Senior Full Stack Engineer (AI-Assisted Development)

Tech stack: Node.js, TypeScript, React, PostgreSQL, AWSLocation: Remote within EuropeContract: B2B
PSIPay Group is an international fintech innovator providing businesses with the infrastructure required to issue payment cards, manage digital accounts and process electronic payments.The Group includes regulated electronic money institutions in the UK and Cyprus, a technical hub building advanced software solutions (Cyprus, Poland, Latvia), and a strong back-office operations center in Latvia.We combine financial services expertise with technology innovation to deliver reliable, scalable, and secure solutions for today’s fastevolving digital economy.
About the RoleWe are looking for a Senior Full Stack Engineer with advanced AI-assisted development experience to support the development of the new SaaS ledger platform.This is a hands-on engineering role for someone who can take business or technical requirements through the complete development lifecycle, including solution design, development, testing, deployment and production support.The successful candidate will be a strong software engineer who uses AI-assisted development tools to work faster and more efficiently. AI should support engineering work, but it must not replace technical understanding, critical thinking or accountability for the final solution.
What You’ll Do

• Design, develop and maintain full stack functionality for a SaaS ledger platform.
• Build backend services, APIs and integrations using Node.js and TypeScript.
• Design and optimize PostgreSQL database structures, queries and data flows.
• Contribute to frontend development and integration with backend services.
• Take development tasks from initial requirements through implementation, testing, deployment and production support.
• Build secure, scalable and maintainable solutions within a multi-tenant SaaS environment.
• Work with AWS services and cloud-native architecture.
• Contribute to CI/CD pipelines, deployment processes and infrastructure improvements.
• Use AI development tools and coding agents to support code generation, testing, debugging, refactoring and documentation.
• Critically review, test and validate AI-generated code before it is introduced into the production codebase.
• Identify areas where AI-assisted development and automation can improve delivery speed and engineering efficiency.
• Review existing code and development practices and recommend practical improvements.
• Troubleshoot complex technical and production issues independently.
• Participate in architectural decisions, code reviews and technical planning.
• Work closely with developers, product stakeholders and senior leadership.

Core Requirements

• Advanced practical expertise in AI-assisted software development, with a proven ability to use AI tools and coding agents as an integral part of the development workflow.
• Strong hands-on experience with tools such as Cursor, Claude Code, GitHub Copilot or similar, including their effective use for solution design, code generation, testing, debugging, refactoring, code review and technical documentation.
• Proven experience providing AI tools with appropriate context and instructions, critically review their output, identify errors and security risks, and improve AI-generated code before it is introduced into production.
• Strong hands-on software engineering experience at Senior level.
• Strong practical experience with Node.js, TypeScript and PostgreSQL.
• Experience delivering software functionality from initial design through development, testing, deployment and production support.
• Strong understanding of software architecture, APIs, databases, security and scalability.
• Experience developing SaaS or multi-tenant systems.
• Practical experience with AWS and cloud-native development.
• Experience with CI/CD and modern software delivery practices.
• Experience with frontend development, preferably using React and TypeScript.
• Practical experience using AI development tools or coding agents, such as Cursor, Claude Code, GitHub Copilot or similar.
• Proven experience working with existing codebases, making sound technical decisions and resolving complex technical problems independently.
• Strong sense of ownership and accountability for the quality of delivered solutions.
• Good written and spoken English.
• Based in Europe and able to provide services under a B2B arrangement.

Nice to Have

• Experience with Kubernetes, including deployments, orchestration and scaling.
• Experience with event-driven or asynchronous architectures.
• Experience integrating LLMs or external AI APIs.
• Experience in fintech, payments, digital wallets, card issuing or ledger systems.
• Understanding of financial transaction processing and ledger principles.
• Familiarity with KYC or KYB processes.
• Awareness of regulatory and security frameworks relevant to financial services, such as PSD2, DORA or PCI DSS.

Why Join Us?

• Fully remote work within an international and distributed team.
• Opportunity to contribute to the development of a new SaaS ledger platform.
• Direct involvement in architecture and technical decision-making.
• Opportunity to introduce practical AI-assisted development methods into the engineering process.
• Close cooperation with senior engineers, product stakeholders and company leadership.
• A working environment that values ownership, initiative and sound engineering judgment.
• Indicative annual B2B contract value: EUR 70,000 - 85,000

------------------------------------------We will contact you if you are invited for an interview. We will send the answer to those candidates who will be invited for an interview. If you have not received an invitation to a job interview within 2 weeks after the vacancy deadline, it is considered that you have received a refusal.
------------------------------------------By submitting an application for a vacancy, the candidate’s personal data will be processed by SIA “IT Camp” for the purpose of conducting the recruitment process. If the candidate is selected to proceed further in the recruitment process, their professional profile and the information provided in the application will be shared with the company on whose behalf SIA “IT Camp” is conducting the relevant recruitment process.
The candidate’s data may be retained in SIA “IT Camp”’s candidate database so that they can be contacted in the future regarding other suitable employment opportunities. Retaining the candidate’s data does not mean that it will be shared with other clients of SIA “IT Camp”. Before sharing the candidate’s data as part of another recruitment project, SIA “IT Camp” will contact the candidate and obtain their consent.