
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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About Tamasha
Tamasha is a product-led technology company focused on building immersive,
real-time social and gaming experiences for the next generation of users. Our
products combine scalable backend systems, real-time communication, and AI
driven intelligence to create engaging digital ecosystems.
Our flagship products include:
• Openly – A modern social engagement platform enabling meaningful
conversations and community-driven interactions.
App: https://play.google.com/store/apps/details?id=com.openly.app
• FriendChat – A real-time chat-first social product designed for seamless, low
latency conversations.
• Playroom (Voice Chat) – A live voice-based social gaming experience enabling
players to connect, communicate, and collaborate in real time.
App: https://play.google.com/store/apps/details?id=com.playroom.voice
Role Overview
We are looking for a hands-on SDE 2 – Backend Developer (Node.js) who will play
a critical role in building scalable backend systems, integrating AI-driven solutions,
and shaping Tamasha’s technical foundation.Key Responsibilities
Hands-on Engineering: Actively code, design backend architecture, and solve
complex technical problems.
AI & Emerging Tech: Integrate AI agents, automation, and recommendation
systems.
Scalable Infrastructure: Design secure, scalable cloud systems on GCP and
Azure.
DevOps & Deployment: Build and manage CI/CD pipelines and monitoring
systems.
Engineering Excellence: Ensure high-quality, secure, and performant code.
Cross-functional Collaboration: Work closely with product, design, and business
teams.
Team Building & Mentorship: Mentor engineers and support hiring initiatives.
Required Skills & Experience
3–4 years of backend development experience in a product-based company
Strong expertise in Node.js (Express / NestJS)
Experience with SQL and NoSQL databases
Hands-on experience with cloud platforms (GCP / Azure)
Experience with CI/CD pipelines and DevOps practices
Strong understanding of system design and scalability
Why Join Tamasha?
• Build products used by thousands of real users
• Work on AI, real-time systems, and scalable architectures
• High ownership and fast growth opportunities
• Strong engineering culture with startup agility
Job description
Full Stack Developer (Backend Focus)
Company: Suntek.ai
About Suntek.ai:
Suntek.ai is a premier digital solutions provider specializing in cutting-edge e-commerce development. With hands-on experience managing and scaling multiple renowned brands on Shopify, we empower small and medium businesses with enterprise-grade digital capabilities. Our
focus is on seamless omnichannel experiences, advanced automation, and high-performance architecture to maximize growth and ROI
Experience: 2-4 years
Location: Remote
About the Role:
We're looking for a full-stack engineer with a strong backend focus to join our team. You'll work on building and maintaining scalable server-side applications while occasionally contributing to frontend development.
What You'll Do
- Design, develop, and maintain backend services and APIs
- Work with databases to ensure data integrity and optimize performance
- Collaborate with cross-functional teams to deliver features end-to-end
- Write clean, testable, and well-documented code
- Participate in code reviews and contribute to technical decisions
Required Skills
- Node.js: Solid experience building server-side applications
- TypeScript Strong typing practices and modern JavaScript/TypeScript patterns
- PostgreSQL Database design, querying, and performance optimization
- NestJS Experience with this framework (or similar structured Node frameworks)
- GraphQL Familiarity with building or consuming GraphQL APIs
- Networking fundamentals: understanding of TCP/IP, UDP, and how web protocols work
Nice to Have
- Docker Containerization and local development environments
- Terraform Infrastructure as code experience
- Cloud platforms: Hands-on experience with AWS, GCP, or Azure
What We Offer:
- 100% remote position with flexible work hours.
- A supportive, high-agency team environment that encourages creativity and initiative.
- Ongoing opportunities for skill development and growth.
- Competitive salary and benefits package.
About the Role
We’re looking for energetic, sharp-minded Node.js Developers with incredible algorithmic thinking and real world experience in building scalable systems. If you have 4–6 years of hands-on experience with Node.js and TypeScript, and want to create something meaningful at scale, this is your calling.
- Location: Gurugram (In office)
- Experience: 2–6 years
- Open Roles: 5–10 Developers
- Type: Full time, Permanent
What You'll Do
- Design, build, and maintain efficient and scalable server-side applications using Node.js and TypeScript.
- Collaborate with cross-functional teams to define, design, and ship new features.
- Write clean, modular code with strong test coverage.
- Optimize applications for speed and scalability.
- Participate in code reviews, architecture discussions, and tech brainstorming.
- Strong analytical and problem-solving skills.
- Good verbal and written communication skills.
- Ability to work effectively in a team environment.
- Strong understanding of Agile development methodologies.
- B-Tech in Computer Science, Engineering or a related field.
What We're Looking For
- 4–6 years of experience with Node.js and TypeScript(6 months atleast).
- Strong foundation in data structures, algorithms, and system design.
- Experience working in fast-paced, scalable product environments.
- Solid understanding of RESTful APIs and asynchronous programming.
- Prior experience in a high-growth startup or scalable business is a strong plus.
- Bonus if you come from an IIT or Tier1 engineering background.
Ready to Build the Future?
If you're passionate about backend engineering and want to be part of an ambitious, growing team at Infosec Ventures, we’d love to hear from you.
Apply now and let’s build something extraordinary together!
About us:
HappyFox is a software-as-a-service (SaaS) support platform. We offer an enterprise-grade help desk ticketing system and intuitively designed live chat software.
We serve over 12,000 companies in 70+ countries. HappyFox is used by companies that span across education, media, e-commerce, retail, information technology, manufacturing, non-profit, government and many other verticals that have an internal or external support function.
To know more, Visit! - https://www.happyfox.com/
We’re looking for a Lead Backend Engineer with 5+ years of experience in building web services to join our engineering team to help architect, build and run our growing list of products. You should have prior experience being responsible for building sufficiently complex products/services and mentoring software engineers.
Responsibilities:
- Lead a team of engineers working on our product roadmap. You are expected to contribute to feature development with hands-on development tasks
- Oversee software architecture, source control workflows, and CI/CD processes and perform code reviews to ensure exceptional code quality
- Improve the development experience and the quality of the codebase. You will define and uphold best practices and coding standards for the team
- Responsible for architecture and design decisions
- Own stability and performance of the service that you work on
- Work with the Engineering Manager to ship stable software on time
- Contribute to the vision and long-term strategy in your area of expertise
Requirements:
- 2+ years of experience in a technical lead role designing and building complex backend systems
- 5+ years of professional software development experience
- Excellent knowledge of best practices and coding patterns
- Deep knowledge of backend programming languages like Python and web application frameworks like Django
- Solid experience in building web services using relational databases like PostgreSQL or NoSQL databases like MongoDB
- Proficiency with Amazon Web Services (AWS) or Google Cloud Platform or Azure
- Extensive experience with Linux/UNIX production environments
- Strong sense of quality in terms of both program architecture and code style
- Passion to dig into technically complex problems to troubleshoot and figure out a solution
- Desire to continuously improve and ship the best quality product
- Pragmatic approach to make sure technical decisions align with actual business needs.
- Good understanding of the trade-offs when building for product value, reliability, or performance
- Excellent communication skills with the ability to discuss and explain your point of view clearly and effectively
- An engineering degree is a must(B.E. CS preferred)
What You'll Do :
You will be a part of our backend team working on keeping our REST API and GraphQL API up and running and making sure that our users get the right data at the right time.
You will have ownership of developing and maintaining our backend services including users, courses, and operations tools that manage our product and logistics.
You will work on architecting and scaling highly-available RESTful services and back-end systems from scratch.
This is a position for an experienced Node programmer with at least 2 years under the belt, but you don't have to be a rock star, a ninja, or a superhero to apply.
What You'll Need :
You will fit well in the backend team if you are passionate about technology and have experience programming in Node. Knowledge of technologies like Cassandra, Elasticsearch, PostgreSQL, REST and JSON will help you get going from day one.
As an experienced Node developer, you should be intimately familiar with the platform, with
JavaScript, and with the stables of full-stack web development : HTTP, JavaScript, CSS, HTML, SQL.
It's a bonus if you're broadly familiar with other languages as well- we write some services in Go and have data pipelines written in Python- but your main work will be JavaScript through and through.
You will be a perfect match with our team if you love collaborating with people from all disciplines to solve complex problems, always want to learn new skills and take ownership of your work.
Hood is a new-age anonymous social network.
Hood has recently raised $3.2Mn seed funding and is backed by top VCs, 16+ unicorn founders including Vijay Shekhar Sharma - PayTM CEO, Ritesh Agarwal- OYO CEO, Kunal Shah - Cred CEO and outstanding management team.
Role & Responsibilities
- Execute full lifecycle software development
- Architect and conceptualize the product from initiation
- Program well-designed, testable, efficient code Develop flowcharts, layouts, and documentation to identify requirements and solutions
- Integrate software components into a fully functional software system
Qualifications: -
- Bachelor's degree in Computer Science, Software Engineering or a related technical discipline.
- 2-4 years of experience in software design and development.
- Strong coding skills (JavaScript/Typescript, Node.js).
- Strong database design (MySQL/DynamoDB) and query writing skills with a commitment to performance and efficiency.
- Working knowledge of RESTful API paradigms.
- Experience building distributed domain-driven microservices.
- Strong understanding of database and storage fundamentals.
- Experience with AWS stack.
- Computer Science fundamentals in object-oriented design, data structures, algorithm design, problem-solving, and complexity analysis.
- Knowledge of React.js is a plus.
- Startup experience is a plus.
What you can expect from us
1.Learning Budget: If there's a workshop, book, or event you think will help you learn, we'll cover your bill.
2.Health insurance for you and your family.
What happens after you apply?
Step 1: Within 7 days of your application our wholesome, original & expressive - our People Team will reach out to you for a quick chat.
Step 2: Within 4-6 days of chatting with the People Team, you will get a call from someone from your future team to discuss the job role.
Step 3: If all goes well, we’ll schedule a call with your future manager to deep dive into the role with you and for you to show off your skills through a small task.
Step 4: After a quick interaction with the People Team, If our vibes match, a quick call with our Founders.
If we mutually enjoy the 4 steps, we onboard you with a big smile :)
NOTE
At any step, if things don't work out, we will proactively send out an email. You are welcome to
ask for detailed feedback and re-apply in the future.
We prefer [Passion>Skills>Education]
About Typito
Typito is an online self-serve video design tool used by marketing teams and digital journalists to publish engaging videos for social media. With more than 200,000 videos created using the platform over the last 2 years, Typito is the smallest team that was featured in https://www.g2.com/best-software-companies/india" target="_blank">G2’s Top SaaS companies from India.
We strive to build a workplace that helps everyone nurture a growth mindset and here's what our https://www.glassdoor.co.in/Reviews/Typito-Reviews-E4837925.htm" target="_blank">Glassdoor reviews say. You can learn more about https://typito.com/blog/thing-called-culture-typito/" target="_blank">our culture here and http://blog.typito.com/why-we-are-building-typito/" target="_blank">here's why we are building Typito.
If all of this looks exciting, please continue reading.
We are looking for a Senior Frontend Engineer with more than 3 years of experience on any specific front-end stack like Angular/Backbone/React or equivalent and some exposure to graphic systems and WebGL. We are keen on working with people who are passionate about product UX/UI and the role that plays in delighting the end user. It’s also important to have a strong urge to identify, learn, embrace and incorporate any new tech (responsibly) that's needed to solve our problem better.
Responsibilities
- Product Engineering ownership - he/she would be expected to work closely with Product and Marketing teams to build Typito’s product suite. Engineering feature development and Product release / deployments would be part of the ownership.
Requirements
- Strong in : HTML/JS/CSS
- 3+ years experience working with any particular backend stack (Django, Rails, Laravel, NodeJS or equivalent)
- Experience with any particular front-end stack like Angular/Backbone/React or equivalent is a bonus
- Experience with image/video processing tech is a strong bonus.
- Expertise in building web applications and APIs.
- Strong knowledge in PHP core and web framework Laravel
- Basic understanding of front-end technologies such as HTML, CSS, Javascript, Bootstrap, AJAX.
- Familiar with MYSQL query language
- Knowledge of frontend backend integration
- Knowledge in Linux based OS like Ubuntu is an added advantage
- writing well designed, testable, efficient code
- Excellent Communication Skills
- Willingness to own a responsibility
- Ability to work in a team as well as an individual
- Ability to work under pressure and maintain deadlines
- Good to have worked on end to end in projects
Role Description:
As a Lead Backend Engineer , you will be responsible for designing and deploying scalable, highly available, and fault-tolerant systems for Radiusagent. Experience as a Tech Lead, managing tasks with back-end engineers while coding themselves will be a bonus point for the ideal candidate.
Responsibilities will include-
- You will contribute to all aspects of an agile software development lifecycle including design, architecture, development, documentation, testing, and operations.
- You will build cutting-edge scalable systems by writing simple and efficient code.
- You will push your design and architecture limits for new product development.
- You will ensure compliance with the build/release and configuration management process.
Skills needed:
- be able to design and build modules from ground up
- proficient in any one programming language out of php/golang/node/python/javascript/java/ruby and ability to pick up others
- experience with mysql/postgres/mongodb/couchdb
- experience with redis/memcached
- experience with rabbitmq / kafka
- experience in having written cron jobs, troubleshooting downtime
- ability to work with ambiguous requirements
- good understanding of OS concepts
Nice to haves:
- experience with managing VMs' on aws/gcp/digitalocean
- experience with docker/kubernetes
- experience elasticsearch or lucene
As engineeing lead, you would be responsible for driving day to day development activities including coordination with customers and project management team in US. You are expected to be hands-on with the technology stacks we work with so you can contribute as a developer across projects on need basis.
Role & Responsibilities
- Lead the engineering effort across projects
- Interface with key stakeholders and apply your technical proficiency across different stages including Application Architecture, Design and Development
- Understand client's business requirements and be able to map them to technology solutions and make them work
- Design and build modern solutions informed by a deep understanding of cloud architecture and how distributed systems operate at scale
- Provide regular support and guidance to teams on complex coding, issue resolution and execution
- Establish and enforce best development and engineering practices including QA and DevOps
- Lead and manage your own team, but also get down to coding, testing, and designing solutions as and when needed
- Communicate effectively with teams, clients and business leaders within the company
Skills & Experience
- Minimum 6+ years of experience designing and building full stack applications using UI frameworks like Angular, React or Vue.JS and backend frameworks like Node.JS/ExpressJS or Python/Django/Flask or Laravel/Yii2/Symphony
- Minimum 2-3 years of experience as a Technical Lead mentoring team of 3 to 5 developers
- Strong knowlegde of cloud and distributed systems (AWS, GCP, Azure). Cloud certifications would be an added advantage.
- Deep knowledge of relational databases, SQL and NoSQL databases. Experience with Graph databases like Neo4j is desirable.
- Proficient in Git and CI-CD frameworks
- Strong communicator with visual, verbal, and writing skills to clearly articulate complex design problems and solutions
- Ability to work in an agile environment












