[HN/HCM/Hybrid] Senior/ Principal Backend Engineer

About ANDPAD Vietnam:

ANDPAD Vietnam is a key part of ANDPAD Inc., the provider of Japan‘s No.1 cloud-based construction project management service. With over 684,000 users, our platform is a leader in digitalizing the construction industry, from communication and scheduling to quality and order management.

Our team of Software Engineers at ANDPAD Vietnam enjoys a dynamic international environment focused on creative engineering. Instead of handling repetitive tasks, you‘ll be involved in developing innovative SaaS products that solve real-world problems for our clients and users.

The Opportunity:

We are hiring a Senior Backend Engineer and we don‘t care which language you write today.

In the AI era, syntax is cheap. An engineer with strong backend fundamentals - system design, data modeling, testing discipline, production operations can become productive in a new language within weeks, especially with AI-assisted tooling.

So this position is language-agnostic by design. We evaluate you on core engineering skills, not familiarity with our current stack. If you‘ve built and operated serious backend systems in Java, Python, C#, PHP, Node.js, Elixir, or anything else - you‘re a candidate.

While our hiring process is language-agnostic, please note that our primary development stacks are Ruby on Rails and Golang. We support engineers in transitioning to these technologies if they are not already familiar.

Job Scope:

• 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

Requirements:

Must Have:

• 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: 8+ 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.

Why you‘ll love working here

• 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