
Sr Backend Engineer
at Hiring for a Crypto based company
You have 5 years or more of Backend end development experience with expertise in designing and implementing high-performance applications.
Worked with and built high-performance products using Node Js/GoLang/ Python and have seen the product evolution cycle from PoC to Production
You have a deep understanding of design principles and can rightly judge/implement solutions to complex problems
You are capable of writing high-quality code that conforms to the standards and best practices in a particular language/framework.
You have experience building a product using a mainstream library or framework.
You love to own end to end responsibility, starting from defining the problem statement (either yourself or alongside your peers), development (PoC if needed), testing, releasing in staging & then production environment, and finally monitoring.
Previous work experience in product-based startups
Experience building for products that have scaled and have seen the product evolution
Understands the cryptocurrency landscapeOffers the best CTC in the market

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We are looking for a skilled Node.js Developer with PHP experience to build, enhance, and maintain ERP and EdTech platforms. The role involves developing scalable backend services, integrating ERP modules, and supporting education-focused systems such as LMS, student management, exams, and fee management.
Key Responsibilities
Develop and maintain backend services using Node.js and PHP.
Build and integrate ERP modules for EdTech platforms (Admissions, Students, Exams, Attendance, Fees, Reports).
Design and consume RESTful APIs and third-party integrations (payment gateway, SMS, email).
Work with databases (MySQL / MongoDB / PostgreSQL) for high-volume education data.
Optimize application performance, scalability, and security.
Collaborate with frontend, QA, and product teams.
Debug, troubleshoot, and provide production support.
Required Skills
Strong experience in Node.js (Express.js / NestJS).
Working experience in PHP (Core PHP / Laravel / CodeIgniter).
Hands-on experience with ERP systems.
Domain experience in EdTech / Education ERP / LMS.
Strong knowledge of MySQL and database design.
Experience with authentication, role-based access, and reporting.
Familiarity with Git, APIs, and server environments.
Preferred Skills
Experience with online examination systems.
Knowledge of cloud platforms (AWS / Azure).
Understanding of security best practices (CSRF, XSS, SQL Injection).
Exposure to microservices or modular architecture.
Qualification
Bachelor’s degree in Computer Science or equivalent experience.
3–6 years of relevant experience in Node.js & PHP development
What you’ll do here:
•Lead the technical implementation of our platform using Python for new and existing clients
•Collaborate with internal teams to deliver seamless onboarding experiences for our clients.
•Translate business use-cases into scalable, secure, and maintainable technical solutions
•Own the technical relationship with clients, acting as a trusted advisor throughout the implementation lifecycle
•Conduct code reviews, enforce best practices, and ensure high-quality deliverables
•Mentor developers and contribute to internal tooling and automation
•Troubleshoot and resolve complex integration issues across cloud environments
What you will need to thrive:
•8+ years of software development experience.
•Strong proficiency in Python (preferred), C# .NET, or C/C++.
•Proven track record of leading technical implementations for enterprise clients.
•Deep understanding of Pandas, Numpy, RESTful APIs, webhooks, and data transformation pipelines.
•Excellent communication and stakeholder management skills.
Requirements
- Design and implement a full-stack web application using Python Django framework and ReactJS.
- 1+ years of experience in building and deploying web applications.
- Experience in designing and using RESTful APIs.
- Basic knowledge in front-end technologies such as JavaScript, , ReactJS, HTML5, and CSS3.
- Understanding of fundamental design principles behind a scalable application.
- Understanding of databases, SQL and non-relational, plus the Django ORM.
- Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model.
- Experience in web mark-up like HTML and CSS.
- Experience with data structure libraries.
- Familiarity with RESTful APIs.
- A knack for bench marking and optimization.
- Knowledge of modern authorization mechanisms, such as JSON Web Token.
- Familiarity with modern front-end build pipelines and tools.
- Experience with common front-end development tools such as NPM etc.
- Strong knowledge of Git version control.
- Experience deploying Python applications into production.
- Amazon Web Services (AWS) knowledge is a plus.
Responsibilities
- Writing reusable, testable, and efficient code.
- Design and implementation of low-latency, high-availability, and performance applications using Django framework in Python.
- Create and use the REST APIs for communicating with other apps.
- Assess and prioritize feature requests and work in Agile framework.
- Implementation of security and data protection algorithms.
- Integration of data storage solutions like databases, key-value stores, blob stores, S3 etc.
- Improve the functionality of existing systems and applications.
- High commitment to work and taking ownership of deliverables.
- Help to research and influence our path forward with strategic technology initiatives.
Responsibilities :
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Work with development teams and product managers to ideate software solutions
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Maintenance of Node.js Backend
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Working with MongoDB to create various features
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Troubleshoot, debug and upgrade software
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Create security and data protection settings
Requirements :
-
Proven experience as a backend developer in Node.js or similar role
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Experience developing desktop and mobile applications
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Familiarity with common stacks
Requirements :
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Hands on experience building end to end systems
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Minimum 1 yrs of experience with Javascript, Node.js and Mongo.DB
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Good architectural & design skills
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Strong coding, data structures and algorithms
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The ability to own end to end responsibility - right from requirement to release
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The ability to produce bug-free and production grade code
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Experience and fine understanding of cross browser front end development issues
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Exhibit a deep understanding of server virtualization, networking and storage ensuring that
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The solution scales and performs with high availability and uptime
Have an experience building backend server side applications in Node.js and Express.js Have in-depth knowledge and experience of using ES6+ features and Object Oriented Principles Have sound knowledge and are familiar with databases like MongoDb - (Preferred) and Mysql. Have good exposure to cloud native technologies (AWS Lambda, S3, RDS, etc) Have working knowledge of version control (Git) and continuous deployment Have experience in optimising backend API’s and database queries for optimal performance. You are good at problem solving and have analytical skills You are flexible in adapting new technologies and frameworks as per the projects needs
The B2B manufacturing industry has a lack of digitisation globally. NowPurchase is building layers of technology to help improve the productivity and profits of the manufacturer. For this we are building the OS (Operating System) that will seamlessly connect factory equipment such as furnaces and spectrometers to our software systems that provide real time optimisations.
The end-game is to use this interconnected system to do great production planning and autonomous procurement of their raw materials. The Heart of NowPurchase will be a marketplace consisting of these smart factories and raw material suppliers.
Here a video that explains our product journey:
https://www.loom.com/share/ccd0ed9e7bc349d7bba851d762253c21">https://www.loom.com/share/ccd0ed9e7bc349d7bba851d762253c21
This is fully a remote role, but the employer needs to fly down to the office in Kolkata for 5–6 days every month. Plane tickets and accommodation will be reimbursed by the company.
Role Description
NowPurchase is looking to add an immensely talented Senior Backend Engineer that will help us invent, design, refine and deliver products that will meet the above vision.
- Expect to build a lot of services and APIs in the cloud and stand-alone IoT devices to serve both the browser as well as native IoT enabled terminals that will be placed at the manufacturers' premises.
- Expect designing algorithms that model the metallurgy of the manufacturing processes as well as using tools such as linear programming, machine learning etc.
- You need to lead the backend team to make sure they are delivering high quality code and is constantly inspired to experiment with tools to push out MVPs.
What are the expectations from this role?
- Deliver high quality modular code deployed to serve web, mobile and native IoT enabled terminals that leverage REST-based services and real time sockets. This would include algorithms for real time optimizations that are critical for the manufacturing process.
- You are empowered to work directly with leadership and the product team to make decisions about your code and future of the product.
- Have a strong emphasis on shipping features quickly without sacrificing code quality. Be ready to build a lot of MVPs that will go through iteration or be completely scrapped depending on the outcome at the customer end.
- Own your Agile projects and lead the team from software design to implementation and deployment. Maintain sprints, delivery timelines and contribute to better managing the engineering team.
- Collaborate on the end to end design and implementation of the platform, including data modeling, systems architecture, data security, access controls, architecture, user experience, deployment, automation, and monitoring.
- Maintain a high level of data integrity, quality and security checks.
- Develop data pipelines and RESTful services that are distributed, robust and highly performant.
- Build a culture of simplicity and pragmatism, which is reflected in your elegant code that other developers emulate and you ensure through thorough code reviews and processes.
Qualifications and Experience
- 4+ years of demonstrated software engineering experience in an agile environment designing, architecting and implementing robust scalable systems preferably for modern SaaS application
- 1+ years of technical leadership experience
- Experience with modern server-side programming languages such as Python, Scala, Go. Experience with web frameworks such as Django Rest Framework, Flask.
- Experience with architecting asynchronous services with design patters leveraging PostgreSQL, MongoDB, Redis, Celery for storage and multi-tenant servers over AWS Elastic BeanStalk.
Compensation & Benefits
- **Cash Compensation:** As per industry standards & pedigree of candidate
- **ESOPs:** 10% of NowPurchase is dedicated to current & future team members. Your package would entail some ESOPs so that you own a part of the company and grow along with it.
- **Medical Insurance:** Benefits of group insurance of 3 lakhs for family including parents, spouse, children
- **Generous leave structure and WFHs** including Marriage, Maternity & Paternity leaves
- **Complete Relocation Expenses:** We are building a unicorn out of the city of Joy (Kolkata). We will pay for everything you spend to relocate here.
**Possible Growth path**
Senior Backend End Engineer > Engineering Manager > VP of Engineering
**Tech Stack**
- React/Redux
- Python/Django/Celery
- Git, AWS, ELB (Elastic Beanstalk), Netlify
- PostgreSQL/Redis/S3
## **Hiring Process**
1. Screening of applicants & initial telephonic call with Manager -HR
2. F2F/Video Interview with Engineering Manager and Cofounder CTO
3. Take home written assessment
4. F2F/Video Interview with Cofounder CEO
5. Email communication on final feedback
The end to end process shall take less than 10 days. We pride ourselves on being transparent & moving fast.
*Candidates who accept an offer may join within 1 hour, 1 week or up to 45days of signing - though, we have a preference for as short a gap period between signing and joining since we're at the most exciting part of our journey - laying the foundation for the NowPurchase platform!*
Responsibilities
- Writing scalable, robust,, testable, efficient, and easily maintainable code
- Translating software requirements into stable, working, high performance software
- Playing a key role in architectural and design decisions, building toward an efficient micro services distributed architecture
Skills
- Strong knowledge of Goprogramming language, paradigms, constructs, and idioms
- Knowledge of Goroutine and channel patterns
- Experience with the full suite of Goframeworks and tools, including:
- Dependency management tools such as Godep, Sltr, etc.
- Go’s templating language
- Go’s code generation tools, such as Stringer
- Popular Goweb frameworks, such as Revel,Gin
- Router packages, such as Gorilla Mux
- Ability to write clean and effective Godoc comments
- Familiarity with code versioning tools (such as Git, SVN, and Mercurial)
- Good Written and Verbal communications.










