haineko.dev

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Profile

I am a software engineer with ~20 years of professional experience. Looking for middle+, senior or lead position.

Skills

Technical supervising, mentoring, team management, product management, architecture, programming, performance optimization, and DevOps.

Experience

Zipreader – 2025
A platform for actors to create audition self-tapes.
Key technologies: Typescript, Svelte 5, Python, AI
  • Researched open-source models for TTS, Speech Recognition, OCR and structural data extraction, provided detailed report
  • Built a MVP
Repunzel – 2025
A platform for aspiring actors to find agents.
Key technologies: Typescript, Svelte 5, Firebase, Supabase, Redis
  • Completed application redesign
  • Updated application architecture
  • Updated payment workflow, track purchases
  • Reduced third-party dependency count
  • Migrated to Svelte 5, improved performance, dev experience and code quality
  • Migrated to Supabase, which allowed to implement OLAP and improve performance and data structure
  • Added vector search to match agents with actors using NLP
  • LLM-powered data search and processing to build the database of agents
Auditional – 2024
A platform for tracking auditions for actors.
Key technologies: Rust, AI, Typescript
  • Optimized structured information retrieval using RAG, achieved more stable generation and better precision.
  • Optimized web API, achieved better throughput and reduced latency.
  • Improved Chrome extension performance and modernize stack
Wellfoundfoods – 2024
Optimized performance of the Wellfoundfoods vending machines platform, reducing overall response times across the app.
Key technologies: Python, Django, Web Components, Typescript, Celery, Pandas
  • Optimized external data synchronization, reducing latency and bandwidth.
  • Implemented new type of reporting, improving client satisfaction.
  • Refactored Postgres data model to streamline storage.
Arro – 2024
Implemented custom grid searching solution, deployed to AWS SageMaker, utilized Ray to distribute computation.
Key technologies: Python, SciPy, Pandas, Polars, TensorFlow, Ray, AWS
  • Implemented custom grid searching solution, deployed to AWS SageMaker, utilized Ray to distribute computation.
Demandify – 2024
Implemented distributed system to create supply/demand models for clients.
Key technologies: Python, Pandas, Polars, Typescript, Svelte 5, RabbitMQ
  • Created deployment pipeline
Repunzel – 2024
A platform for aspiring actors to find agents.
Key technologies: Typescript, Svelte 4, Firebase
  • Optimized deployment process by removing extra Express.js server and migrating from CloudFlare to DigitalOcean.
  • Optimized application performance, reducing latency and time to render.
  • Refactored application, removed outdated code, updated dependencies, fixed security issues.
  • Implemented new features: multiple submissions, multiple purchase options.
Friisbi (Coala visionario) – 2021 - 2023
Designed microservice-based platform architecture.
Key technologies: Go, Typescript, Rust, React, Kafka, GraphQL, NoSQL, PostgreSQL, Temporal
  • Implemented backend microservices for user, project, data source management, data fetching, data processing, GraphQL API for the frontend.
  • Implemented PostgreSQL extension (foreign data wrapper) to sync remote data.
  • Built custom in-house set of libraries for Go
  • Built React components for rich data presentation (pivot tables, kanban)
  • Designed and implemented Temporal-based workflows
Coala visionario – 2023
Research and development of custom LLM to be used in Odoo as a remote service for natural language report generation.
Key technologies: Go, Typescript, Python
  • Research and development of custom LLM to be used in Odoo as a remote service for natural language report generation.
Autocruitment – 2021
Refactored and rebuilt database architecture, yielding a speed-up in all API requests by up to 10x.
Key technologies: Python, Django, Vue 2, Go
  • Extracted some performance-critical sections into Go microservice, which helped reduce latency and improved end-user experience
  • Built new features, like complex reporting and statistics analysis
  • Rebuilt UI from scratch in Vue, which enhanced user experience and retention
makeomatic – 2013-2018
Outsource software development for various clients.
self-employed – 2010-2013
Various freelance jobs primarily PHP, Python and jQuery.
Junior software engineer, city council – 2009-2010
Minor functions development for internal CRM, supervising digital certificates issuance and distribution for municipal subsidiaries.