Blockchain Engineer (Fintech)

Blockchain Engineer

Full-time/Company: Ctrl Alt

Ctrl Alt designs and operates the on-chain infrastructure powering digital capital markets globally. Since launching in 2022 they’ve tokenized over $1.5bn in assets across real estate, private credit, funds and more.

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 blockchain nodes, and manage responses to track the ledger
- Integrate blockchain and distributed ledger technologies into 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
- Promote best practices in blockchain security and operational resilience

Requirements:

- 3+ years 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 (signatures, hashes, multisig) and transaction flows
- Experience integrating blockchain infrastructure into backend applications; knowledge of blockchain tools/APIs (e.g. Cosmos SDK, Elements for Liquid)

Nice to have:

- Exposure to finance or fintech environments, particularly involving digital assets or tokenization
- Hands-on experience with Cosmos SDK, Liquid Network, or other modular blockchain frameworks
- Understanding of consensus mechanisms and interoperability protocols
- Familiarity with regulated tokenization platforms or compliance-first blockchain use cases
- Experience working with custodial and non-custodial wallet systems
- Strong communication skills for writing documentation and technical specs

Stack:

TypeScript, JavaScript, Cosmos SDK, Elements (Liquid), Liquid Network, Cosmos, Layer 1 smart contracts, queue-based architectures

Benefits:

- Competitive salaries with regular reviews
- Generous stock options
- Premium private healthcare
- 26 days annual leave + birthday off and regional bank holidays; flexible leave
- Enhanced parental leave policy
- MacBook, screens, and any additional equipment needed
- Access to salary sacrifice schemes covering childcare, groceries, EV cars, tech, pensions, bikes, and subscriptions (UK Only)
- Annual learning and personal development budget
- Modern offices in London, Belfast, Dundalk, and Dubai

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