Ruby Labs Ltd.

About Ruby Labs Ltd.

Ruby Labs Ltd. is a London-based product studio that builds and scales consumer subscription mobile and web applications. The company focuses on health, wellness, and productivity verticals, developing apps such as Hint, Able, and the award-winning fitness platform FitCoach. Using data-driven growth and proprietary technology, Ruby Labs rapidly prototypes, launches, and iterates products to serve millions of global users. The team combines engineering, product design, and performance marketing expertise to create sustainable digital businesses. Founded in 2018, Ruby Labs operates a portfolio of self-funded apps, emphasizing user privacy, scientific validation, and long-term customer value.

Open Positions at Ruby Labs Ltd.

Senior AI Engineer

Ruby Labs Ltd.

European Union

Full-time

Expires Sep 19, 2026

Python

JavaScript

TypeScript

+5 more

22 hours ago

Growth Manager (Conversion Rate Optimization)

Ruby Labs Ltd.

European Union

Full-time

Expires Sep 14, 2026

Go

Ruby

Remote

6 days ago

QA Engineer (Manual, Web / Product Quality)

Ruby Labs Ltd.

Ukraine

Full-time

Expires Sep 8, 2026

Go

Ruby

REST

+2 more

12 days ago

Senior Google UAM

Ruby Labs Ltd.

Ukraine

Full-time

Expires Sep 8, 2026

Go

Ruby

Senior

+1 more

12 days ago

Head of User Acquisition

Ruby Labs Ltd.

Ukraine

Full-time

Expires Sep 7, 2026

Go

Ruby

Design

+1 more

13 days ago

Senior IOS Engineer

Ruby Labs Ltd.

European Union

Full-time

Expires Sep 7, 2026

Go

Ruby

Swift

+5 more

13 days ago

Senior Project Manager (Delivery)

Ruby Labs Ltd.

European Union

Full-time

Expires Sep 7, 2026

Go

Ruby

Senior

+1 more

13 days ago

Senior AI Engineer

Ruby Labs Ltd.

European Union

Full-time

Expires Sep 7, 2026

Python

JavaScript

TypeScript

+5 more

13 days ago

Senior User Acquisition Manager

Ruby Labs Ltd.

European Union

Full-time

Expires Sep 7, 2026

Go

Ruby

Design

+2 more

13 days ago

Billing Data Analyst

Ruby Labs Ltd.

Ukraine

Full-time

Expires Sep 7, 2026

Python

Go

Ruby

+2 more

13 days ago

Senior Android Engineer

Ruby Labs Ltd.

European Union

Full-time

Expires Sep 7, 2026

Go

Ruby

Kotlin

+5 more

13 days ago

Lead IOS Engineer

Ruby Labs Ltd.

European Union

Full-time

Expires Sep 7, 2026

Go

Ruby

Swift

+6 more

13 days ago

Lead Billing Data Analyst | Billing, Payments & Subscription Analytics

Ruby Labs Ltd.

Ukraine

Full-time

Expires Sep 7, 2026

Python

Go

Ruby

+2 more

13 days ago

Lead Android Developer

Ruby Labs Ltd.

European Union

Full-time

Expires Sep 7, 2026

Go

Ruby

Kotlin

+6 more

13 days ago

Google Ads Manager (AI Native)

Ruby Labs Ltd.

European Union

Full-time

Expires Sep 7, 2026

Go

Ruby

Remote

13 days ago

Senior CRO Manager

Ruby Labs Ltd.

European Union

Full-time

Expires Sep 7, 2026

JavaScript

Go

Ruby

+4 more

13 days ago

CMS Template Engineer

Ruby Labs Ltd.

European Union

Full-time

Expires Sep 7, 2026

Go

Ruby

Remote

13 days ago

Senior Character & Motion Animator

Ruby Labs Ltd.

European Union

Full-time

Expires Sep 7, 2026

Go

Ruby

React

+2 more

13 days ago

PDF Forms Operations Specialist

Ruby Labs Ltd.

European Union

Full-time

Expires Sep 7, 2026

Go

Ruby

Remote

13 days ago

Market Monitoring Specialist

Ruby Labs Ltd.

Ukraine

Full-time

Expires Sep 2, 2026

Go

Ruby

Remote

18 days ago

Creative Designer

Ruby Labs Ltd.

European Union

Full-time

Expires Sep 2, 2026

Go

Ruby

Node.js

+2 more

18 days ago

Senior Email Marketing Manager

Ruby Labs Ltd.

European Union

Full-time

Expires Sep 2, 2026

Go

Ruby

Senior

+1 more

18 days ago

Senior ASO Manager

Ruby Labs Ltd.

European Union

Full-time

Expires Sep 2, 2026

Go

Ruby

C++

+3 more

18 days ago

Senior React Native Developer

Ruby Labs Ltd.

European Union

Full-time

Expires Sep 2, 2026

Go

Ruby

React

+5 more

18 days ago

Senior Full-Stack Engineer (Next.js)

Ruby Labs Ltd.

Ukraine

Full-time

Expires Aug 25, 2026

JavaScript

TypeScript

Go

+5 more

26 days ago

Full-Stack Engineer (Next.js)

Ruby Labs Ltd.

Ukraine

Full-time

Expires Aug 25, 2026

26 days ago

CRO & Growth Manager

Ruby Labs Ltd.

Poland

Full-time

Expires Aug 23, 2026

Go

Ruby

Remote

28 days ago

Growth Product Specialist

Ruby Labs Ltd.

Ukraine

Full-time

Expires Aug 18, 2026

Go

Ruby

Remote

1 month ago

Email Growth Manager

Ruby Labs Ltd.

European Union

Full-time

Expires Aug 15, 2026

Go

Ruby

Remote

1 month ago

Ruby Labs Ltd.

European Union

Full-time

Expires Aug 15, 2026

JavaScript

Go

Ruby

+2 more

1 month ago

Senior Creative Producer

Ruby Labs Ltd.

European Union

Full-time

Expires Aug 15, 2026

Go

Ruby

Senior

+1 more

1 month ago

Project Manager / Product Owner

Ruby Labs Ltd.

European Union

Full-time

Expires Aug 15, 2026

Go

Ruby

Product Management

+1 more

1 month ago

2D Graphic and Motion Designer

Ruby Labs Ltd.

Ukraine

Full-time

Expires Aug 13, 2026

Go

Ruby

Design

+1 more

1 month ago

SaaS QA Engineer

Ruby Labs Ltd.

Ukraine

Full-time

Expires Aug 12, 2026

Go

Ruby

Remote

1 month ago

Full-Stack Engineer (Next.js)

Ruby Labs Ltd.

Ukraine

Full-time

Expires Aug 12, 2026

JavaScript

TypeScript

Go

+4 more

1 month ago

Senior AI Software Engineer

Ruby Labs Ltd.

European Union

Full-time

Expires Aug 12, 2026

Python

JavaScript

TypeScript

+4 more

1 month ago

Ruby Labs Ltd.

European Union

Full-time

Expires Aug 12, 2026

Python

JavaScript

TypeScript

+4 more

1 month ago

Senior User Acquisition Manager (Brazilian Market)

Ruby Labs Ltd.

Brazil

Full-time

Expires Aug 12, 2026

Go

Ruby

Design

+2 more

1 month ago

Senior User Acquisition Manager (TikTok)

Ruby Labs Ltd.

Serbia

Full-time

Expires Aug 12, 2026

Go

Ruby

Design

+2 more

1 month ago

Senior Growth Product Manager

Ruby Labs Ltd.

Serbia

Full-time

Expires Aug 12, 2026

Go

Ruby

Product Management

+2 more

1 month ago

Senior User Acquisition Manager (Bing)

Ruby Labs Ltd.

Serbia

Full-time

Expires Aug 12, 2026

Go

Ruby

Design

+2 more

1 month ago

Lead User Acquisition Manager

Ruby Labs Ltd.

Serbia

Full-time

Expires Aug 12, 2026

Go

Ruby

Design

+2 more

1 month ago

Social Media Ads Manager (Paid Social)

Ruby Labs Ltd.

European Union

Full-time

Expires Aug 12, 2026

Go

Ruby

Remote

1 month ago

Creative Producer

Ruby Labs Ltd.

Ukraine

Full-time

Expires Aug 12, 2026

Go

Ruby

Remote

1 month ago

Database Engineer

Ruby Labs Ltd.

European Union

Full-time

Expires Aug 12, 2026

Go

Ruby

Gin

+3 more

1 month ago

Senior User Acquisition Manager (Facebook)

Ruby Labs Ltd.

Serbia

Full-time

Expires Aug 12, 2026

Go

Ruby

Design

+2 more

1 month ago

Expires soon

Junior User Acquisition Manager

Ruby Labs Ltd.

Ukraine

Full-time

Expires Jul 27, 2026 (Soon)

2 months ago

Expires soon

Senior CRO Manager

Ruby Labs Ltd.

European Union

Full-time

Expires Jul 27, 2026 (Soon)

Go

Ruby

Senior

+2 more

2 months ago

Expires soon

MCP Engineer / AI Backend Engineer

Ruby Labs Ltd.

European Union

Full-time

Expires Jul 25, 2026 (Soon)

JavaScript

TypeScript

Ruby

+4 more

2 months ago

Expires soon

UX Lead (Product & Growth)

Ruby Labs Ltd.

Ukraine

Full-time

Expires Jul 25, 2026 (Soon)

JavaScript

Go

Ruby

+5 more

2 months ago

Expires soon

UX Lead (Product & Growth)

Ruby Labs Ltd.

European Union

Full-time

Expires Jul 25, 2026 (Soon)

2 months ago

Expired

Golang Developer

Ruby Labs Ltd.

Ukraine

Full-time

Expired Jul 21, 2026

Go

Ruby

PostgreSQL

+3 more

2 months ago

Expired

Ruby Labs Ltd.

Ukraine

Full-time

Expired Jul 21, 2026

Python

JavaScript

TypeScript

+4 more

2 months ago

Expired

Senior CRO Manager

Ruby Labs Ltd.

European Union

Full-time

Expired Jul 21, 2026

Go

Ruby

Senior

+2 more

2 months ago

Expired

Head of User Acquisition

Ruby Labs Ltd.

European Union

Full-time

Expired Jul 21, 2026

Go

Ruby

Design

+1 more

2 months ago

Expired

Senior Full-Stack Engineer (Next.js)

Ruby Labs Ltd.

Ukraine

Full-time

Expired Jul 20, 2026

JavaScript

TypeScript

Go

+5 more

2 months ago

Expired

Product Manager – Mobile Platform

Ruby Labs Ltd.

European Union

Full-time

Expired Jul 20, 2026

Go

Ruby

iOS

+4 more

2 months ago

Expired

Middle Full-Stack Engineer

Ruby Labs Ltd.

European Union

Full-time

Expired Jul 20, 2026

JavaScript

TypeScript

Go

+5 more

2 months ago

Expired

Junior User Acquisition Manager

Ruby Labs Ltd.

Ukraine

Full-time

Expired Jul 20, 2026

Go

Ruby

Design

+2 more

2 months ago

Expired

Growth Product Manager

Ruby Labs Ltd.

Serbia

Full-time

Expired Jul 16, 2026

Go

Ruby

Product Management

+1 more

2 months ago

Expired

Senior Google User Acquisition Manager

Ruby Labs Ltd.

Ukraine

Full-time

Expired Jul 15, 2026

Go

Ruby

Design

+2 more

2 months ago

Expired

Senior Meta User Acquisition Manager

Ruby Labs Ltd.

Ukraine

Full-time

Expired Jul 15, 2026

Go

Design

Senior

+1 more

2 months ago

Expired

Senior Data Analyst

Ruby Labs Ltd.

Serbia

Full-time

Expired Jul 15, 2026

Python

Go

Ruby

+4 more

2 months ago

Expired

Operations & Digital Content Specialist: Legal Templates and Forms

Ruby Labs Ltd.

European Union

Full-time

Expired Jul 15, 2026

Go

Ruby

Remote

2 months ago

Expired

Senior Legal Specialist (Content & Platform enforcement)

Ruby Labs Ltd.

Ukraine

Full-time

Expired Jul 15, 2026

Go

Ruby

Senior

+1 more

2 months ago

Expired

Senior Full-Stack Developer

Ruby Labs Ltd.

Ukraine

Full-time

Expired Jul 15, 2026

JavaScript

TypeScript

Go

+5 more

2 months ago

Expired

UX Lead (Product & Growth)

Ruby Labs Ltd.

European Union

Full-time

Expired Jul 15, 2026

JavaScript

Go

Ruby

+5 more

2 months ago

Expired

Graphic Designer

Ruby Labs Ltd.

European Union

Full-time

Expired Jul 11, 2026

Go

Ruby

Design

+1 more

2 months ago

Expired

CRO Manager (use.ai)

Ruby Labs Ltd.

European Union

Full-time

Expired Jul 11, 2026

Go

Ruby

Remote

2 months ago

Expired

Growth Manager (use.ai)

Ruby Labs Ltd.

European Union

Full-time

Expired Jul 11, 2026

Go

Ruby

Remote

2 months ago

Expired

Manual QA Engineer

Ruby Labs Ltd.

Ukraine

Full-time

Expired Jul 9, 2026

Go

Ruby

PostgreSQL

+3 more

2 months ago

Expired

Senior Full-Stack Developer (Next.js)

Ruby Labs Ltd.

Ukraine

Full-time

Expired Jul 7, 2026

JavaScript

TypeScript

Go

+5 more

2 months ago

Expired

Middle Full-Stack Developer (Next.js, Node.js)

Ruby Labs Ltd.

Serbia

Full-time

Expired Jul 7, 2026

JavaScript

Go

Ruby

+5 more

2 months ago

Expired

Ruby Labs Ltd.

European Union

Full-time

Expired Jul 5, 2026

Go

Ruby

Remote

3 months ago

Expired

UX Lead (Product & Growth)

Ruby Labs Ltd.

Ukraine

Full-time

Expired Jul 5, 2026

JavaScript

Go

Ruby

+5 more

3 months ago

Expired

Frontend Designer

Ruby Labs Ltd.

European Union

Full-time

Expired Jul 5, 2026

JavaScript

TypeScript

Go

+4 more

3 months ago

Expired

Senior UX Researcher

Ruby Labs Ltd.

Ukraine

Full-time

Expired Jul 5, 2026

Go

Ruby

Design

+2 more

3 months ago

Expired

Senior User Acquisition Manager (Meta & TikTok)

Ruby Labs Ltd.

Ukraine

Full-time

Expired Jul 3, 2026

Go

Ruby

iOS

+3 more

3 months ago

Expired

Senior Recruiter

Ruby Labs Ltd.

Ukraine

Full-time

Expired Jul 2, 2026

Go

Ruby

GitHub

+3 more

3 months ago

Expired

Middle Full-Stack Developer

Ruby Labs Ltd.

Ukraine

Full-time

Expired Jul 2, 2026

JavaScript

Go

Ruby

+5 more

3 months ago

Expired

Ruby Labs Ltd.

European Union

Full-time

Expired Jul 2, 2026

Python

JavaScript

TypeScript

+4 more

3 months ago

Expired

Ruby Labs Ltd.

European Union

Full-time

Expired Jul 2, 2026

JavaScript

Go

Ruby

+2 more

3 months ago

Expired

Senior Full-Stack Engineer

Ruby Labs Ltd.

European Union

Full-time

Expired Jul 2, 2026

JavaScript

TypeScript

Go

+5 more

3 months ago

Expired

Product Manager

Ruby Labs Ltd.

European Union

Full-time

Expired Jul 2, 2026

Go

Ruby

Product Management

+2 more

3 months ago

Expired

Integration Engineer (JavaScript SDK & APIs)

Ruby Labs Ltd.

Ukraine

Full-time

Expired Jun 27, 2026

JavaScript

TypeScript

Go

+4 more

3 months ago

Expired

Lead User Acquisition Manager

Ruby Labs Ltd.

Ukraine

Full-time

Expired Jun 26, 2026

Go

Ruby

Design

+2 more

3 months ago

Expired

Junior Next.js Developer

Ruby Labs Ltd.

Ukraine

Full-time

Expired Jun 25, 2026

JavaScript

Go

Ruby

+3 more

3 months ago

Expired

Junior Motion Designer

Ruby Labs Ltd.

Ukraine

Full-time

Expired Jun 25, 2026

Go

Ruby

Design

+2 more

3 months ago

Expired

Junior–Mid Full Stack Engineer

Ruby Labs Ltd.

European Union

Full-time

Expired Jun 25, 2026

JavaScript

TypeScript

Go

+5 more

3 months ago

Expired

Senior CRO Manager

Ruby Labs Ltd.

European Union

Full-time

Expired Jun 23, 2026

Go

Ruby

Senior

+2 more

3 months ago

Expired

User Acquisition Manager

Ruby Labs Ltd.

European Union

Full-time

Expired Jun 23, 2026

Go

Ruby

React

+2 more

3 months ago

Expired

User Acquisition Manager

Ruby Labs Ltd.

European Union

Full-time

Expired Jun 23, 2026

Go

Ruby

React

+2 more

3 months ago

Expired

Ruby Labs Ltd.

European Union

Full-time

Expired Jun 21, 2026

Go

Ruby

Remote

+1 more

3 months ago

Expired

Ruby Labs Ltd.

Ukraine

Full-time

Expired Jun 21, 2026

3 months ago

Expired

Email Growth Manager

Ruby Labs Ltd.

European Union

Full-time

Expired Jun 21, 2026

Go

Ruby

Remote

3 months ago

Expired

UX/UI Frontend Developer

Ruby Labs Ltd.

Serbia

Full-time

Expired Jun 21, 2026

JavaScript

TypeScript

Go

+4 more

3 months ago

Expired

Junior AI Engineer

Ruby Labs Ltd.

European Union

Full-time

Expired Jun 21, 2026

JavaScript

TypeScript

Go

+5 more

3 months ago

Expired

Growth & CRO Specialist

Ruby Labs Ltd.

Ukraine

Full-time

Expired Jun 21, 2026

Go

Ruby

Remote

3 months ago

Expired

Ruby Labs Ltd.

Spain

Full-time

Expired Jun 21, 2026

Python

JavaScript

TypeScript

+4 more

3 months ago

Expired

Ruby Labs Ltd.

Ukraine

Full-time

Expired Jun 18, 2026

TypeScript

Go

Ruby

+2 more

3 months ago

Expired

Head of Product

Ruby Labs Ltd.

Ukraine

Full-time

Expired Jun 16, 2026

Go

Ruby

Remote

3 months ago

Expired

Senior Next.js Full Stack Engineer

Ruby Labs Ltd.

European Union

Full-time

Expired Jun 16, 2026

JavaScript

TypeScript

Go

+5 more

3 months ago

Expired

Head of User Acquisition

Ruby Labs Ltd.

Ukraine

Full-time

Expired Jun 16, 2026

Go

Ruby

Design

+1 more

3 months ago

Expired

Ruby Labs Ltd.

European Union

Full-time

Expired Jun 14, 2026

Python

JavaScript

TypeScript

+4 more

3 months ago