
We are looking for a MERN Stack Developer with 2+ years of real-world experience who thinks beyond CRUD APIs and UI screens. This role is for someone who understands how full-stack systems are designed, cares about scalability, performance, security, and clean architecture, and takes ownership of features end-to-end.
We value ownership, speed, clean code, and smart problem-solving. If you enjoy building products from scratch, thinking in systems, and shipping meaningful features—not just “finishing tasks”—this role is for you.
🧠 Key Responsibilities
- Design, develop, and maintain full-stack applications using MongoDB, Express, React, and Node.js
- Build scalable and maintainable backend APIs with proper validation, error handling, and security
- Develop clean, reusable, and performant React components
- Design database schemas and optimize queries for performance and scalability
- Translate product and business requirements into solid technical solutions
- Design frontend and backend architecture that can scale as the product grows
- Handle authentication, authorization, roles, and permissions
- Work with async operations, background jobs, and API integrations
- Manage application state properly (React state, context, or state libraries)
- Handle edge cases: loading, failure states, retries, and fallbacks
- Write clean, readable, and well-structured JavaScript / TypeScript code
- Follow and continuously improve coding standards and best practices
- Debug production issues using logs, reasoning, and root-cause analysis
- Review PRs, give constructive feedback, and contribute to team learning
- Work with designers to deliver good UX, not just “working UI”
- Collaborate closely with QA, design, and product teams
- Think ahead—identify technical debt, performance bottlenecks, and improvement areas
- Use AI tools responsibly to speed up development, debugging, and learning (with understanding)
✅ Qualifications Must Have
- 2+ years of hands-on experience with the MERN stack
- Strong knowledge of JavaScript and TypeScript, including OOP concepts
- Solid experience with Node.js & Express
- Hands-on experience with MongoDB, schema design, indexing, and aggregation
- Experience building and consuming REST APIs
- Strong understanding of async/await, promises, event loop
- Knowledge of HTML, CSS, responsive design (Tailwind / Bootstrap preferred)
- Experience with React hooks, component lifecycle, and state management
- Use React performance optimizations such as: React.memo useCallback, useMemo
- Implement code splitting and lazy loading using dynamic imports
- Work on or understand micro-frontend architecture and module federation
- Experience handling authentication (JWT, sessions, OAuth)
- Familiarity with Git, code reviews, and basic CI/CD concepts
- Exposure to real production issues (performance, bugs, scaling, failures, debugging)
Good to Have (Big Plus)
- Knowledge of Next.js or server-side rendering concepts
- Experience with Redis, queues (kafka, rabbitmq), or background jobs
- Experience with Docker, cloud deployments, or Nginx
- Understanding of performance tuning and lazy loading
- Experience working in a startup or fast-paced environment
❌ Who Should Not Apply
Please do not apply if:
- You only focus on “closing tickets” without questioning why something is being built
- You lack strong JavaScript fundamentals (arrays, objects, async/await, promises, event loop)
- You mostly copy-paste code without understanding it
- You never think about edge cases, failures, retries, or resilience
- You depend heavily on others for architecture or technical direction
- You avoid responsibility and say things like:
- “Frontend issue”
- “Backend issue”
- “It was already like this”
- “QA didn’t catch it”
- You are not comfortable explaining your code, decisions, or design choices
- You expect exact step-by-step instructions for every task
- You are not interested in learning and improving as a full-stack engineer
👉 This role is not for task executors.
We want problem solvers, thinkers and owners.

About Saeculum Solutions Pvt Ltd
About
Saeculum Solutions Pvt Ltd is an emerging company and is always looking to hire fresh enthusiastic talents to join our growing team. We believe in delivering the best services to our clients and therefore we only hire talents who are all-rounders and who say “All-is-Well” to all projects. So, if you share the same passion and vision, join our team today..!
Tech stack
Candid answers by the company
- Web Application Development
- Mobile Application Development
- Hire Dedicated Developers
- Front-end Development
- SaaS Product Development
- UI / UX Design
- CMS Development
- QA & Software Testing
Photos
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JD-
Job Title: Full Stack Developer (ASP.NET & MySQL)
Experience Required: 3 to 5 Years
Location: Kalina, Mumbai (Onsite)
Employment Type: Full-Time
About the Role:
We are looking for a skilled and proactive Full Stack Developer with 3 to 5 years of hands-on experience in ASP.NET and MySQL to join our dynamic team in Kalina, Mumbai. This is a fully onsite role, ideal for professionals who enjoy working in a collaborative office environment and are passionate about building scalable web applications.
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- Develop and manage MySQL databases, including design, optimization, and complex queries.
- Collaborate with UI/UX designers, front-end developers, and other stakeholders to deliver seamless user experiences.
Required Skills & Qualifications:
- 3 to 5 years of experience in full stack development.
- Strong proficiency in ASP.NET (MVC, Web API) and C#.
- Solid experience with MySQL database design, queries, and optimization.
- Good understanding of front-end technologies such as HTML, CSS, JavaScript, and jQuery.
- Familiarity with version control tools like Git.
Good to Have (Preferred):
- Experience with front-end frameworks (e.g., Angular, React).
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- Understanding of Agile methodologies.
Location & Work Mode:
- Location: Kalina, Mumbai
- Work Mode: Onsite (Work from Office)
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Work Location: Bangalore, Chennai, Mysore
Experience: 5+ Years
Budget: up to 18 Lakhs
Notice Period: Immediate to 30 days
Mandatory Skills: Java, Java Script, HTML, CSS
Job Description:
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· Working knowledge with Oracle, Mongo DB databases.
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Applications.
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Synapsica is a growth stage HealthTech startup founded by alumni from IIT Kharagpur, AIIMS New Delhi, and IIM Ahmedabad. We believe healthcare needs to be transparent and objective, while being affordable. Every patient has the right to know exactly what is happening in their bodies and they don’t have to rely on cryptic 2 liners given to them as diagnosis.
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We are backed by Y Combinator and other investors from India, US and Japan. We are proud to have GE, AIIMS, the Spinal Kinetics as our partners.
Join us, if you find this as exciting as we do!
Description:
We are looking for a skilled computer programmer who is comfortable with both front and back end programming. Hands-on with UI and server-side is highly desirable.
You will get hands-on experience in the latest technologies and skills like ReactJS, NodeJS, MongoDB, REST API etc. This role is ideal for you if you have a background in Full Stack development and are looking for the next level of career growth in a fast paced, learning based and merit driven work environment.
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- Owning and delivering end-to-end products, features, enhancements.
Requirements:
- Degree in Computer Science or related discipline with 3-7 years of experience.
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- Hands on with Reactjs or similar framework/library.
- Proficiency with server side languages such as Nodejs, Python, PHP.
- Prior experience with at least one no-sql database such as MongoDB.
- Excellent verbal communication skills.
- Good problem solving skills.
- Attention to detail.
- Very high sense of ownership.
- Deep interest and passion for technology
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