Senior Backend Engineer

JOB DESCRIPTION

Design, build, and operate backend services that power a leading B2B SaaS platform for the construction industry.
Design clean, maintainable, and extensible software architecture.
Identify and resolve performance bottlenecks (query optimization, caching, async processing).
Drive software quality through automated testing, code reviews, observability, and CI/CD practices.
Review and validate AI-generated code to ensure maintainability, correctness, and security.
Mentor engineers and raise the team's engineering bar.
Development environment:
Backend: Ruby (on Rails), Golang, Amazon Aurora (MySQL), DynamoDB
FrontEnd: Nuxt.js, Vue.js, Next.js, ReactJS
Mobile App: Kotlin, Swift, Flutter
Deploy/ Build: AWS Amplify, CodePipeline, CodeBuild, CircleCI, GitHub Actions
Others: Swagger, Docker, Figma, Confluence, JIRA, esa, gRPC
Infrastructure: Helm, Terraform
Automation test: Autify, Magicpod

JOB REQUIREMENT

Education: A bachelor's degree in Computer Science, Software Engineering, Artificial Intelligence, or related field (equivalent experience accepted); a Master's degree is a plus.
Experience: 5+ years of intensive experience in backend development, with a proven track record of designing, building, and deploying complex, large-scale, and high-traffic software systems (Any language: Go, RoR, Python, Java, C#, or Node.js).
Critical use of AI coding tools: you use tools like Claude Code, GitHub Copilot, and Cursor to move faster, and you verify what they produce: checking for hallucinated APIs, security issues (injection, exposed secrets), architectural fit, and writing your own tests to validate the generated logic.
Hands-on experience with observability platforms (Datadog, CloudWatch, Prometheus/Grafana).
Business-level communication skills in Vietnamese and English (for daily collaboration with Japan HQ and documentation).
Nice to Have:
Experience with Go or Ruby (Rails) our current primary stacks.
Microservices experience: service boundaries, gRPC/REST API design, message queues, distributed transaction patterns.
Cross-functional collaboration: Ability to converse effectively with Frontend teams (React/TS) and DevOps teams (AWS/Kubernetes) to ensure end-to-end system reliability.

WHAT'S ON OFFER

Competitive salary package, including full insurance coverage
Annual performance review: twice/ year
Year-end Bonus
Hybrid working model
12 days of annual leave and maximum of 6 days for New Year Leave
Premium Healthcare Insurance Package starting from day one
Annual Health Check-up
Excellent career development opportunities, with exposure to and experience in the latest technologies
Patents and Inventions bonus
Company trip, Year-End Party, Gifts for Tet/ Holidays
MacBook Pro/ Laptop is provided

CONTACT

PEGASI – IT Recruitment Consultancy | Email: recruit@pegasi.com.vn | Tel: +84 28 3622 8666
We are PEGASI – IT Recruitment Consultancy in Vietnam. If you are looking for new opportunity for your career path, kindly visit our website www.pegasi.com.vn for your reference. Thank you!

Job Summary

Company Type:

Product

Technical Skills:

Location:

Ho Chi Minh, Ha Noi - Viet Nam

Working Policy:

Hybrid

Job ID:

J02230

Status:

Active

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