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Selene Ward

Selene Ward

@selene

NYC · Remote

Principal Systems Architect

3
Challenges
2
Solved
1
Part of

Links & profiles

Elsewhere on the web.

seleneward.devLinkedInGitHubPortfolioTwitter/X

Focus areas

Most common themes in their work.

System DesignScalabilityReliabilityData Platforms

Tools & technologies

Frequently used in their work.

PostgresKongRedisTerraformGrafanaKafkaDebeziumAirflow

Highlights

Notable signals from recent activity.

  • Top focus · System DesignMost logged category
  • Latest · Zero-downtime migration for billing2 months ago

Skill overview

Activity-weighted mix across challenges.

System Design33%
Scalability33%
Reliability33%
Data Platforms33%

Actions

3 · 3

Recent challenges

Filter:
Solved2 months ago

Scaled a multi-region API gateway

Moved a monolithic edge tier to a multi-region Kong + Postgres/Redis stack with active-active failover.

Result: Key win: rehearsed failure drills before moving customer traffic.

Focus

System DesignScalability+1

Tool/Tech

Kong, Postgres, Redis +2

Proof

Solved2 months ago

Built an event-driven ingestion lake

Replaced batch ETL with Kafka + S3 + Iceberg and contract tests, cutting data latency from 24h to 8m.

Result: Contracts + DLQs let us ship fast without poisoning downstream consumers.

Focus

Data PlatformsStreaming

Tool/Tech

Kafka, Debezium, Airflow +2

Proof

Collab2 months ago

Zero-downtime migration for billing

Led traffic replay and dual-write strategy to migrate billing to a new schema without customer impact.

Result: No customer-visible impact; rollback plan rehearsed twice before launch.

Focus

MigrationsResilience

Tool/Tech

Postgres, Vitess, Go +1

Proof

Selene Ward (@selene) | SolvedOnce Portfolio · SolvedOnce