anton@terathreshold: ~/resume — zsh ↩ clean ⤓ pdf
anton@bayarea:~/resume$ whoami

Anton Vakulchyk

Senior Staff Software Engineer · Backend & Distributed Systems
San Francisco Bay Area · anton@vakulchyk.com · 415-825-0710 · linkedin.com/in/antonvakulchyk
anton@bayarea:~/resume$ cat summary.txt

Senior staff–level engineer with ~20 years architecting backend and distributed systems — high-throughput APIs, data pipelines, and cloud infrastructure — across healthcare, e-commerce, consumer mobile, and workplace SaaS. Two-time engineering manager who returned to deep IC work, driving system-level design, correctness under concurrency, and pragmatic delivery across teams. Most recently founded and built an AI platform end to end (Go/AWS, applied ML, native iOS) — pairing architectural breadth with hands-on depth.

anton@bayarea:~/resume$ ./experience --all
Founder & Engineer · TeraThreshold Feb 2023 – Present
San Francisco, CA
  • Building an AI platform that turns raw Garmin data into running-form analysis, injury-risk scoring, and daily readiness — architecting the system, the models, and the iOS product end to end.
  • Designed an idempotent ingestion pipeline (Go, Kafka, DynamoDB) for out-of-order, at-least-once webhooks; used atomic set operations and compound conditional writes to eliminate concurrent-writer races and double-counting.
  • Engineered a simulation clock injected across all services, separating replayable business time from wall-clock time — cutting multi-day pipeline verification to seconds and failing loudly on misconfiguration.
  • Built a multi-pathway injury-risk model (acute:chronic load, monotony, recovery) and effort-zone segmentation via a hidden semi-Markov model with Viterbi decoding; shipped a native SwiftUI app with StoreKit 2 and push-driven sync.
Senior Software Engineer · Envoy Oct 2019 – Jan 2023
San Francisco, CA
  • Architected a centralized GraphQL gateway (Kotlin) federating dozens of internal REST APIs — resolving N+1 and over-fetching to give teams a unified, low-latency graph.
  • Designed core data-privacy infrastructure (PII lifecycle, enterprise compliance) for Envoy Protect & Visitors; led Ruby on Rails backend for Envoy Desks (concurrent booking/availability).
  • Re-architected Workplace Analytics ETL (dbt, DMS, Redshift, Kubernetes) to absorb usage surges and generate reliable daily analytics without impacting transactional databases.
Senior Software Engineer · Razer Sep 2018 – Oct 2019
San Francisco, CA
  • Architected highly available microservices (Node.js, TypeScript, Java) powering the software ecosystem for Razer Phone & Razer Phone 2; designed GraphQL APIs tuned for mobile/cellular.
  • Integrated Elasticsearch for high-speed search, content delivery, and telemetry; containerized services with Docker, Helm, and Kubernetes on AWS with auto-scaling for launch spikes.
Senior Software Engineer · HotSchedules Aug 2017 – Sep 2018
San Francisco, CA
  • Architected non-blocking, event-driven JVM microservices (Vert.x) for real-time shift scheduling at high concurrency without thread-blocking bottlenecks.
  • Engineered Node.js APIs with polyglot persistence — DynamoDB, MongoDB, Redis; streamlined CI/CD on AWS with Jenkins and Puppet.
Engineering Manager → Senior Software Engineer · BuyerQuest May 2014 – Aug 2017
Cleveland, OH
  • Eng Manager (2016–2017): Led a cross-functional org of engineers, ETL specialists, and QA; standardized agile, modern tooling, and CI/CD, cutting onboarding time and lifting code quality.
  • Sr SWE (2014–2016): Architected high-volume B2B/B2C procurement on Magento Enterprise (Solr, cXML); built fault-tolerant ETL (CloverETL, Java); drove monolith→microservices (PHP Lumen, Java Jersey) and early AWS Lambda serverless.
Engineering Manager → Senior Software Engineer · Qure4u Sep 2010 – May 2014
Bradenton, FL
  • Eng Manager (2012–2014): Led a fully distributed engineering/QA team delivering critical healthcare-portal releases under strict compliance.
  • Sr SWE (2010–2012): Architected a high-traffic healthcare platform with secure SOAP/REST and HL7/EDI for EHR interoperability; AWS infra (EC2, RDS, VPC, SQS/SNS), RabbitMQ, Redis/Memcached, payment/SMS integrations.
Software Engineer · Soft-Ukraine Jul 2006 – Sep 2010
Dnipro, Ukraine
  • Migrated legacy applications to the Zend Framework; built reusable OO modules across Joomla, Drupal, Moodle, and WordPress.
  • Designed and tuned complex MySQL (stored procedures, triggers, indexing); built automated data-integration pipelines (XML/JSON/flat files); load-tested with JMeter.
anton@bayarea:~/resume$ ls skills/
languages/Go, Kotlin, Java, TypeScript/JavaScript, Ruby, PHP, Swift
backend-apis/Distributed Systems, Microservices, Event-Driven Architecture, GraphQL, REST, Vert.x, Ruby on Rails, Node.js
cloud-infra/AWS (Lambda, DynamoDB, Redshift, EC2, RDS, SQS/SNS, DMS), Kubernetes, Docker, Helm, Terraform
devops-observ/CI/CD Pipelines (GitHub Actions, Jenkins, Puppet), CloudWatch, Datadog, Structured Logging, Metrics & Monitoring
data/DynamoDB, PostgreSQL/MySQL, MongoDB, Redis, Elasticsearch, ETL/dbt, RabbitMQ
ai-ml/Applied ML, Time-Series Modeling, Hidden Markov Models, LLM/Agentic Application Design
mobile/SwiftUI, StoreKit 2, APNs, iOS Architecture (MVVM)
anton@bayarea:~/resume$ cat education.txt
M.S., Information Technologies & Computer Science // 2005–2008
National Metallurgical Academy of Ukraine
B.S., Programming for Computer Engineering & Computerized Systems // 2001–2005
Paton College of Welding and Electronics
anton@bayarea:~/resume$ exit
[Process completed]