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Software Engineer, SRE - US App

• Employment Status: Full-time employee
• Work Hours: Full Flextime (no core time)
• Office: Roppongi

For more details, see the Overview of Our Positions section on our Careers site.

About Mercari
Circulate all forms of value to unleash the potential in all people.

"What can I do to help society thrive with the finite resources we have?" The Mercari marketplace app was born in 2013 out of this thought by our founder Shintaro Yamada as he traveled the world. We believe that by circulating all forms of value, not just physical things and money, we can create opportunities for anyone to realize their dreams and contribute to society and the people around them. Mercari aims to use technology to connect people all over the world and create a world where anyone can unleash their potential. For more information about Mercari Group's mission, see Mercari's Culture Doc.

Organization/Team Mission
Mercari Engineering Principles

Mercari Engineering Principles are a shared understanding that serves as the foundation of engineering beliefs and behavior at Mercari. The Engineering Principles are designed to complement the organizational identity (Mercari's mission, values, and culture) from an engineering viewpoint.

These Principles Ultimately Help Us Achieve Mercari's Mission By Defining The Ideal State We Seek To Realize In The Long Term

• Passion For The Product
• Grow Together
• Solve Through Mechanisms
• Collaborate Openly

For More Details, Please See The Following Link

• Engineering Culture

SRE at Mercari US is responsible for building and running software to improve the availability, scalability, latency, and efficiency of our system as a whole, while also maintaining and operating shared components, and providing ad-hoc support for cloud infrastructure to non-engineering teams.

Recent Or Ongoing Initiatives Include

• Implementing Data Archival Processes to improve efficiency of our self-hosted MySQL shards
• Zero downtime migration of MySQL from 5.7 to 8
• Collaborating with Compliance team to detect and deter fraud and spam
• Working with the web team to improve response latency for item pages and perform technical SEO optimizations
• build an AI agent platform for incident response that automatically investigates ongoing alerts using internal sources like github repos, grafana metrics, slack messages, jira tickets etc.

See here for more information about our mission and values.

Work Responsibilities

• Operate and Maintain shared components used by multiple teams in Mercari US, impacting overall production reliability
• Define and Measure System Reliability Goals using SLO/SLIs
• Continuously monitor capacity, performance, and cost of systems in both production and development
• Build, run, and integrate software to improve the availability, scalability, latency, and efficiency of our system as a whole
• Define, manage and run Incident Management Processes (on-call, incident response, postmortem)
• Mentor junior engineers, lead code reviews, and actively contribute to architectural decisions and technical documentation.
• Collaborate with cross-functional teams including product, engineering, and QA to deliver high-impact features and improvements.

Unique Challenges

• Be a part of a small distributed team with oversight over Mercari US's entire infrastructure, delivering value to millions of daily active customers across the US.
• Take ownership and shape the vision of an entire domain. Everyone in the team has strong foundational knowledge and is encouraged to take ownership of a specific area (o11y, DX, databases etc.) to sharpen their expertise.
• SRE is our domain, but we work very closely with the product/cx/marketing teams to ensure our users come first. If there is any way we can leverage our knowledge, we shift priorities and act swiftly as a team.
• Be the voice of Mercari US for our group-wide shared platform components.
• Work in a globally distributed team, collaborating with teammates in both Tokyo and the US, to deliver impactful solutions across time zones and cultures.

Qualifications

• Required Experience/Skills

• 5+ years of experience working with and administrating

• production DBMS/MySQL clusters

• Cloud Native environments (GCP/AWS/Azure)

• Docker and Kubernetes

• 5+ years of professional experience maintaining and operating infrastructure

• Bachelor's degree in Computer Science, Software Engineering, or a related field (or equivalent practical experience).
• Experience and Passion for optimizing performance of databases/networking/microservices
• Strong programming expertise in any programming language
• Excellent English communication skills, with the ability to collaborate effectively across functions and regions.

• Demonstrated ability to mentor and guide junior engineers.

• Preferred Experience/Skills

• Experience working with LGTM Stack (Loki Grafana, Tempo, Mimir) or OpenTelemetry

• Experience working with Cloudflare, Istio, GKE
• Experience building and operating microservices at scale in PHP or Go
• Domain knowledge of marketplace or e‑commerce platforms.

• Experience working within large, cross-functional and geographically distributed teams

• Language

• English: Business level (CEFR B2 or higher) required

Learn More About Mercari Group

• Careers site:
• Mercan:
• Social media: X / Linkedin

Recruiting at Mercari
At Mercari Group, we value empathizing with and embodying the mission and values of the Group and each company. To promote the creation of an organization that maximizes the total amount of value exhibited by all members, we would like to understand the experience and skills of each candidate as accurately as possible.

Recruiting cycle at Mercari Group

• Application screening
• Skill assessment: For engineering positions, you will be asked to complete a skill assessment on HackerRank or GitHub. For non-engineering positions, you may be asked to complete an assessment depending on the position. (The timing of the assessment may coincide with the interview process.)
• Interview: The number of interviews may vary depending on the position.
• Reference check: We will ask for online references around the timing of the final interview.
• Offer: Offers will be determined carefully in consideration of the final interview and the reference check.

Learn more about our recruiting process here.

Equal Opportunity Hiring
Here at Mercari, we work to realize a world in which no one's potential is limited by their background and everyone has the opportunity to freely create value. We also firmly believe that a mindset of Inclusion & Diversity is essential for us to achieve our mission.

This, of course, extends to our hiring practices as well. Mercari is committed to eliminating discrimination based on age, gender, sexual orientation, race, religion, physical disability, and other such factors so that anyone who shares our mission and values can join us, regardless of their background. For more details, please read our I&D statement.

Please read and acknowledge our Privacy Policy prior to submitting your application.