Vault Core Engineer (DRWN)

Project overview

Senior Vault Core Engineer (DRWN)

Job title - Senior Vault Core Engineer / Smart Contract Developer

Client Location - London, United Kingdom

Remote work offering - 90% (remote, with on-site visits roughly twice a month)

Client Industry - Banking / Financial Services

Contract Length - 12 months

Contract type - Freelance

Project focus

Hands-on engineering on a Thought Machine Vault Core banking implementation. You will build and maintain Vault Smart Contracts and product configurations, turn banking requirements into Python product logic, integrate Vault with surrounding banking systems, resolve issues around postings, interest, schedules and product behaviour, and support releases into production alongside architects, developers and business stakeholders.

Key skills and Experience required

If this role is of interest, please apply with an updated CV.

Darwin Recruitment is acting as an Employment Business in relation to this vacancy.

• Commercial, hands-on experience with Thought Machine Vault Core, ideally on a live bank implementation
• Strong Python development skills
• Designing, building and deploying Vault Smart Contracts
• Solid knowledge of Vault Core architecture, APIs, hooks, posting instructions, balances and scheduled events
• Configuring financial products such as lending, savings, deposits or current accounts
• Integrating Vault with other banking systems via REST APIs, microservices or event-driven architecture
• Good grasp of banking processes and calculations, including interest, fees, repayment schedules and account lifecycles
• Automated testing, Git and CI/CD
• Beneficial: AWS, Azure or GCP; Kubernetes, Docker and Kafka; legacy core banking migrations to Vault; Vault Payments; Thought Machine certifications; technical leadership

Project details

• Start: date 11/2026
• Duration: 12 months
• Remote: onsite
• Location: Bristol, United Kingdom, GB