Senior Blockchain Engineer (Ethereum)

Status
London, UK
Full time
Hybrid
Compensation is not specified
Role
Software Engineer
Description

At R3, we are revolutionizing the world. If you are passionate about cutting-edge blockchain and distributed ledger technology (DLT) and want to be a part of transforming the future of business, then joining our team is the right move for you.

Corda is a DLT platform specifically designed for conducting complex workflows between businesses without the need for centralized control. Trusted by top financial institutions, including banks, insurance companies, stock exchanges, and payment providers, Corda delivers reliable, scalable, and high-performing decentralized systems.

Role Summary

As a member of the Corda Platform's Interoperability engineering team, you will be responsible for developing the bridging technology between Corda and public blockchains like Ethereum. This is an exciting opportunity to contribute to a greenfield project by providing architectural designs, code reviews, and managing your own time efficiently. Your dedication to building and shipping exceptional software will play a crucial role in the team's success.

Key Responsibilities

  • Collaborate with the team to develop software, review designs and code, and ensure the quality of our products.
  • Resolve issues identified through QA or Support tickets.
  • Maintain a culture of collaboration and craftsmanship, appreciating the contributions of your peers and striving to meet commitments.
  • Work closely with teammates to ensure the cohesive delivery of our product.
  • Embrace an ownership mentality, making design choices, learning from experiences, and constantly improving the capabilities of our software.

Other Responsibilities

  • Represent the team in cross-team alignments, retrospectives, and technical discussions.
  • Present the work of the team to stakeholders within R3.
  • Contribute to blogs and internal tech-talks.

Essential Skills

  • Strong programming skills and a solid technical background.
  • Understanding that Software Engineering is a discipline and Programming is a craft, with the desire to continuously improve both.
  • Proficiency in working with Ethereum or Enterprise Ethereum.
  • Experience in developing and deploying software on the Ethereum Virtual Machine (EVM).
  • Familiarity with enterprise-level software development, including Java, Kotlin, and cloud technologies like AWS (though not mandatory).
  • Knowledge of standard building and delivery automation tools, with experience in Gradle preferred.
  • Previous experience in domains where high availability and performance are crucial.
  • Commitment to delivering high-quality products and agility in engineering, always striving for the best for our customers.

R3 is at the forefront of digital finance, driving multi-party solutions that enable digital trust and unlock immense potential for regulated businesses worldwide. At R3, we embrace diversity and inclusivity, supporting individuals of all ethnicities, races, genders, sexual orientations, origins, disabilities, veteran statuses, and cultures. Our core values – Collaborative, Ownership, Bold, and Customer First – drive our success, and our flagship DLT platform, Corda, is trusted by leading financial market infrastructures, central banks, commercial banks, and exchanges.

Corda empowers regulated institutions with an open and permissioned distributed application platform, revolutionizing direct digital collaboration for solving complex multi-party workflows.

R3 is proud to provide equal opportunities in the workplace. If you believe you can contribute to our mission, please share your CV/resume with us. We value fearless and collaborative individuals who are excited to join our team.

Skills Required
Avatar
r3
Website
r3.com
Company size
Not specified
Location
United States
Description
Not specified
Status

More Full-time Jobs

Show more

🚀 Hiring Solana Developers – Pump.fun

Montana City, USA
Montana City, USA
Full time
Remote
Solana Developer Needed – Pump.fun Style Platform (Starter Code Available)
 
Hi,
 
I’m reaching out from Valiant Solution LLC. We’re currently working with a U.S.-based client who is an experienced crypto professional and we’re looking for a skilled Solana developer to help build a platform similar to Pump.fun.
 
We already have a basic codebase from GitHub that the developer can start from, so the project will mainly involve customizing, improving, and completing the functionality rather than building everything from scratch.
 
Key requirements:
• Experience with Solana smart contracts (Rust / Anchor)
• Knowledge of token launch mechanics and bonding curves
• Experience with Solana Web3 integrations
• Ability to work with an existing codebase and extend it
 
If this sounds interesting, please reply with:
• Your Solana development experience
• Links to relevant projects or GitHub
• Your availability for a quick discussion
 
Looking forward to connecting.
 
Best regards,
Valiant Solution LLC
Payment in Crypto
13,000-20,000
Monthly
See details

Junior/Mid Decentralized Infrastructure Engineer

Full time
Remote
Role:
Help build and scale decentralized infrastructure: contribute to compute networks, protocols, storage layers, and orchestration tools that power AI agents and open digital systems. You’ll write code, run tests, fix bugs, and ship real features fast.
Skills & Requirements: 
1–3 years in blockchain infra, distributed systems, or high-scale compute (or strong personal projects) 
Solid Python / Rust / Go skills 
Interest in libp2p, IPFS, GPU orchestration, or decentralized compute 
Quick learner who ships clean code and loves performance/cost challenges
Salary:
$110,000 – $165,000 USD base + meaningful equity (portfolio startup) + full benefits + Sirex carry
Description:
Sirex.vc doesn’t just invest — we plug strong builders straight into our portfolio companies.
This is your chance to work on the real infrastructure behind autonomous agents and the open digital economy. Full support from the Sirex team, fast growth, zero bureaucracy.
High risk. Zero apologies.
Payment in Crypto
9,167-13,750
Monthly
See details

Senior Decentralized Infrastructure Engineer

Full time
Remote
Role:
Build and scale production-grade decentralized infrastructure: compute networks, protocols, storage layers, orchestration for AI workloads, and open-source primitives that power the next generation of agent systems.Skills & 
Requirements: 
4+ years in blockchain infra, distributed systems or high-scale compute 
Deep experience with Rust / Go / C++ and protocols (libp2p, IPFS, custom consensus, GPU orchestration) 
Bonus: self-hosted AI compute, decentralized training or edge inference 
Ship fast, own uptime, love extreme performance and cost efficiency
Salary:
$175,000 – $255,000 USD base + big equity (portfolio startup) + full benefits + Sirex carry
Description:
Sirex.vc doesn’t just invest — we plug elite builders straight into our fastest portfolio companies.
This is your chance to build the actual rails for autonomous agents and open digital economy at scale. Zero bureaucracy, maximum leverage.
High risk. Zero apologies.
Payment in Crypto
14,583-21,250
Monthly
See details

Web3 Fullstack Developer

Part time
Remote
🌐 About Us
Neonflick is a tech organization specializing in Web3 development.
We believe Web3 solutions are not as popular as they could be — mainly due to complexity. Our mission is to simplify the user experience and make decentralized technology more accessible and easy to use for everyone.
🚀 About the Role
We are looking for a Web3 Fullstack Developer who is passionate about decentralized technologies and excited to contribute to building meaningful Web3 products. You will work on developing new products, improving existing ones, and fixing bugs, all while proposing innovative ideas to enhance our platform.
🔹 Responsibilities
Develop functional and user-friendly Web3 products
Improve and optimize existing products and features
Identify and fix bugs or issues in the system
Propose and implement new ideas for product development
Collaborate with the team to ensure high-quality software delivery
🔹 Requirements
Strong interest in Web3 / blockchain / decentralized technologies
Fullstack development experience (frontend + backend)
Experience with smart contracts and decentralized frameworks is a plus
Problem-solving skills and attention to detail
Ability to work independently and proactively
🔹 What You Get
Early-stage involvement in a Web3 tech organization
Influence over product development and feature design
Opportunity to build experience and a portfolio in the Web3 space
Potential long-term collaboration and future compensation as the project grows
A chance to contribute to making Web3 simpler and more accessible
⚠️ Important
This is an unpaid position. We are looking for someone motivated by vision, learning, and long-term impact rather than immediate salary.
If you are passionate about Web3 and building meaningful decentralized products, we’d love to hear from you.

Junior AI Engineer

Full time
Remote
Role:
Join one of our fast-growing portfolio startups and help build simple AI features. You’ll work with large language models, create basic automations and chat tools, test ideas, fix small bugs, and integrate AI into everyday products.
Skills & Requirements: 
0–2 years of experience (fresh graduates or self-taught welcome) 
Basic Python knowledge 
Interest in AI, LLMs or chatbots (personal projects are a big plus) 
Quick learner who enjoys trying new things 
Good English for team communication
Salary: $95,000 – $135,000 USD base + equity in the startup + full benefits
Description:
Sirex.vc not only invests — we actively help our portfolio companies hire great people. This Junior AI Engineer role is inside one of our AI-native startups. You’ll get real hands-on experience, learn from the best, and build things users actually use — all with full support from the Sirex team.
High risk. Zero apologies.
Payment in Crypto
7,917-11,250
Monthly
See details