[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), DynamoDBFrontEnd: Nuxt.js, Vue.js, Next.js, ReactJSMobile App: Kotlin, Swift, FlutterDeploy/ Build: AWS Amplify, CodePipeline, CodeBuild, CircleCI, GitHub ActionsOthers: Swagger, Docker, Figma, Confluence, JIRA, esa, gRPCInfrastructure: Helm, TerraformAutomation 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 hereCompetitive salary package, including full insurance coverageAnnual performance review: twice/ yearYear-end BonusHybrid working model12 days of annual leave and maximum of 6 days for New Year LeavePremium Healthcare Insurance Package starting from day oneAnnual Health Check-upExcellent career development opportunities, with exposure to and experience in the latest technologiesPatents and Inventions bonusCompany trip, Year-End Party, Gifts for Tet/ HolidaysMacBook Pro/ Laptop is provided