Principal Engineer

4 days ago

Ho Chi Minh City, Ho Chi Minh, Vietnam Sunbytes Full time ₫120,000 - ₫240,000 per year

About Sunbytes
Sunbytes is a leading
Tech & Talent Solutions company
known for innovative and scalable solutions. We focus on achieving goals for our partners and team members, delivering high-quality products and services, and fostering a supportive, challenging work environment.

About the Role

On behalf of our client
—
a
leading global SaaS and Fintech company

developing
cloud-based business platforms

used by millions of users in Asia.

They specialize in
financial management

and
HR solutions

that help enterprises digitize operations and optimize performance.

Our client is hiring a
Principal Engineer (Ruby on Rails)

to join their Vietnam product engineering team. You'll take the lead in
building and optimizing backend systems

for a large-scale HR SaaS product, while
mentoring other engineers

and ensuring
system performance and scalability
.

Key Responsibilities

  • Design and develop backend services that can handle
    large-scale data and complex business logic.
  • Architect and optimize database design to meet both
    functional and non-functional requirements.
  • Write
    clean, maintainable, and scalable code
    in Ruby on Rails.
  • Continuously
    refactor and improve
    code quality and performance.
  • Monitor system performance,
    identify bottlenecks, and implement performance tuning.
  • Ensure application reliability, security, and scalability in production.
  • Mentor and support
    junior and mid-level engineers.
  • Collaborate closely with international product teams to align on technical direction and delivery quality.

Requirements

  • *8+ years*

of experience in backend development, with
*4–5+ years*

focusing on Ruby on Rails.
- Proven experience in
*system architecture design
&
API integration*

with external systems.
- Strong understanding of
*SOLID principles
,
design patterns
,
and engineering best practices.
- Hands-on experience with
MySQL/PostgreSQL
,
including performance tuning and optimization.
- Familiarity with
CI/CD pipelines*

and
*Docker
.
- Experience with
application performance monitoring
,
E2E testing
,
and
automation frameworks
.
- Deep understanding of
web security*

and data protection principles.
- *Leadership experience*

in leading/mentoring engineering teams.
- Strong
*English communication*

skills (technical discussion & cross-team collaboration).
- A strong sense of
*ownership
,
accountability
,
and
problem-solving mindset
.*

(Nice-to-have)

  • Experience with
    *AWS*

or other cloud infrastructure.
- Knowledge of
*frontend technologies*

(TypeScript, ReactJS,VueJS, etc.)
- Experience operating
*production systems*

in a SaaS environment.
- Passion for
*mentoring*

and helping others grow technically.

Benefits

  • Hybrid & flexible working hours.
  • Full salary + insurance during probation.
  • 13th-month bonus & salary review twice a year.
  • Private health insurance (family coverage at management level).
  • 16–24 paid leave days + 5 paternity days.
  • Annual trip, team building, and training opportunities.
  • Clear career path & recognition programs.

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