Timur

Timur Lukmanov
Senior Full Stack Developer | Node, Go, TypeScript, React
Zagreb, Croatia | [відкрити контакти](див. вище в блоці «контактна інформація») | [відкрити контакти](див. вище в блоці «контактна інформація») | LinkedIn | t.me/Mr_T111

SUMMARY
Full-Stack Engineer with 10+ years of experience building and modernizing B2B, B2C, and SaaS platforms across food
retail, health insurance, IoT, gaming, media, hospitality, and e-commerce. Delivers end-to-end solutions from discovery
and system design to production rollout, monitoring, and support. Translates complex business workflows into reliable
services, user-facing tools, and scalable product capabilities. Experienced in direct client collaboration, cross-functional
delivery, legacy transformation, and improving performance, stability, and operational efficiency.

PERSONAL INTERESTS & DOMAIN RESEARCH
• Web3 Ecosystems & Tokenomics: Hands-on market research, token issuance, and liquidity/distribution mechanics
across primary sale models (ICO, IEO, IDO, IFO, IGO).
• Attention Economics & Web3 Growth: Exploring retail user behavior patterns, viral growth loops, and engagement
strategies in fast-moving crypto markets.
• Product & Game Monetization: Studying behavioral dynamics, unit economics, game psychology, and real-world
asset (RWA) tokenization.

TECH SKILLS
• Frontend: React, Mapbox GL, Leaflet, AJAX, Fetch API, SVG, Canvas
• Go: Go, TCP, WebSocket, Device Communication, Low-Latency Services
• Node.js: Node.js, TypeScript, NestJS, Express.js, REST, GraphQL Federation, gRPC
• Architecture: Microservices, Event-Driven Architecture, Distributed Systems, High-Load Systems
• Messaging: Apache Kafka, RabbitMQ, BullMQ, MQTT, Webhooks, Dead Letter Queues
• Databases: PostgreSQL, PostGIS, MySQL, MongoDB, Amazon Redshift
• Data: Redis, Elasticsearch, ETL, Data Warehousing, Caching, Query Optimization
• AWS: Lambda, API Gateway, ECS, EKS, EC2, RDS, DynamoDB, S3, SQS, SNS, CloudFront, CloudWatch, IAM
• DevOps: Kubernetes, Terraform, Docker, CI/CD, Canary, Blue-Green, Rolling Deployments
• Testing: Jest, Mocha, Unit Testing, Integration Testing, Contract Testing, Load Testing
• Security: HIPAA, RBAC, ABAC, JWT, OAuth, Idempotency, Circuit Breaker, Retry

EXPERIENCE
Senior Full Stack Engineer | BeomyTech (Food Retail & Self-Service Platform) Sep 2023 – Present
Modernized a B2B/B2C platform for food retail, self-service terminals, and automated car washes. Owned hardware
integration, billing, analytics, and monolith decomposition across thousands of sites. Supported 24/7 operations with
payment response times below 500 ms in an Israel-Ukraine team.
• Extracted hardware, billing, and statistics domains into independently deployable microservices.
• Separated NestJS business logic from Go and Node.js services maintaining TCP and WebSocket links.
• Reverse-engineered legacy rules with the former architect and documented APIs in Swagger and Confluence.
• Built emulation and command layers for POS systems, payment terminals, and MDB/ccTalk devices.
• Implemented RabbitMQ flows for sales, inventory, fiscal receipts, notifications, and offline events.
• Added offline buffering and idempotency to prevent duplicate payments after connectivity recovery.
• Built ETL pipelines from PostgreSQL and MongoDB to Redshift, cutting database load by 70%.
• Reduced financial reporting from minutes to seconds and accelerated customer analytics dashboards.
• Introduced contract testing, isolated device drivers, code reviews, epic decomposition, and mentoring.
Senior Backend Engineer | Inoxoft (Health Insurance Platform) May 2022 – Aug 2023
Migrated a US and Israeli medical insurance platform from a legacy monolith to microservices. Delivered Claims and
Validation services while preparing the platform for HIPAA certification. Worked across US, Israeli, and Ukrainian teams in
two-week Scrum sprints and production on-call rotations.
• Extracted Claims Validation logic into isolated Node.js and TypeScript microservices.
• Applied the Strangler Fig pattern and feature flags for gradual 1%, 5%, 50%, and 100% rollouts.
• Used GraphQL Federation as the API gateway and Kafka contracts for asynchronous service events.
• Built secure mock environments because developers had no access to real patient data under NDA.
• Integrated EHR, EMR, insurer, and internal Israeli systems with standardized GraphQL error handling.
• Enforced RBAC and ABAC, encryption in transit and at rest, and complete audit trails for HIPAA.
• Prevented cascading failures with automatic rollback to monolith logic without server restarts.
• Added Jest unit and integration tests, high coverage, on-call support, and post-mortem analysis.

• Enabled zero-disruption migration and supported successful HIPAA certification of the platform.
Senior Backend Engineer / Team Lead | Canadian company Jun 2021 – Apr 2022
Led end-to-end delivery of a smart farming platform for livestock tracking and incident response. Designed backend, IoT
ingestion, geofencing, alerts, analytics, and React mapping components. Scaled real-time monitoring to 50,000+ devices
and thousands of telemetry events per second.
• Designed an event-driven Node.js, Express, and TypeScript microservice architecture.
• Built ingestion, geofencing, and notification services for LoRaWAN, MQTT, TCP, and UDP telemetry.
• Used RabbitMQ exchanges, acknowledgements, and dead-letter queues to prevent telemetry loss.
• Modeled animals, users, coordinates, and pasture polygons in PostgreSQL with PostGIS. Added GIST indexes for
real-time point-in-polygon checks across large coordinate streams.
• Developed React maps, marker clustering, device controls, heatmaps, activity charts, and zone drawing. Filtered GPS
jitter with smoothing and hysteresis, reducing false geofence alerts by 98%.
• Automated Docker deployments to AWS through CI/CD and used canary releases and IoT simulators.
• Cut incident response from hours to under two minutes and supported an international SaaS launch.
Senior Backend Engineer | Canadian company (Gaming & Affiliate Platform) Dec 2020 – May 2021
Scaled a B2B gaming and affiliate platform for operators, partners, advertisers, and payment providers. Owned financial
transactions, real-time analytics, referral tracking, and high-load integrations. Maintained 99.9% availability while
modernizing monolithic workloads into secure microservices.
• Built financial and analytics microservices for real-time logs, GGR metrics, balances, and payouts.
• Designed REST APIs for referral links, conversion tracking, CPA, and Revenue Share reporting.
• Isolated public event ingestion from internal payout, bonus, and balance calculation services.
• Added PostgreSQL transactions, row-level locking, partitioning, and composite indexes. Reduced report generation by
tens of times across tables containing millions of records.
• Added idempotency keys, retries with exponential backoff, and circuit breakers for partner APIs.
• Introduced connection pooling and batch upserts, reducing PostgreSQL CPU utilization by 60%.
• Added tested CI/CD gates, two-reviewer approvals, ELK logging, Prometheus, and Grafana monitoring.
• Enabled zero-downtime releases and stable processing of hundreds of thousands of peak webhooks.
Full-Stack / Backend Engineer | Zazmic (Influencer Content PaaS) Sep 2019 – Dec 2020
Automated a B2B2C platform for influencer websites, media hubs, mobile apps, and monetization. Owned multi-tenant
site generation, headless CMS APIs, social sync, streaming, and serverless workflows. Worked with a distributed US-
Ukraine product team across web, iOS, Android, QA, and design.
• Built one-click media synchronization through Facebook Graph and Google and YouTube APIs.
• Automated multi-tenant site provisioning with WordPress Multisite and WP-CLI.
• Connected native apps to live-stream and merchandise updates through Mux and Agora integrations.
• Split Node.js APIs, PHP content services, AWS Lambda jobs, and Redis-backed BullMQ queues.
• Added concurrency controls and exponential backoff to handle bulk imports and API rate limits.
• Secured OAuth token encryption and rotation for hundreds of creator accounts.
• Generated Swagger and OpenAPI documentation with versioned endpoints and standardized errors.
• Reduced Lambda cold starts and moved live status delivery to WebSockets with Redis caching.
• Cut site deployment to one click and supported onboarding of dozens of top creators.
Middle Full-Stack Engineer | Newspaper Website (High-Traffic News Portal) Feb 2019 – Aug 2019
Modernized a 24/7 news platform serving a multimillion-reader audience during breaking events. Owned backend
performance, full-text search, caching, media processing, and publishing reliability. Stabilized traffic peaks of 10,000+
requests per second and improved organic traffic by 40%.
• Integrated Elasticsearch search with morphology and typo correction, keeping responses below 30 ms.
• Designed Varnish and Redis caching that isolated PHP and MySQL from public reader traffic.
• Split content read and editorial write flows while synchronizing search indexes and cache invalidation.
• Optimized MySQL indexes for articles, categories, authors, and many-to-many relationships.
• Moved heavy image and video files to external storage and added asynchronous media conversion.
• Prevented cache stampedes with Redis locks and stale content delivery during regeneration. Improved TTFB and
Core Web Vitals, strengthening visibility in Google News.
Full-Stack Engineer | Local Market (Hotel Booking System) Feb 2018 – Jan 2019
Built a property management and booking system for hotel staff, reservation teams, and guests. Owned Booking.com
synchronization, room inventory, pricing, transactions, queues, and booking UX. Delivered real-time availability updates
while eliminating overbooking and manual data entry.
• Built PHP services for Booking API integration, webhook validation, and asynchronous processing.
• Modeled rooms, room types, rates, availability, guests, and bookings in MySQL.

• Added Redis holds and ACID row locking to protect inventory during concurrent reservations.
• Implemented bidirectional synchronization of rates, availability, bookings, and cancellations.
• Returned immediate webhook acknowledgements and processed XML and JSON updates through queues. Batched
seasonal bulk updates in Redis, eliminating MySQL deadlocks during traffic spikes.
• Developed JavaScript date selection, live availability, options, validation, and checkout flows.
• Tested integrations in the Booking.com sandbox and launched through a limited room quota.
• Reduced overbooking and synchronization errors to 0% with subsecond administration updates.

EDUCATION
Specialist, Finance and Banking – Khmelnitsky National University

LANGUAGES
English - B2 | Ukrainian - Native