Available to hire
I’m Joshua Olujimi, a backend and blockchain engineer focused on building secure, scalable microservices and DeFi infrastructure on AWS with Docker, Kubernetes, and CI/CD pipelines. I thrive in event-driven architectures and enjoy hands-on delivery, especially when integrating on-chain and off-chain systems. I’ve worked with MySQL, MongoDB, and various API patterns to deliver compliant, security-focused services and multi-chain integrations.
Skills
Language
English
Fluent
French
Intermediate
German
Intermediate
Work Experience
Blockchain Developer at DS Legends Pte. Ltd.
December 1, 2024 - PresentRemote blockchain developer focused on designing, developing, and securing core DeFi protocols and blockchain infrastructure across multi-chain environments.
Full Stack Web3 Engineer at Boothark
January 1, 2025 - May 1, 2025Contributed to the development of a robust financial solution and marketplace platform enabling seamless exchange of value across multi-service offerings.
Full Stack Backend Engineer at Dormot
September 1, 2024 - January 31, 2025Currently working in an Agile team to develop scalable microservice-based cloud applications using NestJS and TypeORM.
Mid-Level Full Stack Developer at Seek Make
May 1, 2024 - July 31, 2024Mid-Level Full Stack Angular/NestJS Developer (Part-time).
Python Instructor at Algorithmics International School of Mathematics
May 1, 2022 - October 1, 2023Laid groundwork for Python instruction, fostering growth mindset and problem-solving skills among students.
Backend / Blockchain Engineer at PeerPay Network
May 20, 2025 - PresentDesigned event-driven and RPC-style communication between off-chain services and on-chain ledgers; deployed services on AWS, containerized with Docker and orchestrated using Kubernetes; implemented CI/CD pipelines to automate testing and deployments across pilot environments.
Backend / Blockchain Engineer at Block DAG
May 20, 2025 - January 20, 2026Built and maintained backend services and smart-contract systems supporting multi-chain DeFi infrastructure; automated backend processes to support DeFi workflows.
Backend / Blockchain Engineer at DS Legends Pte. Ltd
December 20, 2024 - March 20, 2025Developed backend-integrated smart contract systems for DeFi applications; designed multi-chain architecture and infra.
Backend Engineer (Angular/NestJS) at Seek Make
May 20, 2024 - July 20, 2024Developed scalable backend services for a manufacturing SaaS platform using NestJS; supported micro frontend architecture, improved deployment speed and system modularity.
Backend / Web3 Engineer at Booth Ark
January 20, 2025 - May 20, 2025Designed and implemented scalable backend microservices for a financial market platform; built core services for authentication, profiles, payments, notifications, and referrals; implemented event-driven systems using message queues; optimized API performance and front-end/backend interaction patterns.
Backend / Angular/NestJS Engineer at Seek Make
May 1, 2024 - July 1, 2024Developed scalable backend services for a SaaS platform using Angular/NestJS; built a multi-service architecture, implemented robust APIs, and integrated databases (MySQL). Collaborated with DevOps to optimize deployments and ensure reliability.
Rust Backend / Smart Contract Engineer (Internship) at SkyTrade
April 1, 2024 - September 1, 2024Built Rust-based backend and smart contract components for a blockchain-powered air-spaces trading platform; focused on performance optimization, security reviews, and cross-component testing across backend and on-chain code.
Python Instructor at Algorithms International
May 1, 2022 - October 1, 2023Taught Python programming and algorithmic thinking, mentoring students to write clean, structured, and testable code with a focus on problem-solving and logical reasoning.
Backend Engineer / Blockchain Engineer at PeerPay Network
May 20, 2025 - PresentDeveloped API services, a custom blockchain explorer, and internal tools interfacing with a Hyperledger Fabric consortium to support credit life cycle management, recovery workflows, and audits.
Backend / Blockchain Engineer at Legends Pte. Ltd
December 1, 2024 - March 20, 2025Designed and implemented backend services and smart contracts supporting multi-chain DeFi trading workflows; built automation and tooling to streamline development and operations.
Backend / NestJS Engineer at Seek Make
May 20, 2024 - July 20, 2024Developed scalable backend services for a manufacturing SaaS platform using NestJS, implementing microservice interfaces and reliable deployment patterns.
Backend / Web3 Engineer at Boothark
January 20, 2025 - May 20, 2025Designed and implemented scalable backend microservices for a financial market platform; built core services for authentication, profiles, payments, notifications, and referrals; implemented event-driven systems using message queues; optimized API performance.
Backend / Blockchain Engineer at DAG
May 1, 2025 - January 1, 2026Designed and maintained backend services and smart contract systems supporting multi-chain DeFi infrastructure. Implemented secure, scalable microservices on AWS using Docker, Kubernetes, and CI/CD pipelines. Proficient in MySQL and MongoDB, delivering compliant APIs, with experience in message queues, caching, and blockchain integrations.
Backend / Blockchain Engineer at DS Legends Pte. Ltd
May 1, 2025 - January 1, 2026Designed and maintained backend services and smart contract systems for multi-chain DeFi infrastructure, with focus on reliable, auditable APIs and cross-chain compatibility.
Backend / Blockchain Engineer at Seek Make
May 1, 2024 - July 1, 2024Developed scalable backend services with Angular/NestJS, integrated on-chain and off-chain components, and implemented CI/CD pipelines for automated testing and deployments.
Education
BSc Petroleum and Gas Engineering at University of Lagos
January 1, 2017 - July 1, 2023Bachelor of Science in Petroleum and Gas Engineering at University of Lagos
January 20, 2017 - August 20, 2023BSc Petroleum and Gas Engineering at University of Lagos
January 1, 2017 - August 1, 2023Bachelor of Science at University of Lagos
January 1, 2017 - August 20, 2023BSc Petroleum and Gas Engineering at University of Lagos
January 1, 2017 - August 1, 2023Qualifications
Industry Experience
Software & Internet, Education, Professional Services, Media & Entertainment, Financial Services, Gaming
Skills
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