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Senior Full Stack Software Developer

Aigen · Huai Khwang, Bangkok

📅 04/08/2026
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Job Description As a Senior Full Stack Developer, you will play a key role in designing and building features end-to-end across the frontend, backend, and data layers — while also helping shape and lead a growing engineering team. You'll deliver high-quality software to enterprise customers and grow into a Team Lead role over time. Here's what your role looks like: Product Development & Architecture Design and build features end-to-end, translating Product Requirements into working software that ships to enterprise customers Partner with Product Owners, AI/ML Engineers, and Solution Architects to refine requirements and propose better technical approaches before implementation Backend Development Develop and maintain RESTful APIs with clear contracts, proper authentication, and attention to performance and security Design and evolve database schemas, including indexing, migration planning, and writing efficient queries for both transactional and analytical use cases Frontend Development Build responsive, accessible web interfaces that handle real enterprise data volumes and workflows AI/ML & Third-Party Integration Integrate with internal AI/ML services and third-party APIs — including LLM APIs, RAG pipelines, and document intelligence — in a reliable and observable way Quality, Deployment & Operations Write unit, integration, and end-to-end tests, participate in code reviews, and contribute to engineering standards and shared libraries Deploy and monitor your code through CI/CD pipelines, respond to production incidents, and continuously improve system reliability Document technical designs, API contracts, and operational runbooks to support team scalability and knowledge sharing Team Building & Leadership Help structure and grow the engineering team — contributing to hiring, onboarding, and shaping team practices as we scale Mentor and coach team members through code reviews, pair programming, and knowledge-sharing sessions Establish and champion engineering best practices, coding standards, and development workflows across the team Grow into a Team Lead role, taking ownership of technical direction, sprint planning, and team performance Foster a culture of collaboration, ownership, and continuous improvement Qualification Bachelor's degree in Computer Engineering, Computer Science, or a related field 5+ years of hands-on experience as a Full Stack Developer in a technology or software company Strong proficiency in Next.js, React, and TailwindCSS for building responsive, production-grade web applications Strong proficiency in Node.js backend development using Express.js and/or NestJS Solid understanding of relational databases (PostgreSQL, MySQL, or SQL Server), including schema design and writing non-trivial queries Hands-on experience with AI-assisted development tools (e.g., Claude Code, Codex, GitHub Copilot, Cursor) as a core part of your daily engineering workflow Working experience with Git, code review practices, CI/CD pipelines, and cloud platforms (AWS, Azure, or GCP) Hands-on experience with AWS (EC2, S3, RDS, IAM) and containerized applications Demonstrated leadership qualities — whether through mentoring, leading projects, or driving technical initiatives — with the ambition to grow into a Team Lead role Nice to Have Experience integrating with AI/ML services or LLM APIs Familiarity with container orchestration (ECS/Fargate or EKS) Prior experience leading or mentoring a small engineering team Why work with us? Competitive salary based on experience Online courses and career development programs Annual health checkup Health and life insurance Dental allowance Provident fund Company-sponsored laptop Annual company outing
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