Junior Full Stack Engineer

CtrLoop; Forward Township (PA); On-site; USD 60,000 - 90,000; Full time

Job summary

CtrLoop in Forward Township, PA is hiring a Junior Full Stack Engineer to work across a Django backend, a TypeScript web client, and a React Native app with Claude as your pair.

No sprints, no staging, no hand-offs. You’ll ship flag-gated features via a 10-stage pipeline, verification by running the app, and growth into the Engineer DRI role and beyond. New grads welcome; mentored by senior engineers; contribute back to the design system.

Qualifications

• New graduates welcome, 0–2 years experience in Python/JS/TS backend/frontend
• Proven ability to ship with APIs, data models, tests and SQL basics
• Experience with React on web and React Native is a plus
• Familiarity with AI-assisted coding and verification by running the app

Responsibilities

• No sprints. No staging. No hand-offs.
• Every feature runs a 10-stage pipeline where Claude does the heavy lifting and a human DRI drives every step.
• Contract-first: a frozen backend/frontend contract + simulator before any code.
• AI-native execution: Claude Code writes most of the code; you direct it, review it, and verify by running the app.
• One Design System: build using a shared component library; contribute back to the system.
• Flags, not staging: verify locally, merge behind a feature flag in production; rollback with one click.
• Artifacts, not meetings: each step outputs a structured doc for the next Claude to read.
• Done = demonstrated: screenshots, green gates, a flag, and a one-click rollback.

Skills

Python

JavaScript/TypeScript

React Native

Django

AI-native coding

Ownership & communication

Tools

Django

TypeScript

React Native

Claude AI

Job description

CtrLoop.

Why we built it

The loop Careers Contact

Careers / Open role

Junior

• Forward-Deployed track Junior Full Stack Engineer

Solid Python + JavaScript/TypeScript fundamentals and genuine AI-native fluency. You'll build across a Django backend, a TypeScript web client, and a React Native app with Claude as your pair - shipping your first flag-gated feature in your first weeks - then grow into the Engineer DRI seat and, later, into a forward-deployed engineer executing external projects.

Full-time 1 opening 0–2 years

• new grads welcome Python + JS/TS Backend


• Web


• App

What you'll do

No sprints. No staging. No hand-offs.

Every feature runs a 10-stage pipeline where Claude does the heavy lifting and a human DRI - one directly responsible engineer - drives every step.

Contract-first

A frozen backendfrontend contract + simulator before any code - so both sides build in parallel against the same reality.

AI-native execution

Claude Code writes most of the code. You direct it, review it, and verify it by running the app - not by trusting the diff.

One Design System

Every screen is composed from a living component library; anything new is contributed back. Build it in the system, not the feature.

Flags, not staging

Verify locally, merge dark behind a feature flag in production, dogfood there, flip it on. Rollback is one click.

Artifacts, not meetings

Each step outputs a structured doc the next step's Claude reads directly. Three synchronous touchpoints per feature - that's it.

Done = demonstrated

Screenshots, green gates, a flag, and a one-click rollback - never just "code written."

First 90 days

• Learn by shipping


• Ship your first flag-gated feature in your first weeks - small and well-scoped, senior-reviewed at the gates


• Build across all three surfaces: Python/Django backend, TypeScript web, React Native app (iOS + Android)


• Run the verification loop yourself: drive the flow, screenshot it, read the logs, gates green


• Contribute components and gotchas back to the Design System and conventions doc

Then

• Take the DRI seat


• Own features end-to-end: design the frozen contract + simulator from the founder's PRD


• Build backend ∥ frontend in parallel with Claude Code, integrate, drive review


• Launch behind a flag with the success metric wired to a live dashboard before the flip


• Take on bigger features as you prove out

Later

• Deploy forward


• Shadow, then co-run, then own external engagements on our portable pipeline


• Scope with the client, design the contract, build with Claude, demo, iterate liveLaunch on their stack, behind their flag

What we look for

Fundamentals, fluency, and proof you ship.

Must-haves

• Python fundamentals you've shipped with - an API in Django/DRF/FastAPI, a real data model, tests; SQL basics


• JavaScript/TypeScript fundamentals - React on web; React Native is a plus you'll deepen here


• Evidence you ship - internships, side projects, hackathons, open source; working links beat résumé lines


• AI-native working style - an AI coding tool is already your daily driver, and you verify its output by running the app


• Written clarity - our pipeline runs on structured docs; if yours needs a follow-up conversation, it isn't done


• Ownership temperament - you batch questions with a recommended default attached, and proceed on the default when the answer is slow


• 0–2 years of experience - new grads welcome; show us shipped, working things

Nice-to-haves

• Mobile exposure - React Native or Expo


• Postgres beyond the basics


• Feature flags, product analytics (Mixpanel) or error tracking (Sentry)


• LLM apps you've built, or prompt/eval tinkering


• Basics of GCP, Docker, or CI

What you get

• 01 - The operating model

  
  

  An AI-native pipeline most companies are still theorizing about - you run it daily from week one.




• 02 - Mentorship where it counts

  
  

  A senior engineer at your review gates, founders as your product pair.




• 03 - An explicit growth path

  
  

  Builder – Engineer DRI – forward-deployed engineer, with real ownership at every stage.




• 04 - Claude, on us

  
  

  Claude as your pair on everything, on the company's dime.




• 05 - Full-stack range

  
  

  Backend, web, and app in the same week - no lane assignments, no waiting on "the backend person."




• 06 - Your name on it

  
  

  From contract to metric dashboard, the feature is yours - demonstrated working, live behind a flag.

Hiring process

Built like the job.

The centrepiece is a paid, timeboxed build exercise where using AI isn't just allowed - it's required. We give you a small PRD + a frozen contract; you ship it and return a working demo, screenshots per flow, and green gates.

• Intro call


• 30 min

• Build exercise


• Paid


• timeboxed


• AI required

• Deep-dive


• 60 min


• walk us through your decisions

• Offer


• Fast

Early in your career, AI-native already? We want to meet you.

Location and compensation are discussed during the process.

Applications go to [e-mail] with the role in the subject line.

Contact

• [e-mail]


• ctrloop.ai


• © 2026 CtrLoop