Smart Contract Engineer
Hoasen, a remote-first development and product studio based in Ho Chi Minh City, Vietnam, is seeking a Junior to Mid-Level Smart Contract Engineer to develop cutting-edge blockchain applications. This full-time remote role offers flexible working hours, preferably for candidates located between UTC+3 and UTC+10. The engineer will work across multiple fintech and Web3 projects, building and maintaining decentralized applications and smart contracts, primarily for Ethereum and other EVM-compatible chains. Hoasen offers an engaging developer culture, along with a profit-sharing program, annual trip, and education stipend as part of its benefits.
Ideal candidates should have at least 1+ year of experience with Solidity, be proficient in Ethereum smart contract development, and familiar with OpenZeppelin, contract upgradability patterns, and secure coding practices. Familiarity with Layer 2 solutions like Optimism and Arbitrum, off-chain storage technologies (e.g., IPFS, The Graph), and additional exposure to Rust is preferred. Strong English communication skills are required, and Vietnamese language proficiency is a plus. The position also encourages contributions to open-source projects and offers coaching and mentorship from senior engineers.
Working at Hoasen means joining a fast-moving, passionate team that values transparency, learning, and innovation. With a strong focus on mentoring and growth opportunities, this role is ideal for developers eager to accelerate their careers while working across diverse blockchain projects in a supportive, no-bureaucracy environment.
Job Title: Solidity/EVM Developer
Location: Remote (Flexible Hours), Preferred Between UTC+3 and UTC +10 time zones.
Level: Junior to Mid Level
Position Overview:
We are seeking a Junior Solidity Developer to join our innovative team. This full-time, remote position offers flexible hours and the chance to work with modern blockchain technologies in the fintech space on a variety of projects across different industries.
Qualifications:
- Proficient in Solidity with experience in Ethereum smart contracts.
- Knowledgeable in OpenZeppelin security standards and library usage.
- Understands the nuances between coding for Ethereum and other EVM-compatible chains.
- Familiar with different approaches to upgradable smart contracts.
- Capable of designing, implementing, and deploying smart contracts that meet rigorous audit requirements.
- Skilled in writing highly readable, optimized, and secure code, supported by a comprehensive test suite.
- Experience +1 year
- Proficient in English
Preferred Skills:
- Familiar with Solidity language, and preferably have some understanding of Rust.
- Familiarity with off-chain storage solutions and integrations (IPFS, The Graph).
- Understanding of Layer 2 scaling solutions (e.g., Optimism, Arbitrum).
- Contributions to open-source blockchain projects.
- Prior experience in a fintech environment.
- Vietnamese Language
Key Responsibilities:
- Design, develop, test, and deploy smart contracts on blockchain platforms such as Ethereum, Base, or Solana.
- Collaborate with the development team to create and implement decentralized applications (DApps).
- Write high-quality, secure, and sustainable code for blockchain applications.
- Perform code reviews and provide constructive feedback to peers.
- Maintain and optimize existing blockchain applications and smart contracts.
- Work closely with project managers and other stakeholders to define and achieve project goals.
- Stay updated with the latest blockchain technologies and cryptographic methods.
- Contribute to the architecture and design decisions for blockchain systems.
Benefits
- Profit sharing program
- Annual company trip
- Education and learning stipend
About Us
Hoasen is a development and product studio focused on delivering world class products working with startups across the world. We love what we do and are passionate about building technology. Our team is made up of highly competent, talented, and honest individuals where we work on shared trust and accountability - no bureaucracy or nonsense.
Why Us?
We will help you grow in your career and expose you to many startups and projects allowing you to get to know yourself and also build your network. You will be coached and mentored by senior Engineers.
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