Igor Derkach

Automotive startup. Senior-level role in connected device cloud platform team, fully remote. • Successfully implemented the contract-first development approach in multi-stack cloud, which made it easier to track the interfaces changes flow and sped up the code review. • Successfully migrated the company's vehicle telemetry from InfluxDB to Clickhouse, that significally increased the performance of cloud telemetry functionality. • Data engineering: implementing the data streaming pipelines (validation, cleaning, aggregation), prototyping. • Developed the data stream monitoring and alerting system for the vehicle fleet, allowing engineers to quickly respond the urgent incidents on prototype cars. • Designed from scratch and successfully implemented the libraries (Python and Go) commonly used by cloud teams. • Boosted the overall UI performance and text search up to dozens times by implementing the API gateway services and optimizing db queries. • Improved the performance (up to 10x) of vehicle filesystem access from the cloud. • Designed the new API documenting scheme, simplifying the whole release rollout process. • High-level cloud architecture design review in cooperation with architectural team • Onboarding new developers, mentorship • Maintained the legacy (Go, Python, C++), did some DevOps work. Key skills: ➔ Languages: Python (FastAPI, Pandas, Polars, Numpy), Golang, C++, SQL ➔ Technologies: Apache Kafka, Apache Flink, Clickhouse, MongoDB, PostgreSQL, Docker, Kubernetes, MQTT, RabbitMQ, Amazon AWS, Google Cloud (GCP), Polarion, Gitlab CI/CD, OpenAPI, AsyncAPI, Benthos, metrics, monitoring, unit testing ➔ Other: data engineering, ASPICE, SOA, agile, mentoring, architecture design, DevOps, IoT, Edge computing

Enterprise backup and disaster recovery provider company. Senior-level role in disaster recovery cloud unit, fully remote. • Developed the data prefetcher for network block device server (NBD), that significally reduced the latency of reading the linux network-connected block device in several use scenarios. • Maintained the company's disaster recovery solution services. Key skills: Golang, Linux, NBD, Python, Flask, Apache Cassandra, AWS DynamoDB, AWS S3, AWS EKS, Docker, Kubernetes, zfs, Redis.

Small outsource software company. Senior-level role, fully remote. • Developed from scratch the Household energy saving service with IoT sensors mesh, live telemetry and recommendations for a customer from Canada. My job was to gather requirements from customer, design overall architecture, implement the backend, set up the cloud infrastructure, write the sensors firmware, integrate everything together and deploy to production. ➔ Skills: Python, Flask, MongoDB, Celery, RabbitMQ, GCP, MQTT, Google IoT, Firebase, Arduino, ESP8266, Docker, Gitlab CI/CD, DevOps, requirements gathering. • Developed from scratch the data preparation pipeline for the Canadian real estate registry website. This enhanced the geo API performance up to 10 times and significally reduced data errors. My job included *software developer* and *data engineer* roles: designing, implementing, deploying the solution, and constructing the analytics/aggregating queries, raw geo data markup and cleaning. ➔ Skills: Python, Pandas, PostgreSQL, PostGIS, SQL, geocoding, OpenStreetMap, OSM Overpass, Amazon AWS, Gitlab CI/CD, DevOps. • Increased ML dataset annotation platform API performance by 5x by optimizing heavy database queries. ➔ Skills: Python, Django, PostgreSQL, Redis, Amazon AWS, Docker, Gitlab CI/CD, DevOps. • Cut crypto exchange aggregator page load time by 50%, optimizing MongoDB queries and scaling backend processes. ➔ Skills: Django, MongoDB, Celery, Redis, Amazon AWS, Docker, Gitlab CI/CD, DevOps. • Designed and implemented a styled maps e-commerce site, implementing custom map rendering, Stripe payments, and scalable deployment on AWS. ➔ Skills: Flask, PostgreSQL, Amazon AWS, Google Maps API, Stripe, Gitlab CI/CD, DevOps. • Made the automotive raw telemetry batch convertion pipeline prototype. ➔ Skills: Python, PostgreSQL, SQL.

Small hoster, ISP and datacenter company. Senior-level position. • Modernized customer service management system by redesigning and migrating backend to a microservices architecture. This automated business flows and significantly reduced manual workload. My job was backend development, deployment, and integration with UI team, sysadmin team and external API providers. ➔ Skills: Python, Flask, Swagger, Redis, PostgreSQL, libvirt. • Improved tech support efficiency by automating workflows in the ticketing system (RT), adding new functionality, and integrating with third-party systems. Results: higher SLA compliance, faster response times, and reduced human error in ticket processing. ➔ Skills: Perl, SQL, RT. • Developed an IoT datacenter rack access system prototype with mobile app access. My job was to design from scratch and deploy the backend, integrate it with proprietary smart-lock hardware, and deliver a working prototype for executive presentation. ➔ Skills: Python, PostgreSQL. • Maintained and optimized legacy customer service dashboards. ➔ Skills: Python, Django, Celery, RabbitMQ.

Small customs brokerage company. Hybrid sysadmin/SW developer job position, mid-level. * Designed and developed the web interface (both frontend and backend) for the company's Windows CRM, making it available in browser, which allowed to migrate the office workstations to Linux. * Designed, implemented and deployed the network power cut-off solution for the office workstations with central physical console, that increased the office security. * Designed and deployed internal voting web site. * Successfully migrated all office workstations to Linux, which reduced software license costs for ~50 seats. Other responsibilities: * Maintaining the Windows servers, network infrastructure and office Linux workstations * Supporting the office PACS system and electronic locks * Office technical support Key skills: Linux, PHP, PostgreSQL, JQuery, Arduino, system design