Senior Ruby Developer RoR, ReactJS

Top 3 Reasons To Join Us The Job About TrustifyTechnology Trustify Technology is a fast-growing software engineering and digital transformation company providing AI-driven software development, verification & validation, and automation solutions for global clients across the US, UK/EU, Japan, and Singapore. Trustify aims to be the top-tier technology outsourcing partner from Vietnam, combining human expertise with AI power to deliver high-quality, cost-effective solutions. About Ruby Developer Position We’re looking for a talented Full-stack Developer (Ruby on Rails + React/TypeScript) to help build and scale innovative travel tech products. You’ll work directly with our UK team, contributing to impactful features used by real customers. If you enjoy solving complex problems in a fast-paced, international environment, this role is for you. Responsibilities Take ownership from requirement clarification through system architecture, technical design, technical solutions, implementation, and delivery. Work directly with UK stakeholders to understand requirements, clarify technical details, and propose effective solutions. Design and implement scalable backend systems and RESTful APIs, considering performance, maintainability, and reliability. Build modern, responsive UI using React, TypeScript, and Rails Frontend technologies. Identify technical risks, performance bottlenecks, and areas for improvement, and drive appropriate solutions. Establish and maintain coding standards, testing practices, and development best practices. Conduct code reviews, provide technical guidance, and mentor junior and mid-level developers through knowledge sharing within the team. Your Skills and Experience 5+ years of professional experience with Ruby on Rails. Strong understanding of database design and performance optimization; proven ability to design and build scalable, maintainable backend systems with a focus on code quality and reliability. Experience with React and TypeScript. Experience with Rails frontend technologies (ERB, Hotwire, Turbo, or similar). Experience with Docker and deploying applications to cloud environments; familiarity with GCP and Kubernetes is a plus. Experience with code review, technical decision-making, and mentoring is preferred for the Lead level. Good English communication skills, with the ability to work directly with international clients. Why You'll Love Working Here Flexible working hours (core time: 9:00 AM – 6:00 PM, Monday to Friday) + 1 WFH day per week Healthcare: Annual healthcheck-up, Premium Health Insurance. 12 annual leaves+ holidays. 13th-month salary. Annual project bonus Year End Party (YEP), companytrip, team buildingactivities. Marriage gift, Lunar New Year gifts, sick leave support, funeral/maternity support. Working devices provided.