[Remote] Sr. Software Engineer, Backend at Mercari

United States

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Not SpecifiedCompensation

Senior (5 to 8 years)Experience Level

Full TimeJob Type

UnknownVisa

E-commerce, Marketplace, TechnologyIndustries

Requirements

Bachelor's degree in Computer Science, Data Science, Engineering, or a related field (or equivalent experience)
At least 8 years of experience in backend development
Experience with large-scale distributed systems handling millions of users
Experience with microservices architecture and service mesh
Experience with performance optimization at scale, including database optimization and caching strategies
Experience with modern backend build tools and deployment strategies (Docker, Kubernetes, Terraform)
Expert knowledge of Go and PHP ecosystems
Deep understanding of backend performance optimization techniques
Strong architectural and system design skills
Excellent knowledge of Agentic AI tools and workflows
Excellent mentoring and technical leadership abilities

Responsibilities

Lead the development of complex backend features and services, such as payment processing and inventory management systems
Design and implement scalable backend architectures and patterns, including microservices and event-driven systems
Drive technical decisions and best practices for backend development, including coding standards, performance budgets, and testing strategies
Mentor and guide other engineers in backend development practices through code reviews and technical presentations
Collaborate with product and frontend teams to define technical requirements and feasibility of new features
Optimize backend performance and scalability, focusing on database optimization, caching strategies, and load balancing
Contribute to backend platform technology and strategic roadmap decisions, including technology evaluation and technical debt reduction
Lead technical discussions and architectural reviews for major features and system changes

Skills

Key technologies and capabilities for this role

GoPHPmicroservicesdistributed systemsbackend developmentpayment processinginventory managementevent-driven systemscode reviewsscalabilityperformance optimization

Questions & Answers

Common questions about this position

What are the key skills required for the Senior Software Engineer, Backend role?

The role requires deep expertise in Go and PHP, along with experience in large-scale distributed systems, microservices architecture, and performance optimization including database optimization and caching strategies.

What experience level is needed for this position?

At least 8 years of experience in backend development is required, plus experience with large-scale distributed systems handling millions of users.

What is the salary or compensation for this role?

This information is not specified in the job description.

Is this a remote position or does it require office work?

This information is not specified in the job description.

What does the company culture emphasize for engineers?

The culture emphasizes mentoring and collaborating in an open, respectful, flexible, and empathic manner, while building safe, secure systems with a focus on production quality deployment, monitoring, and reliability.

Mercari

E-commerce platform for second-hand goods

About Mercari

Mercari is an e-commerce platform that allows individuals to buy and sell second-hand goods. Users can list items for sale by taking photos, writing descriptions, and setting prices through a mobile app or website. Buyers can browse these listings, make purchases, and arrange shipping, while Mercari manages the transaction process, including payment and logistics. The company earns revenue by charging a selling fee based on the sale price and offers optional services like shipping labels to enhance seller visibility. Mercari differentiates itself from competitors like eBay and Poshmark by focusing on simplicity and ease of use, appealing particularly to younger, environmentally conscious consumers who value recycling and reusing products.

Tokyo, JapanHeadquarters

2013Year Founded

$113.4MTotal Funding

IPOCompany Stage

Consumer Software, Consumer GoodsIndustries

1,001-5,000Employees

Risks

Increased competition from direct resale platforms by brands like Dr. Martens and New Balance.

Zillennials' focus on price over brand loyalty may challenge user retention.

Oasis Management's increased stake could pressure Mercari to change its business model.

Differentiation

Mercari offers a user-friendly platform for buying and selling second-hand goods.

The company has expanded its operations from Japan to the United States.

Mercari's AI listing support streamlines the selling process for users.

Upsides

Mercari's first physical store in Los Angeles enhances brand presence and customer engagement.

Partnership with MoneyGram Haas F1 Team increases brand visibility among motorsport enthusiasts.

Expansion of Mercari x Japan attracts U.S. shoppers to exclusive Japanese products.

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