Principal Ruby on Rails Engineer

ABOUT CLIENT

Our client is a big fintech company from Japan

JOB DESCRIPTION

Develop and create services to efficiently manage large volumes of data
Create a robust database that meets both functional and non-functional demands
Write and maintain clean, manageable code
Enhance code through ongoing refactoring
Monitor and optimize application performance, addressing system failures
Provide training to junior and mid-level team members

JOB REQUIREMENT

5+ years of development experience with Ruby on Rails
Proficiency in MySQL or PostgreSQL, including performance tuning and optimization
Experience in designing complex system architectures with API integration to external systems
Proficiency in application performance monitoring and optimization
Proficiency in automation testing and end-to-end testing
Deep knowledge of web security
Familiarity with CI/CD, Docker
Strong English communication skills
Ownership mindset
Experience with Amazon Web Services
Production experience with service operations
Frontend development experience with TypeScript, ReactJS, or VueJS

WHAT'S ON OFFER

Employees have the flexibility to work two days in the office and three days from home
Work hours are flexible, with the option to start between 8AM-9AM from Monday to Friday
Full salary during the probation period
Eligibility for various insurance benefits, including social, health, and unemployment insurance, as well as private health and accident insurance
Additional perks such as a 13th-month salary, 16-24 paid days off, and paternity leave
Opportunities for annual company trips, quarterly team building activities, and participation in billiards and running clubs
Access to an annual health check and well-equipped facilities, including a MacBook Pro and additional monitor
Clearly defined career paths for employees
Sponsorship for foreign language and international technology-related certifications
Access to both internal and external training courses, soft-skill workshops, and tech seminars
Recognition awards and biannual performance and salary reviews (in June and December)

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:

Ruby, BSE/BrSE, Java, Kotlin, RoR/Rails

Location:

Ho Chi Minh - Viet Nam

Working Policy:

Hybrid

Job ID:

J00927

Status:

Close

Related Job:

AI Engineer

Ho Chi Minh - Viet Nam

Product

  • AI
  • Python

#AI-Powered Insurance Solutions Develop and deploy machine learning models to support insurance recommendation, pricing, risk assessment, and claims automation Build and maintain AI-powered features integrated into our embedded insurance platform - from data pipelines to inference APIs Design and implement RAG (Retrieval-Augmented Generation) pipelines and LLMbased assistants for internal and customer-facing use cases Collaborate with product and engineering teams to translate business requirements into practical AI solutions Participate in the full ML/AI lifecycle: data collection, feature engineering, model training, evaluation, deployment, and monitoring Contribute to our internal AI agent framework - building, testing, and improving multiagent workflows using LangChain, LangGraph, or similar tools Ensure AI models and services meet performance, reliability, and compliance standards in a regulated (insurance) environment Participate in developing CI/CD workflows for AI/ML/Data pipelines. Contribute to Agent Development Toolkits (ADK) and the automated Software Development Life Cycle (SDLC) that accelerate AI-native feature delivery#R&D & Engineering Tasks Research and experiment with state-of-the-art AI/ML techniques and evaluate their applicability to insurance use cases Prototype new AI capabilities quickly, iterate based on feedback, and graduate successful experiments into production Document experiments, model architectures, and engineering decisions clearly for team knowledge sharing Stay current with the AI ecosystem (LLM advances, agent frameworks, tooling) and bring relevant insights back to the team Support Full Stack Engineers in using the AI Development Toolkit (ADK) to develop applications - guiding and enabling their use of the toolkit rather than building the applications yourself - and maintain a basic understanding of the SDLC to help ensure consistent engineering standards across the platform Contribute to and continuously enhance the system knowledge base, ensuring documentation, patterns, and learnings are accessible to the agents

Negotiation

View details

Backend Engineer

Ho Chi Minh - Viet Nam

Product

  • Typescript
  • NodeJS
  • Python
  • AI

Build the core gateway: a unified, OpenAI-compatible API in front of multiple providers (OpenAI, Anthropic, Google, plus self-hosted and OSS models). Own provider routing and reliability: load balancing, automatic failover, and cost and latency-aware routing. Build billing and metering that is correct, not approximate: per-request token accounting, usage ledgers, cost attribution per team, user, and key, budgets, and spend limits. Ship org controls: API key management, per-team and per-user quotas, rate limiting, and RBAC. Handle streaming and performance: low-overhead proxying, streaming responses, connection handling, and caching where it helps. Contribute to the Jan Agent and connect it to the router: route its model and tool calls through the gateway, and make agent traffic first-class in metering, controls, and observability. Make deliberate speed-versus-correctness calls: move fast where iteration is cheap, refuse to cut corners where a bug means a bad charge or a leaked key, and pay down debt on your own initiative.

Negotiation

View details

Senior Backend Engineer (Shop 6.0)

Ho Chi Minh - Viet Nam

Outsource

  • NodeJS
  • Azure

Design and develop the backend services for the core areas of Shop 6.0 (catalog, orders, payments, ERP Cloud integration) Define API boundaries and ensure consistent, scalable communication between services Own reliable data synchronization between the ERP Cloud and the platform, including error handling and recovery mechanisms Optimize systems for performance and scalability (caching, asynchronous processing, read/write optimization) Establish observability standards (logging, monitoring, alerting) across all backend services Conduct code reviews, promote best practices, and support less experienced team members

Negotiation

View details