ATS resume checker and auto-tailoring tool

What to build

A web app where job seekers upload a resume and paste a target job description to get an ATS compatibility score, flagged formatting issues (tables, columns, graphics, non-standard fonts), missing keyword suggestions pulled from the job description, and one-click tailored rewrites per application.

Job seekers on r/microsaas are frustrated that ATS filters silently reject resumes over formatting and keyword mismatches, but the space already has entrenched players like Jobscan and Teal, so this is a crowded niche rather than a greenfield one.

Demand

Active job seekers applying to many roles want fast, per-application feedback on whether their resume will clear automated screening, and demand spikes whenever layoffs or hiring slowdowns push more people into high-volume applying.

• r/microsaasDiscussion

  Reddit thread: "r/microsaas - How do you handle ATS (Applicant Tracking System) filters while job hunting? I've been working on a tool for job..." — job seekers discussing ATS rejection frustration.

• Signal scoring systemMetadata

  Signal assigned opportunity score of 0.56 with no historical match in the dataset, indicating moderate but unverified interest.

• Jobscan, Teal, Rezi, ResyMatchMarket

  Existing paid/freemium ATS resume-scoring products already serving this demand, implying job seekers have shown willingness to use (and sometimes pay for) this category.

Stack

• OpenAI API (resume/job-description parsing and rewrite generation)
• pdf-parse or Affinda API (resume text/format extraction)
• Next.js
• Supabase (auth, storage, credits/subscription tracking)
• Stripe (per-scan credits or subscription billing)
• Vercel

Solo + AI difficulty

The scoring UI, keyword-gap diffing, and rewrite generation via an LLM are straightforward for a solo builder with AI assistance and could reach MVP in 1-2 weeks; the hard part is reverse-engineering real ATS parsing behavior (tables, columns, fonts, PDF vs docx quirks) well enough that scores feel trustworthy rather than arbitrary, which requires ongoing testing against actual ATS platforms, not just LLM guesses.

Entry threshold

Low barrier: a solo builder can ship an MVP in days using resume parsing libraries and an LLM for keyword/gap analysis; main effort is UX polish and building trust in the scoring accuracy, not infrastructure.

Window

ongoing

Where to find first users

• r/microsaas
• r/jobs and r/resumes subreddits
• Product Hunt launch
• LinkedIn job-search content creators and career coach partnerships

Competitors

• Jobscan
• Teal
• Rezi
• ResyMatch

Counter-signals & risks

• Several established players (Jobscan, Teal, Rezi, ResyMatch) already offer ATS resume scoring and keyword-matching features, making differentiation and customer acquisition difficult.

• ATS vendors frequently update parsing algorithms, making it hard for a third-party tool to maintain accurate compatibility scoring over time.

• Freemium per-scan monetization may face low willingness-to-pay since job seekers are price-sensitive and use the tool only episodically during active job searches.