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.

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

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Datadog Learning Center.

Equal Opportunity At Datadog

Datadog is proud to offer

Equal Employment Opportunity

to everyone regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity, veteran status, and other characteristics protected by law. We also consider qualified applicants regardless of criminal histories, consistent with legal requirements. Here are our

Candidate Legal Notices

for your reference.

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Any information you submit to Datadog as part of your application will be processed in accordance with Datadog’s

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