Jobs Ruby

Who We Are

PAR Retail, with its Open Commerce® product suite and patent pending Wallet Steering® System, empowers Convenience & Fuel Retailers to gain more share of wallet and customer lifetime value than possible with any other solution provider. PAR Retail’s unified Open Commerce product suite consists of: Activate for Intelligent 1:1 Loyalty, Transact for Contactless Commerce, and Experience for Cross-Channel Customer Experiences. PAR Retail’s solutions are supported by a set of subscription-based program management services and are contractually backed by its 1.5X Performance Guarantee.

Technology Stack:

Ruby, Ruby on Rails, Postgres, Redis, Sidekiq, GraphQl, RabbitMQ

Requirements:

- Practical experience building systems in Ruby on Rails

- At least 6 years industry experience or equivalent

- Experience building and maintaining backend APIs, including design, implementation, evolution, and maintenance

- Familiarity with TypeScript, or similar modern strongly-typed language

- Proficiency using a variety of database technologies, both relational and non-relational

- Strong understanding and familiarity with CI/CD pipelines and automated tests

- An ability to work in service-based architectures as well as well-factored Rails monolith applications

- Highly independent and able to effectively self-organize and prioritize work

- The ability to write clean code, and the discipline to write effective automated tests to deliver high-quality system improvements

- An ability to effectively break down larger bodies of work for delivery as a series of small, self-contained changes to the system

- Excellent spoken and written communication skills

- BS/MS degree in Computer Science, Engineering, or equivalent years of professional working experience

Bonus Points

- Experience with NodeJS and React

- Experience in the retail and/or fuel & convenience industries

- Experience working in distributed teams

- Experience with Nest.js and/or GraphQL

Responsibilities:

- Collaborate closely with other Engineers, design and implement new functionality based on product objectives and requirements.

- Work with the broader product engineering team to plan and coordinate feature and functionality improvements, as well as resolve bugs and execute technical enhancements, that cross-cut large parts of our platform.

- Work to continually learn, improve technology skills, expand knowledge of the our platform technologies, and gain increasing versatility across the breadth of our platform systems.

- Expand APIs and business logic, and as needed write or revise customer-facing API documentation.

- Work with our infrastructure team to enable and enhance highly-available, performant, and well-instrumented backend applications and services that run in our customer environments at substantial scale.

- Support operations and infrastructure teams for issue resolution on relevant applications or services running in production environments.

PAR Retail Offers:

- Long-term employment;

- Competitive compensation with regular performance-based salary and career development reviews;

- Paid vacations and sick leaves;

- Flexible working hours;

- A unique and friendly environment where everyone can explore and learn new technologies.

We are looking for a Full Stack Engineer to join our team at ORIL. This is an opportunity to work on a sophisticated PropTech / MarTech platform that is currently reshaping how the real estate industry handles data. If you enjoy a high-tempo environment, love working with AI, and want to see your code make a direct impact on business decisions, this is for you.

Project: Our client is a US-based innovator providing a centralized data platform for multi-family real estate. The product uses BI and AI analytics to help operators optimize marketing spend and operational efficiency.

Tech Stack: Ruby on Rails, React, PostgreSQL, AI/LLM integrations, AWS.

What are we looking for?

• 4+ years of experience in Full Stack development using Ruby on Rails and React;
• Proactive Delivery: You are comfortable with a fast development pace. You don’t wait for detailed instructions on every edge case—you think ahead and deliver ready-to-use features;
• Technical Independence: You can take a high-level requirement and turn it into a working feature (from DB schema to UI) without constant supervision;
• Problem-Solving: You focus on making things work efficiently and aren't afraid to dig into complex data or scraping logic;
• Communication: Ability to discuss technical solutions directly with the team and the client;
• English level: Upper-Intermediate (B2).

Nice to have:

• Experience in PropTech or fast-growing SaaS startups;
• Experience with web scraping or complex data ingestion;
• Familiarity with AI/LLM integrations (OpenAI API, etc.).

What will you do?

• Develop and maintain features across the full stack (RoR + React);
• Build and optimize integrations with external property management and marketing tools;
• Work on the AI assistant’s backend logic and its UI representation;
• Help the team maintain a high tempo while keeping the code clean and scalable;
• Collaborate with the Lead dev and PM to refine the technical roadmap.

We offer:

• Competitive compensation;
• Flexibility to work from anywhere (fully remotely or in our office in Lviv);
• Accounting Support Services;
• Education budget + corporate education events/trainings;
• Compensation for certifications, fitness, or therapy sessions;
• A dynamic environment where your proactivity is recognized and rewarded.

Application Process:

1. Initial Screening: Call with Recruiter.
2. Technical Interview.
3. Client Interview.

Ready to build the future of Real Estate AI? Apply now and let’s get to work!

About Digis
Digis is a European IT company with 230+ specialists delivering complex products for 70+ clients across the U.S., Europe, and Canada. We operate in a remote-first environment and focus on long-term collaboration, stable projects, and transparent processes.

About the Project
You will join a long-term project HubSpot — one of the most recognized global platforms in CRM, marketing automation, and go-to-market solutions.

The product helps companies identify, acquire, and convert their ideal customers through powerful data-driven solutions.

Requirements

• 5+ years of commercial experience with Ruby
• English level: Upper-Intermediate+

Responsibilities

• Maintain and support the existing Ruby-based system
• Fix bugs and resolve production issues
• Upgrade libraries and dependencies
• Ensure system security and compliance
• Investigate and resolve customer-reported issues
• Work with API architecture improvements (e.g., splitting services)
• Participate in scaling and performance-related tasks

Advantages

• Work on a globally recognized product (HubSpot ecosystem)
• Long-term project
• Strong senior-level team with experienced Tech Lead and structured Product Management
• Well-organized onboarding process with dedicated time and documentation
• Focus on real engineering work (stability, scaling, performance) instead of feature rush
• Low-risk environment: no chaotic product changes, clear tasks and processes

We Offer

• 20 paid vacation days per year
• 5 paid sick leaves (no medical certificate required)
• Compensation for professional courses
• English learning support
• Work equipment
• Transparent communication and processes
• Opportunity to switch projects within Digis
• Legal and accounting support
• Corporate psychologist

Responsibilities:

• Develop new product features
• Fix bugs as they arise
• Ensure Merge Requests improve test coverage by adding new unit tests
• Document explanation of developed features/fixes to Merge Requests and to corresponding tickets
• Documenting completed tickets for internal and external users
• Contribute high-quality code to the backend and frontend projects

Requirements:

• 6+ years developing software in a commercial environment
• 4+ years of Ruby Development
• Experience with Ruby frameworks and libraries
• Experience with frontend frameworks (React)
• Experience in building REST API, ideally using Grape
• Experience in building integrations with third-party APIs via REST, SOAP, XMLRPC, etc.
• Solid experience in building high-performance, reliable, and scalable services

Bonus Points:

• WMS / Logistics domain experience
• Experience with ERP systems (NetSuite, Acumatica, Dynamics F&O/BC/NAV etc.)
• Experience with Elasticsearch
• Experience with Go, AWS, Docker, GitLab CI
• Experience with PHP, Java
• Experience with .Net

Benefits We Offer:

• Stock options
• $100/month for Health & Wellness expenses
• $500/year for medical expenses
• 20 PTO days
• Top-level hardware of your choice, ownership will be passed to you

Ready to join our team? Apply now!

FTE: Full time (40 h per week)
Timeline: 3-6 months (tbd)
Start: ASAP
English: B2
Recruitment process: a tech check with us, then an interview with the client

Requirements:
A Full-Stack Craftsman: You are an expert in Ruby on Rails and TypeScript, capable of building everything from complex dashboards and billing UIs to sleek documentation platforms.

The "DevEx" Champion: You have a natural empathy for other developers. You’ll develop deep knowledge of our platform (Pub/Sub, Chat, LiveSync) and use the product yourself to gain a first-hand understanding of the developer experience.

Comfortable with Ambiguity: You thrive in high-level vagueness. You can take a feature from a loose concept to a shipped product with minimal hand-holding, identifying problems and proposing solutions independently rather than waiting for a roadmap.

Accountable & Reliable: You take pride in high-quality, well-tested code. You meet your delivery commitments, provide realistic estimates based on technical complexity, and communicate proactively if a timeline is ever at risk.

An Owner: You monitor what you build in production and take personal ownership of quality issues. You see a feature through its entire lifecycle, from the first line of code to the final metric.

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

Our Vision & Products

🚀 EverAI — Building the Future of AI Companionship

One of the Top 15 Largest & Fastest-Growing AI Companies in the World

50 Million Users in 2 years — Help Us Reach 100M first, 500M next

At EverAI, we’re shaping what it means to connect with AI. With 50 million users and counting, we're not just building products — we're creating entirely new categories.

Our flagship product is the world’s largest AI companionship platform, redefining relationships for millions. It is governed by our proprietary moderation system, EverGuard — an internal AI designed to ensure everything we build is safe, ethical, and human-first.

And we’re only just getting started!

Our Team

We are an enthusiastic, passionate and hardworking team of ≈ 75 people. Our founding team has strong entrepreneurial experience building and scaling web products from 0 to IPO.

Alexis Soulopoulos [CEO]

• 10+ years in Tech Executive Leadership

• Co-Founder Mad Paws Holdings (from 0 to IPO)

• Forbes 30 under 30 + Deloitte TechFast50 ’22 & ‘23

Michael Monin [Co-founder & CTO]

• 10+ years as CTO / COO (web2/web3), 1+ year in AI/LLM

• Serial-entrepreneur: MTK Digital (exited / 0->$20m revenue) and Zipchat (AI Chatbot for E-commerce brands)

Thomas Lacroix [Co-founder & CMO]

• 8+ years in Customer Acquisition & E-commerce Growth

• Serial-entrepreneur: Curatible (sold to Blackstone) and MTK Digital (exited / 0->$20m revenue)

Maruša Fasano [CFO/Legal]

• 25+ years in Finance, Strategy, M&A

• Ex-CFO/M&A at Curatible (exited to Blackstone)

• Ex-President of the Board at SotremoSA (exited)

• Co-founder/CFO at SoftOne (exited)

Your Role

Our tech team is expanding rapidly to keep pace with the ambitious feature roadmap we've set out. We are therefore hiring experienced Senior Software Engineers, to help us build and scale our product. You’ll have the opportunity to help define our roadmap and find the best technical solutions to help our customers. You will also have time to run some experiments and bring new ideas to the table.

Reporting directly to our Tech Lead, you will be responsible for:

• Interacting with the Product Manager to review project specs
• Preparing integration plans, break-downs, and estimations
• Hands-on code implementation, PRs, code reviews, testing, etc.

You'll be working with Michael (co-founder and CTO) along with the product team and the engineering team (web developers, SRE, data scientists).

What you will be working with

• Ruby, Ruby on Rails (latest)
• PostgreSQL, Redis
• Hotwire (Turbo & Stimulus)
• Tailwind CSS

Your Qualifications

Must-haves

💼 5+ years of experience:

• As a back-end or full-stack software engineer
• In tech scale-ups or any similarly agile and fast-paced environment
• On large-scale products where your code was used by thousands of monthly users

🗣 Strong communication & collaborative skills (perfectly fluent in English)

🧢 Ownership and commitment - we’re looking for owners, not renters

⚡️ Doer mindset - we are moving fast and we need people who can find the right balance between software craftsmanship and velocity

🫶🏻 User-centricity - you are proud of what you build and you share our obsession for amazing user experience

🍭 #NSFW - you are comfortable building products that are based on uncensored models and content

Bonus points

• Past experience and/or interest in data science and generative AI (NLP, ML, MLOps, etc.)
• Experience working with globally distributed teams

Why EverAI?

📈 Exponential Growth: From 50M users in 2 years, to 100M next — and 500M beyond

🚀 Track Record of Category-Creating Innovation: We consistently launch world-first AI applications — setting the pace, not following it

🌍 Global Impact: Top-tier user growth, real-world adoption, and cultural relevance

🧠 Proven Leadership: A senior team that’s launched, scaled, and exited & IPO’d multiple scale ups — now fully focused on reshaping AI companionship

👥 Elite Remote Team: 100% remote and built to win — world-class talent from Tier 1 tech companies, with a culture of ownership, velocity, and radical creativity

🛡️ Ethical Core: Our AI ecosystem is governed by EverGuard, our proprietary AI moderation technology, ensuring responsible development at scale

What We Offer

✍️ Contract Type: We prefer B2B, but we’re flexible, what matters is long-term commitment and impact
📍 Work From Anywhere: Fully remote. Choose the environment where you do your best work
🏝️ Paid Time Off: 4 weeks (20 working days) of PTO per year to recharge and reset
👨‍👩‍👧‍👦 Annual Gathering: A yearly in-person meetup to connect, brainstorm, and celebrate wins together
❤️‍🩹 Health & Wellness Support: Monthly allowance of 100 USD for health insurance expenses + unlimited 1:1 sessions with psychologists and lifestyle experts through OpenUp (also available for up to three family members)
🏢 Co-Working Space Budget: Work from a co-working space up to twice per month (35 EUR / 40 USD per visit) to stay inspired and connected
📚 Learning Budget: Dedicated funds to support your professional growth: courses, books, conferences, events, or certifications
💻 Equipment: Company laptop provided + monitor budget up to 250 USD for your workspace setup
⚡ AI Tools Access: Premium access to ChatGPT, Cursor, Hugging Face, and others, to power your ideas and workflows

🎯 Top Tier Talent Is Our Multiplier

We’re a fully remote group of A-players from Tier 1 tech, led by an exec team who’ve launched, scaled, and exited multiple companies. We move fast, and care deeply about what we build — and who we build it with.

We’re looking for exceptional talent ready to ship & distribute world-first AI products at scale, fast, and co-create with us this category-defining business.

If that’s you — reach out and apply!

Looking for a full-stack developer for a long-term project with an EdTech platform that has been operating for 15 years and has thousands of active users. 

The team is small: a tech lead, a frontend/payments developer, and a QA engineer. You will own tickets end to end - from reading to deploy - without hand-holding.

Stack: Ruby on Rails, Next.js, React, PostgreSQL, Nginx, Docker, Tailwind CSS, Render.

Requirements:

• 2-5 years of experience with Ruby on Rails and React/Next.js
• Experience deploying to managed PaaS platforms (Render, Vercel, Railway, or similar)
• AI-native workflow: you use Cursor, Claude, Copilot, or similar tools daily
• Strong async communication, clean PRs, questions before starting, not after shipping
• Russian or Ukrainian language for team communication

Conditions: remote, 30+ hrs/week, $25-40/hr, 6+ months with potential to go full-time.

Looking for a full-stack developer for a long-term project with an EdTech platform that has been operating for 15 years and has thousands of active users. 

The team is small: a tech lead, a frontend/payments developer, and a QA engineer. You will own tickets end to end - from reading to deploy - without hand-holding.

Stack: Ruby on Rails, Next.js, React, PostgreSQL, Nginx, Docker, Tailwind CSS, Render.

Requirements:

• 2-5 years of experience with Ruby on Rails and React/Next.js
• Experience deploying to managed PaaS platforms (Render, Vercel, Railway, or similar)
• AI-native workflow: you use Cursor, Claude, Copilot, or similar tools daily
• Strong async communication, clean PRs, questions before starting, not after shipping
• Russian or Ukrainian language for team communication

Conditions: remote, 30+ hrs/week, $25-40/hr, 6+ months with potential to go full-time.

Looking for a full-stack developer for a long-term project with an EdTech platform that has been operating for 15 years and has thousands of active users. 

The team is small: a tech lead, a frontend/payments developer, and a QA engineer. You will own tickets end to end - from reading to deploy - without hand-holding.

Stack: Ruby on Rails, Next.js, React, PostgreSQL, Nginx, Docker, Tailwind CSS, Render.

Requirements:

• 2-5 years of experience with Ruby on Rails and React/Next.js
• Experience deploying to managed PaaS platforms (Render, Vercel, Railway, or similar)
• AI-native workflow: you use Cursor, Claude, Copilot, or similar tools daily
• Strong async communication, clean PRs, questions before starting, not after shipping
• Russian or Ukrainian language for team communication

Conditions: remote, 30+ hrs/week, $25-40/hr, 6+ months with potential to go full-time.

About Us

Smirnov Labs is a fast-growing engineering company founded by an ex-Googler. We help product teams launch and scale quickly by leveraging modern technology and AI-assisted development.

Our projects are diverse — we partner with clients at the earliest stages and own the technical delivery end-to-end.

We're a small, senior-heavy team where every engineer has real impact. No bureaucracy, no hand-holding — just sharp people shipping fast.

What You'll Do
 

• Own features end-to-end: from architecture and implementation to deployment and support
• Build and ship web applications using Ruby on Rails
  Design and maintain APIs, services, and data layers (PostgreSQL, Redis, Sidekiq)
• Deploy and operate services on AWS with Docker
• Write clean, well-tested code with RSpec                                         
• Communicate with the CTO and client-side engineering team directly — no layers in between
• Use AI-assisted development tools (Claude, Cursor, GitHub Copilot) as part of your daily workflow
• Work across diverse projects — different domains, different challenges    

What We're Looking For
 

• 4+ years of professional backend or full-stack development experience
• Strong Ruby and Rails skills (Rails 6+)
• Solid hands-on experience building RESTful and/or GraphQL APIs
• Production experience with PostgreSQL, Redis, Sidekiq, AWS, Docker
• Familiarity with frontend basics (HTML, CSS, JavaScript) — enough to work with Hotwire/Turbo or integrate with a JS frontend
• Comfort working in US timezone (overlapping working hours required)
• Upper-Intermediate or higher English
• Ability to own and drive features independently with minimal supervision
• Go or TypeScript experience is a plus

What We Offer

• Competitive salary above market average
• Fully remote work
• Flat structure — work closely with the CTO, no middle management
• Diverse and technically challenging projects
• Modern AI-powered development workflow
• Small team culture — your voice matters, your code ships
• Paid vacation and sick leave
• Flexible schedule within US timezone overlap
• Professional and career growth through real ownership, not courses and certificates
   

How to Apply

Send your CV with a brief note about a project you're most proud of.

Two backend-focused Ruby developers (1x Senior, 1x Mid)

Location: any

Start: ASAP

Duration: long-term (with potential extension)

Engagement: Full-time

English: B2+

We are looking for two backend-focused developers (1x Senior, 1x Mid) to join a 4-5 month project ASAP (with high potential for long-term extension).

The mission:

Extending the existing API to support self-service features for a new recruitment/hr application.

Requirements:

- Strong Ruby on Rails expertise: Deep experience in scaling and expanding API endpoints.

- React Native (Bonus): Skills in RN are a huge plus and will allow for more flexible task distribution.

- Availability: Ready to start immediately.

Recruitment Process:

1) Introductory Call (15 min): A quick chat to put a face to the name and discuss the role.

2) Case Study: A technical task with specific requirements. 
Note: This takes approximately 8 hours and must be completed within a 9 AM – 5 PM window.

3) Technical Interview: A deep dive into the case study.

4) Culture Fit Interview: A final conversation with the company's CEO

Looking for a full-stack developer for a long-term project with an EdTech platform that has been operating for 15 years and has thousands of active users. 

The team is small: a tech lead, a frontend/payments developer, and a QA engineer. You will own tickets end to end - from reading to deploy - without hand-holding.

Stack: Ruby on Rails, Next.js, React, PostgreSQL, Nginx, Docker, Tailwind CSS, Render.

Requirements:

• 2-5 years of experience with Ruby on Rails and React/Next.js
• Experience deploying to managed PaaS platforms (Render, Vercel, Railway, or similar)
• AI-native workflow: you use Cursor, Claude, Copilot, or similar tools daily
• Strong async communication, clean PRs, questions before starting, not after shipping
• Russian or Ukrainian language for team communication

Conditions: remote, 30+ hrs/week, $25-40/hr, 6+ months with potential to go full-time.

Looking for a full-stack developer for a long-term project with an EdTech platform that has been operating for 15 years and has thousands of active users. 

The team is small: a tech lead, a frontend/payments developer, and a QA engineer. You will own tickets end to end - from reading to deploy - without hand-holding.

Stack: Ruby on Rails, Next.js, React, PostgreSQL, Nginx, Docker, Tailwind CSS, Render.

Requirements:

• 2-5 years of experience with Ruby on Rails and React/Next.js
• Experience deploying to managed PaaS platforms (Render, Vercel, Railway, or similar)
• AI-native workflow: you use Cursor, Claude, Copilot, or similar tools daily
• Strong async communication, clean PRs, questions before starting, not after shipping
• Russian or Ukrainian language for team communication

Conditions: remote, 30+ hrs/week, $25-40/hr, 6+ months with potential to go full-time.

Looking for a full-stack developer for a long-term project with an EdTech platform that has been operating for 15 years and has thousands of active users. 

The team is small: a tech lead, a frontend/payments developer, and a QA engineer. You will own tickets end to end - from reading to deploy - without hand-holding.

Stack: Ruby on Rails, Next.js, React, PostgreSQL, Nginx, Docker, Tailwind CSS, Render.

Requirements:

• 2-5 years of experience with Ruby on Rails and React/Next.js
• Experience deploying to managed PaaS platforms (Render, Vercel, Railway, or similar)
• AI-native workflow: you use Cursor, Claude, Copilot, or similar tools daily
• Strong async communication, clean PRs, questions before starting, not after shipping
• Russian or Ukrainian language for team communication

Conditions: remote, 30+ hrs/week, $25-40/hr, 6+ months with potential to go full-time.