Open to opportunities

Markanthony Ogbuify

@ogbuifymark

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Blockchain engineer specializing in secure Ethereum and EVM smart contracts, MPC wallets, and scalable Web3 backends.

Nigeria

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What I'm looking for

I’m looking for roles where I can build secure, reliable Ethereum/EVM and MPC infrastructure, own production reliability, and partner with security-minded teams to ship scalable Web3 systems.

I’m a Blockchain Engineer with 8+ years of professional software development and 7+ years building production Ethereum and EVM systems. I focus on security, reliability, and scalable infrastructure—especially where smart contracts and custody-grade backends must stay dependable under real load.

At Xend Finance, I engineered robust multi-signature wallet infrastructure with Solidity and Hardhat, enabling secure transactions while maintaining 99.99% transaction integrity across 12 months of continuous deployment. I designed and implemented a Fireblocks-style MPC wallet platform with distributed key generation and signing, coordinating key shares and signing workflows across multiple parties.

I also built the orchestration and wallet-lifecycle layer using NestJS, with a strong emphasis on security, fault tolerance, and horizontal scalability for institutional-grade custody. I managed external smart contract security audits—coordinating reviews, triaging findings, and implementing remediations prior to deployment—so deployments could move forward with confidence.

Beyond Web3 engineering, I’ve delivered production-grade reliability and observability as a Site Reliability Engineer (Consultant). I integrated high-volume payment APIs, migrated legacy gateway architecture into dependency-injection patterns, and built monitoring with Prometheus and Grafana, improving observability and reducing incident resolution time by over 40%.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer (Blockchain)

Current

Xend Finance

Feb 2021 - Present (5 years 5 months)

Engineered multi-signature wallet infrastructure and an MPC-based custody platform for Xend Finance, supporting secure transactions and institutional-grade custody. Coordinated smart contract security audits and built automated on-chain balance reconciliation and savings/stablecoin contract functionality.

Solidity Hardhat MPC Rust Distributed Key Generation Solana NestJS Smart Contract Audits Stablecoins Web3 On Chain Reconciliation

Site Reliability Engineer (Consultant)

iBridge

Jun 2023 - Oct 2024 (1 year 4 months)

Integrated Zen Payment and Finige into Mobilum’s high-volume payment gateway at iBridge, enabling processing across multiple international providers. Built monitoring with Prometheus and Grafana and automated settlement and transaction reconciliation reporting stored in AWS S3.

Zen Payment API Finige API Payment Gateways Dependency Injection Prometheus Grafana Monitoring High Volume Transaction Reconciliation AWS S3

Senior Software Engineer (Consultant)

Stanbic IBTC

Sep 2020 - Jun 2021 (9 months)

Built core modules for Stanbic IBTC’s Quick-Service App, including account upgrade, corporate account opening, loan initiation, and debit card request workflows. Implemented secure, high-throughput API integrations with the bank’s core system to improve transaction-processing speed and reduce API timeouts during peak usage.

API Integration Workflow Automation Performance Optimization Reliability Timeout Reduction

Software Engineer

Binary Hill Co

Aug 2018 - Nov 2020 (2 years 3 months)

Co-led the design and development of a ride-hailing platform at Binary Hill Co, supporting real-time driver–rider matching across multiple cities. Implemented a Socket.io-based matching system and CI/CD pipelines with Docker and GitHub Actions to reduce deployment time.

Socket.IO Redis Real Time Systems CI CD Docker GitHub Actions

Senior Software Engineer

Ugarsoft Ltd

Aug 2016 - Aug 2018 (2 years)

Designed, developed, and deployed a full-stack university ERP system at Ugarsoft Ltd covering admissions, fee payments, course registration, results, and student records. Delivered a hospital management system and built RESTful APIs integrating third-party payment gateways for institutional services.

ERP Development Hospital Management Systems RESTful APIs Payment Integration Full Stack