Senior Software Engineer - Backend & Scalability (Lisbon)

At Datadog, we’re building the platform that enables engineers to monitor, secure, and scale their infrastructure and applications - powering reliability and performance across thousands of companies. We ingest trillions of data points each day and tackle challenges of scale, speed, and resilience.

We’re looking for experienced backend engineers who want to take ownership of critical services and deepen their expertise in distributed systems. Whether you've built APIs, pipelines, or backend tooling, this role is a chance to grow your impact while learning how to design and operate high-scale, high-availability systems that support observability and security products used by engineers around the world.

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 build reliable backend services that handle high-throughput, globally distributed workloads
• Own core components that power products relied on by thousands of engineering teams worldwide
• Collaborate with other experienced engineers to evolve system architecture with a focus on scalability and resilience
• Learn and apply distributed systems design patterns in a production setting
• Ship production-grade code in languages like Go, Python, or Java
• Contribute to team culture through code reviews, architecture discussions, and mentorship of peers and junior engineers

Who You Are:

• You have 5+ years of experience building backend software in production, using languages like Go, Python, Java, C++, or Rust
• You’ve contributed to the design and development of backend services or APIs, and enjoy solving real-world engineering problems
• You’ve had some exposure to distributed systems (e.g., fault tolerance, messaging, scalability) and are excited to deepen your expertise
• You write clean, maintainable code and approach system design with thoughtfulness and curiosity
• You’re collaborative and eager to grow your impact by working on high-scale, high-reliability systems
• You’re excited about leveraging AI tools to enhance how you code, solve problems, and build – or eager to learn how

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.

Why Join:

• Work with talented engineers who will support your growth in distributed systems and large-scale software design
• Participate in impactful projects from day one with the autonomy to make technical decisions
• Grow your career with access to mentorship programs, internal mobility, and continuous development resources

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)
• Access to Inclusion Talks, our Internal panel discussions
• Free, global mental health benefits for employees and dependents age 6+
• Competitive global benefits

Benefits and Growth listed above may vary based on the country of your employment and the nature of your employment with Datadog.