Senior Blockchain Developer

Luxoft -
Remote

Apply Now

Job details

5 days ago

Qualifications

Jira
Engineering
English
Java
Master's degree
PKI
Docker
Bachelor's degree
CI/CD pipelines
Continuous integration
SDKs
Back-end development
Scrum
Technical writing
Financial services
Kafka
English

Full job description

Project description

Modernization as a Service (MaaS) is a cross-functional practice supporting all business verticals within the company.

We are seeking a Senior Blockchain Developer to join our project with our client, a leading financial institution in the UK.

Responsibilities

Design, build, and deploy Web3 components, including smart contracts, event listeners, wallet integrations, and protocol connectors for a digital asset platform.

Develop backend services using Java/Spring and Node.js to interface with public and permissioned blockchains through SDKs such as Web3J, Ethers.js, and Viem.

Write, test, and audit Solidity contracts to ensure security, correctness, and gas efficiency.

Implement event-driven architectures to handle on-chain events, transaction lifecycles, and state synchronization.

Support tokenization, custody, and DeFi/TradFi bridging integrations, contributing to architectural and design decisions.

Maintain engineering standards by performing code reviews, producing documentation, and participating in Agile delivery within a distributed global team.

Skills

Must have

Core / must-have:

Smart contracts: Solidity development, testing (Hardhat, Foundry, Truffle), security best practices, gas efficiency

Web3 libraries: Web3J, Web3JS, Ethers.js, Viem — integrated into enterprise backends

Backend engineering: Java/Spring and/or Node.js, API design, microservices, design patterns

Blockchain fundamentals: consensus mechanisms, transaction lifecycle, gas models, wallet infrastructure, key management

Token standards: ERC-20, ERC-721, ERC-1155, ERC-3525 and tokenization patterns

Event-driven / async architecture: on-chain event listeners, state synchronization, message queuing (Kafka, RabbitMQ)

Cryptography applied to blockchain: digital signatures, hashing, PKI, secure key management

DevOps: Docker, Kubernetes, Helm, CI/CD (Jenkins), Git, Jira, observability tooling

Education: BSc in CS/Engineering; extensive overall software engineering experience with proven hands-on Web3 delivery

Soft skills / competencies

Security mindset (reentrancy, front-running, integer overflow awareness)

Attention to detail and rigour

driven by the immutability of on-chain deployments

Curiosity and fast adaptation to a rapidly evolving ecosystem

Clear communication with engineers, architects, and non-technical stakeholders

Self-managed delivery within Agile/Scrum sprints, distributed global team collaboration

Code review participation and technical documentation

Nice to have

Permissioned/alternative networks: Hyperledger Besu, Canton, Solana

Layer 2 (Polygon, Optimism, zkSync) and cross-chain interoperability

Digital asset custody, DeFi/TradFi bridging

Financial services or other regulated-industry background

MSc

Other

Languages

English: B2 Upper Intermediate

Seniority

Senior

Remote United Kingdom, United Kingdom of Great Britain and Northern Ireland

Req. VR-124706

Java

BCM Industry

24/08/2026

Req. VR-124706

Apply Now

Project description

Responsibilities

Skills

Other

Jobseeker tools

Employer Tools

Browse

Stay Connected