Backend Engineer

About Us

At Sales Marker, our mission is to create a world where all people and companies can challenge themselves beyond existing boundaries. We are one of the fastest-growing startups in Japan—scaling at more than twice the pace of typical unicorns. Our flagship product, Sales Marker, empowers sales teams to achieve 3 times greater efficiency. In just two years since launch, we’ve achieved 2,000% growth, and today our year-over-year business growth stands at 270%—and this is only the beginning.

Backed by strong financial growth, we’re expanding into a bold portfolio of new products, empowering businesses to grow from every angle: Sales, Marketing, Recruiting, AI agents and so on.

 

The Team

Our co-founders come from leading global companies and were recognized on the Forbes 30 Under 30 Asia List (2023).

Our Product & Engineering team is proudly global, with members from 24+ countries and backgrounds at top tech companies such as Google, Microsoft, Indeed, Mercari, LINE, Yahoo, and SmartNews etc.

At Sales Marker, you’ll join a global, ambitious, and fast-moving team where your ideas truly shape the future. We’re building an engineering culture around:

• Customer Obsession – solving real problems and exceeding expectations
• Ownership – taking responsibility end to end, across roles and functions
• 10x – aiming for bold impact, moving fast, and disrupting old standards

 

The Role

Sales Marker is actively hiring multiple Back End Engineers across our product zones. In this role, you will contribute the backend, playing a key part in our development efforts. We’re looking for individuals with strong technical foundations who thrive in a startup environment.

We are hiring for roles at various experience levels, from junior to senior engineers, and welcome candidates who are eager to grow, take ownership, and make a meaningful impact.

 

What We're Looking For

Required

• Deep understanding of Data Structures, Algorithms and CS fundamentals
• 1+ year of experience in Web Application Development
• 1+ years of experience with React.js, TypeScript
• 1+ years of development experience on in-house product
• Conversational level of English, with Japanese language abilities being a plus

Nice to Haves

• Experience with Next.js
• Experience with Node.js, express
• Business level Japanese is a plus

 

Our Tech Stack

Front-end

• TypeScript, React, NextJS;
• Testing: Storybook, jest, playwright;
• Hosting: Amplify;
• Feature flag: Unleash;

Server Side/Back-End

• Infrastructure: AWS, EKS, ElasticBeanstalk;
• DB: Aurora, ElasticSearch, Redis;
• Languages: Go, Typescript;
• Analysis environment: Athena, Superset;
• Monitoring: DataDog;
• Others: AWS Lambda, AWS Batch, AWS API Gateway, AWS Glue, AWS S3;

 

Why Us?

• One of the fastest-growing SaaS startups in Japan with exceptional financial growth
• Opportunities to build new products from scratch and drive innovation
• Clear career development and leadership opportunities
• Flexible working hours and hybrid working style (remote work is possible)
• Highly diverse, global team with English as a working language
• Attractive perks: Resort Worx, free weekly lunch, book purchasing support, offsites, and more

 

Working Style

Hybrid Work

• We follow a hybrid work style, combining both office and remote work. Recommended in-office days vary by role. Even when working remotely, we maintain smooth collaboration and communication through tools like Zoom, Google Meet, and Gather.

Flex Work

• You can customize your working hours to suit your day. For business and client-facing teams, schedules are often arranged around client meetings.

Global Environment

• With team members from over 20 countries, we bring together diverse perspectives and ideas, driving projects forward across languages and cultures in an environment where English and Japanese blend naturally into daily communication.