Posted at: 23 April

Senior Fullstack Developer (for our partner group)

Company

CompanyFYST

FYST is a global fintech B2B SaaS company specializing in comprehensive payment gateway solutions for e-commerce and regulated industries.

Remote Hiring Policy:

FYST embraces a flexible remote work culture, allowing team members to work from various locations, with roles that may include hybrid options. The company values diversity, with team members from over 20 countries, and encourages collaboration across time zones.

Job Type

Full-time

Allowed Applicant Locations

Europe

Salary

$80,000 to $120,000 per year

Apply Here

Job Description

WHAT YOU'LL BE WORKING ON

  • Backend (Kotlin): Financial core: ledger, settlement, payouts, pricing, reserves
  • Integrations: payment providers, KYC/KYB, banking (SEPA/SWIFT)
  • Webhooks & event-driven processing
  • REST APIs for product and internal tools
  • BPMN workflows (Camunda): onboarding, AML, disputes, settlements
  • Compliance flows: transaction monitoring, SAR
  • Frontend (Next.js): Merchant portal (transactions, payouts, dashboards, onboarding)
  • Internal ops/admin tools (AML, disputes, treasury, compliance)
  • Developer portal (API docs, sandbox, integration guides)
  • Reconciliation across multiple systems (gateway → processor → bank)
  • Reporting: regulatory, scheme, financial
  • Fully automated testing (unit / integration / e2e, no manual QA). 
 

OUR TECH STACK

  • Backend: Kotlin, Spring Boot 3, Spring Modulith
  • Frontend: Next.js 15, TypeScript, shadcn/ui, Tailwind CSS
  • Database: PostgreSQL 18 (RDS, pgvector, JSONB, FTS)
  • BPMS: Camunda 8 (Zeebe, BPMN, DMN)
  • Auth: Okta
  • Infra: AWS, EKS, Docker, GitLab CI/CD


WHAT YOU NEED TO SUCCEED IN THIS ROLE

  • At least 4-5 years of experience with Java/Kotlin (Spring Boot)
  • Solid experience building REST APIs and backend systems
  • Hands-on experience with React / Next.js and TypeScript
  • Strong knowledge of PostgreSQL (queries, indexing, migrations)
  • Understanding of event-driven architecture, webhooks, async processing
  • Experience with API design (versioning, idempotency, error handling)
  • Experience with CI/CD and Git workflows
  • Full-stack mindset (not backend-only)
  • Ability to work with system design and architecture decisions
  • Proactive approach and ownership (doesn’t wait for tasks, drives solutions)
  • Testing ownership
  • AI fluency: actively using AI tools in daily engineering work (not just basic usage)
  • Comfortable in a fast-paced startup environment, actively contributing ideas and driving solutions end-to-end rather than just executing tasks
  • Good English level (at least A2-B1) and fluent russian 

WHAT WE OFFER

  • Remote work (EU timezone or close to it) 
  • Competitive compensation above typical market benchmarks for similar roles
  • Direct collaboration with CTO and CPO
  • Fintech domain: card payments, compliance, settlement - deep immersion
  • Paid vacation and sick leave
  • Company-provided equipment (Apple devices)
  • Small, highly engaged team with strong ownership
  • Real opportunity to influence product decisions and bring your ideas to life
  • Fast-paced environment with minimal bureaucracy
Apply Here