Artyom Shabalinsky

Senior .NET / Web3 Backend Developer

Project: A high-frequency R&D trading system for pump.fun Solana meme coins, combining real-time market data processing, risk-aware buy/sell decision logic, durable execution pipelines, and Jupiter Ultra API integration. Execution & Runtime Integration: Designed and integrated the execution layer surrounding the core trading engine. Implemented Solana/Jupiter trading integrations using Jupiter Ultra API and Solnet-based infrastructure. Supported both real execution and paper-trading flows, handling order quoting, transaction signatures, fees, slippage calibration, and route telemetry. Durable SELL Pipeline: Built and maintained a resilient SELL outbox execution flow utilizing SQL Server persistence, idempotent order records, ownership/versioning control, and state transition telemetry to guarantee recovery after failures. Background Workers & Lifecycle Reliability: Developed a suite of specialized background processing services ensuring lifecycle stability and stale-position protection, including WatchDogService, TradeWorker, ShutdownManager, SellStateRepairWorker, SellAnalysisScheduler, and AtaRentCleanupService. Strategy & Risk Engineering: Designed and iteratively refined mathematical and structural buy/sell logic tailored for highly volatile, toxic-liquidity meme-coin markets. Implemented data-driven signal filters utilizing price change windows, net flow, volume pressure, liquidity shifts, and market cap to reduce toxic entries and mitigate rug-risk exposure. Testing & Regression Safety: Established comprehensive NUnit regression testing coverage for background workers, outbox schema parity, execution-state invariants, and strategy matrix verification to eliminate regression bugs on the hot path. Operational Adaptability: Integrated Telegram communication infrastructure for operational logging and remote alerting, subsequently deprecating the module as the architecture transitioned toward automated automated workers and native observability.

• Designed and integrated execution layer for high-frequency trading system
• Built resilient SELL outbox execution flow with SQL Server persistence and idempotent order records
• Developed suite of background processing services for lifecycle stability
• Implemented data-driven signal filters to reduce toxic entries and mitigate rug-risk exposure
• Established comprehensive NUnit regression testing coverage

Senior .NET Backend Developer

Project: A high-throughput pre-launch Web3 platform (similar to pump.fun) allowing users to deploy meme tokens on Solana, handle crypto stakes, and play blockchain-driven games. Architecture & API: Co-architected the core backend layers using a strictly decoupled layered architecture (API, Domain, Blockchain Providers, and Infrastructure Adapters); engineered REST APIs for high-frequency token operations, transactions, and real-time gaming streams. Web3 Integration: Developed the Solana blockchain integration layer using Solnet SDK. Implemented automated slot/block polling, memo parsing, and sender/receiver validation loops for secure transaction tracking. Game Mechanics & Fraud Prevention: Designed and coded backend state machines for a decentralized roulette game where outcomes were derived from future Solana blocks, ensuring provable fairness and eliminating backend manipulation. Built a pooled-stake lottery engine handling proportional winning probabilities, dynamic commission fee models, and real-time state broadcasts via Ably. Resilience & Background Jobs: Developed Azure Functions and Hangfire infrastructure for automated bet validation, payment verification retries, and crash-recovery pipelines capable of safely resolving interrupted game rounds. Security: Implemented secure wallet-based authentication using cryptographic nonce/signature verification and JWT token lifecycles.

• Co-architected core backend layers with strictly decoupled architecture
• Developed Solana blockchain integration layer using Solnet SDK
• Designed backend state machines for decentralized roulette game with provable fairness
• Built pooled-stake lottery engine with proportional winning probabilities
• Implemented secure wallet-based authentication with nonce/signature verification

Senior .NET Backend Developer

Autonomous Delivery: Handled full-cycle module engineering as an autonomous backend developer, taking ownership from database modeling and system design to API exposure and production-ready deployments. AI & Support Engines: Engineered an internal Customer Support engine utilizing OpenAI Assistants and Fine-tuning APIs. Automated thread orchestration, vector store synchronization, chat lifecycle data persistence, and custom token-usage/rate-limiting guardrails. Mass Telegram Automation: Developed a custom multi-account automated Telegram gateway managing 130+ concurrent AI-driven assistant profiles via WTelegram API, featuring parallel session tracking, intelligent message routing, and cost-control rate limits. Ad Monetization Engine: Built a comprehensive ad management module from scratch featuring custom micro-budgets, automated pool replenishment schedules, granular click auditing, and transactional rollbacks integrated with the main financial ledger. Web3 Payments: Implemented payment gateways for TON and JETTON ecosystems, supporting automated USDT/USDM contract scanning, secure balance verification, and optimized gas/fee calculations.

• Engineered internal Customer Support engine using OpenAI Assistants and Fine-tuning APIs
• Developed custom multi-account Telegram gateway managing 130+ concurrent AI-driven assistant profiles
• Built comprehensive ad management module with micro-budgets and transactional rollbacks
• Implemented payment gateways for TON and JETTON ecosystems

Senior .NET Full-Stack Developer

SaaS Booking Widget: Extended and scaled an embeddable multi-tenant B2B booking widget for real-time resource scheduling. Owned releases, production hotfixes, and direct technical requirements refinement within a compact 3-engineer agile team. Knowledge Base Platform: Designed backend storage layers and data processing jobs for a heavy cloud-native disaster prevention platform aggregating geological and vendor logs across large teams. Price Tool Matrix: Functioned as the sole developer for a high-density pricing comparison dashboard used by merchant wholesalers to aggregate records across diverse data endpoints.

• Extended and scaled multi-tenant B2B booking widget
• Designed backend storage layers for cloud-native disaster prevention platform
• Sole developer for high-density pricing comparison dashboard

.NET / Backend Developer

Altoros Development (ChatBot API): Implemented automated scheduling integrations and notification architectures for healthcare providers [.NET Core, Azure App Services]. CactusSoft (Corporate Mobile App Backend): Built highly concurrent backend features for processing corporate employee operations, utilizing Redis caches and RabbitMQ messaging channels. Itransition (Clinical Trial Intelligence Suite): Optimized large-scale medical data indexing and search filters via Elasticsearch pipelines; built streaming ingestion adapters across AWS Kinesis and Lambda layers. Svap System / KB Radar / Mobile Control: Delivered scalable web and desktop infrastructure across public sector services, utility systems, and Windows Forms software.

• Implemented automated scheduling integrations for healthcare providers
• Built highly concurrent backend features with Redis and RabbitMQ
• Optimized medical data indexing and search filters via Elasticsearch
• Delivered scalable web and desktop infrastructure for public sector services