Lead Backend Engineer – Commerce Platform, Barcelona Hybrid

Q-Tech; Barcelona; Hybrid; EUR 90,000 - 130,000; Full time

Benefits offered by this job

Health insurance

Pension plan

Meal vouchers

Flexible compensation

Job summary

Q-tech is expanding its Barcelona hub with a hands‑on Senior or Lead Engineer who loves coding and sharing knowledge. The role focuses on building scalable backend services in Node.js/TypeScript, driving a shift to serverless event‑driven architectures, and mentoring teams to raise the technical bar.

You will design integrations with payment providers and cross‑team platforms while actively steering AI adoption and architectural decisions to align with product vision.

Qualifications

• Senior Engineer or Tech Lead with cross‑team influence.
• Strong background building customer‑facing web services with JavaScript/TypeScript/Node.js.
• Experience designing scalable cloud services on AWS, ideally serverless and event‑driven.
• Hands‑on experience introducing AI‑assisted engineering practices.

Responsibilities

• Build scalable, resilient backend services in Node.js and TypeScript (with some Rust) on AWS.
• Drive evolution to an event‑driven, serverless architecture (Lambda, DynamoDB, SQS, SNS).
• Design integration strategies with third‑party payment providers and commercial platforms.
• Mentor engineers and lead technical initiatives that affect the whole company.

Skills

Node.js

TypeScript

JavaScript

AWS

Serverless architecture

AI adoption in engineering

Tools

AWS Lambda

DynamoDB

SQS/SNS

Copilot

Job description

Q-tech is expanding its Barcelona hub with a hands‑on Senior or Lead Engineer who loves coding and sharing knowledge. The role focuses on building scalable backend services in Node.js/TypeScript, driving a shift to serverless event‑driven architectures, and mentoring teams to raise the technical bar.

You will design integrations with payment providers and cross‑team platforms while actively steering AI adoption and architectural decisions to align with product vision.