
Context for the Candidates:
Blockchain engineers are tasked with building secure, scalable, and high-performance decentralized applications. This discussion focuses on how to utilize key technologies—Node.js, Rust, Go, TypeScript, Ethers.js, viem, and Hardhat—in smart contract and blockchain system development, while addressing the practical challenges that arise in such projects.
Key Discussion Points:
• How do you integrate Node.js, Rust, Go, and TypeScript in blockchain-backed applications?
• Discuss the trade-offs between using Rust or Go for performance-critical blockchain services.
• What are the key challenges in ensuring the security and scalability of smart contracts using tools like Ethers.js, viem, and Hardhat?
• How do you approach testing, debugging, and deploying smart contracts in a decentralized environment?
• Share best practices for gas optimization, contract upgradability, and backend scalability.
Evaluation Criteria:
1. Technical Knowledge:
• Strong knowledge of Node.js, Rust, Go, and TypeScript with practical experience in blockchain development.
• Proficiency in Ethers.js, viem, Hardhat, and smart contract lifecycle (development, testing, deployment).
• Understanding of security best practices, performance optimizations, and scalability in decentralized systems.
2. Problem-Solving and Integration Skills:
• How candidates approach integrating smart contract solutions with backend services using Node.js, Rust, Go, and TypeScript.
• Solutions proposed for common challenges in blockchain projects such as gas fees, security vulnerabilities, and system bottlenecks.
3. Experience and Expertise:
• Minimum of 2 years of IT experience, including hands-on development with the specified technologies.
• Practical knowledge of blockchain architecture, consensus mechanisms, and decentralized application deployment.
4. Innovation and Critical Thinking:
• Candidates’ ability to think creatively about system architecture, proposing scalable and secure solutions for blockchain-based applications.
• Discussion on the future potential of blockchain technology and how the tech stack can evolve.
5. Communication and Team Collaboration:
• Clear articulation of technical challenges and how to address them in a team setting.
• Ability to lead or contribute to discussions in a way that encourages collaboration and team-driven problem-solving.

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As a Senior Backend & Infrastructure Engineer, you will take ownership of backend systems and cloud infrastructure. You’ll work closely with our CTO and cross-functional teams (hardware, AI, frontend) to design scalable, fault- tolerant architectures and ensure reliable deployment pipelines.
- What You’ll Do :
- Backend Development: Maintain and evolve our Node.js (TypeScript) and Python backend services with a focus on performance and scalability.
- Cloud Infrastructure: Manage our infrastructure on GCP and Firebase (Auth, Firestore, Storage, Functions, AppEngine, PubSub, Cloud Tasks).
- Database Management: Handle Firestore and other NoSQL DBs. Lead database schema design and migration strategies.
- Pipelines & Automation: Build robust real-time and batch data pipelines. Automate CI/CD and testing for backend and frontend services.
- Monitoring & Uptime: Deploy tools for observability (logging, alerts, debugging). Ensure 99.9% uptime of critical services.
- Dev Environments: Set up and manage developer and staging environments across teams.
- Quality & Security: Drive code reviews, implement backend best practices, and enforce security standards.
- Collaboration: Partner with other engineers (AI, frontend, hardware) to integrate backend capabilities seamlessly into our global system.
Must-Haves :
- 5+ years of experience in backend development and cloud infrastructure.
- Strong expertise in Node.js (TypeScript) and/or Python.
- Advanced skills in NoSQL databases (Firestore, MongoDB, DynamoDB...).
- Deep understanding of cloud platforms, preferably GCP and Firebase.
- Hands-on experience with CI/CD, DevOps tools, and automation.
- Solid knowledge of distributed systems and performance tuning.
- Experience setting up and managing development & staging environments.
• Proficiency in English and remote communication.
Good to have :
- Event-driven architecture experience (e.g., Pub/Sub, MQTT).
- Familiarity with observability tools (Prometheus, Grafana, Google Monitoring).
- Previous work on large-scale SaaS products.
- Knowledge of telecommunication protocols (MQTT, WebSockets, SNMP).
- Experience with edge computing on Nvidia Jetson devices.
What We Offer :
- Competitive salary for the Indian market (depending on experience).
- Remote-first culture with async-friendly communication.
- Autonomy and responsibility from day one.
- A modern stack and a fast-moving team working on cutting-edge AI and cloud infrastructure.
- A mission-driven company tackling real-world environmental challenges.

Responsibilities
Revise, edit proofread and optimize web content
Perform code reviews
Unit testing and continuous integration
Work cross functionally to enhance overall user experience of our platforms
Own various design tasks involved in the web development life cycle from start to finish
Qualifications
Bachelor's degree or equivalent experience in computer science
3+ years of experience using html, php and word press.
Proficience in at least one server side technology (Java, Php, Node js, Python, Ruby)
Ability to multitask, organize and prioritize work
About Gobillion
Gobillion is a YCombinator backed IIM-NIT alumni co-founded social commerce startup headquartered in San Francisco, USA with offices in New Delhi, Bangalore and Guwahati. We are bringing e-commerce 2.0 to the next 400 million online customers across India, through a community and social driven approach. Our co-founding has diversified experience with prestigious organizations including McKinsey & Company, Deloitte US, EY, Adobe and SAP Labs.
Gobillion has been rapidly scaling and is backed by some of the world’s most prestigious investors from US, Europe, SE Asia and India including - YCombinator, Justin Mateen (Founder - Tinder), Pioneer Fund, Soma Capital, Venture Souq, Goodwater Capital, LetsVenture, Vikalp Sahni (Co-Founder- Gobibibo) amongst others.
We have been selected for and globally validated by the world’s leading investors/accelerators including YCombinator, Founder Institute Silicon Valley, NASSCOM 10000 Startups - India and Assam Startup. We have been named as the Top 10 Global startup for YCombinator S21 by Alex Mitchell.
Summary of role: As a Developer, you will be working alongside our product team in the conceptualization, design and development of server side components. You will be doing the following on the job
- Write clean, manageable code and maintain proper documentation
- Create, test and deploy and maintain the applications on production servers
- Continuously discover, analyze, and implement new technologies and frameworks to maximize development efficiency
- Lead team in crafting solutions in different areas and ensure timely delivery
- Ensure secure architecture for Servers
Why Join Us?
- You will have a chance to be a leader and have the responsibility to scale Gobillon across India's most fast growing cities
- The opportunity to join one of India’s fastest growing companies at an early stage - We are giving our early team members to benefit from a strong ESOP pool and be part of our growth journey
- Joining an amazing team of Gobillion rockstars from colleges like IIMs, IITs, NITs etc. and from organizations including McKinsey & Company, Deloitte US, EY, Adobe, SAP Labs, Urban Company, Udaan, Amazon, Delivery, Ninjacart, Accenture etc.
- Wear the Gobillion badge with pride - We are looking for owners with a founder’s mindset - not just employees. If you are passionate about our mission about making e-commerce social for the next 400M customers in India and serve as culture carriers - we are the right place for you!
Key Responsibilities of this Role:
- Experience with DevOps and writing REST APIs & Micro services architecture
- Strong programming expertise in Node js, Nest Js
- Good understanding of Mongo databases and other NoSql Databases and SQL Database
- Solid hold on Data structures and Algorithm
- Good understanding of System Design
- Development expertise in AWS services like Lambda, SQS, SNS
- Good understanding of DevOps and Server security
- Exposure to Cloud Platforms like AWS (preferred), Azure or Google Cloud
- Unix command line experience
- Well-versed with Software Development Life Cycle
- Demonstrate the ability to be a self-starter and learn quickly
- Excellent analytical and problem-solving skills
- Passion for learning and implementing new technologies
- Excellent understanding of software Architectures
About Us
Aura is developing a platform to help companies/communities mint, buy, trade and sell NFTs in the easiest manner possible. Developing a state of the art store front customized to the community and a user friendly interface to unlock the digital growth of companies in the gaming, art, music, etc space by leveraging the power of NFTs. We are assembling a high performing team from the tech ecosystem to build this product and compete with the likes of NBA TopShot.
Requirements:
- Integration of user-facing elements developed by a front-end developers with server side logic
- Building reusable code and libraries for future use
- Optimization of the application for maximum speed and scalability
- Implementation of security and data protection
- Design and implementation of data storage solutions
Skills and Qualifications:
- 2+ years of experience in Node.js. Basic understanding of front-end technologies and platforms, such as JavaScript, HTML5, and CSS3
- Good understanding of server-side CSS preprocessors, such as LESS and SASS
- Integration of multiple data sources and databases into one system
- Management of hosting environment, including database administration and scaling an application to support load changes
- Understanding differences between multiple delivery platforms such as mobile vs desktop, and optimizing output to match the specific platform
- Implementing automated testing platforms and unit tests
- Proficient understanding of code versioning tools, such as Git
- Proficient understanding of security principles
- Understanding of “session management” in a distributed server environment
- Must have an understanding of SQL and NoSQL databases like Postgres, MySQL, Mongodb etc.
- Must have an understanding of Cloud: AWS or GCP
- Must have a good understanding of data structures and Algorithms
Benefits:
- Work on the cutting edge of blockchain technology and the upcoming use-case of NFTs (Non Fungible Token)
- Be a part of an early stage startup with funding from founders of Polygon
P.S. The website to our company is https://auranft.co/

Developer should have 2-4 years of experience, with a indepth knowledge on how web/mobile app works.
Should have the following knowledge
- RESTful APIs, Python and Django or flask
- Database concepts (MySQL, PostgreSQL, MongoDB, Redis)
- GraphQL
- Version Control tools (Git)/Github/BitBucket
- Ability to communicate and have good writing skills
- Familiarity with multi-threaded applications
- Understanding of Linux Environment and unit test and debugging skills
● 3+ years of experience in NODEJS development.
● Experience in design, development, and deployment of the
application.
● Knowledge of Restful Web-Services, JSON, HTTP, Networking
protocols
● Knowledge of MVC architecture.
● Mandatory Tech Skills: PHP, NodeJS, JavaScript, SQL, NoSQL,
GIT.
● Good to Have: Laravel, Express, AWS
● Basic understanding of HTML, CSS

- Strong proficiency in MySQL database administration, migrations /up-gradation, patching, cloning, capacity planning, designing, and automation of database tasks.
- Good experience with the latest versions of the database
- In-depth experience configuring database replication on multiple versions
- Strong experience in Monitoring, DB Performance Tuning, DB Availability, DR, Security, Storage
- Analyzes and provides recommendations to optimize the database for improved performance, manageability, and scalability
- Expertise in enterprise backups, recovery, and performing point-in-time recovery Experience in deploying and integrating PM tools
- Experience in data partitioning and encryption
- Knowledge of de-facto standards and best practices in MySQL and MongoDB
- Proficient in writing and optimizing SQL statements and Knowledge of MySQL features, such as its event scheduler
- Familiarity with other SQL/NoSQL databases such as PostgreSQL, MongoDB, etc.
- Knowledge of limitations in MySQL and their workarounds in contrast to other popular relational databases
- Proficient understanding of code versioning tools such as Git / Mercurial / SVN
- Developing and maintaining all server-side network components.
- Ensuring optimal performance of the central database and responsiveness to front-end requests.
- Collaborating with front-end developers on the integration of elements.
- Designing customer-facing UI and back-end services for various business processes.
- Developing high-performance applications by writing testable, reusable, and efficient code.
- Documenting Node.js processes, including database schemas, as well as preparing reports.
- Keeping informed of advancements in the field of Node.js development.
Zycus was incorporated in Princeton, U.S. in 1998. Since then, we have grown everyday, and established as an organization which now is a leading global provider of complete Source-to-Pay suite of procurement performance solutions.
We develop cloud-based (SaaS) https://www.zycus.com/solution/procurement-performance.html">Source-to-Pay solutions for large global enterprises, and have successfully deployed about 200 solutions to over 1000 Global clients. Our spirit of innovation and our passion to help procurement create greater business impact are reflected among procurement solution deployments that we have undertaken over the years. We are proud to have as our clients, some of the best-of- breed companies across verticals like Manufacturing, Automotives, Banking and Finance, Oil and Gas, Food Processing, Electronics, Telecommunications, Chemicals, Health and Pharma, Education and more.
With a team of 1000+ employees, we are present in India with 3 development centers at Bengaluru, Mumbai & Pune and offices in thehttps://www.zycus.com/careers/US-Careers.html">U.S., U.K., Australia, https://www.zycus.com/press-releases/zycus-expands-middle-east-presence-with-new-location-in-dubai.html">Dubai and https://www.zycus.com/press-releases/zycus-continues-global-expansion-with-new-office-in-singapore.html">Singapore and Netherlands.
http://www.zycus.com/">Know more about the LEADER of: Gartner’s 2013, 2015 & 2017 Magic Quadrant for Strategic Sourcing Application Suites and The Forrester Wave™: eProcurement, Q2 2017
PRODUCT PORTFOLIO
7 Product Lines
OFFICES
Princeton, Chicago, Atlanta, London, Netherlands, Melbourne, Bangalore, Mumbai, Pune
MARKET SIZE
USD 2 Billion and grows tremendously during economic downturns
Skill & Experience:
Experience : 4 to 6 years
- Strong understanding of JavaScript/Object Oriented JS, its quirks, and workarounds.
- Must have working knowledge of Node JS.
- Must have knowledge of any one Node JS framework such as Express.js, Hapi.js, Sails.js, etc.
- Understanding of REST API and MVC.
- Understanding of Asynchronous Request handling techniques.
- Understanding of Unit testing frameworks like Mocha/Chai.
- Proficient understanding of code versioning tools, such as SVN or GIT.
- Good to have understanding of Design Patterns and SOLID OOP principles.
- Understanding of modern JavaScript development techniques
Should be able to optimize & effectively manage resources and time of the team members.
Should be able to identify, track and mitigate risks to the product
Should not hesitate to carry out healthy and constructive confrontation with team members, peers and managers for the benefit of Product.
- Attractive compensation with a fast track growth opportunity.
- Opportunity to work with a Young and dynamic innovative team of UI professionals .
- Flexible and employee friendly organization



