Senior/Expert Java Engineer

Back-End Web, AI and Machine Learning.

Senior

Upper-Intermediate English

Required Skills

Java

SQL

PostgreSQL

Nice to Have

Hibernate

Redis

MongoDB

AWS EC2

Presto S3

RDS

DRY

Unit Testing

Observer

AI

AWS

Stripe

AWS S3

Quality Assurance

ORM

Summary

Senior Java Engineer with extensive experience in Hibernate, SQL, PostgreSQL, and Redis, specializing in high-performance, scalable applications;
Expertise in AWS services (EC2, S3, RDS) and microservices architecture, with integration of Stripe payment systems in multiple projects over 3+ years;
Skilled in clean code principles, unit testing, and software design patterns;
Strong background in the real estate and financial domains, with additional AI experience enhancing solution innovation;
Direct hire model;
Duration: Long-term;
Start: ASAP;
Locations: Bulgaria preferred, Romania, and Poland.

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Job Description

We’re looking for a Senior/Expert Java Engineer to join a cross-functional team building a scalable, modern platform in the real estate and financial domain. The product operates across multiple regions and is активно evolving, with a strong focus on performance, scalability, and continuous feature development.

What you’ll do

Design, develop, and maintain high-performance Java-based applications;
Collaborate with cross-functional teams to deliver scalable and reliable solutions aligned with business needs;
Contribute to architectural decisions and drive best practices in software development;
Review code, mentor engineers, and help maintain high code quality standards;
Evaluate and introduce new technologies to improve system performance and team efficiency;
Support the platform’s scalability, resilience, and ongoing feature expansion.

What we’re looking for

Strong experience with Java and backend development in production environments;
Hands-on experience with relational databases (e.g., PostgreSQL) and SQL;
Experience working with caching solutions (e.g., Redis);
Solid understanding of microservices architecture and distributed systems;
Experience with cloud platforms (AWS preferred: EC2, S3, RDS);
Familiarity with ORMs (e.g., Hibernate);
Experience integrating with payment systems or third-party financial services;
Strong understanding of clean code principles, design patterns, and testing practices;
Ability to balance technical and business perspectives when making decisions.

Nice to have

Experience with NoSQL databases (e.g., MongoDB);
Exposure to AI-related technologies or data-driven systems;
Previous experience in domain-driven or high-scale platforms.

Additional expectations

Potential to grow into a technical leadership role;
Strong collaboration skills and team-oriented mindset;
Ability to work in a dynamic, evolving environment.

Education

Bachelor’s or Master’s degree in Computer Science or a relevant field

How to Apply for Senior/Expert Java Engineer

Be ready for the next steps:

Create your profile on our website (import from LinkedIn)
20-30-minute screening call
Technical interview feedback
Project Selection (we are looking for the best project for you).

Who can apply:

We work with developers across Europe, LATAM, the U.S. (W-9 form owners), Canada, Asia, Oceania, and the UK.
We do not provide visa assistance, and this cooperation model does not include direct-hire benefits.
We cannot accept applicants from Russia, Belarus, Iran, or North Korea.

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