Vladyslav Hontar

Software Engineer — Java · Rust · Distributed Systems · Athlone, Ireland

Quick Bio

Vladyslav Hontar

I'm a 21-year-old software engineer based in Athlone, Ireland. Java was my first language and still the one I reach for by default; Rust came later, when I got interested in how Solana works under the hood, and it's what I now write low-latency services in. I work at Osambit as a software engineer and technical consultant — I sit with clients to work out what they actually need, design the architecture, and then stay on to build it. Before that I spent a year and a half at EQUI Labs, a three-person startup, building backends, indexers and Solana programs.

I'm studying for an M.Sc. in Software Design with AI for Cloud Computing at Technological University of the Shannon, and I like taking things apart to understand how they work underneath. I also enjoy presenting technical topics to an audience — there are slides from a few of those talks further down this page.

Email

I usally respond to all emails within 24 hours.

Contact me

Experience

Osambit — Software Engineer (Blockchain) & Technical Consultant

Client-facing architecture work alongside delivery: low-latency infrastructure for DeFi/MEV strategies, with transactions landing inside the first slot.

EQUI Labs — Solana Blockchain Developer

Backend, a real-time indexer over Solana DEX pool rates, Anchor programs, and a Java/Spring Boot observability service.

SKLO — Hardware Technician → Service Center Coordinator

Coordinated a 7-person repair team; iPhone screen refurbishment and micro-soldering.

The full version, with numbers, is in the CV. The projects below are the part a CV can't show.

Proficiency

An honest read on where I actually stand, rather than a list of logos.

Java / SpringAdvanced

My first language and the one I'm strongest in. Multi-service applications with Spring Boot, JPA/Hibernate, REST APIs, MySQL and PostgreSQL, tested with JUnit and Mockito.

RustProficient

Production low-latency services: Tokio, pinning threads to cores, cache-conscious data layout. Picked it up for Solana work and it's now my second language.

SolanaAdvanced

Validator internals, Turbine, leader schedule and transaction landing, mostly from an MEV perspective. Anchor programs, CPIs and compute-unit optimisation.

InfrastructureProficient

Linux, Docker, Git, GitLab CI, ZeroMQ, AWS SQS and Secrets Manager. Architecture and infrastructure design is the part of a project I care about most — I think it decides half of whether it succeeds.

TypeScript / JavaScriptWorking knowledge

Backend APIs and dashboards. Enough to be useful across the stack, not where my depth is.

C++Embedded level

ESP32 and Arduino devices talking to sensors and REST APIs — see the AI assistant project below.

SolidityBasic

Enough to design and ship the Robin DLMM DEX. I'm an SVM person rather than an EVM one.

Education

M.Sc., Software Design with AI for Cloud Computing NFQ Level 9, in progress

B.Sc. (Honours), Software Design with AI for Cloud Computing NFQ Level 8

B.Eng., Computer Engineering NFQ Level 7

Higher Certificate, Network Technologies & Telecommunications

Certifications

Google Cloud

Google Career Certificates

Cisco Networking Academy

Technological University of the Shannon

The complete set, including the remaining Google certificates, is on my LinkedIn profile.

Community & Competitions

Solana Breakout Hackathon

Superteam Ireland

Projects

Here are some of my projects or projects I contribute to:


PlohoyStream

Jun 2026 — active development

GitHub repo: BadStream


Turns an Android phone into a self-contained live-streaming camera — point it at a scene, pick a destination, go live to any RTMP, RTMPS or SRT ingest. Inspired by Moblin on iOS, aiming for a real broadcast tool rather than a toy.


The transport stack is written from scratch in native C/C++ instead of wrapping a black-box SDK — RTMP handshake, chunking, AMF0 and FLV, MPEG-TS muxing, and SRT through libsrt — so the entire streaming path stays under the app's control.



Kotlin and Jetpack Compose (Material 3) on top of the native core over JNI, with a landscape-first viewfinder.

PlohoyStream live viewfinder
Manual exposure panel while live

Full write-up, videos and architecture →



SolanaMap

Mar 2026

Website: Not hosted


DataVisualization uni project to visualize Solana validators on the map. Has few tools to measure latency to the validators which wont be very accurate but will give the basic understanding of routing


Map has several visualization modes to show validators versions, amount of stake, routing hops, etc.


Each hover on validator shows full info on IP, ports, ISP, stake, pubkey



Demo page



Robin DEX

Im planing to open-source this DEX in the coming weeks | 25 Feb 2026


Website: Not hosted yet

GitHub smart-contract repo: GitHub repo

GitHub front-end repo: private for now

Whole DEX is developed with Solidity (Im more SVM guy rather than EVM so thanks to Claude Code for helping out in some cases). Main goal is to make dynamic fees based on spread with Oracle price and amount of swaps within the time window (activity-based fee).

SC Architecture UML

Recent updates:



EQUI SWAP

Aggregator/Swaping tool/Wallet manager

Built with the EQUI Labs team for the Solana Breakout Hackathon (14 Apr 2025) — designed and shipped as a working product inside the competition window.


Website: Equi Swap

Pitch: Equi Swap - Pitch 2025

GitHub repo: equi-swap (front-end only)

We use our own indexer with microservice architecture. Each user is handled in a new thread with indexer as a separate service

Tech diagram

Recent updates:



Solana Arb (private use only)

GitHub repo: PRIVATE FOR A REASON

This is probably one of the biggest achievements for me as there are barely 10 projects in the world which have 100% transaction landing success rate as this project (I personally have seen only 2)

The project started its journey back on 5th May 2024 and stopped its support in Sep 2025 as needs significant architecture redesign and approaches


Program: Solscan

this program(smart contract) is a second heart of this project and is crystal clear open for anyone to observe

  • Software works by having indexer which monitors blockchain calculates prices every time it receives an update from gRPC.

  • Software has its own simulation service so there is no need to make any API calls which minimizes the delay.

  • Deployed program recalculates the given transaction to check if any changes happen during transaction landing.

  • Made in rust to maximize performance.

  • Does 12-14k transactions on average per day


  • Grafana is used to monitor overall performance of the bot (internal use only)



Show More (old updates)


AI assistant ESP32

Small (6x3cm) portable device which you can talk to while holding the pressure sensor and get a response on display

Device connects to a phone with BLE and requires a simple android app which works as a communicator between device and server, so you dont need to connect this device to a wifi or buy separate sim card



Demo page



SEEFOOD

A mobile app that uses AI to detect whether a given food item is a hotdog or not a hotdog. Originally a fun parody project, it demonstrates skills in machine learning, image classification, and mobile development.

UI mimics the original app from the HBO series Silicon Valley




Library ERP

The main idea of this project is to make a GUI and web site application which will be able to work with SQL databases, will be fully customizeble to use it for any needs.

GitHub repo: LibraryERP

I tried to make the whole application with mvc design pattern so its easy to make changes and make updates to it.

The whole functionality available at the moment is represented on the diagram bellow.

Recent updates:

Public Talks

The talks are arranged with themes and have chronological structure. The ones are on the top are the most recent ones. Here are some of my public talks:

How does v-sync, g-sync, free-sync work

Slides (Eng)

Here is a presentation that I made for my university on how does different type of sync works inside any game. Presented in 2023 in TUS for engineering students. Got a skill badge for presenting from TUS (check LinkidIn certification group).


POT from inside

Slides (Eng)

This presentation is maded with my classmates for the first year of uni. The presentation covers how does potentiometer works, common use cases etc. Presented in 2022 in TUS in class.


Data integrity

Slides (Ukr)

Note: this presentation is for entry level students. The presentation covers hash functions, checksum and few other topics. Not much to talk about, really small presentation used to present it at the end of 2021 in Kyiv College of Communication.