Senior Java Platform Engineer

Valora Outcomes; Warszawa; Hybrid; PLN 220,000 - 350,000; Full time

Benefits offered by this job

Remote-first

Flexible working hours

Equipment budget

Training budget

Private medical care

Job summary

Valora Outcomes is seeking a Senior Java Platform Engineer to design backend components of a large, distributed enterprise platform. You will focus on reliability, security, observability, and API quality while shaping end-to-end components rather than isolated tickets.

The role requires leading architectural decisions, building Kafka-based event-driven solutions and ensuring high availability. Remote-first with hybrid options in Warsaw, Poland, and a strong emphasis on production ownership.

Qualifications

• 5+ years of commercial backend development experience.
• Strong Java and Spring Boot skills.
• Experience designing REST APIs and service-oriented systems.
• Good SQL and relational database knowledge.
• Hands-on experience with Docker and CI/CD.
• Experience with messaging systems or event streaming.

Responsibilities

• Design and develop backend services in Java.
• Build APIs with clear contracts and documentation.
• Participate in architectural decisions around scalability and security.
• Design event-driven and asynchronous processing solutions.
• Improve system reliability through retries, circuit breakers, monitoring and alerting.
• Collaborate with Product, QA, DevOps, Security and other teams.
• Lead code reviews and mentor engineers.
• Support production quality through incident analysis and improvements.

Skills

Java

Spring Boot

REST APIs

SQL

Docker

CI/CD

Observability

Security

Kafka

Tools

Kubernetes

PostgreSQL

OpenTelemetry

GitHub Actions

OpenID Connect

Job description

All open positions

EngineeringRemote / Hybrid 3 min read

Senior Java Platform Engineer

Design backend components of a large distributed enterprise platform. Reliability, security, observability and API quality matter every day.

Employment Full-time

Location Warsaw / Remote (EU)

Work mode Remote-first / Hybrid in Warsaw

Job Overview

We are building the backend for a large distributed enterprise platform. The system processes critical data, integrates with multiple external systems and needs to stay reliable, secure, observable and maintainable in production.

This is not a role for someone who only wants to close isolated tickets. We need an engineer who can design a component end-to-end, make technical decisions and take responsibility for the outcome.

You will work on systems where backend engineering does not stop at endpoints. Reliability, scalability, observability, security, integrations, API quality and long-term maintainability matter every day.

What You Will Build

• Backend components of a large enterprise platform.
• Java and Spring Boot services.
• APIs for internal and external system integrations.
• Authentication, authorization and access control mechanisms.
• Event-driven solutions based on Kafka or similar technologies.
• Data processing components designed for retries, timeouts, partial failures and resilience.
• Observability layer: logs, metrics, tracing, alerting and production diagnostics.
• Components designed for security, auditability and high availability.

Responsibilities

• Design and develop backend services in Java.
• Build APIs with clear contracts, useful documentation and predictable behavior.
• Participate in architectural decisions around scalability, security and integrations.
• Design event-driven and asynchronous processing solutions.
• Improve system reliability through retries, circuit breakers, idempotency, monitoring and alerting.
• Optimize application performance and SQL queries.
• Collaborate with Product, QA, DevOps, Security and other engineering teams.
• Lead code reviews, mentor less experienced engineers and keep engineering quality high.
• Support production quality through incident analysis, root cause analysis and continuous improvements.

Technology Stack

• Backend
  • Java 17+, Spring Boot, REST API, Hibernate / JPA
• Architecture
  • microservices, service-oriented architecture, DDD, event-driven systems
• Messaging
  • Kafka, RabbitMQ or similar
• Security
  • Keycloak, OAuth2, OpenID Connect, RBAC, secure API design
• Data
  • PostgreSQL, SQL, relational databases, schema design
• DevOps
  • Docker, Kubernetes, CI/CD, GitHub Actions / GitLab CI / Jenkins
• Observability
  • OpenTelemetry, Prometheus, Grafana, ELK / OpenSearch
• Cloud
  • AWS, Azure or GCP are a plus

Requirements

• At least 5 years of commercial backend development experience.
• Strong Java and Spring Boot skills.
• Experience designing REST APIs and service-oriented systems.
• Good SQL and relational database knowledge.
• Hands-on experience with Docker and CI/CD.
• Experience with messaging systems or event streaming.
• Understanding of authentication and authorization concepts.
• Ability to design code that can be maintained for years.
• Ownership mindset and willingness to influence the technical direction of the team.
• English suitable for daily work in an international environment.

Nice to Have

• Keycloak, OAuth2, OIDC.
• Kubernetes and cloud-native development.
• Experience with high-availability systems.
• Knowledge of observability and incident management.
• Experience in enterprise or regulated environments.
• Previous experience as a technical owner or senior engineer leading architectural initiatives.

What We Offer

• Remote-first setup and flexible working hours.
• Participation in decisions about architecture, standards and technology choices.
• Small senior team without unnecessary process overhead.
• Budget for equipment, training and conferences.
• Access to test environments, development tools and production-grade infrastructure.
• Private medical care and benefits package.
• Fast recruitment process without long take-home assignments.

Who We're Looking For

We are looking for someone who understands that a good backend is not just an endpoint and a database.

It is contracts, security, data, retries, monitoring, deployment, maintainability and production ownership.

If you want to build systems that must work reliably, not just look good on an architecture diagram, we should talk.

Valora