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1Datadog
Madrid, ES
Senior Software Engineer (Fullstack)
Datadog · Madrid, ES
React API Java Python Cloud Coumputing SaaS Excel Office
At Datadog, fullstack engineers build the end-to-end product experiences that power our observability platform. As a Senior Fullstack Engineer with a frontend focus, you´ll drive complex, user-facing features while contributing to the backend systems that support them. You´ll architect performant interfaces at scale, collaborating across disciplines to create seamless product experiences. This role is ideal for engineers who excel in frontend-led fullstack development and want to have deep ownership over product surfaces that impact customers directly.
At Datadog, we place value in our office culture - the relationships and collaboration it builds and the creativity it brings to the table. We operate as a hybrid workplace to ensure our Datadogs can create a work-life harmony that best fits them.
Disclaimer: This is not a strict 50/50 frontend-backend split. The exact balance varies by team, project, and product area, and may shift over time. You´ll regularly contribute across the stack, but the role is designed for engineers who prefer and excel at frontend-led fullstack work.
At Datadog, we place value in our office culture - the relationships that it builds, the creativity it brings to the table, and the collaboration of being together. We operate as a hybrid workplace to ensure our employees can create a work-life harmony that best fits them.
What You´ll Do:
- Architect, build, and ship end-to-end product features-owning everything from frontend UI to backend logic, data modeling, and API design
- Drive technical excellence for the frontend experience, including performance, accessibility, responsiveness, and overall quality
- Collaborate with product managers, designers, and backend engineers to define user experiences, data flows, and APIs
- Improve the reliability and scalability of services that support your features, contributing backend code where needed
- Lead technical discussions, influence architecture decisions, and mentor other engineers on fullstack patterns and best practices
- Ensure strong testing coverage, clear documentation, and long-term maintainability across the stack
Who You Are:
- You have 6+ years of experience building and shipping production-grade fullstack features at scale
- Deep expertise in JavaScript/TypeScript and modern frontend frameworks (React preferred)
- Solid backend engineering skills with proficiency in at least one server-side language (e.g., Python, Go, Java) and familiarity with APIs, databases, and distributed systems
- Ability to interpret broad product requirements and translate them into polished, user-facing applications
- Strong understanding of frontend architecture, state management, performance tuning, and client-server interaction patterns
- Excellent communicator with the ability to lead design and architecture discussions in a collaborative, cross-functional environment
Datadog values people from all walks of life. We understand not everyone will meet all the above qualifications on day one. That´s okay. If you´re passionate about technology and want to grow your skills, we encourage you to apply.
Benefits and Growth:
- Generous and competitive benefits package
- New hire stock equity (RSUs) and employee stock purchase plan
- Continuous career development and pathing opportunities
- Employee-focused best in class onboarding
- Internal mentor and cross-departmental buddy program
- Friendly and inclusive workplace culture
Benefits and Growth listed above may vary based on the country of your employment and the nature of your employment with Datadog.
About Datadog:
Datadog (NASDAQ: DDOG) is a global SaaS business, delivering a rare combination of growth and profitability. We are on a mission to break down silos and solve complexity in the cloud age by enabling digital transformation, cloud migration, and infrastructure monitoring of our customers´ entire technology stacks. Built by engineers, for engineers, Datadog is used by organizations of all sizes across a wide range of industries. Together, we champion professional development, diversity of thought, innovation, and work excellence to empower continuous growth. Join the pack and become part of a collaborative, pragmatic, and thoughtful people-first community where we solve tough problems, take smart risks, and celebrate one another.
Datadog
Madrid, ES
Senior Software Engineer (Frontend)
Datadog · Madrid, ES
React Cloud Coumputing SaaS Office
Datadog´s Product Engineering teams build the interfaces that customers rely on to observe, monitor, and troubleshoot their systems in real time. As a Senior Frontend Engineer, you´ll lead the development of complex UI features used daily by hundreds of thousands of users across our core observability products. You´ll collaborate cross-functionally to shape the user experience, own architectural decisions, and continuously improve the performance and accessibility of our frontend systems. This is an opportunity to work at scale, influence product direction, and mentor others in a high-ownership, growth-oriented environment.
At Datadog, we place value in our office culture - the relationships and collaboration it builds and the creativity it brings to the table. We operate as a hybrid workplace to ensure our Datadogs can create a work-life harmony that best fits them.
To give you a quick overview of some of our frontend product focus areas, you can explore the Digital Experience Monitoring suite that includes RUM (improves frontend performance with proactive insights into user behavior), Error Tracking (groups and prioritizes application errors), and Synthetic Monitoring (automatically tests your apps and APIs to catch issues before users do).
At Datadog, we place value in our office culture - the relationships that it builds, the creativity it brings to the table, and the collaboration of being together. We operate as a hybrid workplace to ensure our employees can create a work-life harmony that best fits them.
What You´ll Do:
- Design, build, and deliver scalable frontend features for Datadog´s core observability products
- Collaborate with product managers, designers, and backend engineers to define user experiences, data flows, and APIs
- Lead technical discussions and contribute to long-term architectural decisions
- Improve performance, reliability, and accessibility of user-facing applications
- Set and uphold high standards for code quality, testing, and maintainability
- Mentor other engineers and promote frontend engineering best practices across the team
Who You Are:
- You have 6+ years of experience building production-grade frontend applications at scale
- You bring deep expertise in JavaScript/TypeScript and modern frameworks such as React
- You have strong knowledge of frontend architecture, performance optimization, and browser fundamentals
- You´ve taken major features from concept to launch with minimal supervision
- You´re an effective communicator who can influence technical direction
- You prioritize user experience and have an eye for UI quality and detail
Datadog values people from all walks of life. We understand not everyone will meet all the above qualifications on day one. That´s okay. If you´re passionate about technology and want to grow your skills, we encourage you to apply.
Benefits and Growth:
- Generous and competitive benefits package
- New hire stock equity (RSUs) and employee stock purchase plan
- Continuous career development and pathing opportunities
- Employee-focused best in class onboarding
- Internal mentor and cross-departmental buddy program
- Friendly and inclusive workplace culture
Benefits and Growth listed above may vary based on the country of your employment and the nature of your employment with Datadog.
#LI-VG1
About Datadog:
Datadog (NASDAQ: DDOG) is a global SaaS business, delivering a rare combination of growth and profitability. We are on a mission to break down silos and solve complexity in the cloud age by enabling digital transformation, cloud migration, and infrastructure monitoring of our customers´ entire technology stacks. Built by engineers, for engineers, Datadog is used by organizations of all sizes across a wide range of industries. Together, we champion professional development, diversity of thought, innovation, and work excellence to empower continuous growth. Join the pack and become part of a collaborative, pragmatic, and thoughtful people-first community where we solve tough problems, take smart risks, and celebrate one another.
Datadog
Madrid, ES
Staff Software Engineer - RUM Platform
Datadog · Madrid, ES
Java Cloud Coumputing SaaS Redis Kafka Office
We´re looking for a Staff Engineer to join the RUM (Real User Monitoring) Platform team within Datadog´s DEM (Digital Experience Monitoring) pillar. In this role, you´ll lead foundational engineering work that enables scalable, cross-product integrations across critical observability features such as session replay, error tracking, feature flags, and product analytics. You´ll work hands-on to bring clarity to complex systems, drive architectural convergence, and build bridges across teams. As the first Staff Engineer dedicated to this platform effort, you´ll shape both the technical vision and execution across multiple products-and unlock rapid innovation for years to come.
At Datadog, we value our office culture - the relationships and collaboration it builds and the creativity it brings. We operate as a hybrid workplace to ensure our Datadogs can create a work-life harmony that best fits them.
What You´ll Do:
- Design and evolve platform infrastructure that supports frontend observability products across DEM, including RUM, session replay, feature flags, and product analytics.
- Build and scale data pipelines and reducers using technologies such as Kafka and Redis to ingest, transform, and serve real-time user experience data.
- Partner with SDK, FE and OpenTelemetry contributors to support a growing number of data platforms and open standards in frontend instrumentation.
- Guide cross-functional collaboration by identifying shared patterns and unifying backend infrastructure across multiple product lines.
- Solve ambiguous, high-impact technical problems by applying deep systems knowledge and delivering clear architectural direction.
- Serve as a technical leader and mentor within the RUM organization and broader engineering community at Datadog.
Who You Are:
- Experienced in building scalable, distributed backend systems using technologies such as Kafka, Redis, and Java.
- Comfortable managing complex data pipelines and translating diverse data sources into semantically aligned, actionable insights.
- Skilled at navigating ambiguity and driving clarity across multiple teams and product surfaces.
- Familiar with open standards in observability, such as OpenTelemetry, and excited to contribute to a broader ecosystem.
- Proactive and hands-on-you´re ready to dive into unclear problem spaces and turn them into reliable, performant systems.
Datadog values people from all walks of life. We understand not everyone will meet all the above qualifications on day one. That´s okay. If you´re passionate about technology and want to grow your skills, we encourage you to apply.
Benefits and Growth:
- New hire stock equity (RSUs) and employee stock purchase plan (ESPP)
- Continuous professional development, product training, and career pathing
- Intradepartmental mentor and buddy program for in-house networking
- An inclusive company culture, ability to join our Community Guilds (Datadog employee resource groups)
- Competitive global benefits
- Giving programs
Benefits and Growth listed above may vary based on the country of your employment and the nature of your employment with Datadog.
About Datadog:
Datadog (NASDAQ: DDOG) is a global SaaS business, delivering a rare combination of growth and profitability. We are on a mission to break down silos and solve complexity in the cloud age by enabling digital transformation, cloud migration, and infrastructure monitoring of our customers´ entire technology stacks. Built by engineers, for engineers, Datadog is used by organizations of all sizes across a wide range of industries. Together, we champion professional development, diversity of thought, innovation, and work excellence to empower continuous growth. Join the pack and become part of a collaborative, pragmatic, and thoughtful people-first community where we solve tough problems, take smart risks, and celebrate one another.
Datadog
Madrid, ES
Senior Software Engineer (Frontend)
Datadog · Madrid, ES
React Cloud Coumputing SaaS Office
Datadog´s Platform & Developer Experience teams build the foundational tools and systems that support every part of our product. As a Senior Frontend Engineer, you´ll design and maintain shared UI libraries, build pipelines, design systems, and developer tooling that hundreds of engineers rely on daily. You´ll work closely with frontend engineers across the company to understand their day-to-day workflows, identify pain points, and uncover opportunities for new features and improvements. Through this collaboration, your work will improve reliability, performance, and engineering velocity at scale, while helping shape how frontend code is written, tested, and shipped company-wide.
At Datadog, we place value in our office culture - the relationships and collaboration it builds and the creativity it brings to the table. We operate as a hybrid workplace to ensure our Datadogs can create a work-life harmony that best fits them.
To give you a quick overview of some of the areas our frontend core teams focus on: our Design Ops team works on our design system, Druids; our Frontend DevX team builds the foundations that all frontend product teams at Datadog rely on; and our Frontend Framework team owns Datadog´s core frontend platform, powering the UI, toolkit, packages, and more.
At Datadog, we place value in our office culture - the relationships that it builds, the creativity it brings to the table, and the collaboration of being together. We operate as a hybrid workplace to ensure our employees can create a work-life harmony that best fits them.
What You´ll Do:
- Design and implement core frontend platform components including shared UI libraries, build systems, and performance tooling
- Develop and maintain internal developer tools that accelerate engineering workflows and promote consistency
- Lead architectural decisions for frontend infrastructure with a focus on scalability and developer experience
- Establish and promote best practices for testing, accessibility, performance, and frontend standards
- Build CI/CD tooling, local development environments, and automation that support fast and reliable code delivery
- Mentor engineers and serve as a technical leader for frontend tooling and platform design
Who You Are:
- You have 6+ years of experience building large-scale frontend systems, ideally in platform or developer experience roles
- You´re an expert in JavaScript/TypeScript and modern frontend frameworks such as React
- You have deep experience with modern frontend build tools, bundlers (e.g., Rspack, esbuild, Lage), and CI/CD workflows
- You´ve built internal tools, component libraries, or design systems for large engineering organizations
- You can lead cross-team initiatives and influence adoption of platform standards
- You´re focused on reliability, performance, and enabling efficient developer workflows via thoughtful developer experience
Datadog values people from all walks of life. We understand not everyone will meet all the above qualifications on day one. That´s okay. If you´re passionate about technology and want to grow your skills, we encourage you to apply.
Benefits and Growth:
- Generous and competitive benefits package
- New hire stock equity (RSUs) and employee stock purchase plan
- Continuous career development and pathing opportunities
- Employee-focused best in class onboarding
- Internal mentor and cross-departmental buddy program
- Friendly and inclusive workplace culture
Benefits and Growth listed above may vary based on the country of your employment and the nature of your employment with Datadog.
About Datadog:
Datadog (NASDAQ: DDOG) is a global SaaS business, delivering a rare combination of growth and profitability. We are on a mission to break down silos and solve complexity in the cloud age by enabling digital transformation, cloud migration, and infrastructure monitoring of our customers´ entire technology stacks. Built by engineers, for engineers, Datadog is used by organizations of all sizes across a wide range of industries. Together, we champion professional development, diversity of thought, innovation, and work excellence to empower continuous growth. Join the pack and become part of a collaborative, pragmatic, and thoughtful people-first community where we solve tough problems, take smart risks, and celebrate one another. Learn more about #DatadogLife on Instagram, LinkedIn, and Datadog Learning Center.