Senior Backend Engineer - Node.JS (Europe, remote, f/m/d)

F11; Düsseldorf; Remote; EUR 70,000 - 90,000; Full time

Benefits offered by this job

Transparent, above-market salaries

Flexible work-hours

Home office allowance

Personal development courses

Case by case relocation support

Job summary

A digital advertising technology company is seeking a Senior Backend Engineer to optimize their SaaS applications. You will design microservices, maintain databases, and ensure optimal performance. Ideal candidates have 5+ years in backend engineering and expertise in NodeJS, AWS, and GraphQL. This role includes flexible work hours and is fully remote within Europe.

Qualifications

• 5+ years experience as Backend Engineer or similar role.
• Strong proficiency of NodeJS with TypeScript, web stacks, libraries, and frameworks.
• Good knowledge of event-driven architecture, message busses, and/or pub/sub-systems.

Responsibilities

• Developing and maintaining microservices and back-end components.
• Ensuring optimal performance of databases and responsiveness to front-end requests.
• Collaborating with developers, product owners, and stakeholders on the design.

Skills

NodeJS with TypeScript

GraphQL

Docker

AWS

Kafka

Event-driven architecture

User authentication

Automated testing

Git

Interpersonal skills

Tools

npm

Jira

Job description

Overview

We are looking for an experienced Senior Backend Engineer to expand and optimize our digital advertisement SaaS suite of applications. Using technologies such as NodeJS with TypeScript, NestJS federated GraphQL, Docker, AWS and Apache Kafka, you'll be designing microservices and other back-end components, and integrating data storage, monitoring and protection solutions. Your primary focus will be the development of all server-side logic, definition and maintenance of central databases and message busses, and ensuring high performance and responsiveness to requests from the front-end. Additionally you'll conduct regular code reviews, provide guidance to other team members, and contribute to workload estimations, project planning and architecture discussions. You will join a cross-functional team under a Product Owner to contribute to our multi-tenant SaaS product and ad-serving network. To ensure success as a Senior Backend Engineer at Factor-Eleven, you should possess extensive knowledge of NodeJS based services, good knowledge of AWS and/or Kafka, great knowledge of GraphQL/REST-APIs and experience in a similar role. An accomplished Senior Backend Developer will be someone whose expertise results in the stable, fast, and secure exchange of data between servers and end-users, and who successfully shares that expertise with the wider team. This is a high-impact role for someone who thrives on elevating engineering standards, and driving a forward-thinking, AI-first approach across the organization. Ultimately, a top-class Backend Engineer at F11 should be able to envision, plan, develop, test and deliver scalable microservices in an event-driven multi-tenant architecture, and teach others to do the same.

Responsibilities

• Developing and maintaining microservices and back-end components
• Ensuring optimal performance of databases and responsiveness to front-end requests
• Collaborating with developers, product owners and stakeholders on the design and integration of elements
• Developing high-performance applications by writing testable, reusable, and efficient code
• Implementing effective security protocols, data protection measures, and storage solutions
• Running diagnostic tests, repairing defects, and providing technical support
• Documenting server-side processes, including database schemas, message events and sagas, as well as preparing reports
• Recommending and implementing improvements to processes and technologies
• Provide mentorship and technical supervision to team-members

Requirements

• 5+ years experience as Backend Engineer or similar role
• Strong proficiency of NodeJS with TypeScript, web stacks, libraries, and frameworks
• Working knowledge of front-end technologies such as HTML5 and CSS3
• Experience with user authentication and authorization between multiple systems, servers, and environments
• High familiarity with fundamental design principles behind scalable applications
• Creating database schemas that represent and support business processes
• Good knowledge of event-driven architecture, message busses, and/or pub/sub-systems
• Proven expert knowledge implementing automated testing platforms and unit tests
• Superb interpersonal, communication, and collaboration skills
• Excellent familiarity with git, npm, docker and Jira
• Extensive experience in mentoring teammates in a respectful, educative manner
• Using AI tools such as Junie/Cursor (nice to have)

Benefits

Why us?

• Transparent, above-market salaries
• 100% remote within Europe
• Flexible work-hours and part-time models
• Be part of a fast-growing, highly-skilled team
• In person department and company events
• Home office, co-working space and work-together allowance
• Personal and professional development courses from Udemy
• Case by case relocation and visa support

Please note that you need to be residing in and hold a work permit of a country in the European Union to be considered for this role.

Details

• Seniority level: Mid-Senior level
• Employment type: Full-time
• Industries: IT Services and IT Consulting