Konstantin Slivnoi
Konstantin Slivnoi

Backend Software Engineer

Actively looking · Member since 1 Jul 2026
Message
Location
Kyrgyzstan
Desired salary
from 30 USD/hourly
Work preference
Full Time, Contract
Experience level
Not set

About

Professional summary

I am a backend software engineer with 5 years of experience building and shipping production systems across SaaS products on AWS. My work has focused on third-party integrations, large-scale automated data collection, and data-cleaning pipelines, from scrapers and ingestion to data-quality workflows.

I have led backend development for distributed systems and microservice architectures, including high-volume async workloads and real-time integrations. I enjoy solving performance bottlenecks, improving reliability, and designing systems that scale cleanly as product demands grow.

In my recent roles, I worked on health-inspection SaaS, AI training and coaching platforms, and energy cost-optimization software. I contributed to backend re-architecture, latency reduction, enterprise authentication, database hardening, and cloud infrastructure improvements across AWS-based environments.

A major part of my experience is automation and data engineering. I have built and maintained large scraper fleets, ingestion pipelines, matching and deduplication systems, geocoding and normalization workflows, and integrations with external services and client webhooks.

I am comfortable working across Python, SQL, and Go, and I regularly use Django, FastAPI, gRPC/Protobuf, Celery, Kafka, PostgreSQL, Redis, DynamoDB, Docker, and CI/CD tooling. I also have hands-on experience with Selenium, Playwright, ETL, and AWS services such as Elastic Beanstalk, Aurora RDS, Redis, and EC2.

I value clean architecture, measurable performance gains, and practical engineering decisions that reduce cost and improve uptime. I also enjoy mentoring teammates, reviewing code, and setting technical standards that help teams move faster with confidence.

Skills

13 capabilities

Experience

Career history

Software Engineer (Lead Backend) Health Inspection Monitor

Re-architected a Django health-inspection backend around clearer domain models, reducing heavy database query time by 1–2 seconds. Ran ingestion for 500+ regional scrapers using Python/Selenium and Celery with canaries and retries. Built data-quality pipelines for matching, deduplication, geocoding, and normalization, improving accuracy to 85–95% and reducing LLM spend by 65%. Owned AWS delivery with Elastic Beanstalk, Aurora RDS, Redis, EC2, CI/CD, and Sentry, cutting monthly infrastructure cost by 25–30%.

Software Engineer KI Company

Re-architected an OpenAI-powered real-time integration on WebRTC and WebSockets, reducing response latency from 5–7 seconds to under 2 seconds. Built gRPC/Protobuf transport for LLM evaluation across services, handling 4x more data at 30% faster execution. Led enterprise authentication on Entra ID with SSO, OIDC/SAML, MFA, and RBAC. Hardened database models and Alembic migrations, improving deployment speed, reducing DB errors, and increasing uptime toward 99.99%. Refactored a legacy Django/REST/gRPC async backend to remove cross-service blockers and reduce timeout issues.

Software Engineer Enshift AG

Architected a cost-optimization platform evaluating 10K+ building scenarios and saving clients $500K+ in modeled long-term expenses. Introduced Kafka to distribute async third-party results to internal workers and client webhooks, improving operations 3x. Designed a modular AWS backend, offloading authentication to Okta with SSO and MFA and integrating third-party services to speed responses by 40%. Reduced database size by 30% by moving non-critical data to external storage services.

Software Engineer 4 Screen Media

Led backend development for a distributed system of 15+ microservices across 20+ AWS services, replacing a monolithic single-server architecture. Built a core Python service for real-time, high-volume async workloads with 70–80% test coverage and 99.9% uptime. Scaled the system to 50K+ concurrent requests through event-driven async pipelines, database tuning, query optimization, and profiling. Built an automation platform integrating 100+ sites via custom Python scrapers with authentication and CAPTCHA handling, reducing manual work by 95%. Mentored a junior engineer and established architecture standards for the codebase.

Education

Learning history

University of Central Asia

B.Sc. in Computer Science

Bachelor's degree in Computer Science. Bishkek, Kyrgyzstan.

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