Senior Full Stack Engineer for Relay

About the Position

Senior Full Stack Engineer for Relay

Blackbird Lab is a software development company. While we are practicing an international working culture, we are proud representatives of Ukrainian values and traditions. We are a team of 90+ energetic, curious, smart, and open to new challenges tech pros who prefer efficient async communication, flexible working hours, and a co-working office model.

Being in this craft for 7+ years, we managed to accumulate expertise and bring value to a number of clients. We cooperate with US and Canadian product companies of different sizes, from small startups to established products, in close, trusted relationships.

As part of the Blackbird team, you will be responsible for building internal tools and improving the developer experience for an existing React application. The app is already used by 50,000+ users across Canada.

Our client is a fast-growing Canadian fintech company that builds an online business banking and cash-flow management platform designed to help small and growing businesses better manage their finances. The company’s mission is to provide business owners with clear visibility into earnings, expenses, and savings so they can operate more efficiently and make smarter financial decisions.

Responsibilities

• Develop and maintain the platform that enables other development teams to build new features.
• Manage the integration of features contributed by other teams into the main project.
• Oversee and execute release processes to ensure smooth delivery of updates.

Requirements

• 5+ years of development experience with React.
• Strong knowledge of JavaScript/TypeScript, ES6+ features.
• Hands-on experience with AI Coding agents like Claude, Codex, Cursor.
• Practical experience with CI/CD pipelines, automated testing.
• Upper-Intermediate English speaking level.
• Fluent in Ukrainian.

Team Setup & Processes

• Engineering Manager (Ukraine)
• Senior Full Stack Engineer (Poland)
• Middle Full Stack Engineer - open position

Interview Process

• HR interview (30 min)
• Interview with an Engineering Manager (30 min)
• Tech interview (60 min)

We Offer

We are all for the self-development of each team member. As a part of our team, you’ll be supported in your professional growth, work on Macs, receive certifications, and visit conferences. On top of that, you will enjoy an attractive social package, including:

• Competitive monthly compensation
• Flexible working schedule
• Working remotely
• 18 paid vacation working days
• Paid sick leave (with 5 undocumented days per year)
• Health support with medical insurance or sports programs
• English lessons, sports activities, and charity events
• Full support of Private Entrepreneur reporting services (ФОП)

About the Company

Blackbird Lab

Blackbird Lab is a software development company. While we are practicing international working culture, we are proud representatives of Ukrainian values and traditions. We are a team of 90+ energetic, curious, smart, and open to new challenges tech pros who prefer efficient async communication, flexible working hours, and a co-working office model.

Being in this craft for more than 8 years, we managed to accumulate expertise and bring value to a number of clients. We cooperate with US and Canadian product companies of different sizes, from small startups to established products, in close, trusted relationships.

Founded in 2018, Blackbird Lab continues to grow and innovate, providing high-quality software solutions to our clients.