10 Smart Contracts jobs in the United Kingdom

Blockchain Developer
Edinburgh or Glasgow
120,000 - 150,000 rising to 240,000 to 300,000 after 6 months + Sign-on bonus + Annual bonus + Pension + Pension + Holiday + Benefits

This is a rare opportunity for an experienced Blockchain Developer to lead the design and development of a custom platform - backed by tangible assets like gold and silver.

You'll play a pivotal role in a greenfield project that blends cutting-edge blockchain engineering with real-world financial infrastructure. No forks. No clones. Just original, high-performance architecture built from scratch with a focus on transparency, security, and utility.

This group of organisations is purpose-driven, entrepreneurial, and unafraid to challenge the status quo. You'll join a small, elite team working at the intersection of finance, cryptography, and distributed systems - with full ownership and autonomy to shape the future of this sovereign blockchain ecosystem.

On offer is a rare opportunity to be part of something fast-moving and meaningful, with real autonomy, responsibility, and the potential for rapid progression.

The Role:

• Build a brand-new blockchain protocol from the ground up
• Design and implement consensus mechanisms (PoS, PoA, or novel alternatives)
• Develop low-level code in Rust, Go, or C++
• Create tools and APIs to support validators, wallets, and ecosystem developers
• Perform code reviews and contribute to protocol optimisation and security
  

The Person:

• Good years of blockchain development experience, ideally at protocol level
• Strong coding skills in Rust, Go, or C++
• Deep understanding of distributed systems and consensus design
• Familiar with cryptographic principles and secure key management

Blockchain Developer
Edinburgh or Glasgow
120,000 - 150,000 rising to 240,000 to 300,000 after 6 months + Sign-on bonus + Annual bonus + Pension + Pension + Holiday + Benefits

This is a rare opportunity for an experienced Blockchain Developer to lead the design and development of a custom platform - backed by tangible assets like gold and silver.

You'll play a pivotal role in a greenfield project that blends cutting-edge blockchain engineering with real-world financial infrastructure. No forks. No clones. Just original, high-performance architecture built from scratch with a focus on transparency, security, and utility.

This group of organisations is purpose-driven, entrepreneurial, and unafraid to challenge the status quo. You'll join a small, elite team working at the intersection of finance, cryptography, and distributed systems - with full ownership and autonomy to shape the future of this sovereign blockchain ecosystem.

On offer is a rare opportunity to be part of something fast-moving and meaningful, with real autonomy, responsibility, and the potential for rapid progression.

The Role:

• Build a brand-new blockchain protocol from the ground up
• Design and implement consensus mechanisms (PoS, PoA, or novel alternatives)
• Develop low-level code in Rust, Go, or C++
• Create tools and APIs to support validators, wallets, and ecosystem developers
• Perform code reviews and contribute to protocol optimisation and security
  

The Person:

• Good years of blockchain development experience, ideally at protocol level
• Strong coding skills in Rust, Go, or C++
• Deep understanding of distributed systems and consensus design
• Familiar with cryptographic principles and secure key management

Blockchain Developer
Edinburgh or Glasgow
£120,000 - £50,000 rising to 40,000 to 00,000 after 6 months + Sign-on bonus + Annual bonus + Pension + Pension + Holiday + Benefits

This is a rare opportunity for an experienced Blockchain Developer to lead the design and development of a custom platform - backed by tangible assets like gold and silver.

You'll play a pivotal role in a greenfield proje.

Blockchain Developer
Edinburgh or Glasgow
£120,000 - £50,000 rising to 40,000 to 00,000 after 6 months + Sign-on bonus + Annual bonus + Pension + Pension + Holiday + Benefits

This is a rare opportunity for an experienced Blockchain Developer to lead the design and development of a custom platform - backed by tangible assets like gold and silver.

You'll play a pivotal role in a greenfield proje.

Blockchain Developer - Web3 / DeFi Innovator - London

(Tech stack: Blockchain Developer, Solidity, Node.js, React, HTML5, CSS3, TypeScript, Foundry, Hardhat, Ethereum-based ecosystems, bridging between L1 and L2, NoSQL databases, Git, Agile, Rust, Go, L2 frameworks, Unity, Unreal, GoDot, Programmer, Full Stack Engineer, Architect, Blockchain Developer)

We have an exciting new opportunity for a Blockchain Developer to join one of London's most forward-thinking Web3 / DeFi innovators. This is your chance to work at the cutting edge of blockchain technology-building scalable, decentralised applications and systems with real-world impact. Our client is on a mission to reshape how decentralised finance and digital ecosystems interact, using sophisticated Layer 2 scaling solutions and bleeding-edge tech.

Our client is looking for a passionate Blockchain Developer with strong skills in Ethereum-based ecosystems. You will be joining a world-class engineering team, contributing across the full stack, from writing performant smart contracts to architecting scalable back-ends and beautiful user-facing interfaces.

They will provide exposure and training in: Solidity, Node.js, React, HTML5, CSS3, TypeScript, Foundry, Hardhat, Ethereum-based ecosystems, bridging between L1 and L2, NoSQL databases, Git, Agile, Rust, Go, L2 frameworks, Unity, Unreal and GoDot.

This is your opportunity to be involved in building a brand-new decentralised application from the ground up, working in an agile, fast-paced and intellectually stimulating environment. Web3 is evolving rapidly and our client is at the forefront.

All Blockchain Developer positions come with the following benefits:

• Token-based equity options.
• Private healthcare.
• Remote-first working environment.
• 3 hours of innovation time each week to explore emerging blockchain tech.
• Annual training budget of £5,000.
• 28 days holiday (excluding Bank Holidays) plus your birthday off.
• Flexible working hours.
• Monthly team socials (virtual and in-person).
• Work-from-anywhere policy for up to 6 weeks per year.

Location: London, UK / Fully Remote

Salary: £5,000 - 0,000 + Bonus + Equity + Benefits

Applicants must be based in the UK and have the right to work in the UK, even though this is a remote-first position.

NOIRUKTECHREC
NOIRUKREC

Rust Engineer (Blockchain) (UK or Europe Remote)

I am currently hiring for an experienced engineer on a permanent basis. This role is to join a growing start-up who have good backing by investors. This role will have you work directly with the founder of the business.

Company Overview:

Crypto for On and Off Fiat exchanges of funds (a payment gateway) - converts normal currency into crypto, and then b.

We are seeking two Senior Front-End Blockchain Developers to join a UK-based B2B trading platform in the fintech space. You will continue the development of a Ruby/Rails and React web application, ensuring a seamless user experience and robust integrations with blockchain-based core services. This is a full-time, 12-month contract role with a preference for hybrid work in the UK.

Job Details

• Job Tit.

WHJS1_UKTJ

We are seeking two Senior Back-End Blockchain Developers to join a UK-based B2B trading platform leveraging blockchain technology. You will develop and maintain the platform's back-end, focusing on Solana/Rust for blockchain integration, platform security, business logic, and database management. This is a full-time, 12-month contract role with a preference for hybrid work in the UK.

Job Details

• Job.

WHJS1_UKTJ

Quant

Our vision is of an empowered, interconnected world.

To achieve it, we’re unlocking the power of blockchain for everyone by building interoperable ecosystems and real-world solutions that simply work - lowering costs, enabling new business, and mitigating risk for our users in the process.

We work with financial institutions, governments, multinational companies, and the partners and fintech developers who support them, to deliver enterprise-grade technology built with security and compliance front of mind.

Founded in 2018, Quant is UK-based with a US presence. We spearheaded the Blockchain ISO Standard TC307 adopted by 57 countries and organisations worldwide and solved interoperability with the creation of the world’s first blockchain-agnostic API gateway, Overledger. Our high-integrity leadership team has deep experience in government, financial services, technology, healthcare, and management consulting.

Our partners include Amazon Web Services and Oracle, and we’re a founding member of the Digital Pound Foundation.

The R&D team

At Quant, our world class R&D team are at the heart of our company, researching cutting edge distributed ledger technologies (DLTs) and building innovative applications that use them. We work in a flexible environment utilising any beneficial process, technique, and/or tool that enables us to focus fully on delivering value at pace and solving problems pragmatically. We are highly collaborative and fiercely protective of our culture. Trust and respect are key to that culture, which is why we’re supportive of one another and don’t shy away from difficult conversations.

Your role

You will be involved in cutting edge research and development in the distributed ledger technology (DLT) domain. You will work with multiple different DLTs to connect them to our main Overledger API gateway product. You will also develop advanced applications that can work across different DLT networks. These applications will focus on interoperability, scalability or privacy use cases.

Key responsibilities

• Translate high-level requirements into research objectives.
• Produce well documented research (written or programmatic) that align with the agreed research objectives.
• To take an active hands-on approach to all aspects of the research lifecycle including research objectives specification, technical design, and when appropriate, prototype development and testing.
• Communicate to others your progress, and shape how your research can be implemented in production environments.
• Collaborate closely with engineering squads to impart your knowledge across.

Our shared values

We have expertise in finance and technology in common but what unites us is our beliefs. We believe in:

• Innovation: We love a challenge and have little respect for the status quo. Experience has taught us that problems are a matter of perspective and that, with new ideas and a fresh way of looking at things, solutions often present themselves.
• Ambition: The scale of a task won’t deter us when we believe it will take as closer to our vision. Every problem is an opportunity. Every obstacle, the chance to take a calculated risk and question assumptions. In short, we’re not afraid to think big.
• Trust: Fundamental to a prosperous economy, trust also lies at the heart of our company. Indeed, we believe it is the bedrock of a healthy society committed to equality and fairness. We trust each other, we engineer trust into our solutions, and we work hard every day to earn the trust of our clients and partners.
• Adaptability: We remain open-minded, objective and flexible at all times. When the facts change, so does our approach. We embrace that agility and encourage all those we work with to do the same.
• Respect: We’re respectful of the ideas and perspectives of others, we celebrate people’s differences and recognise their achievements. We also hold the needs and health of our environment dear. And we have no tolerance for bullying, harassment, or discrimination of any kind.

Requirements

Required skills or experience

• Experience with blockchain/DLT.
• Demonstratable technical and research capability within blockchain/DLT, e.g. interacting with different DLTs, developing smart contracts, analysing consensus protocols, building distributed applications and mastering the related cryptography.
• Good written and verbal communication skills - needed for communicating with a wide range of people, both internally and occasionally externally in a professional manner.

Desirable skills or experience

• Experience with an EVM (Ethereum-based) blockchain and one other type.
• Some experience of building apps/workflows using blockchain.
• Some experience with interoperability focused blockchain applications or infrastructure.
• Experience of working in a dynamic environment often with shifting priorities.

Benefits

Life at Quant

We aim to be one of the most desirable employers in fintech, somewhere you are valued and inspired to do the best work of your career, alongside a high-performance team that feels the same. That’s why, in addition to a competitive salary and performance-related bonus, we provide:

• Pension scheme
• Health insurance
• Life assurance
• Paid parental leave
• Paid sick leave
• Physical and mental wellbeing perks including online fitness classes, online GP consultations and discounted gym membership

Whilst applications may be reviewed as they are received, we anticipate to not accept any further applications after 5pm GMT on Friday 14th June 2024.

Note to recruitment agencies

We hire the majority of our talent directly via internal resourcing or referrals. On occasion, we will assign a current vacancy to our confirmed and preferred vendor list. Speculative CVs or introductions sent by other agencies or outside of the agreed process will not be accepted and recruitment fees will not be applicable.