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allwells/README.md

Allwell Onen

Frontend & Product Engineer · AI Integrations & Automation

Building useful software.

Portfolio · Selected Work · LinkedIn · Email


About

I'm a Frontend & Product Engineer with 7+ years of experience building web applications, SaaS platforms, marketplaces and business software.

My experience spans frontend architecture, multi-tenant systems, complex application workflows and product development. I've worked as the sole frontend engineer on early-stage teams, helped launch products and maintained applications through evolving requirements and multiple product iterations.

My work also extends into AI applications, LLM integrations and workflow automation, connecting language models, APIs and business systems to build practical software solutions.

I've collaborated remotely with teams in Nigeria, Brazil, Portugal, the United States and the United Kingdom.

Engineering Focus

Frontend Engineering

  • Architecture and development of React, Next.js and TypeScript applications.
  • Multi-tenant systems, role-based experiences and organization-scoped data.
  • Complex interfaces, reusable component systems, accessibility and performance.
  • Typed API integrations, asynchronous data management and real-time functionality.

Product Engineering

  • End-to-end development of SaaS platforms, dashboards and multi-application products.
  • Translating product requirements into maintainable technical implementations.
  • Authentication, authorization, API integration and cross-application workflows.
  • Building and evolving products alongside design, backend and product teams.

AI Applications & Integrations

  • Integrating language models into web applications and existing business systems.
  • Structured data extraction, validation and human-review workflows.
  • Connecting AI capabilities with application logic, APIs and persistent data.
  • Developing full-stack AI-powered application features.

AI & Workflow Automation

  • Building n8n workflows for CRM operations, recruitment, support and finance.
  • Integrating LLMs, webhooks, third-party APIs and business platforms.
  • Event-driven automation, conditional processing and structured data synchronization.
  • Workflow reliability, failure handling, logging and human approval.

Selected Work

Project Engineering Contribution
Braudit Sole frontend engineer for a multi-tenant employee productivity SaaS platform serving 33 organizations. Owned frontend architecture and development through multiple product pivots.
Pather Frontend delivery across three education applications for learners, experts, and administrators, including course management, live sessions, quizzes, and dashboards.
SmoothBook Co-founder and frontend engineer building a multi-tenant short-let booking platform across manager, agent, and marketing applications. Currently pre-launch.
ParseHQ Independent full-stack AI invoice processing application integrating Gemini/OpenAI, structured extraction, validation, and source-linked document review. Private development.
HubSpot Lead Enrichment Developed a live n8n, Gemini, and HubSpot automation for RetailBox. Client-reported outreach readiness improved from hours or days to approximately five minutes.
AI CV Screener Developed an automated recruitment screening workflow for MugDevs using n8n, Gemini, Google Drive, and Google Sheets. Client-reported initial screening of 70+ CVs fell from approximately one week to minutes.

Explore more work and case studies →

Technical Expertise

My work covers application architecture, frontend engineering, backend integrations, AI capabilities and business automation.

Area Technologies
Frontend TypeScript, JavaScript, React, Next.js, Vue, Nuxt, Tailwind CSS
Application Architecture & Data TanStack Query, Apollo Client, GraphQL, REST APIs, WebSockets, Zustand
Backend & Databases Node.js, PostgreSQL, Drizzle ORM, Prisma, Better Auth
AI Applications Vercel AI SDK, OpenAI API, Anthropic Claude, Google Gemini, Zod
Automation & Integrations n8n, HubSpot, Gmail, Google Sheets, Airtable, Slack, QuickBooks, Webhooks
CMS Sanity, Storyblok
Development & Delivery Git, Docker, GitHub Actions, Sentry, Vercel, Bun

Professional Experience

Frontend Engineer · Serendpt AI
April 2026 – Present · Part-time, Remote

Frontend engineering for AI-powered products, including agent knowledge bases, embeddable forms, customer-facing integrations and dashboards.

AI Integration & Automation Engineer · Freelance
February 2026 – Present · Remote

Developing AI integrations and business automations connecting CRMs, recruitment processes, customer support systems and third-party APIs.

Frontend Engineer · Braudit
February 2023 – April 2026 · Full-time, Remote

Owned frontend architecture and development for a multi-tenant SaaS platform focused on employee productivity and performance management.

Web Developer · Studio Freight
June 2025 – January 2026 · Remote

Frontend development, Sanity and Storyblok implementations, and content migration for agency client projects.

Frontend Engineer · Moonshot IT
May 2019 – January 2023 · Full-time, Remote

Frontend engineering for web applications, dashboards, and software products developed with international teams.

Currently

  • Frontend Engineer at Serendpt AI (part-time).
  • Building and maintaining web applications, AI integrations, and automation workflows.
  • Open to remote full-time, part-time, contract, and freelance opportunities.

Frontend & Product Engineer

Lagos, Nigeria · Remote-first

Website · LinkedIn · Email

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