full-stack developer

Elinext develops software solutions for enterprise clients worldwide.

• Take ownership of an existing production SaaS application;
• Review and understand an established, partially documented codebase;
• Develop and improve frontend functionality using React, Next.js, and TypeScript;
• Build and maintain backend services and REST APIs using Node.js and TypeScript;
• Work with multi-tenant architecture, including tenant isolation and tenant-specific access control;
• Implement and maintain secure authentication and authorization flows;
• Work with OAuth, OIDC, RBAC, and identity-management mechanisms;
• Develop and maintain integrations with MongoDB, Cosmos DB, and PostgreSQL;
• Deploy and troubleshoot applications in cloud-based environments;
• Build and maintain CI/CD pipelines and Docker-based deployments;
• Implement automated unit, integration, API, and end-to-end tests;
• Follow secure-development practices, including OWASP recommendations and secrets management;
• Investigate and resolve production issues independently;
• Maintain clear technical documentation;
• Support knowledge transfer and application handover activities.

• 5–10 Years of professional software-development experience;
• Strong commercial experience with React, Next.js, and TypeScript;
• Strong backend-development experience with Node.js and TypeScript;
• Solid experience developing and integrating REST APIs;
• Proven production experience with SaaS applications;
• Strong hands-on experience with multi-tenant SaaS environments;
• Good understanding of tenant isolation and secure data separation;
• Strong knowledge of authentication and authorization concepts;
• Experience with OAuth, OIDC, and RBAC;
• Experience with MongoDB or Cosmos DB;
• Experience with PostgreSQL;
• Practical experience with Git, CI/CD, Docker, and cloud deployments;
• Ability to independently understand, build, deploy, and troubleshoot an existing codebase;
• Experience with unit, integration, API, and end-to-end testing;
• Knowledge of secure-development practices, OWASP, and secrets management;
• Experience working with partially documented production systems;
• Strong documentation and knowledge-transfer discipline;
• Fluent in English;
• Nice to have: Experience integrating OpenAI or Azure AI services, Experience integrating Python-based AI services, Experience with Supabase, Experience with cloud-native European providers, Experience with Sentry, Experience with PostHog, Strong knowledge of software and solution architecture.

• No conditions specified