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AI-first Full Stack Developer

First Talent
para, Spain
1 day ago
Apply on www.adzuna.es
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Role details

Contract type
Permanent contract
Employment type
Full-time (> 32 hours)
Compensation
€5,000
Working hours
Regular working hours
Languages
English, Russian
Job source
www.adzuna.es

Tech stack

Java (Programming Language) PHP (Programming Language) Artificial Intelligence Amazon Web Services Applications Architecture Business Logic Application Performance Management User Authentication C Sharp (Programming Language) Code Review Databases Continuous Integration
+22 more
Cursor Python (Programming Language) PostgreSQL Next.js Secure Coding Systems Integration TypeScript Web Applications Cloud Platform System ReactJS Claude Code Software Security AI Coding Agents Backend Git Kotlin Kubernetes Front End Software Development NestJS Restful APIs Docker Golang

Job description

  • Develop, maintain, and improve web applications and backend services for FCE’s OTC platform and related products.
  • Build responsive, user-friendly interfaces and implement business logic on the backend.
  • Design, develop, and maintain REST APIs and integrations with external services.
  • Work with databases, data models, and application architecture to ensure performance and scalability.
  • Collaborate with Product Managers, designers, and other engineers to translate business requirements into technical solutions.
  • Own features end to end: UI, backend, database, external integrations, tests, release behind a feature flag, and checking it works in production.
  • Turn a product request into a short solution note and plan, reviewed by a colleague before the agent starts.
  • Review colleagues’ and agents’ changes, an equal part of the job.
  • Write tests with every change, without exception on paths that move money or change permissions.
  • Investigate your own feature if it breaks in production.
  • Optimize application performance, reliability, and security.
  • Contribute to technical documentation and follow established development standards.
  • Work with payment, financial, and digital asset-related functionality where required.

Requirements

  • Mid-level or senior-level
  • Experience with systems where a mistake means a money or data incident: banking, payments, brokerage, custody, fintech. Crypto experience is a plus, not a requirement.
  • Our stack: TypeScript, NestJS, Next.js/React, PostgreSQL, Kubernetes on AWS. It is not a filter: strong full-stack engineers with Go, Python, Java/Kotlin, PHP or C# on the backend and a modern frontend are welcome.
  • Daily hands-on work with coding agents (Claude Code, Codex, Cursor in agent mode). Be ready to walk us through your last task from brief to merge, including where the agent got it wrong.
  • Writes clearly: solution notes, plans and review comments are understood on first read.
  • Russian: fluent or native, required.
  • English: confident working level.
  • All interview stages are on live video with camera on; identity and background checks are standard for this role.
  • Strong understanding of authentication, authorization, application security, and secure coding practices.
  • Experience with Git, code reviews, and collaborative development workflows.
  • Familiarity with Docker, CI/CD pipelines, and cloud environments.
  • Ability to troubleshoot complex issues and write clean, maintainable, and testable code.
  • Ability to work independently, take ownership, and collaborate effectively within a team.

Benefits & conditions

  1. Compensation: Competitive compensation based on experience.

Apply for this position

This job is hosted externally. Click below to view the full posting and apply.

Apply on www.adzuna.es
Prepare application

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