Senior Backend Developer - Node.js

JobgetherFrance

Remote Full-time

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Experience Level

Senior

Qualifications

Proven experience in backend development using Node.js. Strong understanding of API design and performance optimization. Experience with microservices architecture and distributed systems. Ability to work independently and manage projects effectively in a remote setting. Knowledge of security best practices in software development.

About the job

Jobgether is looking for a Senior Backend Developer specializing in Node.js for a partner company based in France. The engineering team creates and maintains backend systems that support digital financial products used worldwide.

What you will do

Design, build, and maintain secure, scalable backend services with Node.js
Improve the core platform architecture to enable new features and products
Optimize API performance and ensure reliability
Help strengthen infrastructure resilience and system uptime
Promote technical innovation within the team
Tackle complex challenges in real-time systems, microservices, and distributed applications

How work happens

This is a remote-first role. The team works across regions, giving members autonomy and ownership over their projects. Collaboration with skilled engineers is central, with flexibility to manage personal workflows.

Who thrives here

Backend developers with solid Node.js experience
Engineers committed to building secure, scalable, and highly available systems
Problem-solvers who enjoy working on distributed, real-time environments
People motivated by making an impact on products used around the globe

About Jobgether

Jobgether connects talented professionals with innovative companies. Our partner companies are leaders in their fields, offering exciting opportunities for career growth in a supportive environment.

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Senior Backend Developer - Node.js

Jobgether

Full-time|Remote|France

Role overview Jobgether is looking for a Senior Backend Developer specializing in Node.js for a partner company based in France. The engineering team creates and maintains backend systems that support digital financial products used worldwide. What you will do Design, build, and maintain secure, scalable backend services with Node.js Improve the core platfor…

Apr 28, 2026

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Senior Node.js Backend Developer

Jobgether

Full-time|Remote|France

Jobgether is seeking a Senior Node.js Backend Developer to join a partner company specializing in global digital finance services. This role is based in France and follows a remote-first approach, offering flexibility in where you work within the country. Key Responsibilities Design and implement secure, scalable backend systems using Node.js Develop and maintain real-time services and APIs that support financial products Collaborate with engineers in different regions to deliver products for a worldwide customer base Contribute to backend architecture decisions, distributed systems, and performance improvements Support the evolution of infrastructure for digital finance solutions Requirements Extensive experience in Node.js backend development Proven ability to build secure, scalable, and high-performance systems Comfort working in distributed teams and across time zones Interest in tackling complex technical challenges and adopting new technologies Appreciates autonomy, ownership, and ongoing improvement Work Environment Remote-first setup with the option to work anywhere in France Collaborative engineering team focused on innovation and meaningful impact

Apr 28, 2026

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Senior TypeScript Fullstack Developer - Backend Focus

lemlist

Full-time|On-site|Toulouse

About Us At lemlist, we are revolutionizing sales engagement. Our platform empowers sales teams with an unparalleled advantage, enabling them to book more meetings and close deals effectively. Bootstrapped since inception, we have achieved remarkable growth, reaching $43M ARR in just 7 years, all without external funding. Today, as a profitable B2B SaaS company valued at $150M, we proudly serve over 40,000 sales teams globally.We are on the lookout for a passionate and skilled Senior Fullstack TypeScript Developer to join our dynamic team. In this role, you will take the lead in designing and implementing innovative features for our SaaS products, primarily utilizing Node.js.Your Responsibilities:Design and create new features from the ground up, enhancing both frontend and backend functionalities.Refine and improve the existing codebase through refactoring, bug fixes, and performance optimization.Manage multiple projects concurrently with efficiency.Assist the customer support team by resolving technical issues promptly.Promote knowledge sharing within the team through mentoring and training fellow developers.Key Achievements:By 3 Months:Successfully onboarded and integrated into the team.Gained a comprehensive understanding of our B2B SaaS products and their technical needs.Contributed significantly to new feature development and enhancements to our codebase.By 12 Months:Played a pivotal role in delivering multiple successful projects.Made substantial contributions to the optimization and scalability of our software products.What Awaits You:Join a profitable and fast-growing company that thrives without relying on external funding.Enjoy the opportunity to make a significant impact on innovative products that are transforming various industries.

Jul 4, 2025

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Senior Fullstack Developer (React.js/Node.js) - Frontend Focused - Fully Remote

lemlist

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About Us Lemlist is a leading sales engagement platform designed to empower sales teams with the competitive edge they need to succeed. Since our inception, we have achieved remarkable growth, rising from zero to $43 million in annual recurring revenue in just seven years, all without external funding. Today, we are a profitable B2B SaaS company valued at $150 million, serving over 40,000 sales teams around the globe to secure more meetings and close more deals.We are currently seeking a Senior Fullstack TypeScript Developer to join our dynamic team. In this role, you will be instrumental in designing and implementing innovative features for our SaaS products. We are looking for someone who is passionate, self-driven, and thrives on technical challenges, with a strong focus on Node.js development.Your Primary Responsibilities Include:Crafting and developing new features from the ground up, particularly focusing on the frontend aspects.Independently enhancing user experience and product functionality through feature development.Refactoring, debugging, and optimizing the existing codebase.Collaborating with other senior frontend engineers on our React migration project.Managing multiple projects concurrently.Facilitating knowledge transfer by mentoring fellow developers on your areas of expertise, thereby boosting team efficiency.Key Milestones:Within 3 months you will:Have successfully onboarded and become an integral part of the team.Develop a comprehensive understanding of our B2B SaaS products and their technical specifications.Contribute to the creation of new features and improvements to our existing codebase.Within 12 months you will:Play a pivotal role in the successful development and delivery of multiple projects.Make substantial contributions to enhancing the optimization and scalability of our software solutions.What’s in it for You?Be part of a profitable, self-sustaining, and rapidly growing company that prioritizes innovation over external funding.

Feb 9, 2026

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Senior Backend Developer (H/F)

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Full-time|On-site|Paris

About Us Safran.AI, previously known as Preligens, is a subsidiary of Safran Electronics & Defense, offering cutting-edge artificial intelligence solutions for analyzing high-resolution satellite images, full motion video (FMV) streams, and acoustic signals. Our innovative technologies are employed across aerospace, defense, and government applications. Since our inception in 2016, we have developed complex algorithms and software that automatically analyze, detect, and identify military-relevant objects from commercial and government data. Joining Safran in September 2024, Safran.AI also plays a pivotal role in the group's transformation, applying AI solutions in the realm of Industry 4.0. For instance, our automated image analysis capabilities assist inspectors in identifying potential anomalies in critical components using digital imagery. At Safran.AI, innovation and the pursuit of a safer world are at the heart of our mission. By joining us, you will work alongside passionate, multidisciplinary teams (engineers, researchers, developers) who are among the most talented in the industry, all driven by a shared commitment to technological excellence. We foster a stimulating work environment that encourages creativity and initiative, where every idea is valued.

Nov 20, 2025

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Senior Java Backend Developer H/F

inetum2

Full-time|On-site|AIX EN PROVENCE

Join inetum2 as a Senior Java Backend Developer where you will play a pivotal role in developing high-quality, scalable software solutions. You will collaborate with cross-functional teams to enhance our backend systems and ensure optimal performance. Your expertise will be instrumental in driving innovation and implementing best practices within the development team.

Apr 30, 2026

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Veolia Environnement S.A.

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Join our dynamic Strategy Team as a Senior Backend Developer, where you will leverage your expertise to drive innovative solutions and enhance our technological frameworks. In this pivotal role, you will collaborate with cross-functional teams to design, implement, and optimize backend services that support our strategic objectives.

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Senior Backend Engineer - Innovate

Yubo

Full-time|Remote|Paris - Full Remote

About UsAt Yubo, we are revolutionizing the way individuals connect online through our innovative Social Discovery app. By removing likes and follows, we empower our users to form authentic relationships and express their true selves.We have pioneered a fresh approach for Generation Z to engage socially in the digital realm, currently serving millions of active users. Our mission is to continuously redefine how social connections are formed now and in the future.Our team is diverse, multicultural, and passionately dedicated to our vision. As a leading platform for online socialization, we prioritize creating a safe digital environment for our community. Safety is ingrained in our values, and we proactively work on user protection, support, and education, collaborating with the tech industry and NGOs to establish best-in-class child protection standards.Join us on this exciting journey and play a vital role in shaping the future of social interactions!Role OverviewAs we expand our Tech organization for 2026, Yubo is launching a new Innovate squad dedicated to daring product initiatives and high-stakes projects.This squad aims to take bold risks, experiment with ambitious features, and validate ideas through ongoing testing.We are seeking a Senior Backend Engineer to become a key member of our Backend Experience team, reporting directly to Armand, our Engineering Manager.You will work within a multi-disciplinary squad (including Product, Mobile, Design, and Data) alongside a Senior Backend Engineer who shares leadership responsibilities.Your mission? Design, implement, and manage high-risk backend experiments that test groundbreaking product ideas while ensuring our systems remain resilient, scalable, and cost-effective throughout rapid iteration cycles.This position is not about maintenance; it's focused on building, testing, rolling back, iterating, and learning swiftly.

Feb 24, 2026

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Fullstack Developer (Node.js/PHP) (M/F)

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Join a vibrant and tech-savvy team at Centreon where collaboration and innovation drive our philosophy. As a Fullstack Developer specializing in Node.js and PHP, you will contribute to the development and enhancement of our cloud-optimized backend applications. Your responsibilities will include crafting high-performance APIs, ensuring service scalability, and automating deployments. You will also play a pivotal role in maintaining the stability of our PHP component within our ecosystem.On the frontend, your contributions will be vital in evolving our identity and access management component. You will be involved throughout the project's lifecycle, from design to production.Key Responsibilities:Design and develop backend applications using Node.js and PHP.Oversee the design and evolution of frontend environments.Engage in the architecture and design of new features.Write clean, maintainable, and well-documented code.Collaborate with frontend teams to integrate APIs and ensure a seamless user experience.Participate in code reviews and unit testing to maintain code quality.Contribute to the continuous improvement of development processes.Maintain and optimize existing applications.Work with SRE teams for deployment and maintenance of applications.Stay updated with the latest trends and technologies in backend and frontend development.Technical Stack: Node.js, Nest.js, TypeScript, PHP, Linux, AWS, Terraform, Docker, Git, ArgoCD, Helm

Mar 24, 2026

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Senior Back-End Developer Node.js - Payment Team (H/F)

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Located in the bustling heart of Paris, Winamax is revolutionizing the online gaming industry. As the leading poker and sports betting platform in France, we boast a community of 350,000 players and 600,000 bettors each month. Our presence extends to Spain, Germany, and soon, Italy and Portugal. We are committed to providing our players with an extraordinary experience that is technical, creative, and high-quality. Innovation, unity, and belonging are the core values that shape our unique and multicultural corporate culture.Are you ready to shape the future of gaming?From a technical perspective, Winamax offers:• A powerful and innovative gaming engine: dynamic game offering adaptation, highly configurable poker games, and fraud detection.• A distributed and scalable architecture designed for real-time processing of platform flows.• A modular platform that meets high availability and data security requirements, capable of managing heavy traffic.ABOUT THE POSITIONTo support Winamax’s growth and the increasing number of design projects, we are looking for a Fullstack Developer with a strong Back-End focus (Node, React).As part of the Operator team, you will design and develop applications for managing our online gaming operations, specifically within the payment vertical.Your responsibilities will include:• Integrating new partners and payment methods.• Maintaining and evolving existing code to ensure compliance with regulations (including PCI DSS standards).• Harmonizing and optimizing historical code for improved maintainability and performance.• Developing internal tools for the fraud prevention and customer support teams.Our preferred environment, ideally yours as well:• NodeJS, React, PHP• Object-oriented programming / TDD / DDD• MySQL, Relational model, stored procedures, triggers, integrity constraints

Dec 11, 2024

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