[ FREELANCE SERVICES / EXECUTION FOR HIRE ]
SERVICES
Zanvexis provides freelance engineering services for founders, startups, companies, and individuals who need custom execution in crypto systems, automation, backend security, dApps, and premium web experiences.
What I Build
Trading Bots & Execution Systems
Custom bots for crypto trading, monitoring, execution, alerting, arbitrage simulation, and strategy automation. This includes high-frequency systems, smart money tracking, market scanners, and custom workflow bots.
Backend Security & Hardening
Security-oriented backend improvements for applications and infrastructure, including API protection, risk surface reduction, safer integrations, defensive architecture, and practical hardening for production systems.
dApps & Web3 Development
Design and development of decentralized applications, smart contract integrations, Solana-focused systems, on-chain workflows, dashboards, and custom Web3 infrastructure for startups, founders, and independent builders.
Premium Websites & 3D Brand Experiences
High-end websites built with strong brand identity, premium motion, high-performance frontends, and custom presentation layers for companies, products, creators, and service businesses.
Service Directory
Trading Bot Development
Low-latency Rust execution engines, Solana arbitrage, market making, and built-in risk controls.
View serviceFull-Stack Crypto Security
Security across smart contracts, wallets, backend, frontend, and on-chain monitoring.
View serviceSmart Contract Audits
Manual review, invariant fuzzing, and exploit simulation for Solana and EVM protocols.
View serviceWallet & Treasury Security
Multi-sig and MPC signing, key management, and spending policies for crypto treasuries.
View serviceBackend Security & CI/CD Hardening
Zero-trust APIs, Rust and Go services, secrets management, and attested pipelines.
View serviceFrontend & Domain Security
Wallet drainer defense, CSP and SRI, and DNS and domain takeover prevention.
View serviceMonitoring & Incident Response
On-chain monitoring, circuit breakers, and response playbooks built before an incident.
View serviceDeFi Protocol Design
AMMs, lending pools, escrow systems, and tokenomics on Solana and EVM.
View serviceEnterprise Blockchain
Permissioned ledgers, decentralized identity, digital product passports, and traceability.
View serviceAgentic AI & Workflow Automation
Production AI agents that run authorized tools and automate real business workflows.
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Industry Platforms
Industrial Energy Telemetry Platform
BACnet/IP, Modbus, and MQTT edge acquisition with AI anomaly diagnostics.
View platformCryptographic Telemetry Validation Engine
Zero-trust validation of IoT and industrial data before AI or on-chain use.
View platformSmart Water Metering Platform
Remote readings, individual cost allocation, and real-time leak detection.
View platformCircular Economy & E-Waste Traceability
Smart bins, computer vision sorting, and blockchain chain of custody.
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Pricing
Small tasks, debugging sessions, and technical reviews can be billed hourly. Larger builds, custom bots, dApps, and premium websites may be quoted per project depending on scope, complexity, delivery speed, and risk.
Current hourly work typically starts between $15 and $30 per hour, depending on the type of work. Custom pricing, milestone-based work, and negotiated payment structures are available for selected projects.
If you are not sure which format fits your case, send the project details through the contact page and I can suggest the best approach.
Selected Work
STRATA
A Solana vault that replicates Brazilian FIDC tranche structure on-chain with immutable waterfall logic enforced by bytecode.
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SmartFlow
Automated smart money discovery for Solana with wallet scoring, performance analysis, and real-time alerts.
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Solana Flash Loan
Production-grade Solana flash loan bot for atomic arbitrage across MarginFi, Raydium, and Orca using Anchor.
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InvoiceChain
On-chain invoice system for freelancers with USDC payments confirmed on Solana.
View ProjectNeed Something Built?
If you need a custom bot, a secure backend, a dApp, a monitoring system, or a premium website with strong visual identity, send your project details and I will review the scope with you directly.