Job Title: Senior Java Developer
Location: Wroclaw, Poland (Hybrid – 3 days in a week to onsite)
Job Type: B2B Contract
Exp level: 10+ yrs
Your role
Are you a strong software engineer who combines technical depth with a passion for building high quality, scalable solutions? Do you thrive in a fast paced environment where you can contribute to both engineering excellence and delivery outcomes?
Key responsibilities will be to
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Design, build, and enhance Java Spring Boot microservices and REST and GraphQL APIs across the order and trade lifecycle, including order capture, validation, routing, execution, allocation, and booking.
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Build event‑driven integrations using Kafka and ActiveMQ to deliver reliable, real‑time order and trade flows.
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Develop AWS serverless solutions using Lambda, API Gateway, S3, Step Functions, DynamoDB, and CloudFormation, and manage data on PostgreSQL and MongoDB.
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Apply engineering best practices, including clean code, CI/CD, secure SDLC, and automated testing with JUnit and Mockito.
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Optimize the performance of low‑latency, high‑throughput services, contributing to resilient and scalable trading systems.
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Build GenAI and LLM capabilities using retrieval‑augmented generation (RAG), vector databases, and Spring AI to enhance order and trade workflows.
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Collaborate closely with Product Owners, Architects, and engineers, and contribute to code reviews, testing strategies, and trouble shooting of complex technical issues.
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Apply DevOps practices, including monitoring, logging, and operational readiness in delivered solutions.
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Support modernization efforts by helping evolve legacy systems toward modular, cloud‑native, and event‑driven architectures.
Your expertise
Software engineering & technical skills
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Strong hands‑on experience in Java, building scalable microservices with Spring Boot, Spring MVC, and Spring Data, and designing REST and GraphQL APIs.
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Experience with event‑driven messaging using Kafka and ActiveMQ, and with data stores such as PostgreSQL and MongoDB.
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Experience delivering through CI/CD pipelines with automated testing using JUnit and Mockito, and applying performance optimization, reliability, and secure development practices to low‑latency, high‑throughput services.
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Hands‑on experience with GenAI/LLM application development, including RAG, vector databases and Spring AI.
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Ability to contribute hands‑on to development and problem solving of complex technical challenges.
Collaboration & delivery
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Experience working in Agile delivery models.
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Strong collaboration skills across engineering, product, and architecture teams.
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Ability to communicate technical concepts effectively with both technical and non‑technical stakeholders.
Qualifications
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Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field (or equivalent experience).
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8+ years of hands‑on Java software engineering experience within large‑scale or complex environments.
Nice to have
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Exposure to order management, trade execution, or trading platforms in financial services or wealth management.
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Experience contributing to engineering standards, best practices, or shared components.
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