AI-Driven Backend Engineer (Java/TypeScript/NestJS)

Phexum; Fatih; On-site; TRY 350,000 - 520,000; Full time

Job summary

Phexum is seeking a Software Engineer to join our team in Istanbul on a full-time, on-site basis. You will contribute to AI-based application development, focusing on backend and integration tasks for LLM projects.

Responsibilities include building scalable services with Java and TypeScript, implementing MCP and LLM integrations, and optimizing PostgreSQL data models. Collaboration across the product lifecycle is essential to deliver high-quality software on schedule.

Qualifications

• 5+ years of professional software development experience.
• Hands-on experience with Java, TypeScript, NestJS and PostgreSQL.
• Experience with LLM programming and MCP (Model Context Protocol) is required.

Responsibilities

• Actively participate in the backend and application development processes of AI-driven projects.
• Develop scalable, secure, and high-performance services using Java, TypeScript, and NestJS.
• Implement LLM (Large Language Model) and MCP integrations, embedding agentic/AI architectures into applications.
• Perform database modeling, structural design, query optimization, and management on PostgreSQL.
• Maintain codebase sustainability and ensure developments adhere to high code quality and testing standards.
• Collaborate effectively with the team across the product development lifecycle to deliver assigned tasks on time.

Skills

Java

TypeScript

NestJS

MCP

LLM programming

PostgreSQL

Tools

PostgreSQL

Job description

Phexum is seeking a Software Engineer to join our team in Istanbul on a full-time, on-site basis. You will contribute to AI-based application development, focusing on backend and integration tasks for LLM projects.

Responsibilities include building scalable services with Java and TypeScript, implementing MCP and LLM integrations, and optimizing PostgreSQL data models. Collaboration across the product lifecycle is essential to deliver high-quality software on schedule.