and solution review.
  • Apply established software design patterns to build scalable and maintainable subsystems.
  • Utilize AI-powered tools to support documentation, research, and improve productivity across the development lifecycle.
  • Contribute to development processes by integrating AI into tasks such as requirement analysis, coding, code review, and testing automation.
  • Write clean, efficient, and testable code while adhering to established coding standards.
  • Develop and execute unit tests to ensure the reliability and quality of the application.
  • Work closely with team members and escalate issues to senior developers or team leads when necessary.
  • Participate in meetings and communicate effectively in basic English when discussing technical matters.
  • Maintain a proactive attitude toward learning and continuous improvement.


Requirements:

  • At least 5 years of software development with Ruby on Rails
  • Strong understanding of software design patterns and system architecture.
  • Experience working with relational databases such as MySQL, PostgreSQL, or Oracle.
  • Experience in code analysis, investigation, detailed design, and solution review.
  • Basic knowledge of containerization and cloud technologies, including Docker, Kubernetes, AWS (EC2, S3, VPC), and CI/CD tools such as GitHub Actions.
  • Ability to complete assigned tasks accurately and within deadlines.
  • Strong attention to coding standards and best practices.
  • Ability to collaborate effectively and communicate clearly within the team.


Preferred Qualifications

  • Previous experience in a team leadership role.
  • Knowledge of secure coding practices and security-focused code reviews.
  • Experience with Test-Driven Development (TDD) using RSpec.
  • Familiarity with Redis for caching and search technologies such as Solr or Elasticsearch.
  • Experience with modern frontend technologies such as Hotwire (Turbo, Stimulus) and Tailwind CSS.
  • Strong database knowledge and ability to optimize database interactions.
  • Ability to reuse and modularize system features and functions effectively.
  • Experience creating test cases from specifications and executing tests based on defined test plans.

Skills

Ruby
English

Benefits

  • Performance-based year-end bonus and regular performance evaluations.
  • Recognition programs for outstanding employees on a quarterly and annual basis.
  • Paid annual leave and company holidays in accordance with labor regulations, with additional leave granted based on tenure.
  • Comprehensive healthcare and insurance coverage for employees.
  • Company-sponsored activities including annual trips, health check-ups, and team events.
  • Gifts and support for special occasions such as birthdays, weddings, childbirth, and other milestones.
  • Quarterly team-building allowances and support for professional certification exams.
  • Employee referral program with rewards for successful recommendations.
  • Additional internal activities to foster engagement and team collaboration.
  • Working schedule: Monday to Friday during standard business hours.
  • Hybrid working model: Combination of office-based and remote working days.
Company Info
freeC's Client
Ho Chi Minh
101-300 employees
https://freec.asia/
Ho Chi Minh
101-300 employees
https://freec.asia/
HRTech
IT/ Web

About

freeC is the Smart Recruiting Platform that leverages matching technology to actively connect hundred of thousand of employers and job seekers. The success of freeC is determined by our success in operating as a unified team. If you're interesting, ambitious, and eager to advance your career with us, explore our vacancies as below. We're excited to have you on board our ship to help us grow fast, deliver on our mission of actively connecting employers and job seekers around Vietnam

Working Address

Lầu 06, Tòa nhà BCONS TOWER II , Số 42/1, Đường Ung Văn Khiêm, Phường 25, Quận Bình Thạnh, TP. HCMView map