Blockchain Engineer

Ctrl Alt; Belfast; On-site; GBP 35,000 - 65,000; Full time

Job summary

A leading B2B infrastructure firm in Belfast is seeking an experienced software engineer with a strong focus on blockchain technologies. The ideal candidate will have 3+ years of software engineering experience and proficiency in TypeScript and JavaScript, as well as experience with smart contract logic and a queue-based architecture. This role offers a competitive salary ranging from £35,000 to £65,000 per year, along with generous benefits including stock options and health insurance, in a high-growth startup environment.

Benefits

Generous stock options

Private health insurance

Annual leave flexibility

Qualifications

• 3+ years of software engineering experience, with at least 1+ years working with blockchain or distributed ledger technologies.
• Experience using TypeScript/JavaScript to build integrations with blockchains.
• Familiarity with a queue-based architecture.

Responsibilities

• Design and implement secure, auditable smart contract logic for tokenization and asset management.
• Integrate blockchain technologies into backend systems.
• Collaborate with product and engineering teams to deliver blockchain-based solutions.

Skills

Software engineering experience

TypeScript/JavaScript

Blockchain technologies

Queue-based architecture

Cryptographic primitives

Communication skills

Tools

Cosmos SDK

Liquid Network

Job description

Overview

At Ctrl Alt, we combine groundbreaking technology and expert financial engineering to be a leading B2B infrastructure solution provider for alternative asset classes. Established in 2022, we have already tokenized over $460m in assets and are supported by leading VCs. Our team, based across the UK, Ireland, and UAE, consists of financial and product experts from top firms such as Morgan Stanley and Revolut. We offer generous stock options, private health insurance, annual leave flexibility, and a high-growth startup environment where your contributions significantly shape the industry. Join us in Belfast or Dundalk as we take blockchain technology to the next level.

Salary information is provided below.

Salary

Salary: £35,000 - 65,000 per year

Requirements

• 3+ years of software engineering experience, with at least 1+ years working with blockchain or distributed ledger technologies
• Experience using TypeScript/JavaScript to build integrations with blockchains
• Familiarity with a queue-based architecture
• Experience developing and deploying smart contract logic or similar on Layer 1 networks
• Familiarity with token standards and asset representation on-chain
• Understanding of cryptographic primitives (e.g. signatures, hashes, multisig) and transaction flows
• Experience integrating blockchain infrastructure into backend applications, ideally in a TypeScript/JavaScript based environment
• Knowledge of blockchain tools, APIs, and development environments (e.g. Cosmos SDK, Elements for Liquid, etc.)
• Exposure to finance or fintech environments, particularly involving digital assets or tokenization (nice to have)
• Hands-on experience with Cosmos SDK, Liquid Network, or other modular blockchain frameworks (nice to have)
• Understanding of consensus mechanisms and interoperability protocols (nice to have)
• Familiarity with regulated tokenization platforms or compliance-first blockchain use cases (nice to have)
• Experience working with custodial and non-custodial wallet systems (nice to have)
• Strong communication skills for writing documentation and technical specs (nice to have)

Responsibilities

• Design and implement secure, auditable smart contract logic for tokenization, asset management, and governance
• Work with a queue-based architecture to create transactions, send them to the blockchain node, and manage the responses to keep track of the ledger
• Integrate blockchain and distributed ledger technologies into our backend systems
• Evaluate, test, and deploy blockchain logic on networks such as Cosmos, Liquid, and other Layer 1s
• Build tools for interacting with on-chain infrastructure (transaction monitoring, wallet integrations, etc.)
• Collaborate with product and engineering teams to deliver robust blockchain-based solutions for financial institutions
• Stay up to date on developments in blockchain infrastructure, standards, and regulatory frameworks
• Promote best practices in blockchain security and operational resilience

Technologies

• Backend
• Blockchain
• JavaScript
• Liquid
• Network
• Security
• TypeScript
• NodeJS
• CTO
• Support
• MacBook

Notes: The role description above has been reformatted for clarity and accessibility while preserving the original information.