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Case study 04

Reslo

Reslo puts a whole job search in one place. You keep reusable career profiles as the single source of your experience, then generate a resume from one in a click, or start from a template or an imported PDF. A drag-and-drop builder with a live preview and an AI writing copilot help you sharpen each bullet, an ATS checker scores the result against a job description, and matching cover letters are drafted from the resume and the job post. Finished resumes export to PDF or go out as private share links and portfolio pages, and a Kanban job tracker follows every application.

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At a glance

Status: In Progress

Role
Founder & sole engineer
Type
Own product
Domain
SaaS, AI
Focus
Resume Builder, Career Profiles, ATS Optimization, Job Tracking, AI Writing
Stack
  • Next.js
  • TypeScript
  • Better Auth
  • Drizzle
  • Neon Postgres
  • OpenAI
  • Anthropic
  • Polar
  • Resend
  • Tailwind CSS
Architecture: Profile to applicationBuilder to Server (edit); Server to Postgres (profiles); Server to AI models (copilot · ATS); Server to File storage (PDFs); Polar to Server (webhooks); Share links to Server (view)editprofilescopilot · ATSPDFswebhooksviewUIBuilderNext.jsSVCServerBetter Auth · APIDBPostgresNeon · DrizzleEXTAI modelsOpenAI · AnthropicUIShare linksportfolio · PDFEXTPolarbillingDBFile storageS3 · documents
Fig. 04 Reslo architecture: Profile to applicationSolid: request · dashed: async · dashed box: external

What Reslo does

  • Reusable career profiles, with presets for developers, designers, academics, students and general use
  • One-click resume generation from a career profile
  • Drag-and-drop builder with 16 section types and a live preview
  • ATS-ready templates with customizable colors, fonts and spacing
  • AI writing copilot that improves bullets and adds metrics, grounded in your real experience
  • Cover letters drafted from a resume and a job post
  • ATS checker with a readability score and missing keywords for a job description
  • PDF import that parses an existing resume into editable sections
  • Watermark-free PDF export
  • Share links and hosted portfolio pages, with passwords, expiry and view counts
  • Kanban job tracker with list view, archive and an activity log per application
  • Document storage for transcripts, portfolios and references, attached to profiles
  • Free, Basic and Pro plans with monthly AI credits

The problem

A job search scatters the same facts across a dozen resumes, cover letters, portfolio links and a spreadsheet of applications. Every new role means editing copies, and they drift apart.

Approach

Career profiles hold your experience once. Resumes and cover letters are generated from a profile and tailored per job with AI that only works from what's in the profile, so nothing is invented. The same workspace exports, shares and tracks every application.

Key decisions

  1. D1

    Profile as the source of truth

    Resumes are views of a career profile, so updating your experience once updates every resume built from it.

  2. D2

    AI grounded in your data

    The copilot rewrites and tightens what you've written; it doesn't invent experience you don't have.

  3. D3

    Catalog in the database

    Plans and prices live in Reslo's own database and are pushed to Polar from the admin, instead of being set up by hand in the billing dashboard.

My contributions

  • Came up with the product and built it alone
  • Built the drag-and-drop resume builder with live preview and PDF export
  • Built the AI copilot, cover letter drafting and ATS checker on OpenAI and Anthropic models
  • Built PDF import, share links and portfolio pages, and the Kanban job tracker
  • Set up auth with Better Auth, Drizzle on Neon Postgres, Resend emails and Polar billing driven by a catalog in the database

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