Senior Full Stack Engineer (Ruby on Rails)
Confirmed on the employer's own hiring board on Oct 28, 2026. First seen by Alion on Oct 25, 2026.
Job Title: Senior Full Stack Engineer (Ruby on Rails)
Employment Type: Full-time | Permanent | Remote
Location: We welcome applications from candidates across Bulgaria for this fully remote role.Please note that you will need to have the right to work in the Bulgaria, as we are currently unable to offer visa sponsorship.
WE ARE ZIGZAG - THE WORLD’S MOST CONNECTED POST-PURCHASE AND RETURNS NETWORK
We are an award-winning eCommerce returns and post purchase specialist, founded in 2015.
With over250 team members across the UK, Bulgaria, France, Portugal, Germany, and Spain, we are continually innovating the after-checkout experience for our retailers by reducing cost and complexity, driving sustainability, and fostering customer loyalty.
Today, our SaaS platform provides access to over 3,000 carrier lanes across 170 countries, supporting more 1,100 retailers including our leading enterprise and logistics clients The Very Group, New Look, Boden, Selfridges, Sports Direct, The Hut Group, Swarovski, L’Occitane, Photobox, Carrefour, Lands’ End and DHL.
We were the experts in returns. Now we are the experts in the whole post-purchase experience!
Discover more: https://www.zigzag.global/about-us
OUR CULTURE AND VALUES
Our culture is built on three core values, Start-up Spirit, Human Heart, and a Grown-up Mindset which guide how we collaborate and make decisions.
It isn’t something written on posters - it’s something we bring to life every day through our actions, our relationships, and how we show up for each other and our customers.
Everyone plays a role in shaping our culture through how we communicate, support one another, and celebrate success. Being a ZigZagger means taking ownership, bringing curiosity and energy to everything you do, showing resilience when challenges arise, and leading with care by putting “we before me.” You’ll use sound judgment, stay open to new perspectives, and continuously look for ways to learn, grow, and improve.
About the Role
We are looking for a Senior Full Stack Engineer with strong Ruby on Rails experience who thrives in solving complex technical challenges, delivering high-quality solutions, and sharing knowledge with the wider engineering team. You'll have the opportunity to work on a modern, scalable platform, solve complex technical challenges, and play a key role in delivering high-quality products.
You will work closely with Product Managers, Designers, and Engineers to build, maintain, and improve applications that deliver real value to our customers. As part of a collaborative engineering team, you will contribute to feature development, system improvements, and technical problem-solving while continuing to grow your skills and expertise.
Our Technology Stack
- Ruby on Rails
- Go
- TypeScript
- React
- Redux
- PostgreSQL
- Elasticsearch
- RabbitMQ
- Redis
- Google Cloud Platform (GCP)
- Kubernetes
- Docker
- Datadog
- Sentry
Key Responsibilities
- Develop, maintain, and enhance Ruby on Rails applications and backend services.
- Build and maintain APIs and integrations with internal and external systems.
- Write clean, maintainable, and well-tested code.
- Collaborate with Product, Design, and Engineering teams to deliver new features and improvements.
- Participate in code reviews and technical discussions.
- Troubleshoot and resolve bugs and production issues.
- Support application performance, reliability, and scalability improvements.
- Contribute to testing, deployment, and continuous integration processes.
- Document technical solutions and share knowledge with the wider team.
- Continuously develop your technical skills and stay current with industry best practices.
What We're Looking For
- Extensive commercial experience developing and maintaining scalable applications using Ruby on Rails in a senior engineering capacity.
- Good understanding of object-oriented programming and software engineering principles.
- Strong commercial experience with React and TypeScript, with the ability to build and maintain modern, scalable user interfaces and contribute across the full application stack.
- Exposure to cloud platforms such as GCP, AWS, or Azure.
- Experience building and consuming RESTful APIs.
- Experience working with relational databases, ideally PostgreSQL.
- Strong knowledge of automated testing, CI/CD pipelines, and engineering best practices to ensure the delivery of reliable, high-quality software.
- Experience using Git and collaborating within an Agile development environment.
- Strong problem-solving and debugging skills.
- Excellent communication and collaboration skills, with the ability to work effectively across cross-functional teams and technical stakeholders.
- Proven ability to take ownership of complex technical challenges, breaking down problems and delivering scalable, maintainable solutions.
- Fluent English communication skills.
Desirable Skills & Experience
- Knowledge of Docker and containerised applications.
- Familiarity with RabbitMQ, Redis, or Elasticsearch.
- Experience working within SaaS, e-commerce, or technology-focused businesses.
What We Offer
- 20 days’ annual leave plus public holidays, with additional holiday entitlement awarded for each completed year of service (up to a maximum of six extra days). Plus, to celebrate you, enjoy an extra day off on your birthday.
- Collaborative working environment
- Remote working with optional access to our Varna office for those who enjoy a hybrid working environment
- Healthcare insurance with dental service included
- Food vouchers ( €102.26 month per person)
Explore our full range of benefits here: ZigZag Bulgaria Social Benefits.pdf
If you are interested, please send your CV in English.
Equity, Inclusion & Transparency
In line with the EU Pay Transparency Directive, we are committed to transparency and will share the salary range for this role prior to the interview stage.
A diverse and inclusive workplace where everyone feels a sense of belonging is a priority, and applications are welcomed from people of all backgrounds and experiences. Reflecting how we live our own values of meritocracy over hierarchy, even if not every requirement is met, interest in the role is encouraged.
Hiring focuses on people as well as skills-if this opportunity resonates, you’re encouraged to apply and bring your unique perspective.