Mercari
Software Engineer (Site Reliability)
ãœãããŠã§ã¢ãšã³ãžãã¢ïŒãµã€ãä¿¡é Œæ§ïŒ
Tags: Full-time, 6~8 YOE, Business Japanese
Minato City, Tokyo, Japanã»Fetched 30+ days ago
Job Description
Team: Engineering

JD in Japanese follows. è±æã®åŸã«åæJDãã芧ããã ããŸãã
Software Engineer (Site reliability) - Mercari
- Employment Status:ãFull-time
- Work Hours: Full Flextime (no core time)
- Office: Roppongi
For more details, see the Overview of Our Positions section on our Careers site.ãã
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 Groupâs mission, see Mercariâs Culture Doc
ã
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 (Mercariâs mission, values, and culture) from an engineering viewpoint.
These principles ultimately help us achieve Mercariâs 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:
In the SRE Team drives the reliability, scalability, and operational excellence of Mercari Groupâs production services, including Mercari, Merpay, and Mercoin. We make customer experience observable through CUJ SLOs and turn those insights into meaningful service improvements. Working across Google Cloud and Kubernetes, we strengthen incident response, reduce toil, and build resilient systems. As AI accelerates development, we are advancing guardrails, autonomous operations, and cross-team collaboration to prevent incidents, recover faster, and improve products end to end.
See here for more information about our mission and values.
Work Responsibilities
- Operate hundreds of production microservices on Google Cloud (Kubernetes, managed services) under SLO targets, including on-support rotation for urgent issues.
- Lead end-to-end reliability epics independently â from design through rollout, monitoring, and post-launch iteration.
- Define and operate SLOs and SLIs for critical user journeys, using error budgets to prioritize work with product teams.
- Lead incident response, advance the team's postmortem culture, and drive follow-ups that prevent recurrence.
- Build autonomous AI agents for detection, triage, and recovery (log analysis, alert summarization, RCA, remediation) with clear safety.
- Write Infrastructure as Code with Terraform and build automation to reduce toil and scale operations across a large microservices environment.
- Build and maintain monitoring, alerting, and tracing on Datadog tied to user impact, with short detection-to-mitigation time.
- Perform reliability and performance tuning on production workloads (capacity planning, autoscaling, load shedding, dependency hardening).
- Partner with product and platform teams on production readiness reviews, capacity planning, and new infrastructure adoption.
- Strengthen reliability governance through engineering (risk assessment, audit response, compliance-as-code).
ã
Unique Challenges
- Driving reliability across a wide business portfolio (Marketplace and Fintech) at Mercari scale, through a CUJ SLO that grounds product decisions and operational policy in user impact.
- Working at the frontline of AI-driven development velocity and the operational strengthening it demands â you will help shape the SRE culture that emerges as engineers and autonomous agents share the work.
- Partnering with engineering teams that own reliability and resilience and act on data, so reliability improvements compound across the company.
- Balancing ~50% reactive work (alerts, on-support tickets, operations, incident response) with project delivery.
- Working in a bilingual environment: you use both Japanese and English every day, within the team and across teams.
ã
Qualifications
- Required Experience/Skills
- Production SRE experience with service ownership, availability targets, toil reduction, and operational readiness, including using SLOs and SLIs to prioritize reliability work alongside development teams.
- Experience operating production services at scale (>10K QPS, or owning multiple production microservices) under SLOs.
- Production experience with Google Cloud (compute, networking, managed services) and Kubernetes-based workloads.
- Infrastructure-as-Code experience (Terraform) and scripting in Go, Python, or shell.
- Hands-on experience with monitoring and observability (Datadog or equivalent), including alert design and reducing alert fatigue.
- Experience owning incident response, postmortems, and on-call or on-support rotations.
- Ability to lead epics end-to-end without teammate support.
- Willingness to learn and apply AI to operational workflows beyond your core SRE expertise.
- Preferred Experience/Skills
- Experience designing or running platform-wide SLO programs across multiple services or business units.
- Experience applying AI to operational workflows (log analysis, alert summarization, runbook assistance, RCA, remediation) with evaluation of accuracy and safety.
- Experience operating high-scale Kubernetes platforms, or distributed systems internals (scheduling, consistency, failure recovery).
- Experience leading reliability or platform initiatives that span multiple teams.
- Experience strengthening reliability governance through engineering (compliance-as-code, automated audit evidence, risk assessment).
- Language
- Japanese: Independent (CEFR â C1)
- OR English: Independent (CEFR â C1)
For details about CEFR, see here.
ã
Learn More About Mercari Group
- Careers site: https://careers.mercari.com/en/
- Mercan: https://mercan.mercari.com/en/
- Social media: X / Linkedin
- SREcon26 Americas - It's Not Always the Network (But Here's How to Prove It): Kubernetes Packet Capture for SREs
- ã¢ãŒããã¯ãã£Conference 2025 - SREèŠç¹ã§æ¯ãè¿ãã¡ã«ã«ãªã®ã¢ãŒããã¯ãã£å€é·ãšæ®éçãªèã
Recruiting at Mercari
At Mercari Group, we value empathizing with and embodying the mission and values ââof 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.
ãLearn more about our recruiting process here.
ã
Equal Opportunity Hiring
Here at Mercari, we work to realize a world in which no oneâs 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.
Software Engineer (Site reliability) - Mercari
- éçšåœ¢æ ïŒã æ£ç€Ÿå¡
- åãæ¹ïŒ ãã¬ãã¯ã¹ã¿ã€ã å¶ïŒã³ã¢ã¿ã€ã ãªãã»ãã¬ãã·ãã«ã¿ã€ã ãªãïŒ
- å€åå°ïŒ å æ¬æš
詳现ã¯ãã£ãªã¢ãµã€ãã®åéèŠé ããã確èªãã ãã
ã
ã¡ã«ã«ãªã°ã«ãŒãã«ã€ããŠ
ãããã䟡å€ã埪ç°ããããããã人ã®å¯èœæ§ãåºãã
ãå°çè³æºãéãããŠãããªããããè±ããªç€ŸäŒãã€ããããã«äœãã§ããããã2013幎ã嵿¥è ã®å±±ç°é²å€ªéãäžçäžåšã®æ ã§æ±ããèª²é¡æèãããããªãã¢ããªãã¡ã«ã«ãªãã¯çãŸããŸãããç§ãã¡ã¯ãç©ççãªã¢ãããéã«éãããããã䟡å€ã埪ç°ãããããšã§ã誰ããããããããšãå®çŸãã人ã瀟äŒã«è²¢ç®ããããã®éžæè¢ãå¢ããããšãã§ãããšä¿¡ããŠããŸãã
ãã¯ãããžãŒã®åã§äžçäžã®äººã ãã€ãªãããããã人ã®å¯èœæ§ãçºæ®ãããäžçãå®çŸããŠãããŸããã¡ã«ã«ãªã°ã«ãŒãã®ç®æãã¹ãæ¹éã«ã€ããŠã¯ Mercari Culture Doc ãã芧ãã ããã
ã
çµç¹ã»ããŒã ã®ããã·ã§ã³
- Mercari Engineering Principles
Mercari Engineering Principles ã¯ãã¡ã«ã«ãªã®ãšã³ãžãã¢ãªã³ã°çµç¹ã«ããã信念ãè¡åã®åºç€ãšãªãå ±éèªèãææåãããã®ã§ãã¡ã«ã«ãªã®ã¡ã³ããŒå šå¡ãå ±æããMissionãValueãCultureããšã³ãžãã¢ãªã³ã°ã®èŠç¹ããè£å®ãããã®ãšãªããŸãããããã®Principlesã¯ãç§ãã¡ãé·æçã«å®çŸããããšããçæ³çãªå§¿ãå®çŸ©ããããšã§ãæçµçã«ã¡ã«ã«ãªã®ããã·ã§ã³ãéæããããã«æŽ»çšããŠãããŸãã
- Passion For The Product
- Grow Together
- Solve Through Mechanisms
- Collaborate Openly
詳现ã«ã€ããŠã¯ãšã³ãžãã¢ãªã³ã°ã«ã«ãã£ãŒ ãã芧ãã ãã
ã
SREããŒã ã¯ãMercariãMerpayãMercoinãå«ãMercari Groupã®æ¬çªãµãŒãã¹ã«ãããŠãä¿¡é Œæ§ãã¹ã±ãŒã©ããªãã£ãéçšå質ã®åäžããªãŒãããããŒã ã§ããã·ã¹ãã ããµãŒãã¹åäœã ãã§ãªããã客ããŸã®äœéšãèµ·ç¹ãšããä¿¡é Œæ§ãéèŠããCUJ SLOãæŽ»çšããŠéèŠãªäœéšã芳枬å¯èœã«ããªãããç¶ç¶çãªãµãŒãã¹æ¹åã«ã€ãªããŠããŸããGoogle CloudãKubernetesãã¯ãããšããã¯ã©ãŠããã€ãã£ããªåºç€äžã§éçšãããå€§èŠæš¡ãªã·ã¹ãã ã«åãåããã€ã³ã·ãã³ã察å¿ã®é«åºŠåããã€ã«åæžãã¬ãžãªãšã³ããªã·ã¹ãã èšèšã»éçšãæšé²ããŠããŸããããã«ãAIã«ãã£ãŠéçºã¹ããŒããå éããäžã§ãã¬ãŒãã¬ãŒã«ã®æŽåãAI AgentãæŽ»çšãã調æ»ã»å¯Ÿå¿ããã»ã¹ã®é«åºŠåãããŒã 暪æã®ã³ã©ãã¬ãŒã·ã§ã³ãéããŠãã€ã³ã·ãã³ãã®æªç¶é²æ¢ãšè¿ éãªåŸ©æ§ãæ¯ããŠããŸãã
ã
æ¥åå
容
- SLOã«åºã¥ããGoogle Cloudäžã§çšŒåããæ°çŸèŠæš¡ã®æ¬çªãã€ã¯ããµãŒãã¹ãéçšããç·æ¥æã®ãªã³ã³ãŒã«å¯Ÿå¿ãéçšãµããŒããæ ãã
- ä¿¡é Œæ§åäžã«åããåãçµã¿ããèšèšãç£èŠããªãªãŒã¹ããªãªãŒã¹åŸã®æ¹åãŸã§äžè²«ããŠãªãŒãããã
- éèŠãªãŠãŒã¶ãŒãžã£ãŒããŒã«å¯ŸããSLI/SLOãå®çŸ©ã»éçšãããšã©ãŒããžã§ãããæŽ»çšããŠãããã¯ãããŒã ãšã®åªå é äœä»ããè¡ãã
- ã€ã³ã·ãã³ã察å¿ããªãŒããããã¹ãã¢ãŒãã æåãçºå±ãããåçºé²æ¢ã«ã€ãªãããã©ããŒã¢ãããæšé²ããã
- ãã°åæãã¢ã©ãŒãèŠçŽãæ ¹æ¬åå åæã埩æ§å¯Ÿå¿ããªã©ã察象ã«ãæç¢ºãªå®å šæ§ãæ ä¿ããAI Agentãæ§ç¯ããã
- Terraformã«ããInfrastructure as Codeãå®è·µããå€§èŠæš¡ãªãã€ã¯ããµãŒãã¹ç°å¢ã«ãããéçšã®ã¹ã±ãŒã©ããªãã£åäžããã€ã«åæžã®ããã®èªååã宿œããã
- ã客ããŸã®åœ±é¿ã«çŽã¥ããç£èŠãã¢ã©ãŒãããªãã¶ãŒãããªãã£ãæ§ç¯ã»ç¶æããæ€ç¥ããç·©åãŸã§ã®æéãççž®ããã
- æ¬çªç°å¢ã§çšŒåãããµãŒãã¹ã«å¯ŸããŠãå©çšå¢å ãé害çºçãèŠæ®ãããªãœãŒã¹èšèšããªãŒãã¹ã±ãŒã«ãäŸåå ãµãŒãã¹ãžã®ã¬ãžãªãšã³ã¹åŒ·åãªã©ãéããŠãä¿¡é Œæ§ãšæ§èœãç¶ç¶çã«æ¹åããã
- ãããã¯ãããŒã ããã³ãã©ãããã©ãŒã ããŒã ãšé£æºããæ°æ©èœãæ°èŠãµãŒãã¹ãå®å šã«æ¬çªæå ¥ããããã®æºåãéçšèšèšãæ°ãããã©ãããã©ãŒã æŽåãæšé²ããã
- ãªã¹ã¯è©äŸ¡ãç£æ»å¯Ÿå¿ãéçšã«ãŒã«ã®ã³ãŒãåã»èªåæ€èšŒãéããŠãå®å šã§ä¿¡é Œæ§ã®é«ãæ¬çªç°å¢ãç¶ç¶çã«ç¶æã»æ¹åããã
ã
ãŠããŒã¯ãªãã£ã¬ã³ãž
- MarketplaceãšFintechãå«ãMercari Groupã®å¹ åºãäºæ¥é åã«ãããŠãCUJ SLOãéããŠã客ããŸãžã®åœ±é¿ãå¯èŠåãããããã¯ã倿ãéçšæ¹éã«åæ ããªãããä¿¡é Œæ§åäžã«åãçµã¿ãŸãã
- AIã«ãã£ãŠéçºã¹ããŒããå éããäžã§ããšã³ãžãã¢ãšAI Agentãååããæ°ããéçšã®ããæ¹ãã€ãããããããã®SREæåã圢ã¥ãããŸãã
- ä¿¡é Œæ§ãšã¬ãžãªãšã³ã¹ã®éèŠæ§ãçµç¹å šäœã§çè§£ãããŠããç°å¢ã§ããããã¯ãããŒã ããã©ãããã©ãŒã ããŒã ãšé£æºããããŒã¿ã«åºã¥ãæ¹åãç¶ç¶çã«é²ããããŸãã
- éçšãµããŒããåãåãã察å¿ãã€ã³ã·ãã³ã察å¿ãªã©ã®æ¥ã ã®éçšæ¥åãšãä¿¡é Œæ§åäžã«åããäžé·æã®ãããžã§ã¯ãæšé²ã®äž¡æ¹ã«åãçµã¿ãŸãã
- ããŒã å å€ã§æ¥æ¬èªãšè±èªãæ¥åžžçã«äœ¿ãç°å¢ã§åããŸãã
ã
å¿åèŠä»¶
- æ±ããçµéšã»ã¹ãã«
- ãµãŒãã¹ã®ä¿¡é Œæ§ã«è²¬ä»»ãæã¡ãå¯çšæ§ç®æšã®éæããã€ã«åæžãæ¬çªçšŒåã«åããæºåãæšé²ããçµéšãSLI/SLOãæŽ»çšããéçºããŒã ãšé£æºããªããä¿¡é Œæ§åäžã®åªå é äœã倿ããçµéšãå«ãã
- SLOã«åºã¥ããå€§èŠæš¡ãªãµãŒãã¹ïŒ10K QPS以äžããŸãã¯è€æ°ã®æ¬çªãã€ã¯ããµãŒãã¹ïŒãéçšããçµéšã
- Google Cloudãªã©ã®ã¯ã©ãŠããµãŒãã¹ããã³Kubernetesäžã§çšŒåããã¯ãŒã¯ããŒãã®æ¬çªéçšçµéšã
- Infrastructure as Codeã®å®è·µãSREæ¥ååãããŒã«ã®éçºãéããŠãéçšã®å¹çåã»èªååãæšé²ããçµéšã
- DatadogãŸãã¯åçã®ããŒã«ãçšããç£èŠã»ãªãã¶ãŒãããªãã£åŒ·åã®å®åçµéšãã¢ã©ãŒãèšèšãç²åŽã®è»œæžã«åãçµãã çµéšãå«ãã
- ã€ã³ã·ãã³ã察å¿ããã¹ãã¢ãŒãã ããªã³ã³ãŒã«ãŸãã¯éçšãµããŒãã®åœçªå¶ãæ ã£ãçµéšã
- ä¿¡é Œæ§åäžã«åããåãçµã¿ããèšèšããå®è¡ãæ¹åãŸã§èªåŸçã«ãªãŒãã§ããã
- SREã®å°éé åã«éãããAIãéçšæ¥åã«åŠç¿ã»é©çšããŠããææ¬²ã
- æè¿ããçµéšã»ã¹ãã«
- è€æ°ã®ãµãŒãã¹ãŸãã¯äºæ¥é åããŸãããå šç€Ÿçã»æšªæçãªSLOããã°ã©ã ã®èšèšãŸãã¯éçšçµéšã
- ãã°åæãã¢ã©ãŒãèŠçŽãæ ¹æ¬åå åæã埩æ§å¯Ÿå¿ãªã©ã®éçšæ¥åã«AIãæŽ»çšããçµéšãããã³ãã®ç²ŸåºŠãå®å šæ§ãè©äŸ¡ããçµéšã
- å€§èŠæš¡ãªKubernetesåºç€ã®éçšçµéšããŸãã¯åæ£ã·ã¹ãã ã®å éšåäœã«é¢ããç¥èã»çµéšã
- è€æ°ããŒã ã«ãŸãããä¿¡é Œæ§åäžãŸãã¯ãã©ãããã©ãŒã æ¹åã®åãçµã¿ããªãŒãããçµéšã
- ãªã¹ã¯è©äŸ¡ãç£æ»èšŒè·¡ã®èªååéãã€ã³ãã©èšå®ãéçšã«ãŒã«ã®ã³ãŒãåã»èªåæ€èšŒãéããŠãæ¬çªç°å¢ã®å®å šæ§ãšä¿¡é Œæ§ãé«ããçµéšã
- èªåŠå
- æ¥æ¬èªïŒIndependent (CEFR â C1)
- OR è±èªïŒIndependent (CEFR â C1)
â»CEFRã®è©³çްã«ã€ããŠã¯ããã¡ããã芧ãã ãã
ã
ã¡ã«ã«ãªã°ã«ãŒãã«ã€ããŠç¥ãã
- ãã£ãªã¢ãµã€ã https://careers.mercari.com/
- ã¡ã«ã«ã³ïŒhttps://mercan.mercari.com/
- SNSïŒX / Linkedin
ã
éžèã«ã€ããŠ
ã¡ã«ã«ãªã°ã«ãŒãã§ã¯ã¡ã«ã«ãªã°ã«ãŒãããã³åã«ã³ãããŒã®ããã·ã§ã³ãšããªã¥ãŒãžã®å ±æã»äœçŸã倧åã«ããŠããŸããã¡ã³ããŒãçºæ®ãã䟡å€ã®ç·éãæå€§åããããããªçµç¹ã¥ãããæšé²ããããã«ãåè£è ã®ã¿ãªããã®çµéšãã¹ãã«ãããæ£ããçè§£ããããšèããŠããŸãã
éžèã®æµã
- æžé¡éžè
- æè¡èª²é¡ïŒãšã³ãžãã¢ããžã·ã§ã³ã§ã¯HackerRankãŸãã¯Githubã§ã®æè¡èª²é¡ãããšã³ãžãã¢ä»¥å€ã®ããžã·ã§ã³ã§ã¯æ¡çšããžã·ã§ã³ã«ãããŸãïŒé¢æ¥ã¿ã€ãã³ã°ãšååŸããããšããããŸãïŒ
- 颿¥ïŒããžã·ã§ã³ã«ãããè€æ°åã®é¢æ¥ããé¡ãããŸã
- ãªãã¡ã¬ã³ã¹ïŒãªã³ã©ã€ã³åç圢åŒã®ãã®ã§ãæçµéžèã®ååŸã§ãé¡ãããŸã
- ãªãã¡ãŒïŒæçµéžèãšãªãã¡ã¬ã³ã¹ã®å 容ããæ±ºå®ãããŸã
ã
ãâ»è©³ãã㯠ãã¡ãã®ããŒãžãã芧ãã ãã
ã
éžèã«ãããæ©äŒã®å¹³ç
ã¡ã«ã«ãªã§ã¯ãããã¯ã°ã©ãŠã³ãã«ãã£ãŠå人ã®å¯èœæ§ã決ãã€ããããããšãªããèªç±ã«äŸ¡å€ãçã¿ã ãæ©äŒãæã«ã§ãã瀟äŒã®å®çŸãç®æããŠããŸãããããŠã¡ã«ã«ãªãããã·ã§ã³ãå®çŸããããã«ãInclusion & Diversityããšããèãæ¹ã¯äžå¯æ¬ ãªååšã ãšèããŠããŸãã
æ¡çšæŽ»åã«ãããŠããã¡ã«ã«ãªã®ããã·ã§ã³ã»ããªã¥ãŒã«å ±æãããæ§ã ãªããã¯ã°ã©ãŠã³ãã®æ¹ã«ãžã§ã€ã³ããŠããã ãããããå¹Žéœ¢ãæ§å¥ãæ§çæåã人皮ã宿ã身äœèœåããã®ä»èšå·ã«åºã¥ãããããå·®å¥ããªããããšãçŽæããŸãã
詳ããã¯ãI&D statementãã芧ãã ããã
ãªãããå¿åã®éã«ã¯ãã©ã€ãã·ãŒããªã·ãŒãã確èªãã ããã