Senior Software Engineer

On; Cowbridge; On-site; GBP 60,000 - 80,000; Full time

Job summary

A leading company in material management is seeking a Senior Software Engineer to enhance software support for Sourcing and Operations teams. This role involves designing and developing scalable systems and APIs while collaborating closely with global stakeholders. Candidates with 5-6 years of backend experience, particularly in NodeJS (TypeScript), are preferred. The company offers a supportive environment focused on personal growth and operational excellence.

Benefits

Supportive team-oriented atmosphere

Opportunities for personal self-care

Focus on holistic development

Qualifications

• 5-6 years of backend experience with scalable systems.
• Experience designing and developing APIs.
• Solid understanding of operational excellence.

Responsibilities

• Design and develop foundational software for Sourcing and Operations teams.
• Build scalable communication tools and interfaces.
• Participate in architectural decision-making.

Skills

Backend development

NodeJS (TypeScript)

Problem solving

Communication skills (English, Vietnamese)

Proactive mindset

Experience with GraphQL and NestJS

Interest in AI and ML

Tools

AWS

GCP

Kafka

Job description

Our internal Operations in Sourcing and Material Management are growing strongly, and we’re looking for a Senior Software Engineer to join the Product Technology team and establish the foundations of our software support for these critical internal stakeholders. The focus of this role is on designing, developing, and operating digital services that will improve the speed and efficiency of our vital communications with suppliers and enhance our overall material management operations. You’ll be based in Ho Chi Minh City, working in close collaboration with cross-functional teams and Sourcing/Operations stakeholders globally.

Your Mission

You will design, develop, and operate the foundational software that supports our Sourcing and Operations teams, focusing on the following:

• Establish the Foundations of our software support for internal stakeholders by providing robust APIs, real-time events, and documentation.
• Improve the speed and efficiency of our vital communications with suppliers by building modern, scalable communication tools and interfaces.
• Improve our operations around material management by designing and developing systems that offer better visibility, control, and efficiency.
• Migrate and improve the robustness of our current solutions, ensuring seamless transitions and enhanced system stability.
• Iteratively deliver value and quality with your solutions to meet both technical and internal consumer needs.
• Build, release, and operate complex systems, owning and evolving the architecture that scales for our global operations.
• Participate in and drive architectural decision‑making through RFCs and design reviews to ensure scalability and resilience.
• Act as an expert in the given technology area, leverage best‑in‑class engineering practices, including continuous integration and deployment, code reviews, and high test coverage.

Your Story

• 5‑6 years of backend experience designing, building, testing, releasing, and operating scalable systems with a strong problem‑solving mindset and taking full ownership and accountability.
• Strong sense of autonomy and proactiveness, thriving in a fast‑paced environment.
• Strong experience within the NodeJS (TypeScript) eco‑system, designing and developing APIs (bonus if you have experience with GraphQL and NestJS).
• Facilitate discussion as well as guide and mentor your peers by delivering praise and constructive feedback.
• Interest in Artificial Intelligence (AI) and Machine Learning (ML).
• Product mindset comfortable in owning and building features from the ground up, understanding the “why,” applying holistic thinking and delivering for impact.
• Enjoy working with Stakeholders, understanding their problems, and proposing practical solutions.
• Excellent verbal and written communication skills in English and Vietnamese. Chinese is a plus.
• Bonus points: experience working with and designing distributed systems; competent in building and designing event‑driven systems (e.g., using Kafka); mastered automated testing, TDD, and performance debugging tools; hands‑on with operating the infrastructure on AWS or GCP.

Meet The Team

The Product Technology team empowers people and productivity through meaningful collaboration and a positive mindset. We strive to rethink the status quo and grow together. We ensure the correct information flow across internal and external teams and streamline operations by managing calendars, building SOPs, implementing software, and synthesizing data across many channels. The team aims for operational excellence with a global mindset as On’s R&D teams are located across the world.

What We Offer

On is a place that is centered around growth and progress. We offer an environment designed to give people the tools to develop holistically — to stay active, to learn, explore and innovate. Our distinctive approach combines a supportive, team‑oriented atmosphere, with access to personal self‑care for both physical and mental well‑being, so each person is led by purpose.

On is an Equal Opportunity Employer. We are committed to creating a work environment that is fair and inclusive, where all decisions related to recruitment, advancement, and retention are free of discrimination.