Jobs

We expect you are

You’re ready to dive into different challenges and propose a solution. You’re a problem solver with great communication skills, who’re not afraid to take responsibility. You do really care about results and commitment. Bigger challenges — not a problem but an opportunity for you. What is more, you are always in touch with what happens around you so we expect a proactive approach.

Responsibilities

• Develop an internal billing system in cooperation with billing manager and a team.
• Cover the most important part of the system with automatic tests.
• In cooperation with Billing manager create a system of core metrics to monitor, setup its monitoring. Continuously monitor these metrics.
• Troubleshoot the billing system, investigate possible troubles with key metrics, make fixes.
• Implement new functionality based on the Billing managers roadmap.
• Continuously explore and implement best existing and emerging practices in the domain area which lead the system to better meet business goals.
• Make quick MVP and tests for validation of some uncertain hypothesis.
• Cooperate with billing clients engineering teams, educate them on billing usage, discuss existing and emerging needs, find the most effort/profit optimal solution to satisfy it.
• Troubleshoot clients issues related with usage of the billing system.

Requirements

• 5+ years in Software development.
• Commercial experience with Ruby (main) / GoLang / TS.
• Commercial experience with AWS.
• Solid experience with data analysis, monitoring key metrics & launching technical A/B test to improve business metrics that technical solution solves.
• Proven experience of work as a solo-team without supervision.
• Proven experience of creating a system architecture from scratch.
• Strong Computer Science fundamentals.
• Strong proven experience with Relational and NonSQL databases.
• Strong proven experience with RESTful API approach.
• Strong proven experience with CI/CD (gitlab).
• Familiar with Microservices.
• Experience with Docker.
• Strong understanding of why we should write tests and documentation.
• Experience with frontend.
• Basic understanding (or willingness to learn) how payment processing works for credit cards & digital wallets (Apple Pay, Google Pay).
• Basic understanding of data securing practises & building secure systems.
• English B2+.

Previous experience with the Finance domain will be a plus.

We are seeking a Strong Middle/ Senior Ruby on Rails Developer experienced in modern Ruby and Rails technologies. In this role, you will develop innovative solutions and provide ongoing support for our existing applications.

What You Bring

• Ruby & Rails Expertise:
  • At least 3 year of Ruby development experience
  • Hands-on experience with Ruby 3+ and Rails 7/8
• Database & Version Control:
  • Strong proficiency with MySQL/PG
  • Solid experience with Git in collaborative development environments
• Technical Agility:
  • Ability to work with legacy code, refactor effectively, and optimize application performance
  • Strong problem-solving skills and the aptitude for working autonomously in a high-impact, small team
• AI Product Experience:
  • Exposure to AI product development and integration is highly desirable
  • Ability to contribute to AI-driven projects while ensuring robust application support
• Communication:
  • English Upper+
  • Clear documentation skills and the ability to articulate technical decisions and provide constructive feedback during code reviews

Your Responsibilities

• Design & Development:
  • Architect, develop, and estimate new Ruby on Rails applications with a focus on AI product features
  • Collaborate with cross-functional teams to define, design, and implement innovative AI-driven features
• Maintenance & Support:
  • Maintain and enhance our existing applications, ensuring their optimal performance and scalability
  • Refactor legacy code and implement enhancements to support new AI functionalities
• Troubleshooting:
  • Proactively debug and resolve issues to ensure the seamless operation of both new AI products and existing apps
   

Job Details

• Employment Type: Part-time (Contract-Based, with monthly payments)
• Location: Fully Remote

If you're passionate about leveraging Ruby on Rails for cutting-edge AI solutions and are excited by the challenge of balancing new development with ongoing application support, we’d love to hear from you.

Requirements:

At least 2-3 years experience programming in Ruby on Rails

Modern Ruby (3+), modern rails (7+)

Practical experience with RDBMS (preferably PostgreSQL)

Experience implementing APIs

Loves working in an Agile environment, Jira

Experience with source control tools — Git, Github

Experience with UNIX/Linux command line

Ability to solve problems using best practices and principles

Working closely with front-end developers

Will be a plus:

Third-party APIs integrations

TDD

DDD

Knowledge of server management (deployment, monitoring, optimizing, etc.)

Experience working in micro service architecture projects

Experience with Sidekiq

Experience with Elasticsearch

Knowledge of design patterns, basic algorithms and data structures

We offer:

Interesting project and challenging tasks

Professional & career growth

Vacation and sick leaves

Responsibilities:

Work closely together with business, design and other stakeholders of project

Write robust manageable code

Work in an agile team, participation in planning sprints, daily meetings, retrospectives, code reviews

Write unit and integration tests, bugs fixing and provide continuous integration

Use JIRA bug-tracking system, Time Tracker

Suggest ideas to improve work

Be a self-motivated and result oriented team player

About us:

Health24 is a medical information service for cloud storage, online processing and secure real-time sharing of medical information for healthcare workers and patients.

More details here — health24.ua

We are inviting you, a highly motivated and results-oriented Ruby Engineer to join our team for ensuring solutions, as well as strengthening the product.
Our team has unique expertise in research, analysis, and product development. By relying on technical insights and a data-driven approach, we create disruptive future-defining innovations of the fin-tech industry that remain our basis for success.

Responsibilities

• Developing new features mostly for the backend part
• Integrations with payment systems, developing anti-money laundering module
• Development of AI tool for Customer Support, evolve Customer Acquisition flow
• Development of API for integration with trading platform
• Optimization, and improvement of the product
• Taking part in technical architecture and design
• Performing code review, production support
• Participating in Scrum and OKR retrospectives and planning to provide feedback and synchronize on new development within the team

• Writing unit/integration tests and docs for implemented functionality

   

Requirements

• 4+ years of Ruby development experience
• Strong knowledge of design patterns, basic algorithms, and data structures
• Experience with design scalable web applications
• Experience with Ruby on Rails 6+
• Expertise in working with databases (MySQL, Postgres, Redis)

• Skills in writing unit/integration tests

   

Will be a plus

• Experience in fintech
• Experience with service architecture and RabbitMQ
• Experience with GraphQL
• Experience with HTML/CSS, JavaScript

• Experience in integration with third party payment providers

   

We offer

• Tax expenses coverage for private entrepreneurs in Ukraine
• Expert support and guidance for Ukrainian private entrepreneurs
• 20 paid vacation days per year
• 10 paid sick leave days per year
• Public holidays as per the company’s approved Public holiday list
• Medical insurance
• Opportunity to work remotely
• Professional education budget
• Language learning budget
• Wellness budget (gym membership, sports gear and related expenses)

Code&Care — is a successful full-stack development company, which provides clients with high-quality development assistance worldwide.

Now our team has a position for Full stack Ruby on Rails developer.

Requirements:

• 3+ years of experience with Ruby on Rails;

• Experience with TypeScript for Frontend and Backend;

• Express Next or Angular;

• Knowledge of OOP, AWS, Git, available to use SHH connections, understanding of Docker or Vagrant concept;

• Upper-Intermediate level of English;

• 5-6 hours of overlap with Chicago time zone.

Responsibilities:

• Write and maintain efficient, reusable, clean, and tested code;

What the company offers:

• Constant and interesting work with foreign clients;

• Flexible working hours;

• Annual paid 30 days vacation and 10 paid sick day;

• Medical insurance policy;

• 50% cost compensation of sports and English lessons.

We are an iGaming company with over 4+ years of experience and a team of more than 1300+ specialists. 

Our achievements include 10+ major projects that are popular among our clients and successfully operate in Tier 1-3 countries.
The company attracts and values highly qualified specialists, which allows us to efficiently build processes and successfully expand our presence in new locations. 

Join the team that launches new projects in various markets and shapes the future of the iGaming industry.
 

Key Responsibilities:

• Support and development of the open-source Chatwoot platform.
• Customization of functionality to fit internal processes.
• Integration of Chatwoot with external services via API and Webhooks.

Working with the frontend (Vue) to make adjustments to the interface and chat widget.

Experience & Required Skills:

• Experience in Ruby on Rails development (must)
• Proficiency in working with PostgreSQL, Redis, Sidekiq.
• Knowledge of Vue, TypeScript, and JavaScript.

Why you should join us:

• Paid vacation and sick leave – we care about your health and timely rest. Additionally, you will have a day off in honor of your Birthday.
• Cool creative gifts for holidays and events – we know how important it is to delight our employees on special occasions.
• Competitive salary – your contribution will be properly valued.
• Participation in company internal events – knowledge exchange among colleagues and enhancing your expertise.
• Freedom from micromanagement and rigid hierarchies – we make decisions quickly, and you can always reach out for advice directly from any team member.
• Referral program in the company – build a dream team with us and receive nice bonuses.
• 100% guaranteed professional development and acquisition of new skills.

We are looking for a Strong Middle Ruby Developer to join the development of a product that truly helps people and businesses save energy and money. You will work in a startup environment with high autonomy and the opportunity to influence the product.

Requirements

 • Experience with Ruby on Rails - 3-5 years of experience

 • Python skills for data processing and integration

 • Interest in data visualization (Grafana / Kibana / Metabase)

 • Self-motivated, product-oriented

 • Upper intermediate English

Will be a plus
• Experience with Hotwire is a plus

Key Responsibilities

 • Develop web applications on Ruby on Rails - infrastructure development, new features, testing.

 • Process and integrate data using Python / FastAPI - integration, cleaning, automation) Backend interfacing with a versioned Python microservice (FastAPI).

 • Create and configure Grafana dashboards - view creation, alerting, indicators.

 • Document code, implement CI/CD, participate in code reviews and QA 

 • Mobile development using Hotwire for iOS and Android

Project Description

An innovative startup in the field of smart energy management. The platform enables users and businesses to reduce peak electricity consumption and earn financial rewards. Technically, the project includes a web platform on Ruby on Rails, microservices on Python / FastAPI, and mobile applications via Hotwire.

We are looking for a Senior Ruby on Rails Engineer to join a long-term project in the insurance domain. The role requires strong backend expertise, architectural mindset, and excellent communication skills.

Project details:

• Industry: Insurance
• Client: Established EU partner (5+ years of cooperation, 10+ active projects)
• Format: Remote, full-time (8h/day)
• Start: November 2025
• Duration: 6+ months (with possible extension)

• Process: 1 interview with our partners + 1–2 interviews with the end client

   

Requirements:

• 7+ years of backend development experience
• 4+ years with Ruby on Rails
• Strong understanding of backend architecture & HTTP protocols
• Excellent knowledge of relational databases (PostgreSQL preferred)
• Cloud experience (AWS) is a plus
• Strong English communication skills
• Must be EU-based

We offer:

• Long-term cooperation with a stable client
• Competitive rates (discussed individually)
• Remote-friendly environment with optional onsite visits if needed

📩 If you’re an experienced Ruby on Rails Engineer based in the EU and looking for a stable long-term role — feel free to apply!

We are looking for a Strong Middle Ruby Developer to join the development of a product that truly helps people and businesses save energy and money. You will work in a startup environment with high autonomy and the opportunity to influence the product.

Requirements

 • Experience with Ruby on Rails - 3-5 years of experience

 • Python skills for data processing and integration

 • Interest in data visualization (Grafana / Kibana / Metabase)

 • Self-motivated, product-oriented

 • Upper intermediate English

Will be a plus
• Experience with Hotwire is a plus

Key Responsibilities

 • Develop web applications on Ruby on Rails - infrastructure development, new features, testing.

 • Process and integrate data using Python / FastAPI - integration, cleaning, automation) Backend interfacing with a versioned Python microservice (FastAPI).

 • Create and configure Grafana dashboards - view creation, alerting, indicators.

 • Document code, implement CI/CD, participate in code reviews and QA 

 • Mobile development using Hotwire for iOS and Android

Project Description

An innovative startup in the field of smart energy management. The platform enables users and businesses to reduce peak electricity consumption and earn financial rewards. Technically, the project includes a web platform on Ruby on Rails, microservices on Python / FastAPI, and mobile applications via Hotwire.

Code&Care — is a successful full-stack development company, which provides clients with high-quality development assistance worldwide.

Now our team has a position for Full stack Ruby on Rails developer.

Requirements:

• 3+ years of experience with Ruby on Rails;

• Experience with TypeScript for Frontend and Backend;

• Express Next or Angular;

• Knowledge of OOP, AWS, Git, available to use SHH connections, understanding of Docker or Vagrant concept;

• Upper-Intermediate level of English;

• 5-6 hours of overlap with Chicago time zone.

Responsibilities:

• Write and maintain efficient, reusable, clean, and tested code;

What the company offers:

• Constant and interesting work with foreign clients;

• Flexible working hours;

• Annual paid 30 days vacation and 10 paid sick day;

• Medical insurance policy;

• 50% cost compensation of sports and English lessons.

Hi to everyone reading this!

We’re currently looking for a Middle+ Ruby Developer to join our team in a full-time collaboration format.

About us:
Mind Studios specializes in mobile and web app development, helping businesses unlock their potential and turn ideas into profitable products.
Our key domains include: Real Estate, Logistics, Healthcare, Fitness, and Mental Health.

Our achievements:
— 12 years in the IT market;
— Offices in Dnipro, Kyiv, and Vienna;
— Over 90 professionals on our team.

What we offer:

— Work in a professional team building innovative products;
— Support for your growth: regular performance reviews, assessments & personal development plans;
— Education budget tailored to your skills and experience;
— Flexibility: work remotely or from one of our offices;
— Paid vacations and sick leaves;
— Transparency: monthly company updates.
 

In this role, you will:
— Design, development and further support of web-applications created with Ruby and using the Rails framework;
— Testing applications using unit-tests and integration testing, according to company standards and best practices;
— Development and support of high-load systems architecture;
— Analysis of the code and architecture of applications in order to identify and eliminate technical problems, including reviewing and providing high-quality feedback on code and architectural solutions created by other developers;
— Work according to Gitflow adopted by the company, using Git and Gitlab to control and manage source code;

— Development of documentation for web application APIs.

What is important to join us:

— 4+ years of experience with Ruby;

— Strong knowledge and practice:

— Experience with Postman, Swagger or other tools for API documentation;

— Ruby on Rails, Network Protocols;

— REST API, Popular Gems (Sidekiq, Rpush, CarrierWave, RABL etc.) , PostgreSQL;

— HTML/CSS (HAML/SASS), Javascript, GIT, Linux;

— Basic knowledge of AWS

— English Intermediate is required.

It’s great if you additionally have:

— Docker, NoSQL (Redis), Payment Gateways (Stripe, Paypal);

— Design application architecture;

— Excellent debugging and troubleshooting skills.

About stages:

1st stage: pre-interview with a recruiter;

2nd stage: interview with Team Lead and People Ops;

3rd stage: english test;

4th stage: offer.

What makes us different from others?

We are focused on results, not on processes, although we make sure there is no mess.

You are going to have a solid influence on the product and its future strategy.

We build products for users, not for clients, and sometimes it is OK to say a reasoned “No” to the customer.