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Ebenezer A.EA

Ebenezer A.

Senior Backend Engineer (Node.js/JS/TS)

On-demand
Calgary, CA
3-7 years

Average response time: 1 hour

About Ebenezer

I help engineering teams build and scale backend systems that are fast, reliable, and cost-efficient. Whether you need to architect a new platform from the ground up, optimize an existing production system, or bring senior technical leadership to a growing team, I deliver outcomes that matter.
With 6+ years of hands-on experience in Node.js, TypeScript, and AWS, I have built event-driven microservices, serverless pipelines, and high-throughput data systems across fintech, blockchain, and retail domains. My work has driven 50%+ infrastructure cost reductions, 75% latency improvements, and 99.9% uptime on business-critical platforms.
What sets me apart is the combination of deep technical execution and leadership experience. I have led teams of up to 12 engineers, owned architecture decisions end to end, and worked across distributed teams spanning 4 countries. I do not just write good code — I help teams move faster, make better decisions, and build systems that scale.
I typically work on projects involving backend architecture, cloud infrastructure on AWS, API design, performance optimization, and engineering team leadership. I am available for remote engagements.
What I work with: Node.js, TypeScript, AWS (Lambda, ECS, SQS, Step Functions, API Gateway), PostgreSQL, MongoDB, DynamoDB, Redis, Docker, CI/CD, GraphQL, Serverless Framework, Claude, Cursor.
  • English

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • NFT Valuations / Block.co
    Senior Backend Engineer & Engineering Lead
    June 2023 - June 2026 (3 years)
    • Served as a senior backend engineer and engineering lead overseeing project delivery while actively building products
    • Built an event-driven address-funding subsystem using Redis TTL, reducing on-chain fees by 30% and eliminating funding collisions
    • Architected and deployed Block.co API V2, improving authentication latency by 60–75% and lowering costs by over 50%
    • Established DevOps and CI/CD pipelines for automated deployments, achieving 99.9% uptime and a 30% processing efficiency gain
    • Led architecture and optimization of nine high-throughput data pipelines across 35+ AWS services for NFT valuation systems
    • Built financial reporting pipelines combining real-time valuations, historic analytics, and tax-compliant cost-basis tracking
    • Developed onboarding workflows enabling automated integration of new NFT collections with complete historic data backfill
    • Engineered snapshot recalculations and daily/hourly snapshot systems for accurate valuation continuity across millions of tokens
    • Delivered portfolio analytics tools that improved decision-making accuracy for institutional clients
    • Reduced infrastructure costs by over 50% and improved authentication latency by up to 75%; standardized AWS serverless operations; improved data reliability through automation
    • Created API documentation and operational runbooks that improved onboarding and reduced troubleshooting time for new engineers
    • Partnered with product and analytics teams to deliver portfolio intelligence tools improving decision-making accuracy for institutional clients.
    • Designed distributed event-driven architecture processing millions of NFT market events daily across serverless and containerized AWS services
    • Led teams of up to twelve developers; mentored engineers and guided architectural decisions across cross-functional teams. and reported directly to the CEO
    • Presented architecture decisions and technical recommendations to executive stakeholders
    Amazon Web Services Redis Docker Node.js MySQL
  • Cherry Blossom Intimates
    Senior Backend Software Engineer
    E-COMMERCE
    July 2022 - June 2023 (11 months)
    Glenarden, MD, USA
    • Involved in the development of existing product and integration of additional features.
    • Use of Node.js, Firebase functions, Shopify, Brightree, etc
    • Integrations with Multiple platforms.
    • Develop and present findings to problems in existing solutions.
    Node.js Typescript Firebase Shopify Google cloud
  • Elen Financial Software
    Backend Developer
    BANKING AND INSURANCE
    December 2021 - May 2023 (1 year and 5 months)
    Cardiff, UK
    • Involved in the development of existing and new products and built microservices, gaining experience in software architecture, and DevOps
    • Integration with multiple platforms.
    • I handled the switch from our initial authentication logic to Amazon Cognito.
    • Use Node.js, Koa.js, RabbitMQ, Redis, MongoDB, Docker, Jest (unit testing and integration testing), etc
    • Utilize Agile leadership training software design methodologies and best practices.
    • Work productively with the product team to understand requirements and business specifications around the finance and driver ops products.
    • Effectively code software changes and alterations based on specific design specifications.
    • Contribute to microservices' technical design and development with low latency, high availability, performance, and scalability in mind.
    • Develop and present findings to problems in existing solutions.
    • Became the payment expert, and made changes to the payment service regarding integrating the Elen App with a payment platform. Currently, optimize codes, review them, and create a framework for solution architecture.
    • Identify, foster, and proactively help colleagues to grow professionally, taking a significant role in onboarding new team members
    AWS Cognito Node.js Stripe Docker MongoDB

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Education

  • Bachelor of Engineering
    University of Ilorin
    2017
    Bachelor of Engineering - BE, Chemical Engineering
  • High School Diploma
    Redeemer's High School
    2012
    High School Diploma

Skill set

Categories