Senior Frontend Software Engineer

About Wakacje.pl

We are an organization that has been fulfilling the travel dreams of Poles for 25 years. Wakacje.pl is the largest e-commerce platform in Poland and a network of travel agencies offering a wide range of travel products. Since 2015, we have been part of Wirtualna Polska Holding – the largest Polish group of media and e-commerce companies. At Wakacje.pl, we offer thousands of domestic and international trips, as well as travel insurance, airport parking, and holiday vouchers. We constantly expand our offer to best meet our customers' needs. If you approach life with #ENERGY, value #HONESTY AND OPENNESS, focus on #CUSTOMER UNDERSTANDING and #COLLABORATION at work, carry out your tasks with high #EFFICIENCY and #RESPONSIBILITY, and want to play a key role in making us #INNOVATIVE – join us! 

About the role:

For this role, we are looking for a frontend developer who combines strong ownership with high collaboration skills.

• Adaptability and Flexibility
• Strong Collaboration with Business Stakeholders
• 3Analytical and Data-Driven Mindset
• Log Analysis and Debugging Skills
• Ownership and Accountability
• Quality and Performance Focus
• Team-Oriented with Positive Energy

Overall, we are looking for someone who is open-minded, analytical, communicative, and business-aware, with strong ownership and a proactive approach to solving problems in a mission-critical product area.

Job description

Key responsibilities:

• Designing, implementing, and maintaining functionality of JavaScript/TypeScript-based applications used by internal and external clients.
• Ensuring the codebase is clean, maintainable, scalable, and aligned with engineering best practices.
• Monitoring application health using technical and business metrics (e.g., Grafana dashboards) and reacting to anomalies or incidents.
• Optimizing existing solutions, improving performance, and ensuring reliability of critical system flows such as listing.
• Collaborating closely with business stakeholders and product teams to translate requirements into technical solutions and continuously improve the product.
• Working with databases to analyze data, debug issues, and ensure correct data flow between services.
• Proposing and implementing new ideas, selecting appropriate technologies, and contributing to architectural decisions.
• Creating and maintaining unit and integration tests to ensure stability and long-term maintainability of the system.

 

Requirements

Requirements:

• Strong knowledge of JavaScript / TypeScript and modern backend architecture (REST, middleware, validation, auth)
• Experience in: React, Next.js, Node.js
• Experience with API integrations (payments, CRM, external services) and handling edge cases
• Practical experience with logging, monitoring, and debugging in production environments
• Understanding of performance optimization and scalability in high-traffic transactional systems
• English: min. B2 (technical)
• Polish: native
• Nice to have:
• Familiarity with Redis (caching, session handling, rate limiting)
• Experience with Server-Sent Events (SSE) or real-time communication patterns
• Knowledge of system observability tools (e.g., Grafana, ELK stack)
• Experience in e-commerce systems with conversion and efficiency focused optimization

We offer

What do we offer:

Workplace safety and comfort:

• Employment based on an employment contract or B2B,
• Full support during the onboarding period under the supervision of an engaging leader/buddy.

Business agency and agility:

• Real influence on business decisions, the ability to take initiatives and implement your ideas.

Development within the organization:

• Individual Development Plan,
• Participation in training courses and conferences to enhance professional competencies. 

All-inclusive for Employees:

• A benefits package that you can use according to your preferences – Lux Med medical care, Health and Life Insurance (PZU and Warta), Multisport card, shopping and lunch vouchers, and many other cafeteria offers available on the Worksmile platform,  
• Study Tour – trips abroad to explore our product offerings (destination tours and hotel audits),
• A training and webinar package supporting professional and personal development,
• Discounts on our products for employees and their families,
• Possible to work from one of our office in Gdańsk (Alchemia office complex), Wrocław (Legnicka Business Garden), Warsaw (Włochy Business Garden) or remote. 
• Casual dress code.

Ready to join the team with a #travelmindset? We’re waiting for you!