Senior Software Engineer

See yourself at Twilio

Join the team as Twilio's next Staff Software Engineer

About the job

This position is needed to harden, optimize, and scale the real-time event-aggregation services that power our Observability Insights/Analytics platform.

We are seeking a Senior Software Engineer with solid Java expertise to help deliver a high-throughput stream-processing microservices (Kafka Streams / Flink) deployed on AWS EKS, tune ClickHouse for millisecond-latency writes, and embed observability that keeps incident minutes near zero. You will design resilient, high-performance systems capable of processing >250K events/sec with p99 latencies under 200ms, while championing DevSecOps practices and mentoring junior engineers.

Responsibilities

In this role, you'll:

• Design, build, and maintain high-performance Java microservices using Spring Boot, capable of ingesting >250K events/sec with p99 < 200 ms
• Implement stateful stream-processing pipelines (Kafka Streams / Apache Flink) with idempotent replays, exactly-once semantics, and schema-evolution tooling
• Optimize ClickHouse schemas, partitioning, and materialized views to support multi-region, sub-second queries for Early Warning System (EWS) detectors
• Embed OpenTelemetry instrumentation and ship comprehensive metrics/traces/logs to Datadog and Grafana with SLI/SLO dashboards
• Implement DevSecOps best practices including Terraform automation, CI/CD pipelines, Kubernetes orchestration, AWS infrastructure (EKS, MSK, S3), and compliance guardrails (HIPAA, SOX, GDPR)
• Leverage best-in-class development productivity practices including AI-powered tooling to accelerate delivery and code quality
• Mentor junior engineers as necessary and participate in rigorous code/design reviews to elevate team standards and foster knowledge sharin

Qualifications

Twilio values diverse experiences from all kinds of industries, and we encourage everyone who meets the required qualifications to apply. If your career is just starting or hasn't followed a traditional path, don't let that stop you from considering Twilio. We are always looking for people who will bring something new to the table!

*Required:

• 5+ years of professional Java development experience with mastery of high-performance and low-latency design patterns
• Production experience with Kafka Streams, Flink, or comparable stream-processing frameworks for building real-time data pipelines
• Hands-on ClickHouse (or columnar database) performance tuning and SQL optimization expertise
• Proven success operating AWS-hosted microservices of moderate to complex scope with solid Linux, Docker, and Kubernetes knowledge
• Strong observability mindset including metrics, tracing, alerting, and post-incident analysis capabilities
• Excellent communication skills and a bias toward collaborative problem-solving in cross-functional team environments

Desired:

• Experience migrating single-region services to multi-region active-active topologies for high availability
• Familiarity with data-privacy controls including PII tokenization and field-level encryption
• Previous work in telecom, real-time analytics, or compliance-sensitive domains
• Contributions to open-source Java or streaming projects demonstrating community engagement

Location

This role will be based in our Dublin, Ireland office.

Travel

We prioritize connection and opportunities to build relationships with our customers and each other. For this role, you may be required to travel occasionally to participate in project or team in-person meetings.

What We Offer

Working at Twilio offers many benefits, including competitive pay, generous time off, ample parental and wellness leave, healthcare, a retirement savings program, and much more. Offerings vary by location.