Senior Backend Software Engineer (Node.js)

Short company description

At Evolve today we offer complex Human Resources services, from business consulting to headhunting and recruitment. We have extensive experience in finding talented professionals, for a variety of industries, especially in the IT sector.
We started with a dream: to create a Human Resources company with a strong, unique profile on the market, deeply shaped by our core values: commitment to performance, professionalism, a balanced approach and deep satisfaction for our clients.
From that moment, we nurtured special relationships and we continuously evolved, being flexible, but staying true to our values. We aim higher and higher and we invite you to EVOLVE with us!

Requirements

We are Evolve Today, a recruitment agency connecting top engineering talent with world‑class opportunities. On behalf of our client — a global organization providing scientific, medical, and analytics information platforms — we are hiring Senior Backend Software Engineers (Node.js) to build scalable backend services powering an AI‑driven research tool used by scientists, clinicians, and analysts worldwide.

Project Overview

You will contribute to an AI‑powered research platform that helps users rapidly locate, compare, and summarize evidence from peer‑reviewed scientific literature. The system provides citations, direct links to sources, and supports workflows such as study comparison, evidence synthesis, and drafting research summaries.

Role Overview

This is a backend‑focused engineering role, with occasional frontend contributions. You will design and implement scalable services, APIs, and integrations, ensuring reliability, performance, and clean engineering practices.

We’re looking for senior engineers with 8+ years of experience, strong Node.js expertise, a solid understanding of algorithms and system design, and hands‑on experience building production‑grade systems.

Contract & Working Model

· Flexible collaboration model: employment (CIM) or B2B)

· Location: Romania — remote or hybrid from Cluj / Iași

If you’re a senior backend engineer passionate about building scalable systems and contributing to AI‑powered scientific tools, send your profile and let’s talk.

Requirements

· 8+ years of professional software engineering experience

· Bachelor’s degree in Computer Science, Engineering, or equivalent

· Strong foundation in algorithms, data structures, and core programming concepts

· Strong expertise in Node.js

· Proficiency with TypeScript / modern JavaScript

· Experience designing RESTful APIs and/or GraphQL APIs

· Data modeling experience (SQL / NoSQL)

· Understanding of authentication and authorization concepts

· Experience working with production‑grade systems

· Knowledge of scalability, reliability, and performance best practices

· Experience with unit and integration testing

· Familiarity with Git and Agile workflows

Nice to Have

· Experience with observability (logging, monitoring, tracing)

· Exposure to distributed systems

· Awareness of frontend systems (React, API consumption patterns)

· Experience with CI/CD pipelines and DevOps workflows

· Exposure to AI / LLM integrations

Responsibilities

Responsibilities

· Build and maintain backend services and APIs

· Design and implement REST and/or GraphQL APIs

· Develop business logic and system integrations

· Ensure scalability, reliability, and performance of backend components

· Collaborate with frontend teams to support end‑to‑end delivery

· Write clean, testable, maintainable code

· Participate in system design, architecture discussions, and Agile ceremonies