Senior Software Developer (FE React)

abcfinancial; Polska; On-site; PLN 150,000 - 210,000; Full time

Job summary

ABC Fitness is seeking an experienced Front-end Engineer to build the XLerate CRM experiences using React and collaborate with design, product, and engineering teams. You will own complex UI features end-to-end, ensuring performance and accessibility while contributing to data-driven enhancements.

You'll work closely with architecture and QA to ship features in a fast-paced Agile environment, leveraging modern tooling and CI/CD pipelines.

Qualifications

• Bachelor's degree in Computer Science or a relevant field is preferred.
• 4+ years of experience with JavaScript/TypeScript in production code.
• 4+ years of front-end experience using React for web apps.
• Strong understanding of React design principles, component-driven UI and state management.
• Proven track record delivering end-to-end features with ownership.
• Experience writing unit and integration tests and with CI/CD workflows.
• Experience integrating front ends with REST APIs and debugging across the stack.
• Mentoring engineers and raising code quality through reviews.
• Awareness of performance and accessibility best practices in production apps.

Responsibilities

• Design, develop, test, and document front-end software for XLerate web experiences using React.
• Collaborate with a customer team to understand needs and deliver impactful solutions.
• Own complex UI features end-to-end from design to release and production support.
• Drive front-end technical decisions and break work into deliverable slices.
• Work with developers and QA to design, test, and release new features.
• Mentor mid-level engineers through code reviews and pairing.
• Engage in data-driven decision making and continuous improvement retrospectives.
• Collaborate with designers, product managers, and testers to create human-centered experiences.
• Participate in Agile & Lean processes with DevOps and CI/CD.

Skills

JavaScript/TypeScript

React

Front-end development

Agile/Lean/CD

Education

Bachelor's degree in Computer Science or relevant field

Tools

AWS

REST APIs

Git / Version control

Job description

About ABC Fitness

ABC Fitness is the #1 software provider for fitness businesses of any size, all around the world. Supporting 30K clubs, 650K coaches, 40M members, and processing more than $12B in payments every year, ABC Fitness provides scalable, data-driven solutions to simplify club management and engage members and clients.

From personal trainers, boutique studios, and gyms, to international franchise health clubs, ABC Fitness will move your business forward through technology and industry insights. Innovation is at the center of everything we do, across ABC Glofox, ABC Ignite, ABC Trainerize, and ABC Evo. Let's make your fitness vision a seamless reality, together. Learn more at abcfitness.com

Join ABC Fitness and become part of a culture that's as ambitious as it is authentic. Let's transform the future of fitness-together!

Our Values

Best Life

We believe great work begins with great people. That's why our culture is built on respect, trust, and belonging. We create an inclusive environment where every team member can bring their authentic self to work-because diverse perspectives drive innovation and meaningful impact.

Growth Mindset

We are doers, thinkers, and dreamers. At ABC Fitness, your growth is our investment. Through continuous learning, mentorship, and professional development opportunities, we empower you to reach new heights-personally and professionally.

One Team

From day one, you'll be part of a team that collaborates, celebrates, and cares. We move fast, support one another, and have fun along the way. Because when you thrive, we all thrive.

You’ll join CRM Ops, the engineering squad that owns CRM operations and segmentation on the ABC Glofox platform - including tags, audiences, tasks, and Member Aggregate, our segmentation engine. The team connects member and studio data to day-to-day CRM workflows so studios can reach the right people and turn engagement into measurable outcomes.

You’ll shape the XLerate experience in the product UI, partnering closely with design and product so studios get clear, fast workflows for CRM day-to-day. We believe the team is the unit of delivery. Quality is a collective effort through reviews and pairing on complex challenges.

You’ll also work closely with partner squads such as Connect, which powers automations and communications alongside CRM, to continue building XLerate, our next-generation CRM product and a major priority for ABC Fitness.

WHAT YOU'LL DO

• Design, develop, test, and document front-end software for XLerate web experiences using React
• Work closely with a focused customer team to solve real problems, actively listening to customer needs and delivering impactful solutions
• Own complex UI features end-to-end, from design collaboration through release, and help raise the front-end quality bar
• Drive technical decisions on the front end, breaking large pieces of work into deliverable slices and flagging risk early
• Collaborate with developers and QA Engineers to design, develop, test and release new features
• Maintain code quality, organization, and automation; mentor Mid engineers through reviews and pairing
• Be involved in a data-driven decision-making process, from understanding the "why" behind our work to learning from retrospectives that guide continuous improvement
• Collaborate with designers, developers, product managers, and testers to transform ideas into unique, human experiences for fitness entrepreneurs
• Use cutting edge Agile & Lean ways of working underpinned by DevOps and CI/CD

WHAT YOU'LL NEED

• Bachelor's degree in Computer Science or relevant field exp. preferred
• 4+ years of experience with a general-purpose programming language like JavaScript/TypeScript, including solid TypeScript in production codebases
• 4+ years of experience with front end (using React), working on web applications
• Strong understanding of React design principles, component-driven UI, and state management in larger applications
• Proven track record owning complex features end-to-end, from technical design through release and production support
• Experience writing and maintaining automated tests (unit and integration) alongside modern Quality and Testing principles
• Experience integrating front ends with REST APIs and debugging issues across the stack
• Experience mentoring engineers and raising standards through code review
• Attention to performance and accessibility in production web applications
• Solid understanding of the practical application of agile development methods in an Agile/Lean/Continuous Delivery environment
• Strong written and verbal communication
• Knowledge of code versioning tools
• Comfortable learning new technologies and systems

AND IT'S GREAT TO HAVE

• Experience contributing to or maintaining a design system or shared component library
• React Native understanding
• Experience with Angular
• Experience with AWS
• Knowledge of tooling around continuous deployment
• Experience building complex CRM or B2B SaaS workflows

Compensation for this role will be