67 Blockchain jobs in Singapore

Principal Blockchain Engineer/Blockchain Architect (Solana)
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Principal Blockchain Engineer/Blockchain Architect (Solana)
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Reap
Principal Blockchain Engineer/Blockchain Architect (Solana)
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Join to apply for the
Principal Blockchain Engineer/Blockchain Architect (Solana)
role at
Reap
About Reap
Reap is a global financial technology company headquartered in Hong Kong with employees across multiple countries. We enable financial connectivity and access for businesses worldwide by combining traditional finance with stablecoins for efficient money movement.
About Reap
Reap is a global financial technology company headquartered in Hong Kong with employees across multiple countries. We enable financial connectivity and access for businesses worldwide by combining traditional finance with stablecoins for efficient money movement.
Through our stablecoin-powered corporate cards, payments, and expense management tools, we streamline financial operations and help businesses scale. Our APIs enable businesses to integrate stablecoin-enabled finance into their own products and services—from issuing Visa cards to facilitating cross-border payments.
Backed by leading investors including Index Ventures and HashKey Capital, Reap is building the future of borderless, stablecoin-enabled finance.
About The Role
Reap is looking for a Principal Blockchain Engineer/Blockchain Architect to lead the development of cutting-edge on-chain asset management infrastructure at Reap. This is a unique opportunity to build novel governance and asset management mechanisms on Solana, while leveraging Reap's established presence in the financial technology space. You'll be joining a forward-thinking team at the intersection of traditional finance and blockchain technology, working to reshape how organizations secure and manage their digital assets.
What you’ll do
As the technical lead for our on-chain multisig platform, you'll play a key role in defining the future of on-chain asset management on Solana.
Solana Contract Development: Design, implement, and deploy high-performance, production-grade smart contracts on the Solana blockchain, with a focus on multisig infrastructure, transaction execution, and advanced features like time locks, spending limits, and role-based permissions.
Smart Account Architecture: Build and iterate on core on-chain components including proposal systems, voting mechanisms, asset management protocols, and cross-program integration capabilities that enable composability across the Solana ecosystem.
Cross-functional Systems Design: Work closely with product, finance, and ops to translate real-world fund flows into on-chain execution logic. Ensure alignment between protocol behavior and user experience across the stack.
Qualifications
Minimum Requirements:
Minimum of 5 years in software development, with at least 2 years of experience in building smart contracts on Solana with Rust.
Proven experience in building and supporting production Solana programs that have handled sizable funds.
Strong understanding of smart accounts, digital asset management and multi-sig architecture.
Demonstrated ability to design and reason about complex state machines, proposal logic, and secure transaction orchestration.
Highly motivated, self-driven, and passionate about building cutting-edge blockchain protocols.
Peer collaboration and code quality: Maintains a high standard for code quality, reliability, and peer review. Demonstrates strong communication skills, challenges ideas respectfully, and actively contributes to raising the technical bar across the team.
Fluency in English both in spoken and written forms.
Technical Stack
Backend: Rust , Anchor framework, TypeScript/Rust SDK development, Solana CLI tools
Infrastructure: TypeScript, Node.js, CI/CD pipelines, AWS
Web3: Multisig protocols, SPL token standards, asset management systems, Solana DeFi integrations
Preferred Qualifications
Experience with Ethereum smart contract development (Solidity), ERC-4337 account abstraction standards and cross-chain protocol design
AI fluency: You embrace using AI tools to accelerate development and explore ideas, but you apply them with discernment, not as a replacement. You know when to trust outputs and when to go deeper
Security Mindset: Experience applying secure software development practices, threat modeling, and understanding of common smart contract vulnerabilities
Why Join Us
DeFi Natives:
Be at the forefront of financial innovation where traditional finance meets Web3. Work directly with major blockchains including Solana and Ethereum as we continue to expand our multi-chain capabilities.
Global Impact:
Your code will power solutions used by hundreds of businesses internationally, handling significant transaction volumes across multiple blockchains.
Backed by Top Investors:
Join a company supported by renowned investors including Index Ventures and Hashkey Capital.
Global Team:
Collaborate with talented professionals across multiple countries, with flexible hybrid work options that prioritize results over location.
After submitting your application, please check your inbox for a confirmation email. If you don't see it, kindly check your spam or junk folder and adjust your settings to ensure future communication reaches your inbox. You can follow the steps here.
Seniority level
Seniority level Mid-Senior level
Employment type
Employment type Contract
Job function
Job function Engineering and Information Technology
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About the Role

We are seeking a skilled Blockchain Developer to join our team and contribute to the design, development, and deployment of blockchain-based solutions. You will be responsible for building smart contracts, decentralized applications (dApps), and blockchain infrastructure that align with business requirements.

Key Responsibilities

• Design, develop, and implement smart contracts and decentralized applications (dApps).

• Build and maintain blockchain protocols, consensus mechanisms, and APIs.

• Write secure, efficient, and clean code for blockchain integrations.

• Collaborate with product, engineering, and research teams to design scalable blockchain solutions.

• Conduct security audits and testing of smart contracts and blockchain systems.

• Stay updated on industry trends, emerging technologies, and best practices in blockchain development.

• Optimize existing blockchain applications for performance, scalability, and reliability.

Requirements

• Bachelor's degree in Computer Science, Engineering, or a related field (or equivalent experience).

• Strong programming skills in languages such as Solidity, Go, Rust, JavaScript/TypeScript, or Python.

• Hands-on experience with blockchain platforms.

• Understanding of cryptographic principles, data structures, and distributed systems.

• Experience with smart contract development, testing, and deployment tools

• Familiarity with web3 frameworks and libraries

• Knowledge of security best practices in blockchain development.

We are hiring for one of our ecosystem projects in the digital asset space, we are looking for a Blockchain Developer to design, develop, and implement blockchain-based solutions for a high-performance trading system. The ideal candidate will have expertise in blockchain technologies, smart contract development, and trading system architecture, ensuring secure, scalable, and efficient solutions for decentralized trading applications.

Job Description

• Design and develop blockchain-based trading platforms, including decentralized exchanges (DEX), automated market makers (AMM), or order-book systems.
• Write, test, and deploy secure smart contracts using platforms such as Ethereum, Binance Smart Chain, Solana, or other blockchain networks.
• Integrate blockchain solutions with front-end and back-end systems to enable seamless trading functionality.
• Implement security best practices to protect against vulnerabilities, including reentrancy attacks, front-running, and unauthorized access.
• Optimize smart contracts for gas efficiency and system performance to handle high-frequency trading scenarios.
• Collaborate with cross-functional teams, including traders, product managers, and DevOps engineers, to define system requirements and ensure alignment with business goals.
• Ensure compliance with relevant financial regulations and standards for trading systems.
• Monitor and maintain blockchain nodes, ensuring uptime and reliability of the trading infrastructure.
• Stay updated on emerging blockchain technologies, protocols, and industry trends to enhance system capabilities.

Qualifications

• Bachelor's degree in Computer Science, Engineering, or a related field (or equivalent experience).
• 3+ years of experience in blockchain development, with a focus on building decentralized applications (dApps) or trading systems.
• Proficiency in programming languages such as Solidity, Rust, or Go for smart contract development.
• Strong understanding of blockchain protocols (e.g., Ethereum, Solana, Polygon) and consensus mechanisms (e.g., PoW, PoS).
• Experience with trading system concepts, including order matching, liquidity pools, or market-making algorithms.
• Familiarity with DeFi protocols, token standards (e.g., ERC-20, ERC-721), and interoperability frameworks.
• Knowledge of cryptographic principles, including public/private key infrastructure and hashing algorithms.
• Experience with tools like Truffle, Hardhat, or Foundry for smart contract development and testing.
• Understanding of front-end and back-end integration (e.g., , , REST APIs).
• Strong problem-solving skills and attention to detail in writing secure and efficient code.
• Excellent communication and collaboration skills to work in a fast-paced, team-oriented environment.

Nice To Have

• Experience with layer-2 scaling solutions (e.g., Optimism, Arbitrum) or cross-chain bridges.
• Knowledge of financial markets, trading strategies, or algorithmic trading.
• Familiarity with cloud platforms (e.g., AWS, Azure) and containerization (e.g., Docker, Kubernetes).
• Contributions to open-source blockchain projects or active participation in blockchain communities.
• Understanding of regulatory frameworks for cryptocurrencies and trading platforms (e.g., KYC/AML compliance).

About Magent

Magent, a Reap Company, is redefining how crypto natives and hybrid users spend and earn by bridging decentralized finance (DeFi) with real world transactions. Unlike traditional crypto cards, Magent doesn't just enable spending, we allow for idle crypto assets to work for users through automated DeFi earnings. By partnering with wallets and DeFi protocols, Magent creates a low risk, high utility financial experience, bringing true DeFi powered financial freedom to a global audience. This is a chance to join early and play a key role in shaping the future of Magent.

The Role

As a key member of the Magent team, you'll be designing and maintaining smart contracts on Solana and working closely with backend systems ) as core parts to the role. You'll optimize for reliability, security, and scalability. Cross chain experience (e.g., token bridges, interoperability protocols) is a plus, as we aim to expand blockchain support beyond Solana.

This role is ideal for someone who is also commercially minded and understands how technical decisions can affect the user experience and business model.

What You'll Do

• Develop and maintain Solana programs in Rust that support existing product features and DeFi integrations in addition to future product builds.
• Build and optimize backend services ) to support on-chain integrations.
• Collaborate with the product team to translate business logic into secure, on chain functionality and new experiences.
• Participate in architecture decisions, especially for cross-chain expansion and scalability.
• Contribute to code reviews, audits, and performance optimization.

What We're Looking For

• Lateral thinker/problem solver who thrives in positions of autonomy and who is looking to take oversized ownership while getting their hands dirty in a start up environment.
• Strong proficiency in Rust and Solana program architecture.
• Strong Typescript and backend development experience.
• Understanding of blockchain engineering.
• Experience using and technical understanding of the Solana DeFi ecosystem.
• Ability to work in a lean, minimal-tooling environment.
• Bonus: cross-chain development experience, credit/finance systems or credit card industry knowledge.

Why Join Us

You'll be working directly with the co-founders on a high impact product from the ground up. Your work will directly power a crypto credit card product that merges DeFi and traditional payments. We're small, fast, and building something that the market hasn't seen; you'll be a core part of making it happen.

Job Responsibilities:
1.Design, develop, and deploy blockchain-related products, including smart contracts and decentralized applications (DApps).
2.Research and optimize the performance of mainstream public chains (e.g., Ethereum, EOS), consortium chains, or private chains.
3.Collaborate with teams to integrate blockchain technology with existing systems, ensuring data security and consistency.
4.Stay updated with blockchain technology trends and explore applications in token economies and decentralized finance (DeFi).
Job Requirements:
1.Bachelor's degree or higher in Mathematics, Computer Science, or a related field.
2.At least 1 years of blockchain development experience, with proficiency in Solidity, Rust, or Go.
3.Strong expertise in smart contract development and security auditing, with familiarity in tools like Truffle and Hardhat.
4.Knowledge of cryptographic principles (e.g., hashing, asymmetric encryption); experience with distributed systems is a plus.
5.Passion for the Web3.0 ecosystem; contributions to open-source projects or DApp cases are highly advantageous.

Blockchain Developer

Responsibilities

1.Design, develop, and deploy blockchain-related products, including smart contracts and decentralized applications (DApps).

2.Research and optimize the performance of mainstream public chains (e.g., Ethereum, EOS), consortium chains, or private chains.

3.Collaborate with teams to integrate blockchain technology with existing systems, ensuring data security and consistency.

4.Stay updated with blockchain technology trends and explore applications in token economies and decentralized finance (DeFi).

Qualifications

1.Bachelor's degree or higher in Mathematics, Computer Science, or a related field.

2.At least 2 years of blockchain development experience, with proficiency in Solidity, Rust, or Go.

3.Strong expertise in smart contract development and security auditing, with familiarity in tools like Truffle and Hardhat.

4.Knowledge of cryptographic principles (e.g., hashing, asymmetric encryption); experience with distributed systems is a plus.

5.Passion for the Web3.0 ecosystem; contributions to open-source projects or DApp cases are highly advantageous.

Blockchain Developer

Responsibilities

1.Design, develop, and deploy blockchain-related products, including smart contracts and decentralized applications (DApps).

2.Research and optimize the performance of mainstream public chains (e.g., Ethereum, EOS), consortium chains, or private chains.

3.Collaborate with teams to integrate blockchain technology with existing systems, ensuring data security and consistency.

4.Stay updated with blockchain technology trends and explore applications in token economies and decentralized finance (DeFi).

Qualifications

1.Bachelor's degree or higher in Mathematics, Computer Science, or a related field.

2.At least 2 years of blockchain development experience, with proficiency in Solidity, Rust, or Go.

3.Strong expertise in smart contract development and security auditing, with familiarity in tools like Truffle and Hardhat.

4.Knowledge of cryptographic principles (e.g., hashing, asymmetric encryption); experience with distributed systems is a plus.

5.Passion for the Web3.0 ecosystem; contributions to open-source projects or DApp cases are highly advantageous.

What we are building
Overmind’s mission is to enable more developers to enter web3, build ground-breaking products, and access rare opportunities. We believe that one of the biggest drags on crypto’s growth is the friction and uncertainty that developers face in the transition from web2 to web3.
Overmind makes it easy for everyone, regardless of what coding experience they have, to continue to learn, earn, and grow through a series of quests, and find their next role in web3. Overmind quests are designed in partnership with web3 companies hiring in collaboration with Overmind, including start-ups from within the Aptos ecosystem. Quests range in complexity, length, and subject matter, making learning web3 accessible for people at all stages of their development journey.
The Overmind is formed by the collective intelligence of those bold enough to join it. Enter at overmind.xyz.
Skills & Experience
Essential Requirements
1+ years of development experience
English working proficiency (written & oral)
Nice-to-haves
Experience with Solidity, Rust, or Move
Bachelors, advanced degree, boot camps, or other certifications in Computer Science or related subject
Please be advised that this job opening is for our partner companies. This is not a job listing for an internal role at Overmind. We are proud to connect some of the brightest minds, of all levels with our partners.
What happens if I apply?
An Overmind talent team member will review your application with the aim to reach out to you within 5 working days if we believe your profile will be of interest to our partners, to learn more about your current interests, skills, and career development goals so we can match you with our partners hiring on Overmind
Who we have helped?

• We have enabled thousands of developers to learn how to build on Move in partnership with Aptos and get connected to Aptos’ ecosystem hiring teams
• We are currently in the process of partnering with other industry-leading projects to help connect the new frontier of developers to exciting career opportunities
• We fast-track Overmind community members to connect with our partners who are currently hiring through warm introductions and up-skill them via Overmind quests
• Overmind developers have been supported in their efforts to win globally acclaimed hackathon competitions and prizes as well as launch their own applications

We welcome developers of all levels of coding experience who:
- Have a growing interest in the crypto/web3 space looking to transition their career into web3 or find their next web3 role
- Are not sure how to find a new role in web3 and are looking for a route in
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Blockchain Developer

Responsibilities

1.Design, develop, and deploy blockchain-related products, including smart contracts and decentralized applications (DApps).

2.Research and optimize the performance of mainstream public chains (e.g., Ethereum, EOS), consortium chains, or private chains.

3.Collaborate with teams to integrate blockchain technology with existing systems, ensuring data security and consistency.

4.Stay updated with blockchain technology trends and explore applications in token economies and decentralized finance (DeFi).

Qualifications

1.Bachelor’s degree or higher in Mathematics, Computer Science, or a related field.

2.At least 2 years of blockchain development experience, with proficiency in Solidity, Rust, or Go.

3.Strong expertise in smart contract development and security auditing, with familiarity in tools like Truffle and Hardhat.

4.Knowledge of cryptographic principles (e.g., hashing, asymmetric encryption); experience with distributed systems is a plus.

5.Passion for the Web3.0 ecosystem; contributions to open-source projects or DApp cases are highly advantageous.