Senior Node.Js Backend Engineer (Online Payment Systems)

Medium; Tremblay-en-France; Hybride; EUR 55 000 - 75 000; Plein temps

Résumé du poste

A leading tech company in Tremblay-en-France is seeking an experienced backend developer to work on scalable systems for online payments. You will design and maintain services using Node.js and TypeScript, ensuring reliability and security. The ideal candidate has robust experience in production environments, particularly with online payment systems. This role offers flexible working hours, a strong compensation package, and a focus on employee well-being and growth.

Prestations

Flexible working hours

Competitive compensation package

Health coverage

Generous parental leave

Unlimited paid time off

Budget for conferences

Home office support

Qualifications

• Strong professional experience with Node.js and TypeScript in production.
• Solid knowledge of MongoDB and experience designing data models.
• Proven experience with online payment systems or transaction-based platforms.
• Good understanding of low-level systems concepts.

Responsabilités

• Design, build, and maintain scalable backend services.
• Contribute to the architecture of core backend components.
• Collaborate with engineers and product stakeholders.
• Ensure reliability, performance, and security of services.
• Write clean, maintainable, and well-tested code.

Connaissances

Node.js

TypeScript

MongoDB

Online payment systems

Go

Rust

C

Description du poste

In this role, you will contribute to the evolution of a high-impact platform used by millions of developers and organizations worldwide. You will focus on building and scaling backend systems that support secure, reliable online payment flows in a fast-growing, product-driven environment. Working closely with experienced engineers, you will have strong autonomy to design, test, and deploy your solutions. Your work will directly influence platform reliability, performance, and user trust. This position offers the opportunity to operate at scale while staying close to modern open‑source tech.

Accountabilities

• Design, build, and maintain scalable backend services using Node.js and TypeScript, with a strong focus on online payment systems
• Contribute to the architecture and evolution of core backend components supporting high‑traffic and high‑availability use cases
• Collaborate across the stack with engineers and product stakeholders to deliver robust, user‑centric solutions
• Ensure reliability, performance, and security of payment‑related services and integrations
• Write clean, maintainable, and well‑tested code while continuously improving engineering standards
• Participate in technical discussions, reviews, and iterations to drive platform‑wide improvements

Requirements

• Strong professional experience with Node.js, TypeScript, and backend development in production environments
• Solid knowledge of databases such as MongoDB and experience designing data models at scale
• Proven experience working on online payment systems or transaction‑based platforms
• Good understanding of low‑level systems concepts, with exposure to languages such as Go, Rust, or C considered a plus
• Ability to work effectively in a fast‑paced, collaborative, and distributed engineering environment
• Curiosity, autonomy, and a continuous learning mindset, with a passion for modern technologies

Benefits

• Flexible working hours with remote‑friendly work options
• Competitive compensation package including company equity
• Health, dental, and vision coverage for employees and dependents
• Generous parental leave and unlimited paid time off
• Budget for conferences, training, and continuous education
• Home office support and access to global office locations when needed
• Inclusive culture with a strong focus on employee well‑being and growth