Semi Senior Fullstack Developer (AI)

FULL_TIME

Remote | Semi Senior | Full time | Machine Learning & AI

44 applications Last checked today

LeadsEngine (https://leadsengine.app) is a profitable B2B SaaS that helps Medical supply resellers create, launch, and scale Facebook ad campaigns through a guided 7-step wizard. Customers pay $1,597–$2,497 for access. The product is live, the codebase is solid, and we ship every week.

We are hiring our first engineering teammate. Currently the founder pair-codes with Claude Code, end-to-end. The new hire joins that workflow — not assists it from the side.

We use a subagent-orchestrated workflow modeled on patterns from the Claude Code team at Anthropic. A writing subagent implements features. A separate reviewer subagent reviews the diff. CI runs lint, typecheck, tests, and build before any merge. Humans curate, orchestrate, and judge — we do not type every line by hand. If that workflow sounds exciting, this role is for you.

Our stack: Next.js 14 (App Router), TypeScript, React, Tailwind, Prisma, PostgreSQL, Supabase Auth, Stripe, Meta Marketing API, Vercel.

Apply without intermediaries through Get on Board.

What you'll do

Own features from spec to shipped, working directly with the founder using a subagent-orchestrated workflow.

Roadmap (next 6 months):

• New features across the wizard, dashboard, and admin tools
• Invoice generation, auto-responder, and scheduling integrations
• Location pinning (multi-region campaign targeting)
• Meta ad scaling automation (auto-pause/scale on performance signals)
• Facebook profile scanner (lead qualification at scale)
• Reliability and observability improvements
• New features across the wizard, dashboard, and admin tools
• Invoice generation, auto-responder, and scheduling integrations
• Location pinning (multi-region campaign targeting)
• Meta ad scaling automation (auto-pause/scale on performance signals)
• Facebook profile scanner (lead qualification at scale)
• Reliability and observability improvements

How every feature ships:

1. We agree on the spec — small batches, clear acceptance criteria
2. You drive a writing subagent (Claude Code) to implement + write tests
3. Lint, typecheck, and tests pass locally before push
4. You invoke the reviewer subagent via /review on your own diff — address findings
5. PR with a description that explains why, not just what
6. CI must be green to merge
7. Founder reviews the PR description and spot-checks behavior + security touch-points
8. You merge. Feature reaches customers within days.
9. You drive a writing subagent (Claude Code) to implement + write tests
10. Lint, typecheck, and tests pass locally before push
11. You invoke the reviewer subagent via /review on your own diff — address findings
12. PR with a description that explains why, not just what
13. CI must be green to merge
14. Founder reviews the PR description and spot-checks behavior + security touch-points
15. You merge. Feature reaches customers within days.

You're responsible for orchestrating writing + reviewer agents, judging when the AI is wrong, writing tests that prove behavior, and PR descriptions that survive without you in the room.

What you'll learn:

• AI-first development that ships 3–5x faster than traditional teams
• Production patterns: Stripe webhooks, Supabase Auth, Meta Marketing API
• How to run a small SaaS — direct exposure to product, customers, decisions
• AI-first development that ships 3–5x faster than traditional teams
• Production patterns: Stripe webhooks, Supabase Auth, Meta Marketing API
• How to run a small SaaS — direct exposure to product, customers, decisions

If you've been coding 1–3 years and want to level up fast, this is the right room.

Who we're looking for

A productive, curious, AI-fluent developer who wants to grow with us — not someone who's already done it all.

Core requirements:

• 1–3 years building full-stack apps with TypeScript, React, Next.js (App Router), and a SQL database
• Production experience with Prisma + PostgreSQL — schemas you've designed, migrations you've run
• Daily user of Claude Code, Cursor, or equivalent for at least 6 months. We'll ask how you work.
• Public GitHub or portfolio with recent commits we can read
• Working English — daily async writing + 1–2 live calls per week
• Located in Latin America (Argentina, Colombia, Mexico, Uruguay ideal)
• Treats security, accessibility, and observability as first-class concerns
• Curious and coachable — we're a small team building together. You share your thinking, ask good questions, take feedback well.
• 1–3 years building full-stack apps with TypeScript, React, Next.js (App Router), and a SQL database
• Production experience with Prisma + PostgreSQL — schemas you've designed, migrations you've run
• Daily user of Claude Code, Cursor, or equivalent for at least 6 months. We'll ask how you work.
• Public GitHub or portfolio with recent commits we can read
• Working English — daily async writing + 1–2 live calls per week
• Located in Latin America (Argentina, Colombia, Mexico, Uruguay ideal)
• Treats security, accessibility, and observability as first-class concerns
• Curious and coachable — we're a small team building together. You share your thinking, ask good questions, take feedback well.

How we work (traits that matter):

Skepticism + delegation: trust the process (writing agent + reviewer agent + CI), not any single generation. Claude lies confidently sometimes — you know that.

Reviews behavior, not implementations: you run the feature, read test names, trust the reviewer subagent. No reading working code line-by-line.

Ownership end-to-end: feature, edge cases, error states, reliability — all yours.

Founder-friendly: direct access, doesn't wait to be told.

If you've shipped a feature you're proud of and can explain which parts came from you and which from the AI — talk to us.

Strong plus (if you have it)

Not required — but these help you ramp faster:

AI workflow experience:

• You've used Claude Code's slash commands, skills, or agent features
• You can explain how you validate AI output beyond "I read it" — test patterns, review habits, sanity checks
• You follow AI dev tooling trends and have opinions about Claude Code, Cursor, Windsurf, etc.
• You've used Claude Code's slash commands, skills, or agent features
• You can explain how you validate AI output beyond "I read it" — test patterns, review habits, sanity checks
• You follow AI dev tooling trends and have opinions about Claude Code, Cursor, Windsurf, etc.

Product domain experience:

• Stripe integration (webhooks, idempotency, subscription lifecycle)
• Meta Marketing API (campaign creation, lead generation, audience targeting)
• Supabase Auth (SSR + PKCE flows, session management, RLS policies)
• Vercel deployment and serverless patterns
• Stripe integration (webhooks, idempotency, subscription lifecycle)
• Meta Marketing API (campaign creation, lead generation, audience targeting)
• Supabase Auth (SSR + PKCE flows, session management, RLS policies)
• Vercel deployment and serverless patterns

Background signals:

• A side project that real people use (not just GitHub repos with no users)
• Early-stage startup or solo-founder experience
• You've contributed to or maintained an open-source project
• A side project that real people use (not just GitHub repos with no users)
• Early-stage startup or solo-founder experience
• You've contributed to or maintained an open-source project

Compensation (transparent ladder, performance-gated):

• Start: USD $2,500/mo
• Day 90: $2,500/mo + $1,500 performance bonus
• Day 180: $3,000/mo + $1,500 performance bonus
• Day 270: $3,500/mo + $1,500 performance bonus
• Day 365: $4,000/mo + $2,500 anniversary bonus + $1,500 laptop budget
• Year 2+: Annual review. Strong performers reach $4,500-$5,500/mo.

Plus 13th-month salary every December.

Contract: Indefinite-term, 30-day notice. 10 days PTO + your country's holidays + company shutdown Dec 24–Jan 1.

Tools provided: Claude Max 20x ($200/mo value).

Hiring process:

1. Application screening (we read every one)
2. 20-min async video interview
3. 5-day paid trial — $300 flat to ship a small feature using Claude Code + /review
4. 1-hour live pair-coding session

GETONBRD Job ID: 61320

** Fully remote **

Candidates can reside anywhere in the world.

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