
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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● Implementing effective security protocols, data protection measures, and
storage solutions.
● Maintaining all the required documents for your project.
● Constantly coming up with new ideas and also implementing them to
improve the app’s performance.
● Define and communicate technical and design requirements.
● Learn about new technologies and stay up to date with current best
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Requirements
● Knowledge of the database and familiarity with the schema design in
NoSQL (i.e MongoDB)
● Knowledge of Relational databases like MySQL will be preferred.
● A good understanding of the Software Development Lifecycle
● Knowledge of API design and development using REST
● Knowledge of version control systems like Git.
● Good understanding of object-oriented programming(OOP) and OOP
patterns.
● Again, You don’t have to know it all in-depth but you should know how to
dig the internet for finding the solutions.

Skills:
Strong knowledge of MYSQL/PostGreSQL; Knowledge of MongoDB, Redis, Couch DB is preferred.
Expertise in application development, databases, version control, and deployment. Skill - Node.js,
Experience of AWS or GCP - especially services such as Lambda or google app engine
Solid grasp of Service-oriented architecture. Web Services implementation on a medium to large scale
Solid understanding of scaling mobile app services. Having worked the backend of an Android app is preferred
Culture:
Ability to work independently with minimal supervision
Happy to deal with, and contribute to, an environment of daily builds Has worked in small teams, is versatile. Work within short timelines and be receptive to business needs. Can work closely with Digital, Product, Operations teams.
Desirable Social Attributes:
Has contributed to one or more Open Source projects through own initiative. Has provided a high quality answer to a question posted on StackOverflow.
Role:
As a Software Developer who would work independently, the candidate is expected actively acquire problems and deliver solutions as well as guide the team technically. Such a problem solver would obviously be a self starter with a high level of curiosity rather than a programming language specialist.
He/she would be required to produce software of the highest quality through self-discipline, clear and engaged communication, and attention to detail. The role would include custom web application development on (most typically on Node.js and PHP/Python), databases (most typically MySql and MongoDb), version control (github), testing (necessarily through test scripts written before code is written), daily builds and eventual deployment onto AWS or GCP.
Attributes of the ideal candidate:
Highly productive software developer with the proven aptitude to understand and apply technology
Determination to succeed despite obstacles and challenges, and a positive attitude favoring achievement of goals over open-ended investigation
Always learning, evolving, and sharing what you know
Inspired by complex, varied problems and rapid change
Open-minded, flexible, and curious about new and better ideas

Location: Remote
Roles and Responsibilities
- Effectively contribute to FileSpin with the development of new and innovative features
- Work on our core API services
- Write tested and maintainable code following coding standards and best practices
- Contribute to the improvement of integration and internal tools
- Maintain existing features
Desired Candidate Profile
We are looking for a Senior Software Engineer (Backend) to join us and be on our ambitious growth journey. In this role, you will help build FileSpin into the most innovative Digital Asset Management platform in the world. You will have ample opportunities to work in areas solving awesome technical challenges and learning along the way.
Our 2022 roadmap focuses on: creating an amazing API and UI, scaling our cloud infrastructure to deal with an order of magnitude higher media processing volume, implementing more ML pipelines and tuning the stack for high-performance.
Perks and Benefits
- Fully Remote
- Equity options
- Holidays
- Flexible working hours
- Budget for your remote work setup
- Life Insurance
The intangibles:
- A culture that values your contribution and gives you autonomy
- Startup ethos, no useless meetings
- Continuous Learning Budget
- In an entrepreneurial workplace, we value creativity and innovation
Our Mission:
FileSpin's mission is to bring excellence and joy to the enterprise. We are a fully remote team spread across the UK and Europe. We bootstrapped in a garage (true story) and have been profitable from day one.
We value innovation and uncompromising professional excellence. Work at FileSpin is challenging, fun and highly rewarding. Come and be part of a unique company that is redefining what work is.
We are setting up a team in India and looking for senior hires. We are a remote-first company.


We are hiring IN OFFICE ONLY.
Office located in the beautiful Astra Towers in Rajarhat Kolkata.
We are looking for Senior Laravel Developers that have experience with Laravel Framework PHP, and VueJs.
You will be working right away with other senior Laravel Developers that know the products. You will be learning the projects, and helping them clean up and polish our tech better. We are a product based company.
A little about us:
Klizo Solutions has over 50 employees and is located in the New Town area, near CC2. Our employees range from graphic designers, back-end developers, iOS and Android Developers, and more. We are primarily a product-focused company. Our founder is from the USA and spends about 6 months a year here going back and forth. We develop technologies around his products and develop products for a few other clients. We are looking to expand to more locations, and are hiring for those reasons. You can see a company video here: https://klizos.com/about-us/
Preferred & Required knowledge and Duties:
- MVC Structure
- SQL concept
- Eloquent Relationships
- HTTP middleware
- Basic knowledge of JQuery
- Basic command of Laravel (How to create Model, Controller, migration, middleware )
- Experience of Vue.js
- Experience with Git
- Experience integrating third-party APIs
- Experience with payment APIs
Required Shifts:
We are expected to work Monday - Friday
We may rarely be needed on a Saturday if a project is required.
BONUS Knowledge (not required):
- MongoDB
- Worked with Jira
- Knows Github / Repo / Source control
- Worked with Bitbucket
Job Types: Full-time, Permanent, In Office
Benefits
- Bonuses based on performance
- Additional training will be available and may be required
- Clean office, professional hardware, and a positive team.
Our client is looking out for an Associate Architect who has strong experience in to Technology
You will be involving in design, coding &scaling the product.
Collaborate with cross functional teams to solve complex problems.
You will be designing large scale distributed system.
Requirements:
8+ years of hands-on experience in developing, designing & scaling complex systems
Programming experience in Java, spring, Hibernate and MongoDb, micro services
Who Are We
A research-oriented company with expertise in computer vision and artificial intelligence, at its core, Orbo is a comprehensive platform of AI-based visual enhancement stack. This way, companies can find a suitable product as per their need where deep learning powered technology can automatically improve their Imagery.
ORBO's solutions are helping BFSI, beauty and personal care digital transformation and Ecommerce image retouching industries in multiple ways.
WHY US
- Join top AI company
- Grow with your best companions
- Continuous pursuit of excellence, equality, respect
- Competitive compensation and benefits
You'll be a part of the core team and will be working directly with the founders in building and iterating upon the core products that make cameras intelligent and images more informative.
To learn more about how we work, please check out
https://www.orbo.ai/">https://www.orbo.ai/.
We are looking for a qualified Backend Developer to design and code functional programs and applications. You will work as part of a team and individually with little supervision.
A great Application Developer has excellent knowledge of Javascript.
They must be familiar with a variety of operating systems and platforms. The ideal candidate will also have an analytical mindset and a keen eye for detail.
The goal is to write “clean” and flawless code to produce fully functional software applications according to requirements.
Experience: 2 years and more
CTC: Upto 18 LPA
Skills Required
- 2+ years of web application development experience using Javascript
- Experience in Node.js, and Express.js/loopback.js
- Deep understanding of RESTful APIs
- Data modelling experience in both relational and NoSQL databases(MongoDB preferred).
- Experience deploying and maintaining a micro-service architecture
- Experience with Microsoft Azure
- Experience with server-less infrastructure paradigms (AWS Lambda, etc).
- Experience building a scalable product is a bonus!
Knowledge/Qualifications/ Competency
- Any Graduate – Any Specialization with 3+ yrs of relevant strong object-oriented JavaScript & MVC with analytical/logical thinking & problem solving skills (Object Oriented JS, JQUERY, NodeJS)
Responsibilities
- You will write reusable, testable, and efficient code
- You will look to optimise applications for performance and scalability.
- You will be building secured backend API's to be consumed by multiple applications (e.g. web and mobile)
- You will constantly be collaborating with a team member and help colleagues
- You will make architectural decisions
- You will use every possible opportunity to share your own professional experience with your team members
Our perfect candidate is someone that:
- is proactive and an independent problem solver
- is a constant learner. We are a fast growing start-up. We want you to grow with us!
- is a team player and good communicator
What We Offer:
- You will have fun working with a fast-paced team on a product that can impact the business model of E-commerce and BFSI industries. As the team is small, you will easily be able to see a direct impact of what you build on our customers (Trust us - it is extremely fulfilling!)
- You will be in charge of what you build and be an integral part of the product development process
- Technical and financial growth!


https://www.alivecor.com/">AliveCor, the pioneer of the smartphone EKG, with millions of EKGs from a large and growing user base, seeks a Senior Software Engineer (Backend). You will be an integral member of our engineering team.
Responsibilities
- Software Engineer on the backend team working in the following environment: Go, Ruby on Rails, TDD/BDD with RSpec, PostgreSQL, Heroku, AWS.
- Responsible for developing industry-leading applications transforming the healthcare industry and consumers use.
- Work with our mobile and front-end teams to build new functionality in our consumer and clinician-facing applications.
- Work with our Data Science and AI team to improve functionality of our cloud algorithms and services.
- Create and maintain tools used by internal teams for customer service, monitoring, and R&D.
- Maintain and continuously improve our backend infrastructure to remedy technical limitations before they become an issue.
Qualifications and Skills
- Senior Software Engineer ready to build highly visible apps
- Engineers who can raise the skill level of their teammates
- Experience working with Go and Rails
- Experience implementing Service Oriented Architecture or Microservices
- Good intuition for weighing trade-offs
- Product instincts, work with our product and design teams to understand customer pain points, come up with solutions, and then prototype, iterate, and launch frequently
- Eagerness and willingness to learn new technologies
- Experience with build process automation and CI/CD
- Ability to work independently on projects and communicate with cross functional teams to deliver products on time
About Us
AliveCor is on a mission to define modern healthcare through data, design and disruption. We’ve pioneered the creation of FDA-cleared machine-learning techniques, transformed wearable medtech to put proactive heart care at everyone’s fingertips. Kardia is the most clinically validated mobile EKG technology. AliveCor was named as one of the Top 10 Most Innovative Companies in Health for 2017 by Fast Company as part of the publication’s annual ranking of the world’s Most Innovative Companies. AliveCor was awarded the 2015 Tech Pioneer by the World Economic Forum and one of the 50 Smartest Companies in 2015 by the MIT Technology Review. AliveCor recently announced a collaboration with Mayo Clinic that will result in new machine learning capabilities to unlock previously hidden health indicators in EKG data, potentially improving heart health as well as overall health care for a variety of conditions. AliveCor is a privately held company headquartered in Mountain View, CA.
AliveCor is an equal opportunity employer and will not discriminate against any employee or applicant on the basis of age, colour, disability, gender, national origin, race, religion, sexual orientation, or any other classification protected by federal, state, or local law.
Watch the following video demonstrating our product.
https://www.youtube.com/watch?v=8I9xosgA-Ig">https://www.youtube.com/watch?v=8I9xosgA-Ig
To design, architect, develop and maintain the backend for AI products by working closely with the Deep Learning team. To ensure successful consumption of HyperVerge technology by customers through the creation of APIs, SDKs or Applications, thereby enabling productization and monetization of the Deep Learning solutions.
OUTCOMES EXPECTED:
- Interfacing with the customer, tech team members, project managers and other relevant product people for a thorough understanding of the product, use case and business objective, detailed specification and data flow for the requirement, demonstration of the solution and clarification of queries at appropriate times during the life-cycle of the product
- Preparing test cases, setting up CI/CD and integration with logging and monitoring systems for the products or platforms by the end of 6 months
- Seeking customer feedback to continuously optimize the product for great customer experience and high technical performance in areas such as hardware efficiency, latency and throughput
- Delivering a robust backend platform for the products and platforms by incorporating important considerations regarding minimal downtime, high availability, data redundancy, tight security, etc. into the design
COMPETENCIES:
Analytical and Problem Solving Skills
- Has high grasping power. Able to quickly and proficiently understand and absorb qualitative or quantitative data and draw insightful conclusions from it. Exhibits a probing mind and achieves penetrating insights. Attention to detail. Does not let important details slip through the cracks and derail a project. Generates new and innovative approaches to problems.
Efficiency and Execution
- Able to produce significant output with minimal wasted effort in a timely manner. Focuses on key priorities.
Hard Work and Persistence
- Possesses a strong willingness to work hard and sometimes long hours to get the job done.
- Demonstrates determination and willingness to go the distance to get something done.
Flexibility and Adaptability
- Adjusts quickly to changing priorities and conditions. Copes effectively with complexity and change. Demonstrates ability to learn new things.
Calm under Pressure
- Maintains stable performance when under heavy pressure or stress.
Team Player
- Reaches out to peers and cooperates with supervisors to establish an overall collaborative working relationship. Works proactively without always being told what to do.

