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Billennium

Fullstack Developer

Billennium
Poland · Full-time · Mid-Senior

We are hiring an experienced Fullstack Developer for our client in the fintech industry.


Key Requirements:


Frontend

  • Angular (web application)
  • Ionic (mobile wrapper, monorepo shared with existing bank apps)
  • Mature design system with page templates and reusable components
  • Creative/experimental UI direction — intentionally breaking standard spacing and colour conventions (think social media aesthetics, not traditional banking)


Backend

  • Microservice/middleware architecture (~1,200 services)
  • Primary stack: Java / Kotlin, mostly Spring Boot
  • Strong platform engineering teams managing build tooling and pipelines


AI / Conversational

  • Existing chatbot with single-turn LLM calls (multi-turn in development)
  • Agentic framework: pilot project for Codex integration
  • Applied AI / agentic layer being built on top of an internal AI platform
  • Conversational squad will both consume and contribute to the AI platform


Cloud & Infrastructure

  • Multi-cloud strategy, with AWS as the preferred provider
  • Cloud layer abstracted from developers via platform engineering


Other Capabilities in Scope

  • PFM (Personal Finance Management) — budgeting, expense tracking; vendor selection underway for expanded capabilities
  • Shared Finance — shared wallet, joint account management, expense splitting, budgeting for shared accounts


Perks and benefits:

  • Comprehensive benefits - enjoy Udemy for Business, private medical care, Multisport card, veterinary package, language lessons, and shopping vouchers.
  • Flexibility - adaptable working hours and remote/hybrid work options to suit your lifestyle & location.
  • Career growth - access opportunities for professional development and learning, including perks related to our official partnerships with global IT giants: Microsoft, AWS, Snowflake, Salesforce & more.
  • Global collaboration - work with a diverse, international team.
  • Innovative environment - be part of a forward-thinking and growth-oriented workplace.
  • Engaging community – Work with passionate professionals and participate in team-building events, hackathons, and CSR initiatives to make an impact beyond work.
  • Team-building events including our company tradition (annual company event in Mazury).
  • A pleasant surprise to start your journey with us in the form of a welcome pack.


Recruitment process:

  • HR call
  • Technical Interview
  • Interview with the dedicated Client
  • Final decision/ Feedback


Sounds interesting? Click "Apply" and have a chance to hear more!

Key Skills

Ranked by relevance

ai salesforce aws ui
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Posted
Jul 02, 2026
Type
Full-time
Level
Mid-Senior
Location
Poland
Company
Billennium

Industries

IT Services IT Consulting

Categories

Information Technology

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