Senior Backend Engineer

About JOSYS
Josys, a dynamic B2B SaaS platform startup, has embarked on a mission to revolutionize IT operations globally, following an exceptional launch in Japan and securing $218 million in Series A and B funding. Our platform enables businesses to conquer the complexities of work-from-anywhere setups, rapid digital transformation, and the proliferation of SaaS applications by simplifying, optimizing, and securing their IT operations.
With a presence in 9 countries, including Japan, India, and the USA, our cutting-edge product technology center is located in Bengaluru, India. As we continue our rapid expansion, we aim to double our full-time employee headcount in 2024, enhancing our capacity to innovate and deliver.
Josys was spun off from RAKSUL, a celebrated Japanese unicorn and Forbes Startup of the Year 2018, which is a transformation through three pioneering B2B e-commerce platforms.

Our Technology Stack:
Node.JS, Ruby on Rails, MySQL, Postgresql, DocumentDB, JavaScript/Typescript, React.JS, NextJS, MFA, Webpack, Cucumber and Elasticsearch.

Technologies:
MERN stack, microservices, containers/orchestration, HTML/CSS, JavaScript, Node.js, Express, React.js, cloud APIs, Ruby, Rails, MySQL/ Postgres/ MongoDB.
We are seeking a highly motivated B2B SaaS Backend Engineer with startup experience, specializing in the MERN (MongoDB, Express.js, React.js, Node.js) stack. In addition to expertise in the MERN stack, the ideal candidate should have experience working with cloud-based infrastructure, preferably AWS services, and a strong ability to develop highly scalable and secure systems. Familiarity with Agile methodologies is also crucial as you will be working in an Agile development environment. As a Backend Software Engineer, you will play a vital role in the design, development, and maintenance of the back-end components of our B2B SaaS product. You will work closely with a team of experienced engineers, product managers, and designers to deliver high-quality software solutions that meet our customers' needs. This is an excellent opportunity to grow your skills and contribute to the success of a fast-paced startup.

Key Responsibilities:
• Collaborate with development team, product managers, and designers to understand business requirements and contribute to technical specifications and software solutions.
• Assist in designing, developing, testing, and deploying back-end components of web applications using the MERN stack.
• Work with front-end engineers to develop APIs that facilitate smooth data flow and system interoperability.
• Optimize code, conduct testing, and following best practices to ensure the reliability, performance, and security of the application.
• Learn and contribute to the development and maintenance of cloud-based infrastructure, preferably using AWS services, ensuring scalability, high availability, and disaster recovery.
• Collaborate with cross-functional teams to ensure successful product launches and provide support when needed.
• Participate actively in Agile development practices, including sprint planning, stand-ups, and retrospectives.
• Contribute to the refinement of user stories, provide effort estimations, and prioritize tasks to ensure timely delivery.
• Participate in code reviews to maintain code quality, receive constructive feedback, and adhere to best practices.
• Stay updated with industry trends and emerging technologies, evaluating their potential benefits for the product and the development team.
• Actively contribute to continuous improvement initiatives by suggesting process enhancements and implementing approved changes

Requirements / Qualifications:
• Software coding craftsmanship and hands-on coder. 2+ years of experience in hard-core software product development. Experience with product companies is an important requirement.
• Strong computer science fundamentals.
• Hands-on backend web development experience. Strong understanding of back-end
technologies such as Node.js and Express.js.
• Experience with Ruby on Rails would be a plus
• Familiarity with front-end technologies such as HTML, CSS, and JavaScript is a plus.
• Exposure to MongoDB or other NoSQL databases is advantageous.
• Exposure to cloud-based infrastructure, preferably AWS services, and a strong desire to
learn about scalable and secure system development.
• Proficiency in version control systems (e.g., Git) and experience with CI/CD pipelines.
• Strong inclination for end-to-end product ownership.
• Have a penchant for high-quality and timely product delivery
• Knowledge of Agile methodologies and a willingness to work in an Agile development
environment.
• Strong problem-solving and analytical skills, with a passion for writing clean, efficient, and maintainable code.
• Undaunted by ambiguity and ability to solve complex problems.
• Strong interest in exploring emerging tech to enable business growth.
• Experience working on B2B SaaS products would be highly valuable.
• Understands and works towards customer delight and comprehensive customer
experience.
• Excellent verbal and written communication skills and influencing skills.
• Engineering degree in Computer Science or a related field

AI & Productivity Mindset:
Must be AI tech-savvy — actively using AI tools to improve productivity, write better code, and automate workflows.

• Hands-on experience or regular use of tools like Cursor, Windsurf, GitHub Copilot, or similar is highly valued.

• Proactive in leveraging emerging technologies (including AI) to drive faster, smarter development and solve real product challenges.