Senior Backend Developer
B3 Consulting Poland · Poland
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Jul 1, 2026
Poland
Jul 20, 2026
What this job asks for AI summary
A senior backend engineering role focused on building and maintaining distributed, microservices-based systems within the payments domain. The work involves Java (17/21), Spring Boot, messaging tools such as Kafka or RabbitMQ, PostgreSQL, and cloud infrastructure on AWS or GCP with containerisation via Docker and Kubernetes. Payment security standards (PCI-DSS, tokenisation, encryption) are a core part of the scope. Candidates must be based in or authorised to work in Poland.
Senior level · 5+ years · Remote
“or” means any one of them counts — you don't need all of them.
We read this from the posting text with AI. Skim the description below before ruling yourself out.
How this req sits in the market our data
Roughly 8,900 people nationally plausibly meet what this posting asks for (software developers). range 5,300–16,000
Applicant volume Light — Few people clear these requirements, so an application that does clear them gets looked at. Worth applying to even if you miss a nice-to-have.
Rare in this occupation — lead with these, and say what you built with them.
Most people in this occupation already list these. Still required — just not what gets you shortlisted.
What the occupation pays Median $138,970 (middle half $107,524–$175,762).
Estimated from BLS employment for this occupation and area, per-skill prevalence across our listing corpus, and published wage benchmarks — as of Jul 28, 2026. It is a model, not a headcount.
Why we read it this way (9)
This role is based in Poland (candidates must live and/or hold work authorization in Poland) — US-market benchmarks will not apply.
Java 17 is the hard requirement; Java 21 is explicitly stated as preferred, so it is not a gate.
Spring WebFlux and Spring MVC are listed together as alternatives ('WebFlux/MVC') for the reactive/web layer requirement.
Kafka and RabbitMQ are listed as alternatives ('Kafka lub RabbitMQ'); Kafka is used as the primary name.
AWS and GCP are listed as alternatives ('AWS/GCP') for the cloud platform requirement.
PCI-DSS security knowledge (including tokenization and data encryption) is listed under the requirements section as a hard gate, reflecting the payment-application domain of the role.
No compensation figures are stated in the posting.
Caller marked this a fully-remote role — scored against the national candidate pool.
This role's work location reads as outside the US — the candidate pool, comp, and contention benchmarks here are US-only (BLS employment, Adzuna/USAJOBS demand, and certified H-1B wages), so treat them as a rough US reference, not a local market.
Read the full posting
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