
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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6 + years of hands-on development experience and in-depth knowledge of , Spring Java, Spring boot, Quarkus and nice to have front-end technologies like Angular, React JS
● Excellent Engineering skills in designing and implementing scalable solutions
● Good knowledge of CI/CD Pipeline with strong focus on TDD
● Strong communication skills and ownership
● Exposure to Cloud, Kubernetes, Docker, Microservices is highly desired.
● Experience in working on public cloud environments like AWS, Azure, GCP w.r.t. solutions development, deployment & adoption of cloud-based technology components like IaaS / PaaS offerings
● Proficiency in PL/SQL and Database development.
Strong in J2EE & OOPS Design Patterns.
Experience in developing applications using .Net Core Ver. 6/7, ASP.Net MVC (C#), .Net Core Web API & Web App, Web Services, OOPS, SOLID principles.
Experience in software development and system architecture with Microsoft technologies.
Able to integrate the database objects with the Microservices.
Expert working knowledge of Multi-threading.
Solid experience in converting .NET Framework multi-threaded services into .NET Core.
Worked as part of a cross-functional team on code reviews, internal infrastructure, and process enhancement.
Understanding of CI/CD pipeline is mandatory.
Strong hands-on experience with C# and solid principles.
Expertise in entity framework core with code first approach.
Expertise in writing RESTful services.
Knowledge of RDBMS concepts.
My Client's India is its largest studio outside USA with 400+ people and growing rapidly. It manages some of the biggest global games in the Casual Gaming, Action Strategy, Match-3, Slots, and Invest Express genres. The game teams are responsible for the long term-vision of the game, its entire Game Design & Tuning, Product Roadmap, Features, Content & Creative decisions, Art work (2D, 3D, Animation), Development, QA/Testing, Analytics & Performance Tracking, User Acquisition & Live Operations.
The India team is full of passionate gamers, who love to play, build great products, and have fun doing it. Studio I expect continued growth and is looking for strong leaders to expand the studio into this next growth phase.
As a Principal Software Engineer, you will be responsible for the software design of large scale applications and features & enhancements which reaches millions of players. You should be passionate about players, performance, scalability and holds a very high bar for quality of the game.
Responsibilities
- Work with Product Management to translate business requirements into technical requirements.
- Owns technical roadmap, design and review for end-to-end games, ensure design quality and integrity
- Modernizing the tech stack
- Bring tech innovations in the game which will help in growth of the games
- Design, code, and develop new features/fix bugs/add enhancements
- Analyze and improve efficiency, scalability and stability of various system resources
- Lead and Mentor junior engineers and drive a culture of technical perfection.
- Drive creative and innovative solutions to complex problems, exemplifying good technical discernment.
- Drive improvements and new approaches to address potential systemic pain points and technical debt, anticipate and avoid problems.
- Take a hands-on approach in the development of prototypes, independently and with others, to establish design decisions and/or technical feasibility.
Required Skills
- Masters or Bachelor’s Degree in Computer Science, Engineering or equivalent
- A minimum of 7 years of professional experience in software development, mobile, desktop or web application development with hands on coding experience covering full stack
- Experience coding in C#, C++, Python, Javascript and SQL
- Working knowledge of mobile landscape, architectures, trends, and emerging technologies.
- A proven foundation in computer science, with strong competencies in data structures, algorithms, OOPS and software design
- Strong problem solving and debugging skills
- Excellent communication skills and the ability to work effectively in a team environment.
Desired Skills
- Experience with mobile development – Android/iOS/Native OR on game engines such as Cocos-2D, Unity or other.
- Experience with Amazon Web Services (EC2, ELBs, ElastiCache, DynamoDB, terraform etc)
- Experience with setting up server monitoring, alerting and server provisioning
- Familiarity with micro service architecture, containers and related technologies (Docker, Kubernetes, ECS)
- Experience with development tools & integrated build systems: XCode, IntelliJ, Git/Jenkins
- Experience of driving activities, review process to ensure software and product quality.
- Willing to pick up any languages, technologies, or methodologies necessary to smite a challenge—and if a conventional solution does not exist, then innovate as necessary.
What we offer you:
- Work in a studio that has complete P&L ownership of games
- Competitive salary, discretionary annual bonus scheme and RSUs
- Full medical, accident as well as life insurance benefits
- Catered breakfast, lunch and evening snacks
- Child care facilities for women employees and discounted facilities for male employees
- Well stocked pantry
- Generous Paid Maternity/Paternity leave
- Employee Assistance Programs
- Active Employee Resource Groups – Women
- Frequent employee events
- Additional leave options for most employees
- Flexible working hours on many teams
- Casual dress every single day
- Work with cool people and impact millions of daily players!
• Proven working experience in backend app development and experience with Node JS.
• Build advanced ecommerce backend applications for the multiple client platforms (both React and Android).
• Understanding of design principles and good architecture patterns.
• Proper Data Structures and Algorithm knowledge is a must.
• Graph QL and Apollo Server knowledge.
• Collaborate with cross-functional teams to define, design, and ship new features.
• Work with outside data sources and APIs like the one of Unicommerce.
• Create Unit-test code for robustness, including edge cases, usability, and general reliability.
• Work on bug fixing and improving application performance.
• Continuously discover, evaluate, and implement new technologies to maximize development efficiency.
• Translate designs and wireframes into high quality code.
• Have a good understanding of CI/CD tools (any).
• Robust knowledge of popular databases like MongoDB, Elastic Search, DynamoDB, Redis etc;
• Knowledge about AWS Services like EC2, Lambda, Kinesis, Redshift, S3 is super plus.
MUST HAVE
• CI/CD
• 3+ years in Node JS
• HTML, CSS, JavaScript
• MongoDB, Elastic Search, DynamoDB, Redis
• AWS Services like EC2, Lambda, Kinesis, Redshift, S3 is super plus.
• Data Structures and Algorithm knowledge is a must.
Requirement:
- Bachelor’s Degree or equivalent degree in computer science.
- Min 1 year of experience in Backend Development.
- Experience in Golang is a must.
- Experience in creating and dealing with REST API and socket technology.
- Working Knowledge of RabbitMQ and Kafka.
- Knowledge of both SQL and NoSQL databases, along with Redis and elastic search.
- Working knowledge of network communication, TCP, UDP, HTTP, etc
Roles and Responsibilities:
- Participate in the entire application lifecycle, focusing on coding and debugging.
- Write clean code to develop functional web applications.
- Troubleshoot and debug applications.
- Perform UI tests to optimize performance.
- Manage cutting-edge technologies to improve legacy applications.
- Collaborate with Front-end developers to integrate user-facing elements with server-side logic.
- Gather and address technical and design requirements.
- Provide training and support to internal teams.
- Build reusable code and libraries for future use.
- Liaise with developers, designers, and system administrators to identify new features.
- Follow emerging technologies.
- Optimizing multiple producers and multiple consumer systems.
- Develop a Fault-tolerant application design.
| Python |
| FastAPI / Django Framework |
| Database concept, API & SQL's |
| SSO, Oauth2, JWT, Microservices |
| MVC, ORM |
| 1) Write effective, scalable code |
| 2) Develop back-end components to improve responsiveness and overall performance Integrate user-facing elements into applications. |
| 3) Test and debug programs. |
| 4) Improve functionality of existing systems. |
| 5) Implement security and data protection solutions. |
| 6) Assess and prioritize feature requests. |
| 7) Coordinate with internal teams to understand user requirements and provide technical solutions |
| 8) Debugging programs and integrating applications with third-party web services. |
- The Architect/ Lead Backend Engineer will handle the digital experience from inception to go-live model.
- The role holder is expected to create a vision and roadmap for the digital experience to provide best in class customer experience for each of the product solutions handled. The role holder will play a critical role in leading the innovation and growth of our front end web and mobile platforms.
- Must be from Good Companies and have been working on high Scale of Traffic
- Proficiency in engineering practices and writing high quality code, with expertise in either one of Java or Groovy or Go.
- 3+ years of experience building microservices.
- Strong experience in architecting and building distributed systems, scalability, and availability
- Strong knowledge of data structures, algorithms, and designing for performance
- Strong knowledge of cloud technologies like AWS/Google Cloud/Azure
- Good understanding of RxJava or Actors framework
- Proficient with RDBMS
- Strong knowledge on data stores, database design, data modelling and SQL queries
- Extensive experience building and owning large- scale distributed backend systems
- Experience working with three or more of : Unix/Linux environments, Distributed and parallel systems, Workflow automation, CI/CD Platform development, Cloud platforms development e.g. AWS/GCP, Kubernetes/Container platforms based development
Role Description of Senior Software Engineer (.Net) – Full Stack
Your role would primarily be to strengthen our product by building and adding new product and improving the existing product features on the platform to improve existing offerings like
- AI enabled remote proctoring and video-based Virtual Examination Solutions
- Coding Skills Evaluation Solution for 15+ programming languages
- Interview Product Like AonLive for corporates to virtually interview candidates.
- CoCubes Assessment to assess candidates and apply for Jobs
The position will be based out of Gurgaon.
Primary Responsibilities
- .Net programming to build a world class product which is scalable and secure (model to be used by millions of users)
- Responsible for designing and appropriately structuring of code, developing modules, testing and productionalizing the modules with minimal handholding.
- Own the delivery of modules with minimal supervision and ensure delivery as per release plan
- Deliver product releases in rapid iterations; manage risks, dependencies, quality issues, delivery and integration timelines
- Contribute individually as well as manage a small team of junior resources
- Ensure compliance with guidelines, framework and best practices of the organization
- Work with global team and global products
Experience
- 3-6 years of strong experience in C#, Asp.Net/MVC/Razor Pages, SQL, Java Script, Jquery/Angular JS and HTML
• Strong programming and web development expertise in ASP.Net
• Experienced in handling end to end modules / client delivery independently
• Should have managed junior team members
Desired Qualifications / Traits
- Good business acumen and analytical / problem solving abilities (including eye for detail)
• Self driven, persistent, action oriented and goal driven
• Integrity and professionalism in work
We Strongly Believe in
- Work Life Balance – Maintain a healthy balance between your work and personal life.
- Open Culture– We encourage open communication and feedback. Every one is easily approachable. No closed work cubicle in the office.
- Empowerment–Employees are given certain degree of autonomy and responsibility for decision making.
- Fun at Work – We believe fun and work go hand in hand. Parties and celebrating various occasions are integral part of the culture.
- Learning & Development–Through periodic AON training programs, focus is to keep improving employee’s technical and business skill.
Compensation
Compensation is best in the industry depending on experience and skills.
Ideal candidate must have :
- 2+ years of experience in writing code
- Ability to meet tight deadlines
- Can work independently and be a team contributor
- Must have good knowledge of Node, Python and Scripting languages
- Experience in one or more of RDBMS - PostgreSQL, MySQL or Oracle
- Experience with NoSQL and real-time DB - Firebase/Firestore or MongoDB
- Must be able to write concise and high-quality API
- Must be a quick learner, curious and ambitious








