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Q-tech

Lead Backend Engineer – Tech Evangelist

Q-tech

. Build scalable, resilient backend services in Node.js and TypeScript, with some Rust, on AWS .

Posted 11/10/2026full-timeBarcelona • SpainSeniorWebsite

Core Competencies

Role fit
Core Competencies

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Demonstrates expertise in building scalable backend services using Node.js and TypeScript on AWS, with a focus on serverless architecture and AI-assisted engineering practices. Proven ability to mentor teams and drive technical initiatives across multiple teams without formal authority.

Highest-signal resume keywords
Node.js DevelopmentTypeScript ProgrammingAWS Serverless ArchitectureAI-Assisted Engineering PracticesMicroservices Design

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
JavaScriptRustCloud Services DesignEvent-Driven ArchitectureDynamoDBSQSSNSHigh-Traffic SystemsSystem MigrationIntegration Strategies
Soft Skills
MentoringInfluencingCollaborationProblem-SolvingTechnical Leadership
Industry Keywords
PaymentsCheckoutSubscription DomainsConsumer ProductsTech Communities

Tech Stack

Tools & technologies
AWSCloudDynamoDBJavaScriptMicroservicesNode.jsPythonReactRustTypeScript

About the role

Key responsibilities & impact
  • Build scalable, resilient backend services in Node.js and TypeScript, with some Rust, on AWS
  • Drive the evolution from microservices and legacy components to an event-driven, serverless architecture using Lambda, DynamoDB, SQS and SNS
  • Design integration strategies with third-party payment providers and commercial platforms
  • Write production code, including outside the engineer's own domain when another team needs support
  • Help define the technical direction of the Commerce platform
  • Act as a bridge between teams on cross-cutting problems
  • Drive engineering guilds and tech communities
  • Lead AI adoption in engineering by testing, evaluating and sharing AI-assisted practices
  • Challenge teams to solve the right problems
  • Mentor engineers and guide teams toward sound technical decisions
  • Guide 4–10 teams toward better technical decisions without people or budget management

Requirements

What you’ll need
  • Solid experience as a Senior Engineer or Tech Lead, with a track record of influencing beyond your own team
  • Strong background building customer-facing web services with JavaScript, TypeScript and Node.js
  • Experience designing scalable cloud services on AWS, ideally serverless and event-driven
  • Experience with high-traffic, high-transaction consumer products
  • Ability to drive technical initiatives without formal authority
  • Hands-on experience introducing AI-assisted engineering practices
  • Experience modernising or migrating complex systems
  • Fluent English (working language)
  • Nice to have: Rust, Python, React, experience in payments, checkout or subscription domains, a background in media or streaming, or experience running guilds or tech communities

Benefits

Comp & perks
  • Permanent contract
  • 30 days of paid holiday
  • Hybrid and flexible work arrangement
  • One week per quarter in Stockholm with peers
  • Yearly Hack Week
  • Private health insurance
  • Pension plan
  • Flexible compensation
  • Meal vouchers
  • Free access to the streaming platform: sports, originals, films and live channels