
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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Join an innovative and groundbreaking cybersecurity startup focused on helping customers identify, mitigate, and protect against ever-evolving cyber threats. With the current geopolitical climate, organizations need to stay ahead of malicious threat actors as well as nation-state actors. Cybersecurity teams are getting overwhelmed, and they need intelligent systems to help them focus on addressing the biggest and current risks first.
We help organizations protect their assets and customer data by continuously evaluating the new threats and risks to their cloud environment. This will, in turn, help mitigate the high-priority threats quickly so that the engineers can spend more time innovating and providing value to their customers.
About the Engineering Team:
We have several decades of experience working in the security industry, having worked on some of the most cutting-edge security technology that helped protect millions of customers. We have built technologies from the ground up, partnered with the industry on innovation, and helped customers with some of the most stringent requirements. We leverage industry and academic experts and veterans for their unique insight. Security technology includes all facets of software engineering work from data analytics and visualization, AI/ML processing, highly distributed and available services with real-time monitoring, integration with various other services, including protocol-level work. You will be learning from some of the best engineering talent with multi-cloud expertise.
We are looking for a highly experienced Principal Software Engineer to lead the development and scaling of our backend systems. The ideal candidate will have extensive experience in distributed systems, database management, Kubernetes, and cloud technologies. As a key technical leader, you will design, implement, and optimize critical backend services, working closely with cross-functional teams to ensure system reliability, scalability, and performance.
Key Responsibilities:
- Architect and Develop Distributed Systems: Design and implement scalable, distributed systems using microservices architecture. Expertise in both synchronous (REST/gRPC) and asynchronous communication patterns (message queues, Kafka), with a strong emphasis on building resilient services that can handle large data and maintain high throughput. Craft cloud solutions tailored to specific needs, choosing appropriate AWS services and optimizing resource utilization to ensure performance and high availability.
- Database Architecture & Optimization: Lead efforts to design and manage databases with a focus on scaling, replication, query optimization, and managing large datasets.
- Performance & Reliability: Engage in continuous learning and innovation to improve customer satisfaction. Embrace accountability and respond promptly to service issues to maintain and enhance system health. Ensure the backend systems meet high standards for performance, reliability, and scalability, identifying and solving bottlenecks and architectural challenges by leveraging various observability tools (such as Prometheus and Grafana).
- Leadership & Mentorship: Provide technical leadership and mentorship to other engineers, guiding architecture decisions, reviewing code, and helping to build a strong engineering culture. Stay abreast of the latest industry trends in cloud technology, adopting best practices to continuously improve our services and security measures.
Key Qualifications:
- Experience: 8+ years of experience in backend engineering, with at least 5 years of experience in building distributed systems.
- Technical Expertise:
- Distributed Systems: Extensive experience with microservices architecture, working with both synchronous (REST, gRPC) and asynchronous patterns (SNS, SNQ). Strong understanding of service-to-service authentication and authorization, API rate limiting, and other critical aspects of scalable systems.
- Database: Expertise in database technologies with experience working with large datasets, optimizing queries, handling replication, and creating views for performance. Hands-on experience with relational databases (e.g., PostgreSQL, MySQL) and NoSQL databases (e.g., DynamoDB, Cassandra). Expertise in various database technologies and deep experience with creating data models that provide consistent data views to the customer while data is being morphed, handling data migrations, and ensuring data integrity and high availability.
- Kubernetes: In-depth knowledge of Kubernetes, with experience deploying and managing services in Kubernetes clusters (EKS, AKS). Strong understanding of pods, services, networking, and scaling applications within Kubernetes environments.
- Golang: Proven experience using Golang as the primary programming language for backend development. Deep understanding of concurrency, performance optimization, and scalability in Golang applications.
- Cloud Technologies: Strong hands-on experience with AWS services (EC2, S3, DynamoDB, Lambda, RDS, EKS). Experience in designing and optimizing cloud-based architectures for large-scale distributed systems.
- Problem Solver: Strong problem-solving and debugging skills, with a proven ability to design and optimize complex systems.
- Leadership: Experience in leading engineering teams, guiding architectural decisions, and mentoring junior engineers.
Preferred Skills:
- Experience with infrastructure as code (Terraform, CloudFormation).
- Knowledge of GitHub-based CI/CD tools and best practices.
- Experience with monitoring and logging tools (Prometheus, Grafana, ELK).
- Cybersecurity experience.
[Senior NodeJS Developer] JP Funware & Technologies
Our Vision
JP Funware & Technologies is a new India-based online gaming company foraying into real money gaming with a portfolio that spans skill games (RummyXL) and many more upcoming ultimate games. The company specializes in technology and artificial intelligence to provide amazing game-playing experiences across its platforms. The Company for a future where the platform can deliver a culturally relevant and enjoyable experience in the Indian gaming environment, with features like easy payment withdrawal, less commission, and much more
The Role
JP Funware & Technologies is looking for a Senior NodeJS Developer passionate about working on core system architecture and cutting-edge technology with the experience and knack for real-money gaming. The ideal candidate should have experience in developing high-performance, scalable and secure applications using Node.js. You will be responsible for developing and maintaining server-side applications, implementing new features and fixing bugs, and collaborating with other team members to ensure the success of the project.
Key Responsibilities
· Creating and maintaining server-side application logic.
· Ensuring optimal performance of the central database and responsiveness to front-end requests.
· Collaborating with front-end developers on the integration of elements.
· Developing high-performance applications by writing testable, reusable, and efficient code.
· Implementing effective security protocols, data protection measures, and storage solutions.
· Collaborate with front-end developers on combining their front-end elements and components with the server side.
· Work on security and data protection.
· Incorporate data storage solutions (MongoDB).
· Running diagnostic tests, repairing defects, and providing technical support.
· Documenting Node.js processes, including database schemas, as well as preparing reports.
· Design and optimize applications for high performance, high availability, and low latency
· Write clean, maintainable, and efficient code.
· Troubleshoot and debug applications.
· Familiarity with how to create scalable Node.js applications.
Key skills and Experience Required
· At least 6 years of experience in developing Node.js applications.
· Strong understanding of JavaScript and Node.js.
· Experience with popular Node.js frameworks such as Express, Koa, or NestJS.
· Strong knowledge of database technologies such as MongoDB, MySQL, or PostgreSQL.
· Experience with Git and version control.
· Extensive knowledge of socket.io libraries, and frameworks (Express).
· Working knowledge of front-end technologies such as HTML5 and CSS3.
· Familiarity with how to create scalable Node.js applications.
· Great organizational and time management skills.
· Strong problem-solving and critical thinking skills.
· Excellent communication and collaboration skills.
· Master's degree in computer science, information science, or related field (preferred)
Why Explore a Career at JPFT
· Disproportionate Learning
All you need to bring to the table is a passion for Real Money Games and/or Tech. The responsibility for your growth and managing your learning curve is totally ours. Real money games are one of the most challenging businesses from a Tech & Operations point of view and we intend to expose our employees to various facets of their domain to make them rich with hands-on experience.
· Work-Life Balance
We do not glorify working overtime in the name of "startup hustle / hyper growth mindset". Efficiency is best driven when there is a solid work-life balance for our team members and we swear by this principle.
· Wealth Creation
Attractive compensation way above the market along with our generous bonus policy helps us in helping our younger and more passionate team members focus on wealth creation at the very stage of joining the organization.
· Peace of Mind
Flexible work culture and openness have been an integral part of our company structure from the beginning. We believe in taking care of your mental, physical, and emotional well-being.
It is a golden opportunity to be a part of the team and embark on a two-fold journey - enhancing the sports engagement of an average Indian and being the best RMG tech organization in the country. If you love sports and are passionate about technology and RMG, THIS IS THE PLACE for you!
Benefits at JPFT
Competitive Pay Packages || Swanky & vibrant workspace in Gurgaon || Investment in Learning & Development / Training || Employee Friendly Work Practices || Flexible Leave Policy || Company Laptop || Annual Offsite || Solve Challenging Problems|| High Scope of Innovation
Interview Process JPFT
· Exploratory Call by the HR Team
The uniqueness of the hiring process at JPFT is that at least ONE Founder will be present in all your interviews. This ensures the candidate gets a very strategic view of where the company aims to be in the medium/long term.
· One Technical Round – The technical round is to gauge & understand competence on the desired skill set and alignment from a technical standpoint.
· Final Round with the Founding Team to understand alignment on the vision and long-term plans of the organization.
JPFT's Tech Stack
NodeJS
Redis
Socet.io
MongoDB
AWS
Unity, C#
Required Skills:
- 3+ year of experience in Development in JAVA technology.
- Strong Java Basics
- SpringBoot or Spring MVC
- Hands on experience on Relationl Databases (SQL query or Hibernate) + Mongo (JSON parsing)
- Proficient in REST API development
- Messaging Queue (RabitMQ or Kafka)
- Microservices
- Any Caching Mechanism
- Good at problem solving
Good to Have Skills:
- 4+ years of experience in using Java/J2EE tech stacks
- Good understanding of data structures and algorithms.
- Excellent analytical and problem solving skills.
- Ability to work in a fast paced internet start-up environment.
- Experience in technical mentorship/coaching is highly desirable.
- Understanding of AI/ML algorithms is a plus.


JD / Skills Sets
1. Good knowledge on Python
2. Good knowledge on My-Sql, mongodb
3. Design Pattern
4. OOPs
5. Automation
6. Web scraping
7. Redis queue
8. Basic idea of Finance Domain will be beneficial.
9. Git10. AWS (EC2, RDS, S3)
- 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 Summary: Back-end Developer who would contribute towards building a highly flexible and scalable Back- end by bringing deep core technology expertise.
Job Description:
- Develop modules keeping micro services architecture philosophies in check. - Implement and/or oversee implementation of different modules as part of an integrated development team. - Drive evolution of application performance. - Ensure project scalability by having good project architecture
Skill Requirements:
- Strong Node.js. - Strong database technology skillsets, namely MongoDB, MySQL
- Should have experience of using Rabbit MQ.
- Python (Django) skills are a plus. - A skilled and pragmatic approach.
- Experience with user-centred design, test-driven development, iterative/incremental and agile practices. - Experience with AWS deployment a definite plus.
Individual applying to the role should ideally have the following attributes.
-Passionate about back-end Development and continually follow the platform & innovations
-Strong and innovative approach to problem solving and finding solutions
- Excellent communicator (written and verbal, formal and informal)
- Flexible and proactive/self-motivated working style with strong personal ownership of problem resolution
- Ability to multi-task under pressure and work independently with minimal supervision.
- Ability to prioritize when under pressure.
1. Ability to work in a fast-paced environment with minimal supervision
2. Experience in Agile development using JIRA, GIT, Confluence.
3. 3+ years of Experience in node.js + Express.
4. Experience in profiling, debugging & troubleshooting Node.js processes.
5. Strong Experience as a backend developer for REST API design.
6. Strong knowledge of SQL/NoSQLdatabases like PostgreSQL / MySQL or MongoDB
7. Understanding accessibility and security compliance
8. Understanding fundamental design principles behind a scalable application.
9. User authentication and authorization between multiple systems, servers, and
environments.

About the Role
The Engineering team in Bangalore, India is building products for the Martial Arts
fans across the world. As part of the engineering team, you would be expected to have
deep technology expertise with a passion for building highly scalable products.
This is a unique opportunity where you can impact the lives of people across 150+
countries!
Responsibilities
Own architecture, design, development, and implementation of different
modules/features of the services
Design, develop, deploy and support web applications.
Discover opportunities for performance improvements
Recommend ways to improve reliability, efficiency and code quality
Focus on continuous delivery and reducing complexity
Carry out code reviews and manage pull requests
Build applications based on micro-services architecture.
Requirements
Overall 1~3 years of experience in Backend development.
B. E/B. Tech in CS or equivalent streams from institute of repute (IITs, NITs, BITs,
IIITs or equivalent)
Strong object oriented design skills & knowledge of design patterns
Experience designing & developing distributed systems involving multiple web
services, databases (both SQL and NoSQL), caches, queues, etc. taking into
consideration scalability, availability, fault tolerance, consistency, etc. of the
overall system
Well-aware of and enforces development best practices: Unit Tests, Code Reviews,
Integration Tests, CI/CD, Monitoring, Alerting, etc.
- Working knowledge of Node-Sync, callback hell and ways to control asynchronous behavior of Node functions.
- Strong command on ES6(EcmaScript) or Javascript and its concepts like prototypes, call back, closures etc
- Should have deep understanding of Native Node.js, Express.js, HAPI.js and middlewares.
- Candidates must have proper understanding and command on RESTful API development and consumptions.
- Candidates must know to use promises, async-await to control synchronization of business logic components.
- Candidates must have knowledge of JWT, oAuth and passport.js for user authentication.
- Candidates must have knowledge of GIT, Bit-bucket.
- Candidates must have knowledge of application deployment.
- Experience with NoSQL databases eg mongodb (preferred).


