Backend Software Engineer (Java)

Java

Backend Software Engineer (Java)

Java
al. Jana Pawła II 22, Warszawa

TransactionLink

Full-time
B2B
Senior
Remote
6 610 - 7 712 USD
Net per month - B2B

Job description

WHO WE ARE

TransactionLink is the world’s first automation platform for building complete digital onboarding experiences. We are doing for B2B onboarding what Revolut did for B2C — removing friction and accelerating customer activation. Our no-code platform turns complex KYB/KYC requirements into simple, configurable onboarding flows used by leading European fintechs and financial institutions.


By orchestrating hundreds of data sources and handling millions of compliance-critical requests every day, TransactionLink enables businesses to sign up new customers in minutes, not weeks — while significantly reducing manual work and staying fully compliant with financial regulations.


We've raised over €6M from investors behind companies like Revolut, Kraken, and Stripe, and have grown 8x in the past year alone.


ABOUT THE ROLE

As a Senior Backend Engineer at TransactionLink, you’ll play a key role in scaling our no-code orchestration platform for onboarding and compliance. You’ll design distributed systems on AWS, build event-driven microservices in Java or Kotlin, and help shape both product and technical direction. This is a high-impact role with full ownership, working closely with a product-first team in a fast-growing fintech environment.


WHAT YOU’LL DO

  • Develop and evolve our no‑code orchestration platform, enabling customers to design, launch and monitor onboarding & compliance workflows without writing code.

  • Design and implement large‑scale distributed systems on AWS, leveraging microservices and event‑driven architectures to ensure security, resilience and scalability.

  • Influence technical and product decisions, balancing engineering best practices with commercial priorities.

  • Drive innovation & experimentation, prototype new ideas, measure impact and iterate fast.

  • Guarantee operational readiness, meet or exceed our commitments on reliability, availability and performance for all customer‑facing services.


WHO YOU ARE

  • Bachelor’s degree in Computer Science or a related field

  • 7+ years of backend engineering experience

  • Advanced proficiency in Java or Kotlin and Spring Boot

  • Proven success designing and operating large‑scale, fault‑tolerant systems on AWS

  • Hands‑on expertise with event‑driven architectures (Kafka, Kinesis, or similar)

  • Deep understanding of microservices, observability, disaster‑recovery strategies and secure coding practices

  • Demonstrated ability to lead and mentor engineers, align technical decisions with product goals and influence stakeholders

  • Familiarity with modern JavaScript frameworks on the front end is a plus

  • Bonus points for open‑source contributions or experience in fintech / reg‑tech domains


WHAT WE OFFER

  • 20 days of paid leave per year

  • Options package

  • Annual professional development budget

  • A modern tech stack and strong engineering culture

  • Excellent team of highly qualified and motivated colleagues

  • Fast-moving environment with big ownership and immediate impact



Tech stack

    Java

    master

    Spring

    master

    Spring Boot

    master

    PostreSQL

    advanced

    AWS

    advanced

    Hibernate

    advanced

Office location

Published: 29.09.2025