Backend Engineer (Infra), Core Sending

Accountabilities:

• Design and evolve the architecture supporting millions of daily API requests and large-scale email delivery workloads.


• Build and scale backend infrastructure capable of processing tens of millions of emails per day with high availability.


• Develop and optimize distributed systems, including asynchronous pipelines (queues, streams, retries, idempotency, DLQs).


• Improve system reliability through high availability design, disaster recovery planning, and fault tolerance strategies.


• Manage and scale data systems such as Postgres and ClickHouse to ensure performance and reliability under heavy load.


• Enhance observability using monitoring and alerting tools (e.g., Datadog) to ensure system health and performance.


• Develop Infrastructure as Code (IaC) solutions using tools such as Terraform and CDK.


• Work with TypeScript and Go to build and maintain core backend services.


• Participate in on-call rotations to support and resolve critical production issues.

Requirements

• 8+ years of backend engineering experience with a strong focus on cloud infrastructure and distributed systems.


• Proven experience designing and operating large-scale systems on AWS or similar cloud platforms.


• Strong expertise in event-driven architectures using tools such as Kafka, SQS, SNS, or equivalent technologies.


• Deep understanding of scalable system design, high availability, and performance optimization.


• Experience working with high-throughput systems and production-grade backend services.


• Strong programming skills in backend languages, ideally TypeScript and/or Go.


• Ability to work autonomously in ambiguous, fast-moving environments with a “default to action” mindset.


• Strong communication skills in English and ability to collaborate effectively across distributed teams.


• Comfortable participating in on-call rotations and handling production incidents.


• Low-ego, hands-on engineer with strong ownership and problem-solving mindset.


• Experience with email infrastructure or messaging systems is a plus.

• Fully remote work within Americas or European time zones.


• Competitive compensation ranging from approximately $150,000–$170,000 USD, based on experience.


• Flexible working schedule with high autonomy and ownership.


• Opportunity to work on high-scale infrastructure used by millions of developers globally.


• Modern tech stack with a strong focus on engineering quality and developer experience.


• Remote-first, distributed team culture with international collaboration.


• Participation in team off-sites, conferences, and meetups.


• High-impact role with direct ownership of core production systems and architecture decisions.

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