דרושים » תוכנה » Backend Developer (Nodejs)

We are looking for a Staff Backend Developer to join our Ads team, where we build the real-time systems that power our global advertising platform. This is a high-scale, low-latency environment - processing billions of requests daily to deliver fast, relevant ads to players around the world. Our backend infrastructure is designed for reliability and scalability, ensuring seamless ad delivery and optimal performance even under heavy traffic. As part of the team, you will work on distributed systems that handle real-time ad requests, impression tracking, and user data analytics with strict requirements for uptime and security. You'll play a critical role in optimizing performance, maintaining service availability, and supporting the development of new monetization features for game developers worldwide. Security, data privacy, and a positive user experience are central to everything we build.
You'll help modernize the legacy tech stack and the core services behind ad delivery, bidding, reporting, and analytics. This is a great opportunity for an engineer who's excited to work on performance-critical systems, collaborate across teams, and grow in a fast-paced environment, all at a turning point in the company.
What you'll be doing:
Design, build, and modernise backend services and APIs that support ad delivery
Work on scalable, high-availability systems used across our ads ecosystem
Collaborate with engineers, product managers, and data teams to deliver new features
Improve performance, observability, and cost-efficiency of current backend systems, modernising the legacy stack
Contribute to architectural decisions and technical direction of the platform.

We are seeking an exceptional Senior Backend Engineer to join our Platform Group, where you will architect and develop shared infrastructure components that power enterprise security and identity products. This is a highly collaborative role requiring both technical excellence and strong cross-functional partnership skills.

What You'll Do
As a Senior Backend Engineer on our Core Platform team, you will:

Design and build shared platform components used across multiple product teams, ensuring scalability, reliability, and maintainability

Architect distributed systems using microservices and event-driven patterns that support enterprise-scale workloads

Own critical backend services from conception through deployment, including code quality, performance optimization, and operational excellence

Collaborate extensively with product engineers, DevOps, and architects to define platform capabilities and technical standards

Mentor junior engineers through code reviews, pair programming, and technical guidance

Drive technical initiatives that improve developer productivity, system observability, and platform resilience

Contribute to architectural decisions and establish best practices for backend development across the organization

Analyze system performance and data patterns to identify optimization opportunities and inform future platform investments

We are looking for a Senior Backend Engineer to join our R&D team in developing the new rising product in the health landscape.

As a Senior Backend Engineer at Lumen, you will have an impact on how we architect, build, scale, and maintain our backend systems. You will provide technical guidance and mentorship to other engineers on the team, help establish and maintain best practices for development, and participate in the development of the companys technological roadmap. Youll solve complex engineering challenges and drive engineering excellence in a dynamic environment and rapidly increasing scale.

Our ideal candidate has a real passion for making a positive change in the world, for technology and customers, has great communication skills, and loves to constantly improve themselves, our working practices, and our code base.

This is a great opportunity to join the core team of a growing, successful startup and work with the most advanced technologies.



Responsibilities

Lead/Participate in system design and architecture discussions.
Implement and own infrastructure and features; be involved and impact the entire product lifecycle (concept, design, test, release, and production support).
Teach, mentor, grow, and provide advice to other domain experts and individual contributors.
Acquire an in-depth understanding of our technical challenges and strive to improve them.
Play a central role in technical, business, and organizational contributions.
Be a vocal advocate for technical excellence and help the team members make sound decisions.
Work with product managers, data scientists, and other team members to understand the desired requirements and provide your feedback to improve the outcome of the feature.

As a Backend Engineer, you build the scalable, resilient engine that powers the platform. Your mission is to design and implement high-performance services that handle massive scale, ensuring data integrity and system reliability for thousands of brands. Working within a product team, you will translate complex business logic into robust architectural solutions, ensuring that our infrastructure can scale as fast as our customers do.

Key Responsibilities

Distributed Systems Design: Design and build microservices and event-driven architectures that are resilient, scalable, and maintainable. You will make critical decisions on synchronous vs. asynchronous communication and data consistency.
Data Mastery: Manage the lifecycle of data across our platform. You will design efficient database schemas (SQL & NoSQL) and optimize query performance to handle high-throughput workloads.
Operational Excellence: Embrace the You Build It, You Run It philosophy. You will own your services in production, implementing observability (logging, tracing, metrics) to detect issues before our customers do.
API Craftsmanship: Build clean, secure, and well-documented APIs (REST/GraphQL) that serve as the contract between our backend services and the frontend experience.

As a Senior Platform Engineer (Backend), you will play a key role in shaping the core infrastructure and architecture of our platform. You will be deeply involved in hands-on development, contribute to technical design, and help drive engineering excellence. In this role, you will collaborate with other engineers, share best practices, and take part in building scalable, high-quality backend systems.

Your responsibilities
Design, develop, and test cloud-native microservices and backend components with high standards of scalability, reliability, and security.
Own key areas of the platform's infrastructure and contribute to the architecture of enterprise-grade systems.
Collaborate with engineering and product teams to translate business needs into robust technical solutions.
Work across a modern tech stack including cloud services, Linux, Docker, Kubernetes, and CI/CD pipelines.
Drive best practices in code quality, system design, observability (logs, metrics, tracing), and testing.
Stay up to date with emerging technologies and help evaluate tools that support platform evolution.
Share knowledge through code reviews and technical discussions, fostering a culture of continuous improvement.

we are looking for a Senior Infrastructure Engineer to work on our dedicated engineering team building processing pipelines, information storage systems, and presentation layers in support of intelligence analysts.

The collection, processing, and exploration of malware samples and other information at a large scale is at the core of the Intelligence mission The Intelligence Automation team is responsible for prototyping, building, and operating the systems that enable this mission, and we'd like you to join us!

Your job will be to build, maintain, and improve infrastructure to support the entire breadth of our teams activities. You will work on classical datacenter and cloud infrastructure as well as environments for malware sandboxing or world-wide threat monitoring and hunting.

Advancing our fast-paced intelligence mission, requirements sometimes shift rapidly, and projects can live anything from weeks to years depending on changes in the surrounding ecosystem. It will be your responsibility to provide an infrastructure that can keep up with and adapt to these changes.

Occasionally things inside or outside of your control break and you will use your debugging skills to pinpoint the issue no matter whether it is on a hardware, network, cloud, kernel, or user space level.

You will be responsible for all aspects of the infrastructure you design, build, and maintain. This includes gathering requirements, making technical choices, creating documentation, securing workloads, upskilling colleagues, proactively monitoring operations, and gathering feedback from stakeholders.

You will join a team of very experienced infrastructure engineers who will always have your back. However, as a remote employee on a team distributed across many regions and time zones, you will not have direct access to all of your co-workers for the entire workday. Thus, the ability to work unsupervised, communicate asynchronously, and take the initiative in maintaining lines of communication is crucial. Additionally, we are looking for someone who would like to be part of a team who are passionate about their work and go the extra mile to exceed expectations. We love enthusiastic individuals who bring a positive attitude to their work and really care about what they produce for our stakeholders.

What You'll Do:

Maintain a can-do attitude and be solution-oriented

Deliver on ambiguous assignments and quickly evolving requirements in a fast-paced environment

Design, implement, document, and maintain our multi-cloud infrastructure

Be a consultant to development teams to ensure smooth deployment, monitoring, and maintenance of applications and services

Develop and maintain infrastructure-as-code (IaC) and management automation tools

Secure traditional and AI workloads

Ensure high availability, scalability, and performance of our systems

Troubleshoot and resolve complex infrastructure issues

Deploy, monitor, and troubleshoot relational and NoSQL databases

Mentor junior engineers and contribute to knowledge sharing within the team

Stay up-to-date with industry trends, best practices, and emerging technologies

Judge security and compliance risk

As a Senior Full-Stack Engineer, youll be at the forefront of building and scaling our product from the ground up. Youll work closely with your team, as well as a product and product designer, to design and implement both the front-end user experience and back-end logic that powers our platform.

Youll play a key role in creating modern UI components, building API services, and contributing to core architectural decisions in a high-impact, low-ego team environment.

What youll do:

Design and implement scalable Senior Full Stack Engineer features and components using NodeJS and React.

Build and maintain robust APIs and data pipelines to support the platform.

Collaborate closely with product, design, and engineering leadership on architecture and UX.

Participate in code reviews, testing, CI/CD, and overall platform improvements.

Bring creativity, curiosity, and best practices to everything you build.

Were looking for a highly effective and experienced Backend Python Engineer with deep Python expertise to design and deliver scalable, resilient systems as part of a highly successful and collaborative engineering team.


In this role, you will work on highly innovative, next-generation security technologies within our Human Risk Management (HRM) product group. Human Risk Management is a comprehensive approach to cybersecurity that focuses on understanding, measuring, and mitigating risks associated with human behaviour across an organization.


You will contribute in technical design and code quality, and will be responsible for designing and building a new, large-scale analytics database from the ground up, forming a core foundation of our risk scoring and HRM capabilities. This is a hands-on role with meaningful ownership across the full software development lifecycle.


Your day-to-day:

Lead the design and development of core backend components of a large-scale SaaS platform using Python.

Design, build, and maintain RESTful APIs and highly available management services.

Design and implement scalable distributed systems and intelligent network data-path processing.

Design, build, and evolve a new large-scale analytics database from the ground up, responsible for ingesting high-volume security signals and calculating human risk scores at scale.

Champion engineering best practices, system reliability, and maintainable code.

Contribute to in-depth code reviews, architectural guidance, and mentoring of other engineers.

We are looking for a Backend Engineer who views AI not just as a tool, but as a fundamental shift in how we build software. You will be responsible for designing high-performance, distributed systems while leaning heavily into an AI-First engineering culture. This means automating everything that can be automated, leveraging LLMs for complex logic, and constantly evolving your workflow with the latest in AI-assisted development.
Responsibilities
Design and maintain robust, high-performance microservices using Node.js and TypeScript.
Integrate AI agents and LLMs (Cursor, Claude Code) into your daily flow to maximize velocity and code quality.
Own the full lifecycle of features-from system design and data modeling to deployment on AWS and monitoring at scale.
Architect and maintain distributed systems designed to handle millions of concurrent requests with sub-millisecond latency.

Were hiring an AI Backend Engineering Manager to guide and grow a high-impact ML team driving AI-powered innovation across Stamplis B2B SaaS platform. Youll lead the design and delivery of AI solutions while mentoring engineers and setting the technical direction for AI-first development at scale.

This is a leadership role with a balance of hands-on engineering and team management, perfect for someone who thrives on solving technical challenges, inspiring a team, and shaping the future of AI in fintech automation.

What You Will Do:
Lead & Mentor: Manage, mentor, and grow a team of AI/ML/Backend engineers, fostering technical excellence and career development.
Set Technical Direction: Define the ML strategy, ensuring best practices in architecture, frameworks, and operationalization.
Build and deploy AI-based solutions: Oversee the development and deployment of GenAI/LLM-powered solutions that address real-world challenges across Stamplis products.
Scale & Operationalize: Establish scalable ML infrastructure, CI/CD, observability, and data pipelines for high-availability production systems.
Collaborate Cross-Functionally: Partner with product managers, engineers, and business stakeholders, clearly communicate progress, challenges, and outcomes.