JavaScript / TypeScript Developer

We’re looking for a highly skilled JavaScript / TypeScript Developer to join our team across several long term, strategically important projects. One of the core initiatives involves architecting and implementing the business logic behind cryptocurrency purchasing within an online banking environment. In this role, you’ll work hands on with a cloud native AWS microservice architecture, building secure, highly scalable systems that serve thousands of users.

As a senior TypeScript Developer / Engineer, you’ll drive key technical decisions, influence system design, and ensure best practices in distributed systems, performance, and security. You’ll collaborate closely with other senior experts across backend, cloud, and security domains to build robust financial services in a regulated and mission critical environment.

Join us if you want to shape modern infrastructure, work with complex technical challenges, and contribute to solutions trusted by a large customer base.

• Build and evolve backend services using JavaScript, TypeScript, Node.js delivering clean, testable, and maintainable code.
• Design, architect, and implement microservices in a scalable, distributed environment.
• Drive development of core business logic for crypto purchasing workflows in online banking.
• Integrate with internal banking systems and external crypto providers, ensuring smooth and secure data flows.
• Work hands-on with AWS services such as Lambda, DynamoDB, SQS, API Gateway, and more.
• Uphold top-tier security, reliability, and compliance standards in a regulated financial environment.
• Actively participate in code reviews, architecture sessions, and technical decision-making.
• Collaborate closely with other technical colleagues and product teams to deliver high-quality features.
• Continuously optimize services for performance, scalability, and operational excellence

Tech stack:

•     JavaScript, TypeScript, Node.js
•     Architecture: Microservices
•     Cloud: AWS (Lambda, ECS/Fargate, DynamoDB, SQS, SNS, API Gateway, CloudWatch)
•     CI/CD: AWS CodePipeline, GitHub Actions (or similar)
•     Other: REST APIs, Kafka, event-driven communication

What’s in for you

•    Long-term involvement in a modern, meaningful product used by thousands.
•    Strong engineering culture where your technical voice matters.
•    Opportunity to work with cloud-native tech and modern architecture.
•    Flexibility, autonomy, and a team that supports your ideas.
•    An opportunity to build high-impact features that shape the future of digital banking.

• Strong hands-on experience with JavaScript, TypeScript and Node.js.
• Proven track record architecting and building microservice-based systems.
• Solid understanding of cloud services and cloud-native patterns (AWS, Azure, or GCP).
• Experience creating secure, resilient, and scalable backend solutions.
• Familiarity with distributed systems, queues, and asynchronous communication.
• Experience in financial services or crypto is a plus (but not mandatory).
• Comfort working in an agile environment.
• A proactive mindset, someone who takes ownership and drives solutions.
• Strong communication and interpersonal skills, attention to detail and client-focused approach.
• Proficiency in Czech or Slovak at communicative, or native level is essential.
• Knowledge of English at B2 level or higher. 

• Customized working hours: Flexible scheduling tailored to your individual needs.
• Vacation and time off: Guaranteed 5 weeks of vacation and 3 sick days.
• Flexible work environment: Ability to work from home, company offices, or directly at client sites.
• Education: Training, conference attendance, e-learning programs, and language courses.
• On-site refreshments: Diverse selections including cookies, fruit, coffee, and hot chocolate.
• Seamless mobile communication: 50 GB of mobile data + unlimited company-paid calling. Discounted O2 Family tariffs for family members.
• Choice of benefits: MultiSport card, pension insurance contribution, discounts (Alza, pharmacies, tickets, and other experiences).
• Additional employee perks: Access to employee loans, discounts with business partners, opportunities for volunteer work, and participation in team-building activities.