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OnRamp

Back End Developer (Blockchain Expert)

OnRamp
Estonia · Full-time · Entry

I. Role Summary & Mission

Location: Hybrid (Remote work is also possible)


Role Overview

We are a cutting-edge fintech company focused on payments, crypto, and blockchain solutions. We are looking for a Blockchain Expert who can lead and drive our next crypto projects—ranging from crypto wallets to DEX solutions and other innovative blockchain applications.

Our Mission Our mission is to enable businesses to grow internationally at pace by providing state-of the-art payment solutions, which unify the fiat and cryptocurrency worlds. Through partnerships with leading providers, we ensure that our clients receive the best borderless payment experience.


II. Key Responsibilities


  • Design and develop blockchain-based solutions, including crypto wallets, DEX integrations, and smart contracts.
  • Provide expert guidance on on-chain and off-chain architectures, ensuring scalability and security.
  • Act as a key decision-maker on blockchain projects, providing insights on feasibility, risks, and opportunities.
  • Implement smart contracts using Solidity, Rust, or Move, ensuring security best practices.
  • Develop backend services for interacting with blockchain networks, optimizing for cost and speed.


III. Required Qualifications

Blockchain Expertise

  • Deep understanding of blockchain protocols, wallets, DEXs, DeFi, and crypto transactions.
  • Experience working with Ethereum, Solana, Polkadot, or other major chains.
  • Experience in Backend development

Development Skills

  • Rust and TypeScript (strong preference) both in Blockchain and Backend development.
  • Experience working with Node.js, Web3.js, ethers.js, or similar blockchain SDKs.
  • Knowledge of Docker, Kubernetes, AWS, or cloud-based blockchain solutions.
  • Strong proficiency in SQL, including writing complex queries and optimizing performance.



IV. Why Join us?

We believe in empowering our people and fostering a culture of continuous learning and growth. When you join us, you will receive:

  • Work on high impact projects in an extreme-engineering fast-paced environment. You will make sure transactions are accurate, reconciled across data sources, and well-presented. You will earn and maintain the trust of stakeholders and first-hand drive data platform adoption
  • Collaborative, fast-paced culture with global exposure.
  • Competitive salary and performance-based bonus structure.


How to Apply

Please submit your resume outlining your relevant experience to [email protected]

We look forward to welcoming a new leader to our team!

Key Skills

Ranked by relevance

blockchain cryptocurrency kubernetes typescript solidity docker cloud rust sql aws
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Posted
Feb 27, 2026
Type
Full-time
Level
Entry
Location
Estonia
Company
OnRamp

Industries

Financial Services

Categories

Engineering Information Technology

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