Available to hire
I’m Joshua Olujimi, a Backend and Blockchain Engineer with hands-on experience deploying secure, scalable microservices on AWS, Docker, and Kubernetes. I design API ecosystems, implement off-chain services, and integrate multi-chain DeFi protocols with focus on reliability and security. I thrive in event-driven architectures, CI/CD pipelines, and cross-functional collaboration with product, DevOps, and security teams. In past roles I built authentication, payments, notifications, and smart-contract systems across DeFi and financial marketplaces.
I enjoy turning complex business requirements into robust technical solutions, applying best practices in security, testing, and performance. I’ve collaborated across distributed teams and continuously learn new tools to deliver value in fast-paced environments.
Skills
Experience Level
Expert
Expert
Expert
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Expert
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Expert
Expert
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Expert
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Intermediate
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.
Backend / Block chain Engineer at Block DAG
May 25, 2025 - January 20, 2026Designed and maintained backend services and smart contract systems supporting multi-chain DeFi trade infrastructure. Built microservice-based architectures, interfacing with REST and messaging queues; integrated blockchain protocols with backend APIs and ensured secure state synchronization and transaction orchestration.
Python Instructor at Algorithmics International
May 1, 2022 - October 2, 2023Taught Python programming and algorithmic thinking; mentored students on writing clear, structured code and problem-solving approaches.
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, 2023BSc Petroleum and Gas Engineering at University of Lagos
February 1, 2017 - August 20, 2023Qualifications
Industry Experience
Software & Internet, Education, Professional Services, Media & Entertainment, Financial Services, Gaming
Skills
Experience Level
Expert
Expert
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Expert
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Expert
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Intermediate
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