Sr Software Engineer

Description

Sinch is pioneering the way the world communicates. More than 150,000 businesses - including Google, Uber, Paypal, Visa, Tinder, and many others - rely on Sinch's Customer Communications Cloud to power engaging customer experiences through mobile messaging, voice, and email.

Whether you need to verify users or craft omnichannel campaigns, Sinch makes it easy. Our AI-infused Super Network, APIs, and applications ensure you can connect with your customers reliably and securely, at every step of their journey.

At Sinch we "Dream Big", "Win Together", "Keep it simple", and "Make it Happen". These values are our foundation!

As a Senior Software Engineer, you will play a key role in designing and building the next generation of our Inbox Platform. You will work in a dynamic, collaborative environment to develop scalable distributed systems. Your contributions will directly impact the efficiency, performance, and safety of conversations at scale.

What You'll Do

• Design, develop, and maintain backend services for Inbox Platform, while contributing to our frontend applications.
• Build high-performance, scalable, and distributed systems.
• Work with Java, Spring, Kafka, SQL and NoSQL DBs to enhance our product, ensuring safety, efficiency, and responsiveness.
• Develop internal tools for monitoring, debugging, and optimizing applications at scale.
• Ensure observability, reliability, and fault tolerance across all services.
• Collaborate with cross-functional teams including Software Engineers, UX Designers and Product Managers.
• Maintain a strong focus on code quality, security, and best practices in software development.

This is a 95% remote role. You must be based in Spain and we will bring you to the office in Madrid for some days every quarter.

Requirements

What We Look For

• Production-level experience in backend development using Java.
• Deep understanding of distributed systems and experience building high-scale microservices and event-driven architectures.
• Strong background in database design and optimization, particularly with DynamoDB, Cassandra, PostgreSQL or other distributed databases.
• Experience with observability, logging, and monitoring tools for debugging and performance analysis.
• Familiarity with cloud platforms (AWS, GCP, or Azure) and containerized deployments (Docker, Kubernetes).
• A problem-solving mindset with the ability to debug complex distributed systems.
• Strong communication skills and the ability to work effectively in a collaborative environment.

Nice to Have

• Experience with modern Frontend frameworks like React and HTMX.
• Knowledge of message brokers like Kafka and RabbitMQ

Benefits

Sinch is a global company composed of people from different countries and cultures. Our benefits adjust regionally to support employees and help them to thrive in every stage of life. We offer valuable benefits and resources, including health and life insurance, a flexible work environment, retirement savings plans, and more.

The annual salary for this position is between between €60.000 until €80.000 Factors which may affect pay within this range may include skills, education, experience, and other qualifications

OUR HIRING PROCESS

We are committed to ensuring a recruitment process that is fair, objective, consistent, and inclusive. Our approach includes structured, competency-based interviews designed to evaluate your skills, experience, and qualifications relevant to the role. At times, we may include a data-driven assessment to enhance our hiring success and identify candidates likely to excel.

We believe in a two-way process and encourage you to ask questions throughout the journey. If this role isn't what you're looking for, please explore the other opportunities listed on our career page: https://www.sinch.com/careers/. No matter who you are, we hope you find an exciting path forward - hopefully with us!

Please send your CV in English language.