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Principal Backend Engineer|ArchitectLudex Enterprise • Chicago, Illinois, United States
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Principal Backend Engineer|Architect

Ludex Enterprise
  • US
    Chicago, Illinois, United States
  • US
    Chicago, Illinois, United States
Postuler Maintenant

À propos

Location: Chicago, IL (Hybrid – 1 day/week in-office) Company: Ludex, Inc.
About Ludex Ludex is a consumer-facing technology platform transforming the sports and trading card hobby through AI-driven scanning, data, and marketplace tools. We build products used by millions of collectors and enterprise sellers, and we move fast. If you thrive in a startup environment where ownership, velocity, and impact matter, you’ll feel at home here.
Role Overview We are seeking a hands‑on
Principal
Engineer to help design, build, and scale the backend systems that power Ludex’s consumer and Enterprise products. This role is ideal for an experienced engineer who enjoys building high‑performance, scalable applications, working close to the product, and operating with an entrepreneurial mindset.
You will play a critical role in architecture decisions, performance optimization, and the evolution of our platform as we scale users, data volume, and revenue.
This role requires a high level of ownership and autonomy. You will be responsible for making key backend architecture decisions and driving execution in a fast-moving startup environment.
Key Responsibilities
Design, develop, and maintain scalable backend services using Node.js, NestJS, and TypeScript
Build and optimize APIs that support consumer-facing products and enterprise workflows
Design, manage, and optimize PostgreSQL databases and data models for performance and reliability
Work with AWS infrastructure (e.g., EC2, RDS, S3, Lambda, CloudWatch, etc.)
Collaborate closely with frontend engineers, product, and other teams to deliver end-to-end features
Ensure high standards for code quality, efficiency, security, and performance
Identify and resolve performance bottlenecks across services and databases
Participate in architecture discussions and contribute to long‑term technical strategy
Support deployments, monitoring, and system reliability in production environments
Thrive in a fast‑paced startup environment, balancing speed with sound engineering judgement
Required Qualifications
7+ years of professional backend engineering experience
Strong proficiency with Node.js and TypeScript
Hands‑on experience with NestJS or similar backend frameworks
Deep experience working with relational databases, particularly PostgreSQL
Proven experience building and scaling consumer-facing applications
Experience working with AWS in production environments
Strong understanding of API design, data modeling, and system architecture
Ability to write clean, efficient, maintainable, and well-tested code
Strong ability to independently evaluate technical approaches and make architecture decisions in a startup environment.
Proven experience owning backend systems end-to-end, including design, implementation, deployment, and ongoing evolution.
Comfortable working in ambiguous, fast-moving environments with evolving requirements
Strong communication skills and a collaborative mindset
Nice to Have
Experience with system monitoring, observability, and performance tuning
Experience supporting high‑scale or data‑intensive applications
Prior startup or high‑growth company experience
Hybrid role: must be able to work in‑office in Chicago at least 1 day per week
Small team, high ownership, and real influence on product direction
Why Ludex
Build products used by millions of passionate collectors
High-impact role with real ownership and visibility
Opportunity to shape architecture and engineering standards
Fast-moving, entrepreneurial environment without heavy bureaucracy
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  • Chicago, Illinois, United States

Compétences linguistiques

  • English
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