Posted 2d ago
About the role
Design, build, and maintain decentralized applications, smart contracts, and blockchain infrastructure across EVM-compatible networks and the Solana ecosystem.
What We're Looking For
We are looking for a highly skilled Senior Web3 Engineer to join our growing engineering team. You will design, build, and maintain decentralized applications (dApps), smart contracts, and blockchain infrastructure across EVM-compatible networks and the Solana ecosystem.
This role requires a strong understanding of blockchain architecture, wallet integrations, smart contracts, backend services, and modern Web3 technologies. Experience integrating AI-powered features or LLM-based workflows into blockchain applications is a strong advantage.
The ideal candidate is a passionate builder who enjoys solving complex technical challenges, writes clean and maintainable code, communicates effectively in English, and can work independently in a fast-paced startup environment. We value engineers who continuously learn, embrace new technologies, and are excited about the convergence of Web3 and AI.
Working at Trexonium
- Remote-first team with autonomy to propose, lead, and ship meaningful blockchain initiatives.
- Collaborative engineering culture with architecture discussions, code reviews, and technical planning.
- Exposure to cutting-edge Web3 protocols, tooling, and the intersection of blockchain with AI.
- Support for professional growth through mentorship, open-source contributions, and conference learning.
- Fast-paced startup environment where builders can make outsized impact on product direction.
Responsibilities
- Design, develop, and maintain production-grade dApps across EVM-compatible chains and Solana.
- Build and optimize smart contracts using Solidity and Rust.
- Develop scalable backend services and APIs using Go and/or Java.
- Integrate wallets, RPC providers, indexers, bridges, and Web3 SDKs.
- Build secure on-chain/off-chain architectures and transaction workflows.
- Optimize application performance, security, and scalability.
- Collaborate with frontend developers to deliver seamless Web3 user experiences.
- Participate in architecture discussions, code reviews, and technical planning.
- Stay current with emerging blockchain technologies, protocols, and AI advancements.
Requirements
- Excellent written and spoken English.
- 5+ years of professional software development experience.
- 3+ years of hands-on blockchain/Web3 development.
- Strong experience building production dApps on Ethereum and other EVM-compatible chains.
- Strong experience developing on the Solana network.
- Proficiency in Solidity and Rust.
- Good knowledge of Go (Golang) and/or Java.
- Experience integrating wallets such as MetaMask, WalletConnect, Phantom, and embedded wallets.
- Deep understanding of blockchain fundamentals, transactions, gas optimization, account models, token standards, and DeFi protocols.
- Experience with Web3 libraries such as ethers.js, viem, web3.js, wagmi, Anchor, or similar.
- Familiarity with backend development, REST/gRPC APIs, databases, and cloud infrastructure.
- Strong debugging, problem-solving, and communication skills.
Preferred Qualifications
- Experience integrating AI/LLM services (OpenAI, Anthropic, Gemini, LangChain, MCP, AI agents, etc.) into production applications.
- Experience building AI-powered blockchain tools, autonomous agents, or natural language interfaces.
- Knowledge of account abstraction, cross-chain protocols, bridges, and interoperability.
- Experience with DeFi, NFTs, token launchpads, staking, DEXs, prediction markets, or gaming.
- Experience with Docker, Kubernetes, CI/CD, and cloud platforms (AWS, GCP, Azure).
- Contributions to open-source blockchain projects.
- Experience with Layer 2 networks (Base, Arbitrum, Optimism, Polygon, zkSync, etc.).
- Experience with blockchain indexing, event processing, and analytics.
- Smart contract security knowledge and auditing experience.
- Experience building high-performance backend systems for blockchain applications.
- Public GitHub repositories showcasing blockchain projects.
- Active participation in Web3 communities or hackathons.
- Technical blog posts, conference talks, or open-source contributions.
- Experience leading projects or mentoring engineers.
Benefits
- Competitive salary and meaningful equity package.
- Health, dental, and vision coverage.
- Remote-first flexibility and home-office stipend.
- Annual learning and development budget.
- Generous paid time off and company holidays.
Equal Opportunity
Trexonium is an equal opportunity employer. We value diversity, inclusion, and equity, and we do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, veteran status, or disability status.