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Senior FullStack Engineer

Location:
Remote
Level:
Senior
English:
Project stage:

The system has an old codebase (over 10 years old), and several teams have worked on it throughout its history. Ruby part is implemented using outdated Ruby version. We have conducted initial discovery to understand the scope of work.

Project Overview

We are looking for a FullStack Engineer to join our team and help modernize an existing system. Your mission will be to enhance the current system, improving scalability and maintainability. A key aspect of the project will involve understanding and working with the existing logic, which will require reverse engineering and translating it into a more scalable, modern language. This process is essential to enable product development and support the business as it scales.

Project overview:

The project goal is to modernize the existing supplier-side platform (SSP) thus enabling further application development. This platform provides the ability to integrate Ad Demand Partners (those who want to show ads) and allow Ad Inventory Suppliers (website and app owners) to sell advertising space in an efficient manner via real-time auctions, maximizing revenue for Supply and clicks for Demand.

Technical Details:

Stack: Legacy: Ruby 2.1.3, Rails 3.2.17, Scala, JavaScript, jQuery.
Reverse engineering is expected in Python or Node.js.

The system is based on a microservices architecture hosted on AWS.

If functionality needs to be rewritten, the developer will choose the technology to use.

Job Highlights:
  • The role is technically challenging, requiring strong troubleshooting skills
  • This position is ideal for those who enjoy troubleshooting and engaging in reverse engineering
  • Direct communication with the client
  • There will be opportunities to enhance skills in AWS, as some system features are expected to be developed from scratch using AWS services
Team Composition:

1 Software Engineer (the one we are looking for), DevOps, QA, DM.

The engineer will work independently on the project and make technical decisions autonomously, including proposing solutions to technical and business challenges. Colleagues will be available for consultation as needed.

Responsibilities
  • Implementing and optimizing backend services
  • Reverse engineering and modernizing legacy codebase in a new language (Python or Node.js)
  • Ensuring system scalability and performance improvements
  • Analyzing business problems, identifying, proposing the best solutions, and translating business needs into technical requirements
  • Developing technical designs for new features
Qualifications
  • 5+ years of software development experience
  • Experience with Python or Node.js
  • Willingness to work with Ruby, Scala, JS, and AWS
  • Strong knowledge of microservices architecture
  • Proficient in troubleshooting and problem-solving
  • Familiarity with CI/CD processes is a plus
  • Ability to work independently and make informed decisions
  • At least an Intermediate level of English
Workflow

Our Benefits

Work & Life Balance

20 paid working days off
Soulful corporate events and team buildings
Opportunity to work remotely

Work Environment

All the necessary equipment
A comfortable and modern office
Accounting services
Relocation reimbursement

Health & Wellness

Health insurance
$600 extra for the health care, sports or mental health
10 working days of sick leave

Professional Development

$600/year you can spend on:
Courses, trainings, seminars
Improvement of qualification/ certification
English lessons

[ our values/ ]

What Keeps Us Sharp and Steady

We cut the fluff and keep it real—owning our work, refining our craft, and always leveling up. No excuses, just a team that’s in it together, pushing boundaries and delivering results.
Pragmatic

Pragmatic

Theory’s cute, but results pay the bills. Perfect’s a fairy tale—done right is what counts.
Adult

Adult

No drama, no sugarcoating. We own our wins and our screw-ups, and treat failure like free tuition.
Craftspeople

Craftspeople

We’re not assembly-line coders. We build, we refine, and we don’t put a fresh coat of paint on bad code.
Forever Learners

Forever Learners

Falling behind? We leave that to others. Leveling up fast, chasing down answers, and never settling for “I don’t know.”
Great Allies

Great Allies

No lone wolves here. We listen before we talk, communicate like grown-ups, and make the ride better for everyone.

[ global team, remote freedom/ ]

Headquartered in the USA and Ukraine, but our team? We're everywhere.

We’re fully remote, so you can work wherever you’re most productive.
Costa Rica
Team Hub
USA
Strategic & Office & Team Hub
Spain
Strategic & Team Hub
Poland
Strategic & Team Hub
Romania
Team Hub
Ukraine
Office & Team Hub
Costa Rica
Bulgaria
Team Hub
Georgia
Team Hub
Armenia
Team Hub
Lviv
Mykoly Voronoho Street, 3, Lviv, Ukraine, 79000
anastasia.boyko@mev.com
Cherkasy
Pushkina Street, 100, Cherkasy, Ukraine, 18000
vladyslava.korol@mev.com
Walnut Creek
1212 Broadway Plaza, Walnut Creek, California, USA
solutions@mev.com

FAQs

Got questions? No worries, we've got all your answers covered in our FAQ!

Absolutely! We offer flexible remote work options, so you can work from anywhere worldwide. Prefer the office vibe? We’ve got a modern, comfy workspace in Ukraine, fully equipped with everything you need.

We have a structured onboarding process to make your transition smooth and welcoming. You’ll have access to mentors, detailed resources, and a supportive team to help you hit the ground running.

We conduct performance reviews every six months to assess your achievements, align your goals with the company’s vision, and identify growth opportunities. During these reviews, you’ll:

  • Get a clear picture of your strengths and areas to improve
  • Receive feedback on your performance and productivity
  • Set goals that align with your career path and the company’s strategy

At MEV, we’re all about continuous learning and growth. Here’s what a typical path looks like for a Software Engineer:

  • Junior Engineer: Build foundational skills like bug fixing and documentation with guidance from senior team members.
  • Mid-level Engineer: Take on more complex tasks, mentor junior engineers, and play a bigger role in problem-solving and code optimization.
  • Senior Engineer: Lead projects, tackle high-level technical challenges, and align technical work with business goals. You’ll also mentor others and drive innovation within the team.
  • Staff Engineer: Lead large-scale projects, design system-wide architectures, and manage multi-team efforts. You’ll mentor senior engineers and steer the technical strategy.

At every step, your responsibilities grow—and so does your impact. Regular reviews and professional development opportunities keep you moving forward.

We believe in open, transparent communication and a collaborative culture. Regular team meetings, project updates, and social events keep everyone connected and engaged.

We’re big on balance. Here’s what we offer:

  • 20 paid vacation days per year
  • 10 sick days
  • Flexible working hours

Your well-being matters to us. We offer:

  • Comprehensive health insurance
  • $600 annually for healthcare, sports, or mental health support

We invest in your growth. You’ll get $600 annually to spend on:

  • Courses, trainings, and seminars
  • Professional certifications
  • English lessons

Our culture is built on mutual respect, continuous learning, and a passion for innovation. We value diversity, creativity, and a good sense of humor. We’re a team of professionals who support each other, celebrate successes, and challenge ourselves to grow.

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