Senior Quality Engineer

**Role Overview:** We are seeking a skilled Web3 blockchain developer with strong experience in Ethereum and decentralized finance (DeFi). The ideal candidate should have expertise in smart contract development, ERC20 tokens, security best practices, and experience integrating with blockchain payment gateways or APIs related to stablecoins.

**Key Responsibilities:**

* Develop and deploy ERC20 smart contracts, including token minting, redemption, and transfer functionalities on Ethereum.

* Design, review, and optimize smart contracts related to crypto lending, escrow, collateral, and repayments.

* Integrate with Circle’s platform for USDC operations, understanding minting and redeeming processes via its APIs.

* Assess stability mechanisms of USDC, ensuring secure handling of minting, redemption workflows, and transactions.

* Collaborate with backend systems (Node.js / Typescript) to facilitate blockchain interactions, manage transactions, and implement error recovery.

* Implement blockchain security best practices, including transaction signing, API key management, and event validation.

* Explore interoperability between Ethereum and other blockchain networks as needed, considering costs and operational efficiency.

* Work closely with frontend and backend teams to embed blockchain transaction logic, wallet management, and transaction tracking.

* Document smart contract code, API workflows, and integration processes to support compliance and audits.

* Ensure platform adherence to relevant regulatory standards for crypto operations.

* Requirements:

* Proven experience in Ethereum smart contract development (Solidity), with a focus on ERC20 standards.

* Experience with DeFi protocols, escrow, lending, or collateral management smart contracts.

* Familiarity with Circle’s platform APIs, especially for USDC minting and redemption workflows, is a strong advantage.

* Hands-on experience with blockchain libraries such as web3.js, ethers.js, or similar.

* Understanding of blockchain transaction costs, network throughput, and interoperability considerations.

* Strong knowledge of smart contract security, auditing, and safe transaction handling.

* Experience working with backend environments like Node.js or Typescript.

* Basic familiarity with Circle’s wallet APIs, webhook integrations, and transaction validation best practices.

* Excellent coding, debugging, and documentation skills.

* Ability to work independently and collaboratively in a dynamic environment.

* 

**Preferred Skills:**

* Experience across multiple blockchain ecosystems (e.g., Ethereum, Polygon, Solana).

* Prior exposure to Circle’s API systems and USDC management workflows.

* Strong security awareness around wallet management, API key handling, and transaction validation.

* Knowledge of DeFi security audits, formal verification, or related security frameworks.

* Contributions to open-source blockchain projects or experience in blockchain community engagement.

.Frontend Developer for a Construction Tech startup.Kolkata-based or with roots in Kolkata.

Requirements:React.js,Javascript

Our Tech Stack: React.js, Node.js, MongoDB, AWS

https://www.onedigitaltrust.com/">OneDigitalTrust, Inc. is a B2B2C software startup disrupting the traditional estate planning & wellness industry to serve all adult Americans, but especially those that usually cannot afford the traditional methods to protect themselves and their loved ones. 

We are currently recruiting a Sr. Full Stack Engineer to add to our team.

We are looking for a self-motivated, goal-driven individual to help advance their experience and learn from a collaborative environment and help take our company to the next level.

Our platform is an enterprise white-label configurable platform with comprehensive capabilities that sells itself. Our biggest goals are to continue to enhance the capabilities of the platform to meet the needs of the users.

The following would be your responsibilities:

• Assuming full-stack technical delivery of the Company’s SaaS platform under the direction of the CTO; supporting the architecture and development of the product platform;

• Supporting the policies, and procedures of Company’s platform security to adhere to industry­ standards and as may be requested in case of security audit requests;

• Helping in the creating/management of the Development, Testing (QA) and Production architecture, standards processes and procedures for the product/platform;

• Helping improve the technical team's processes as per our retrospective learnings and best practices;

• Estimating bug/feature implementation tasks to help with sprint/release planning

• Experience with creating, and maintaining third-party integration partner's technical relationships and APIs integration; including handling issues, version changes, and impacts to the platform;

• Delivering and Maintaining our continuously enhanced ODT product platform;

• Helping ensure the regular release, enhancement, maintenance and operation of the ODT DEV/TEST/PROD infrastructure and environment and uptime;
• Providing key inputs into the definition of the platform’s evolution from both a requirements and technical implementation and maintenance perspective; and

• Supporting Company business development and marketing activities to promote the sale and after-sale support to prospects and customers.

The following describes the type of person we are seeking:

Experience: 

• Strong TDD mindset for automated testing, and experience with lean/agile development methodologies in a startup environment

• Experience with maintenance of CI/CD based software delivery

• Ability to get up to speed quickly on the existing code base

• Having an architectural mindset and identify where maintain and enhance systems, but also know when we can refactor components

• Have a structured / process-oriented way of thinking and are able to build new features and models that will last through significant business scaling

• Can understand business needs and ability to maintain high-value product to optimize for the best user experience.

• Bonus points for heavy test automation experience and front-end/UI experience with Storybook

What We Offer:

Competitive salary

Startup culture with a strong team-centric environment. We work hard and have fun.

Independence to work autonomously. We care about results. The opportunity to learn & master the art of agile software delivery and automated testing. We invest heavily in the development of our team members.

About the Company

Xerago is a 15-year-old Private Limited company that helps brands with their Marketing Transformation by providing integrated marketing services through its Marketing Centres of Excellence.

We are looking for a Full Stack Developer who will work on a broad range of cutting-edge technologies.

Go Xerago!

Official website - https://www.xerago.com/">https://www.xerago.com/

Go Xerago!

Experience Required – 2 to 6 years

What you’ll do

• Developing front end website architecture.
• Designing user interactions on web pages.
• Developing back end website applications.
• Creating servers and databases for functionality.
• Ensuring cross-platform optimization for mobile phones.
• Ensuring responsiveness of applications.
• Working alongside graphic designers for web design features.
• Seeing through a project from conception to finished product.
• Designing and developing APIs.
• Meeting both technical and consumer needs.
• Staying abreast of developments in web applications and programming languages.

What you’ll need

• Strong organizational and project management skills.
• Proficiency with fundamental front end languages such as HTML, CSS and JavaScript.
• Familiarity with JavaScript frameworks such as Angular JS, React and Amber.
• Proficiency with server side languages such as Python, Ruby, Java, PHP and .Net.
• Familiarity with database technology such as MySQL, Oracle and MongoDB.
• Excellent verbal communication skills.
• Good problem solving skills.
• Attention to detail.

• You will be part of a collaborative project team
• Will leverage several proprietary and standard tools to implement technical solutions.
• Responsible for understanding business requirements, providing estimation, developing solution, writing unit test scenarios and fixing defects for assigned applications.

• Substantial experience in building large complex and performant web applications using HTML5, CSS3, Typescript and Javascript across multiple browsers (Especially IE11).
• Experience in frameworks such as React (Redux, Redux Thunk or Saga, React Router, React Hooks) , Node JS and good understanding of the basics of these frameworks and their life cycles.(MUST HAVE)
• Experience in frameworks like Bootstrap and CSS pre-processors like SASS and LESS is desirable.
• Deeper understanding of network layer, HTTP, HTTPS, cookies, local storage.
• Knowledge to handle real-time async data would be a plus.
• Good knowledge on build tools like Webpack and Gulp
• Good knowledge on testing tools like Jest, Cypress, Jasmine, Karma, etc
• Experience in Git source control 
• Deeper understanding of Chrome Dev Tools.
• Deeper knowledge of UI optimizations and performance.
• Excellent communication skills, good visual design sense, in-depth experience in developing web-based applications.
• Experience leading multi engineer projects and mentoring junior engineers.
• Command an impressive portfolio of the latest UI technologies is a plus

We are looking for applicants with a strong background in Analytics and Data mining (Web, Social and Big data), Machine Learning and Pattern Recognition, Natural Language Processing and Computational Linguistics, Statistical Modelling and Inferencing, Information Retrieval, Large Scale Distributed Systems and Cloud Computing, Econometrics and Quantitative Marketing, Applied Game Theory and Mechanism Design, Operations Research and Optimization, Human Computer Interaction and Information Visualization. Applicants with a background in other quantitative areas are also encouraged to apply.

We are looking for someone who can create and implement AI solutions. If you have built a product like IBM WATSON in the past and not just used WATSON to build applications, this could be the perfect role for you.

All successful candidates are expected to dive deep into problem areas of Zycus’ interest and invent technology solutions to not only advance the current products, but also to generate new product options that can strategically advantage the organization.

Skills:

• Experience in predictive modelling and predictive software development
• Skilled in Java, C++, Perl/Python (or similar scripting language)
• Experience in using R, Matlab, or any other statistical software
• Experience in mentoring junior team members, and guiding them on machine learning and data modelling applications
• Strong communication and data presentation skills

• Classification (svm, decision tree, random forest, neural network)
• Regression (linear, polynomial, logistic, etc)
• Classical Optimization(gradient descent, newton raphson, etc)
• Graph theory (network analytics)
• Heuristic optimisation (genetic algorithm, swarm theory)
• Deep learning (lstm, convolutional nn, recurrent nn)

Must Have:

• Experience: 3-9 years
• The ideal candidate must have proven expertise in Artificial Intelligence (including deep learning algorithms), Machine Learning and/or NLP
• The candidate must also have expertise in programming traditional machine learning algorithms, algorithm design & usage
• Preferred experience with large data sets & distributed computing in Hadoop ecosystem
• Fluency with databases