Full Stack Developer – FinTech

Nevka Systems is seeking an experienced Full Stack Developer to build and maintain secure fintech products, including digital banking, payments, wallets and remittance platforms. Candidates must have professional experience working on fintech software.

Responsibilities

• Build full stack applications using React and Remix.
• Develop backend services and APIs using Node.js and Python.
• Build and integrate payment, banking, wallet and remittance features.
• Integrate AI/LLM-based solutions and AI-powered features into applications.
• Integrate third-party APIs and services, including payment and identity verification providers.
• Implement secure authentication, access controls and transaction workflows.
• Handle webhooks, errors, retries and audit records reliably.
• Write and maintain tests, review code, troubleshoot production issues and support releases.
• Work with product, design and QA colleagues to deliver features from requirements through deployment.

Requirements

• At least 5 years of professional full stack development experience.
• Previous professional experience building or maintaining fintech, banking, payment, digital wallet or remittance software.
• Strong expertise in Node.js, JavaScript and Python.
• Professional experience with React and Remix.
• Experience designing and consuming REST APIs.
• Good understanding of databases, authentication, access control and web security.
• Good understanding of AI and Generative AI technologies.
• Experience with Git, code reviews, testing and production debugging.
• Clear communication skills and the ability to work collaboratively.

Preferred experience

• Experience with ledgers, reconciliation, KYC/KYB integrations or transaction monitoring.
• Experience with MongoDB, relational databases, Docker, cloud deployment or CI/CD.
• Awareness of audit trails and compliance requirements relevant to financial software.

What we’re looking for

A dependable developer with hands-on fintech experience who can take ownership of full stack features and build secure, reliable financial software.

Application Question(s):

• Do you have at least 5 years of professional experience in Full Stack Development?
• Are you comfortable working remotely according to UK working hours/time zone?
• What is your current salary, and what are your salary expectations for this position?
• How many years of hands-on professional experience do you have in the FinTech and Banking industry?

Work Location: In person