Backend developer Java z AI

speedapp

Warszawa, mazowieckie💼 Full-time💰 $120–$130🗓 2026-04-30 → 2026-08-10

Core

Building backend systems with AI capabilities for a telecommunications client.

Role type

Senior/Mid Backend Developer (Java)

Builds

Distributed systems, REST APIs, event-driven architectures

Domain

Telecommunications, Backend Engineering

Deliverable

production ML models | product features

Required skills

Java 21+, Spring Boot 3.x, REST API design, OpenAPI, event-driven architecture, unit/integration testing, monitoring & logging, Spring Security/OAuth2/JWT, NoSQL (MongoDB), Maven

Preferred skills

Node.js, TypeScript, Express/Fastify/NestJS, Kafka/RabbitMQ, GraphQL, Docker, Kubernetes, Terraform, OpenTelemetry, Jest/Vitest

Responsibilities

Designing and developing distributed systems, owning production incidents, leading technology migrations, mentoring junior/mid developers

Seniority

Senior (6+ years), Mid (4+ years)

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