Junior Full-Stack Developer (Contract)

Bells of Steel; Calgary; Hybrid; CAD 52,000 - 76,000; Part time

Benefits offered by this job

Health Spending Account

Calgary office

Employee discounts

Staff gym

Team culture

Job summary

Bells Of Steel Inc. is hiring a new-grad builder to develop a training app used with existing gear. You’ll ship complete features across the app and backend, working directly with the founder and ML specialist. This hybrid Calgary role requires in-person collaboration several days a week.

You’ll be coding in React Native/Expo with TypeScript, integrating Supabase/PostgreSQL, and delivering tests and demos on real devices. Prior onboarding and optimization for TestFlight/Android is expected.

Qualifications

• New graduate or up to ~2 years of experience welcome
• Demonstrable project or app built and ready to explain
• Experience with mobile app development (iOS/Android) preferred

Responsibilities

• Build scoped features and fixes in React Native/Expo and TypeScript
• Integrate with Supabase/Postgres and store data locally
• Ensure changes are review-friendly with tests and demo on real devices
• Assist with TestFlight and Android release readiness
• Collaborate with data/ML specialist and biomechanical engineers

Skills

React Native

Expo

TypeScript

iOS development

Android development

Testing on real devices

SQL/Postgres

Offline data

API integration

Tools

Claude Code

Supabase

PostgreSQL

TestFlight

Job description

We're looking for a builder who wants to ship an app people actually train with.

We're building a training app that makes the gear people already own more useful. Our visionary built the working version with Claude Code, and it's in private TestFlight testing now. You'll help improve it and get it released, working directly with the founder and alongside our data and ML specialist. You'll build complete features across the app and the backend, and prove they work on real phones.

This is a new grad role . You don't need years of experience. You need to have actually built things, and you need to be fast.

What's in it for you

• This is a 6-month contract role ending in March 2027, with the potential to transition to full-time based on performance and business needs
• Health Spending Account
• A Calgary office you'll actually want to come into
• Employee discounts on all our gear
• Access to our staff gym
• A team that actually likes what they do

The schedule & location

This is a hybrid role based at our Calgary location, where the core hours are Monday to Friday from 8:00am to 4:30pm

The non-negotiables

You build with Claude Code every day, and you check its work. Not "I've heard of it." Not "I've watched videos." You're living in it: you've hit the walls and figured out workarounds. You can explain every change you hand us, and you've tested it.

You lift. You know sets, reps, RPE, progression and rest periods, and you're at home around barbells, racks, benches, dumbbells and cable machines. No coaching cert needed. You'll build better workout screens if you've used one mid-set.

You're in Calgary. You live here or you'll move here before your start date. The job is hybrid but you are expected to come on-site around 3 times a week to work with our equipment, coaches and product team, so remote from another city or country won't work.

What you'll do

• Build scoped features and fixes in React Native/Expo and TypeScript, on Supabase/Postgres and local storage
• Improve the workout flows people use every day: logging sets and RPE, timers, equipment setup, workout history and sync
• Make API and data changes without crossing account boundaries or losing data after offline use, interruptions or restarts
• Hand in changes that are easy to review: focused tests, a working demo and proof it runs on a real device. Help get TestFlight and Android releases ready
• Work with the data and ML specialist on sensor and coaching screens, including manual controls and what happens when data is missing
• Work under the guidance of our 2 biomechanical engineers on the biomechanics side of things

What Success Looks Like

• Day 30: you know the codebase and you've shipped a small improvement through review
• Day 60: you're delivering app and backend changes with tests and real-device evidence
• Day 90: you own a defined area of the app and you're helping build a sensor or coaching pilot once the research supports it
• Architecture, database changes, production access and releases get reviewed with the founder before they go live. Your scope grows as you show good judgment

What We're Looking For

• One working app or meaningful project you can demo and explain. New grads and people with up to about 2 years of experience welcome
• You test on real phones, reproduce bugs carefully, and ask for help before a blocker turns into a missed deadline
• You care about clean interfaces, accessibility, maintainable code, and the people whose workout history we're storing
• Experience with iOS and Android development

Bonus Points

• React Native/Expo
• SQL/Postgres and authentication
• Automated testing and offline data
• Experience with BLE capture
• You don't need to have launched an app on your own, and you don't need to know ML.

We care more about what you've built than where you learned it.

The Interview Process

• 30 minute screening with our HR Coordinator
• 1 hour screening with our hiring team
• Paid, time-bound technical assessment
• 1 hour technical follow-up to discuss assessment
• Decision made and offer sent out

About Bells of Steel Inc.

At Bells of Steel, our mission is to make fitness and strength training approachable, affordable, and fun. We design and manufacture high-quality strength and exercise equipment for home gym owners and fitness professionals, helping people of all experience levels achieve their goals.

We’re not your typical fitness equipment brand. We’re down-to-earth, a little cheeky, and focused on making fitness more rewarding and less intimidating. If you enjoy a fast-paced, no-BS environment and want to help shape the future of strength training, you’ll fit right in.

Our Core Values: A.C.T.

Adaptability – Raise the Bar
We challenge the status quo, learn quickly, and continuously improve. We embrace change, seek better ways of working, and take initiative to drive results.

Customer Centricity – Always Spot the Customer
Everything we do is focused on helping our customers succeed. We lead with empathy, build trust through action, and create value for both external and internal customers.

Teamwork – We Win Together
We operate with honesty, transparency, trust, and respect. We collaborate openly, take shared ownership of outcomes, and succeed as a team.