Junior Full Stack SaaS Engineer

About the Role

We are looking for a highly motivated Junior Full Stack SaaS Engineer to architect, build, and scale modern SaaS platforms from the ground up.
This role is for someone who has hands-on experience building complete SaaS products—not just isolated frontend or backend features. The ideal candidate understands how to design and ship scalable, production-grade applications across the full stack, including:

frontend systems,
backend APIs,
databases,
authentication,
billing,
infrastructure,
deployment pipelines,
and multi-tenant SaaS architecture.

You will work closely with product, design, AI, and infrastructure teams to build reliable and scalable software products used in production environments.

Responsibilities

Full Stack Product Development Design and develop end-to-end SaaS applications from scratch
Build responsive and scalable frontend applications
Develop secure backend APIs and microservices
Implement authentication, authorization, RBAC, and user management systems
Build billing, subscription, and usage-based systems
Develop dashboards, admin panels, and workflow management systems
Backend & API Engineering Design scalable backend architecture and APIs
Build high-performance REST and/or GraphQL services
Implement asynchronous systems, queues, caching, and background jobs
Optimize application performance, reliability, and scalability
Integrate third-party APIs and services
Database Engineering Design and manage scalable database systems
Work extensively with:
PostgreSQL
MongoDB
MySQL
SQL-based systems
Design schemas, indexing strategies, query optimization, and data models




Build systems for high availability, backups, migrations, and scaling
Infrastructure & Deployment Deploy and manage applications across cloud environments
Work with:
Docker
CI/CD pipelines
cloud infrastructure
containerized deployments
Build scalable production environments with monitoring and observability
Collaborate with DevOps and infrastructure teams on deployment strategies
Engineering & Product Ownership Write clean, maintainable, and production-grade code
Participate in architecture and technical design discussions
Write technical documentation and implementation plans
Review code and maintain engineering best practices
Collaborate cross-functionally to ship features quickly and reliably

Requirements

Must-Have Strong hands-on experience building SaaS platforms or full-stack applications
Strong full stack engineering experience across frontend and backend systems
Strong experience with databases including PostgreSQL, MongoDB, MySQL, and SQL systems
Experience with scalable multi-tenant SaaS architectures
Strong understanding of APIs, authentication systems, and application security
Experience deploying and maintaining production systems in cloud environments
Strong JavaScript/TypeScript and Python backend engineering skills




Preferred Experience with modern frontend frameworks such as React or Next.js
Experience with Node.js, Python, or Go backend systems
Familiarity with AI integrations and API-based AI products
Experience with Redis, queues, caching systems, and event-driven architectures
Familiarity with Kubernetes and distributed systems
Startup or high-growth product experience

What We’re Looking For Someone who has built real SaaS products used by customers
Strong product and systems-thinking mindset
Ability to move quickly while maintaining engineering quality
Ownership mentality with strong execution skills
Someone comfortable working across the full stack without heavy supervision
Must be a coder, not just a user or project manager

Compensation Market-competitive salary depending on experience and current verifiable (paychecks) compensation.
To apply, please include:
Relevant SaaS products or platforms built
GitHub, portfolio, or technical project links
Technologies and frameworks worked with
Brief description of systems you have architected or scaled

Company Description Headquartered in McLean, Virginia, USA, Qubrid is a global provider of Artificial Intelligence (AI), Data Center and IoT products, solutions, and services. As pioneers in the realm of advanced computing technologies, we pride ourselves on being at the forefront of innovation, empowering businesses with the transformative capabilities of GPUs, Artificial Intelligence, Quantum Computing, IoT and more. We specialize in offering a wide array of hardware and software solutions for industries such as healthcare, manufacturing, finance, government, education and more.

📌 Junior Full Stack Engineer (Hands-On Coder) - WFH (Kolkata)
🏢 Qubrid AI
📍 Kolkata