Okeke Divine-Vessel

Software Engineer

Building multi-tenant SaaS architectures, high-performance data layers, and healthcare interoperability engines.

Active Platforms

Engineering History

  1. Dec. 2025 — Present

    Software Engineer

    Shipboard.dev (Remote / Nigeria)

    • Independently designed, built, and shipped a multi-tenant SaaS platform and VS Code extension that brings user-voted feature requests directly into the development workflow, allowing developers to review, discuss, prioritize, and mark requests as shipped without leaving the editor.
    • Engineered the end-to-end feedback lifecycle, including public voting, request management, board updates, and automated email notifications triggered when features are shipped.
    • Designed and implemented the extension authentication flow using cryptographically hashed Personal Access Tokens (PATs), secure local credential storage, and a cloud API; independently managed production infrastructure across Vercel, Supabase, and Resend, with the extension published on the VS Code Marketplace and reaching 15 installs.
  2. Aug. 2024 — Dec. 2025

    HealthTech Integrations Engineer (Contract)

    Ilanatech (Remote / Germany)

    • Architected the core healthcare data platform, including the FHIR server, HL7v2 server, backend structure, and frontend (authentication, UI, navigation), enabling integration and cross-standard clinical data exchange between legacy HL7v2 and modern FHIR formats.
    • Built a FHIR server capable of managing thousands of clinical resources, from scratch in Python (Flask), with resource management, bulk imports, and a chained/include/reverse-include search engine for deep clinical relationship queries.
    • Built a real-time HL7v2 ingestion layer executing Minimum Lower Layer Protocol (MLLP) over secure raw TCP and TLS sockets on Linux cloud environments, incorporating automated ACK/NACK transactional logic.
    • Developed a cross-standard search algorithm and a Unified Data Viewer to aggregate data from configured FHIR servers and stored HL7 sources, cross-referencing universal identifiers to assemble longitudinal patient timelines.
    • Translated high-level product direction and reference examples into technical implementations, independently researching, designing the data model, building and shipping features to production.
    • Built the multi-tenant backend logic to connect unique organization IDs to Keycloak authentication flows, enforcing tenant-level isolation of medical data across organizations sharing the same FHIR server.
  3. Jul. 2024 — Dec. 2024

    Backend Systems Engineer (Contract)

    Lilysolutions Limited (Remote / Nigeria)

    • Rewrote a bloated legacy PHP codebase into a modular Node.js/Express and MongoDB architecture, reducing scope to the core endpoints required and eliminating unused template functionality, per lead-engineer-directed migration.
    • Built a nearest-driver matching feature for logistics dispatch, using MongoDB's geospatial queries to find the closest available driver to an incoming order.
    • Engineered multi-tenant customer, vendor, and logistics backend workflows alongside a distributed team, including integration of a third-party KYC and license verification service.

Technical Proficiencies

Protocols & Standards

HL7v2FHIRKeycloak IAMOAuth2REST APIs

Languages & Core Stacks

Python (Flask, Django)Node.js (Express)TypeScriptNext.jsReact

Databases & Data Modeling

PostgreSQLMongoDBMySQLPrisma ORM

Systems & Infrastructure

Multi-Tenant SaaSAuthentication & AuthorizationDockerCI/CDCloud Infrastructure