Senior Fullstack Developer (for our partner group)

Talantir; Netherlands; Remote; EUR 70,000 - 110,000; Full time

Benefits offered by this job

Remote work (EU timezone)

Competitive compensation

Direct collaboration with CTO and CPO

Apple devices provided

Small, highly engaged team

Opportunity to influence product

Fast-paced environment

Vacation and sick leave

Job summary

Talantir in the Netherlands is seeking a skilled backend engineer with Kotlin/Java and strong React/Next.js experience. You will build the financial core (ledger, settlements, payouts, pricing) and integrate with payment providers, KYC/AML, and banking networks, delivering robust REST APIs and event-driven processing.

Join a fast-paced fintech team, own architectural decisions, work with the CTO and CPO, and contribute to reporting, compliance, and developer tooling in a fully remote-friendly

Qualifications

• 4–5 years of experience with Java/Kotlin (Spring Boot).
• Experience building REST APIs and backend systems.
• Proficient with React/Next.js and TypeScript.
• Strong knowledge of PostgreSQL and SQL queries.
• Understanding of event-driven architecture and webhooks.
• Experience with API design (versioning, idempotency, error handling).
• Experience with CI/CD and Git workflows.
• Full-stack mindset with ability to contribute to system design.
• Testing ownership across code, tests, and deployments.

Responsibilities

• Backend development in Kotlin including ledger, settlement, and payouts.
• Integrations with payment providers and KYC/KYB.
• Develop webhooks and event-driven processing.
• Create REST APIs for product and internal tools.
• Model BPMN workflows for onboarding, AML, disputes.
• Frontend work with Next.js/TypeScript for merchant portal.
• Build internal ops/admin tools.
• Develop developer portal with API docs and sandbox.
• Reconcile across gateway, processor, and banks.
• Produce regulatory and financial reporting.
• Maintain fully automated tests.

Skills

Java/Kotlin

REST APIs

React/Next.js

PostgreSQL

Event-driven

API design

CI/CD

Full-stack

System design

Testing ownership

AI tools

English & Russian

Tools

AWS

Docker

GitLab CI/CD

Spring Boot

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
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