Blockchain Developer

About the Job

Blockchain Developer (Mid-Level)

Experience: 1–7 Years

Salary: Competitive

Preferred Notice Period: Immediate to 30 Days

Opportunity Type: Remote (Global)

Placement Type: Freelance/Contract

(Note: This is a requirement for one of TalentLo’s Clients)

Role Overview

We’re seeking skilled Blockchain Developers with 1–7 years of experience to build decentralized applications (dApps), smart contracts, and scalable blockchain solutions for global clients.

Responsibilities

• Design and develop smart contracts and decentralized applications
• Build and maintain blockchain protocols and architectures
• Optimize code for performance, scalability, and security
• Integrate blockchain solutions with existing applications and APIs
• Conduct research on emerging blockchain frameworks, tools, and trends
• Collaborate with product managers and clients to define blockchain use cases
• Perform testing, debugging, and audits of smart contracts and blockchain code

Requirements

• Strong proficiency in Solidity (Ethereum), Rust, or Go for blockchain development
• Experience with blockchain platforms (Ethereum, Hyperledger, Polygon, or similar)
• Knowledge of smart contract security and best practices
• Familiarity with cryptography, consensus algorithms, and token standards (ERC-20, ERC-721, etc.)
• Hands-on experience with Web3.js, ethers.js, or similar libraries
• Proficiency with version control (Git) and collaborative development workflows
• Understanding of dApp architecture, APIs, and blockchain integration

How to Apply

1. Create your profile on TalentLo’s platform → https://www.talentlo.com/signup
2. Submit your GitHub, portfolio, or sample projects
3. Take the required assessment and get qualified
4. Get shortlisted & connect with the client

About TalentLo

TalentLo is a revolutionary talent platform connecting exceptional tech professionals with high-quality clients worldwide. We’re building a carefully curated pool of skilled experts to match with companies actively seeking specialized talent for impactful projects.

✨ If you’re ready to work on cutting-edge blockchain projects, collaborate with global teams, and grow your career — apply today!

Experience: Minimum 5 years in blockchain development

Blockchain Networks: Hyperledger Fabric, Stellar, Solana

Key Skills:

Proficiency in Golang with a minimum of 4 years of experience

Strong understanding of cryptography, resource optimization, and data clustering

Hands-on experience with NoSQL databases (CouchDB, Cassandra, or DynamoDB preferred)

Familiarity with CI/CD tools and processes (Docker, Kubernetes, Jenkins, GIT)

Project Knowledge:

Crypto Exchange platforms

Smart Contract Development

Tokenization and NFT projects

Key Responsibilities:

Design and develop blockchain-based solutions aligned with business needs

Develop and optimize smart contracts and decentralized applications

Collaborate with cross-functional teams to deliver high-quality solutions

Implement and ensure security best practices across blockchain solutions

Analyze and enhance blockchain network performance.

Responsibilities:

1. Collaborate with stakeholders to understand business objectives, processes, and requirements.
2. Conduct thorough analysis of business processes, workflows, and systems to identify areas for improvement.
3. Gather, document, and prioritize business requirements using techniques such as interviews, workshops, and surveys.
4. Analyze data to identify trends, patterns, and insights that can inform decision-making and drive business outcomes.
5. Develop and maintain documentation, including business process models, use cases, user stories, and requirements specifications.
6. Work closely with cross-functional teams to ensure alignment between business needs and technical solutions.
7. Facilitate meetings, workshops, and presentations to communicate findings, solicit feedback, and drive consensus among stakeholders.
8. Collaborate with developers, designers, and QA analysts to ensure successful implementation and testing of solutions.
9. Monitor and evaluate the performance of implemented solutions, and recommend adjustments or enhancements as needed.
10. Stay updated on industry trends, best practices, and emerging technologies related to business analysis and process improvement.

Requirements:

1. Bachelor's degree in Business Administration, Management Information Systems, or related field.
2. Proven experience as a Business Analyst or similar role.
3. Strong analytical skills, with the ability to gather and interpret data from multiple sources.
4. Proficiency in business analysis techniques, such as process modeling, data analysis, and requirements elicitation.
5. Excellent communication skills, including the ability to effectively communicate technical concepts to non-technical stakeholders.
6. Solid understanding of project management principles and methodologies.
7. Experience with business analysis tools and software (e.g., Microsoft Visio, Jira, Confluence) is a plus.
8. Ability to work independently and collaboratively in a fast-paced environment.
9. Strong organizational skills and attention to detail.
10. Certification in business analysis (e.g., CBAP, PMI-PBA) is preferred but not required.

Job Position - BlockChain Developer

Experience - 4+ Years

Job Location - Bangalore

Responsibilities:

• Search, design, develop, and test blockchain technologies.

• Brainstorm and help evaluate applications for new tools and technologies as they continually evolve.

• Maintain and extend current client- and server-side applications responsible for integration and business logic.

• Be involved in the global blockchain community—work on implementing and integrating the latest improvement proposals.

• Document new solutions as well as maintain the existing ones.

Requirements:

• Total 4+ Years of experience in Backend Development and minimum 1+ years of experience in Ethereum, Blockchain

• Knowledge of any one of the programming languages: NodeJS, Java, GoLang, C, C++, PHP

• Basic understanding of blockchain technology: Bitcoin, Smart Contracts, Solidity, Cryptography

• Knowledge of private blockchains such as Hyper Ledger, and Corda is a plus

• Basic understanding of HTML, CSS, JS, Bootstrap, and knowledge of front-end technologies such as Angular/ React/ Vue is a plus.

• Knowledge in databases and database modeling: MySQL, PostgreSQL, MongoDB

• Understanding of Software Development Lifecycle (SDLC)

• Experience using Git for version control

Technical Experience 

• Solid understanding of and experience in BlockChain Development preferred 
• 2+ years of Blockchain application development experience on platforms such as Ethereum, Hyperledger, BigchainDb, Multi-Chain.  
• Experience in solution building on Blockchain technology.  
• Experience on development tools such as Geth, Hyperledger Fabric/Sawtooth, Composer, Solidity Remix Functional  
• Basic understanding of Web applications architecture and protocols. 
• Any additional expertise with Python, containerization (Docker) and additional Cloud exposure also a huge plus
• Any previous integration expertise, Strong in Agile, Banking or Financial Service development expertise, as well as software development in a large Enterprise environment, also required Security Architecture / Cryptography
• Front-end development experience in HTML, CSS, JavaScript, ES6/TypeScript Angular, Node.js, ReactJS . 

We are looking for a Blockchain Developer who has around 2-3 years of experience, and has past experience with working on blockchain-based systems and scenarios. The ideal candidate would be someone who understands the concepts of Blockchain technology and having working experience on Rust and Solana.

• Desire to work in a startup environment, fun@work culture and able to self-manage.

• In Depth understanding of at-least two blockchain network like Rust, Substrate, Polkadot Solana, Hedera Hashgraph, Tezos, BlockApps, Algorand, Corda, Lambda, Cargo etc

• Familiarity with basic cryptography to understand the essentials of blockchain systems.

• Hands on in Rust

• Designing and writing well-structured APIs in Node.js and MongoDb to connect to Blockchain infrastructure

• Staying up to date with new developments and news in integrated chains.

• Past experience with Wallets or Crypto Exchanges would be a major plus.

• Experience with third-party libraries and APIs.

• Experience working in an agile development process.

• Documenting architecture and guidelines.

• Be proficient in using version control and continuous integration, with tools such as Gitlab, Git and Jenkins.

• Write clear, maintainable and testable code that you are proud of.

• Attend training and education where necessary to up-skill themselves.

• Experience in writing smart contracts for large-scale production blockchain applications.

• Cross-team contribution whenever required.

• Familiarity with basic cryptography.

• Should have a deep understanding of the blockchain and cryptocurrency space and smart contract systems, specifically having a deep understanding of Rust.

Responsibilities:-

Ø  Research, design, develop, and test blockchain technologies.

Ø  Brainstorm and help evaluate applications for new tools and technologies as they continually evolve.

Ø  Maintain and extend current client- and server-side applications responsible for integration and business logic.

Ø  Be involved in the global blockchain community—work on implementing and integrating the latest improvement proposals.

Ø  Document new solutions as well as maintaining that of existing ones.

Skills:-

Ø  Strong  software development background.

Ø  Experience working with large codebases.

Ø  Experience working with open-source projects.

Ø  Proficiency in one of the following languages: C++, Java, JavaScript ( Depending on the project ).

Ø  Strong  knowledge of common algorithms and data structures.

Ø  Familiarity with basic  cryptography.

Ø  Familiarity with P2P networks.

Ø  Strong knowledge of bitcoin-like blockchains.

Ø  Strong knowledge of concurrency and writing efficient and safe multithreaded code.

Ø  Strong knowledge of STL, C++11 ( In the case of a blockchain-based on C++ ).

Ø  Proficiency in the Qt Widgets module ( Applies to projects where a GUI wallet application is needed ).

About Mastercard

We are the global technology company behind the world’s fastest payments processing network.

We are a vehicle for commerce, a connection to financial systems for the previously excluded, a technology innovation lab, and the home of Priceless.

We ensure every employee has the opportunity to be a part of something bigger and to change lives.

We believe as our company grows, so should you.

We believe in connecting everyone to endless, priceless possibilities.

Overview Services and Data is helping to shape the future of data insights by leveraging billions of anonymized, aggregated transactions in a 10 petabyte date warehouse to help financial institutions, merchants, media, and governments manage their businesses more effectively.

Advanced Analytics is charged with servicing clients by centralizing and optimizing the world class analytical, modeling, software coding, data sourcing, product development, product management, econometrics, and associated delivery capabilities of the MasterCard Advisors organization.

It focuses on creating innovative technology solutions which leverage technology in the data science, artificial intelligence and analytics arenas; on enabling the field with industrialized, repeatable products and on researching and incubating emerging technology to determine how they might apply to our customers and facilitate positive outcomes.

What we are re looking for

• Are you motivated by developing new Analytical skills, leading to insights into issues and developing recommendations that add real value to clients?
• Have you managed the client independently and effectively?
• Do you want to play a key role in driving a world beyond cash?
• Leading the formulation of artificial intelligence and machine learning solution objectives. Working on technical requirements based on user need.
• Responsible for creating the framework of solutions that take data intensive and complex business challenges and provide easily consumed and automated outcomes
• Using unique visualization techniques, condenses large volumes of complex ideas into elegant and simple visual models
• Determine opportunities to exploit new data sources or leverage new outcomes from existing data sources, by applying new models and algorithms to create business value
• Influences a client's strategic decisions by using deep industry expertise and deploying innovative Deep Learning analytics solutions in the operational systems Leadership Skills
• Works closely with clients/internal stakeholders to understand their business needs and design a technical solution
• Proving viability of the solution through mechanisms like proof-of-concepts
• Thought Leadership in AI – Developing compelling audience-specific messages and tools. Capture and share best practices and insights internally and with partners and customers.
• Self-driven, energetic, creative with ability to work in global teams.
• Excellent communication skills and a wide knowledge base, to convince the Stakeholders on application of AI/ML
• Provide technical leadership to the team members in relevant topics on AI/ML
• Adaptable - Takes in stride and constantly attunes to the changing needs of a highly dynamic business
• Curious - our key contributors are always seeking to grow their knowledge, to gain new perspectives, and to find better ways forward by researching and showcasing latest AI tools, techniques and applications
• Tenacious - self-starters who will take ownership of projects and bring them to completion despite difficulties or setbacks
• Consulting and Project Management Experience preferred

Functional and Technical Skills

• Experience in building and implementing AI application in any of the two domains - Fraud, risk, marketing, finance, operations for Banks, Fintech, Ecommerce, merchants or retailers
• Has a deep understanding of business value industry requirements and advanced analytic models (statistical, operations research, computing process)
• Responsible for building applications using artificial intelligence/machine learning technology, applying latest industrial and academic developments, prefer Kaggle hackathon participant
• Expertise in deep learning frameworks for Production Systems like Tensorflow, Keras (for RPD and neural net architecture evaluation), PyTorch and Xgboost, Caffe, Theono
• Proficient in Deep Learning algorithm techniques like Random Forest, GBM, KNN, SVM, Bayesian, Text Mining techniques, Multilayer Perceptron, Neural Networks – Feedforward, CNN, LSTM’s GRU’s.
• Optimization techniques – Activity regularization (L1 and L2), Adam, Adagrad, Adadelta concepts; Cost Functions in Neural Nets – Contrastive Loss, Hinge Loss, Binary Cross entropy, Categorical Cross entropy; developed applications in KRR, NLP, Speech and Image processing
• Expertise in classical Machine Learning algorithms like Logistic Regression, Decision trees, Clustering (K-means, Hierarchical and Self-organizing Maps), TSNE, PCA, Bayesian models, Time Series ARIMA/ARMA, Recommender Systems - Collaborative Filtering, FPMC, FISM, Fossil etc
• Extensive experience in statistical tools and programming environments like Python, R, SAS, SQL
• Experience with BIG DATA platforms - Hadoop, Hive, Spark, GPU Clusters for deep learning

Qualifications

• Minimum Graduate degree in Mathematics/Computer Science/Engineering