Blockchain Developer at KoinBX · Madurai · 3 - 5 years · ₹4L - ₹7L / yr · Profitable · Posted 8 Jan 2025

- Bachelor’s degree in Computer Science, Engineering, or related field.
- 3-5 years of professional experience in web development with a strong focus on JavaScript stack technologies.
- Proven experience in integrating blockchain technology into web applications, with a deep understanding of blockchain protocols, smart contracts, and decentralized applications (dApps).
- Proficiency in multisignature, multiparty computation and 3rd party Node provider integration
- Experience with public blockchain platforms such as Bitcoin, Ethereum, etc.
- Solid understanding of RESTful APIs and web services.
- Strong problem-solving skills and the ability to troubleshoot complex issues.
- Excellent communication and collaboration skills.
- Ability to thrive in a fast-paced, agile environment and adapt to changing priorities.
- Experience with continuous integration and deployment (CI/CD) pipelines is a plus.
- Experience in setting up Bitcoin core, and Geth node is a plus

About KoinBX
About
KoinBX is India's most trusted and fastest-growing crypto exchange, dedicated to providing a secure, compliant, and user-friendly platform for crypto enthusiasts and traders across India. As the most trusted and fastest-growing crypto exchange, KoinBX is your gateway to the future of finance, with a user-centric approach, advanced security measures, and an extensive array of cryptos. Our vision is to be the cornerstone of a future where every individual, regardless of background, discovers and harnesses the boundless opportunities of digital assets. KoinBX opens the doors to a future where digital assets play a transformative role in shaping the financial landscape. Our mission is to empower traders by offering a secure and trusted crypto trading platform that is easily accessible to all. We promise to be the gateway ushering in a future of limitless financial possibilities in the realm of digital assets. We provide advanced tools and confidence to navigate the Indian crypto market. We are proud to be 100% compliant with Indian regulations, safeguarding users' funds through robust security measures, including advanced encryption techniques and multi-factor authentication. With over 120 listed cryptos and 150+ active trading pairs, including cryptos like Bitcoin, Ethereum, and Ripple, we provide a comprehensive platform with an intuitive interface, real-time portfolio tracking, and timely price alerts for informed trading decisions. At KoinBX, we offer a wide suite of features designed to meet the diverse needs of both beginner and experienced traders. From instant KYC authentication to low trading fees and high liquidity, our platform is equipped with everything you need to trade cryptos. Join the 5 million+ strong crypto community on KoinBX and begin your crypto journey today. Whether you're a seasoned trader or just getting started, KoinBX is your trusted partner for all your cryptocurrency trading needs.
Candid answers by the company
KoinBX is your gateway to the future of finance, with a user-centric approach, advanced security measures, and an extensive array of cryptos.
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Senior Blockchain Developer
Location: India, Remote
Employment Type: Full-Time / Contract
Department: Engineering
About Us
OpenAssets is building open standards for the next generation of capital markets, providing the trusted foundation for real-world asset tokenization and digital currencies.
We specialize in alternative asset digitization, offering regulatory-conscious tools to design, issue, and manage digital assets in complex financial environments. We also develop loyalty solutions that turn customer engagement into programmable digital assets, helping brands create personalized experiences that drive growth.
OpenAssets operates at the intersection of finance, technology, and regulation focused on building secure, scalable, and open infrastructure for the future of digital markets. Join OpenAssets and be part of shaping the future of digital finance!
Overview
We are seeking a Blockchain Developer to lead the technical implementation of our Web3 infrastructure. In this role, you will be responsible for the end-to-end lifecycle of smart contracts and their integration into our broader financial ecosystem. You will act as a technical authority on blockchain security, scalability, and architecture, ensuring our platform meets the rigorous demands of institutional digital finance.
What You’ll Do
Smart Contract & Blockchain Development
- Design, develop, test, and deploy smart contracts and blockchain applications.
- Build and maintain secure, scalable backend services for blockchain products.
- Develop and maintain cross-platform applications that integrate with on-chain infrastructure.
- Integrate wallets, payment systems, and blockchain APIs with existing systems.
- Optimize for gas efficiency, transaction latency, reliability, and scalability.
Security & Quality
- Implement and uphold best practices for blockchain security and smart contract auditing.
- Review smart contracts and backend code for security vulnerabilities and performance issues.
- Support audits, security reviews, and production releases.
- Maintain high test coverage and disciplined release processes.
Collaboration & Communication
- Collaborate with product and engineering teams to define and deliver technical requirements.
- Communicate technical concepts clearly to both technical and non-technical stakeholders.
- Mentor junior engineers and contribute to a strong engineering culture.
- Stay current with emerging blockchain technologies, DeFi, and Web3 infrastructure trends.
Qualifications & Experience
- Experience: 3+ years of software engineering experience with at least 3+ years of hands-on blockchain/Web3 development.
- Blockchain Core: Strong experience with Solidity and EVM-compatible chains (Ethereum, Polygon, and others).
- Production Deployment: Proven track record building, testing, deploying, and maintaining smart contracts in production.
- Deep Technical Knowledge: Solid understanding of blockchain architecture, including consensus mechanisms, gas optimization, wallet flows, token standards, and transaction lifecycles.
- Full-Stack Proficiency: Good understanding of the MERN stack (MongoDB, Express.js, React, Node.js) and how full-stack applications integrate with blockchain infrastructure.
- Backend Expertise: Proficiency in Node.js and TypeScript with experience building RESTful backend applications.
- Testing & Tooling: Experience with smart contract and backend testing frameworks (e.g., Foundry, Hardhat, Mocha, Jest) and Web3 libraries like Ethers.js or Web3.js.
- Cloud Infrastructure: Hands-on experience with AWS, including deploying, managing, and scaling services like EC2, S3, Lambda, and RDS.
- Databases & DevOps: Comfortable with relational (PostgreSQL) and non-relational (MongoDB) databases, Git, and collaborative development workflows.
- Soft Skills: Strong communication skills in English with the ability to articulate technical concepts to diverse stakeholders.
Nice to Have
- Familiarity with the Move language (Sui, Aptos).
- Experience with smart contract audit tooling such as Slither, Mythril, or Manticore.
- Exposure to RWA tokenization, DeFi, stablecoins, NFTs, staking, or bridging protocols.
- Professional background in fintech, payments, or regulated blockchain use cases.
We are committed to providing equal opportunity for qualified applicants to contract positions, regardless of race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status. This is a contract opportunity, not a direct employment role.
We’re Hiring: Associate Software Developer
Rogue Pixxel is hiring an Associate Software Developer for a long-term product development role in the education technology / institutional ERP space.
This is a good opportunity for someone who wants to work on a serious real-world software product, learn product development deeply, and grow with ownership.
Position Details
Role: Associate Software Developer
CTC: UPTO ₹3.6 LPA
Type: Full-time
Location: Ashok Nagar, Ranchi, Jharkhand
Experience: 3-5 years experience preferred
What You’ll Work On
You will work on web-based product features related to institutional operations such as:
Student and user workflows
Attendance and academic modules
Fee and finance-related workflows
Dashboards and reports
Communication and notification flows
Admin panels and role-based interfaces
Responsibilities
Develop, improve, and maintain product features
Work on frontend and/or backend tasks
Debug issues and improve product stability
Write clean, readable, and maintainable code
Collaborate with the team on product requirements
Take ownership of assigned work and deliver consistently
Required Skills
Good understanding of web development fundamentals
Basic knowledge of frontend or backend development
Understanding of APIs, databases, and Git
Logical problem-solving ability
Willingness to learn and improve continuously
Responsible attitude and consistency
Preferred Skills
React / Next.js
Node.js / NestJS
PostgreSQL / MySQL
REST APIs
Git
SaaS product exposure is a plus
Who Should Apply
This role is suitable for:
Strong freshers with good project experience
Developers with 3-5 Years of experience
Candidates who want to grow in product development
Developers who prefer long-term ownership over short-term project work
Growth Opportunity
This is a product-focused role with learning, responsibility, and growth opportunities. Performance-based growth review will be considered after the initial period based on ownership, consistency, and delivery quality.
UniAbroad is a fast-growing platform helping students explore global education opportunities and connect with institutions worldwide. We aim to simplify the study abroad journey through technology-driven solutions.
Key Responsibilities
- Design, develop, and maintain web applications and platforms
- Write clean, scalable, and efficient code
- Collaborate with product, design, and hiring support teams
- Integrate APIs and third-party services
- Troubleshoot, debug, and upgrade existing systems
- Ensure performance, security, and responsiveness of applications
Required Skills
- Strong knowledge of JavaScript, Python, or Java
- Experience with React / Node.js / Django / Laravel
- Understanding of databases (MySQL, MongoDB)
- Familiarity with Git and version control
- Basic understanding of REST APIs
- Good problem-solving and analytical skills
1–3 years of experience in software development
Experience working in a startup environment
Knowledge of cloud platforms (AWS, Azure, or GCP)
Possibility of growth opportunity in dubai






