European Union (EU) (UTC+01:00)
Last Update Last Updated: March, 2025

⛔ This job is currently unavailable

Senior/Lead Java Developer

Back-End Web (10.0 yr.).

Senior
Upper-Intermediate English

Required Skills

Java
Java
7.0 yr.
Spring Boot
Spring Boot
Hibernate
Hibernate
PostgreSQL
PostgreSQL
Docker
Docker

Nice to Have

OOP
OOP
Unix\Linux
SQL
SQL
NoSQL
NoSQL
CI/CD
CI/CD
REST
Kubernetes
Kubernetes
Git
Git
HTML5
HTML5
CSS3
JavaScript
JavaScript
React
React
ERP
JDK Tools
JPA
GitHub
GitHub
Gitflow

Summary

- 10+ years of experience in developing software in Java, Spring Boot, Hibernate;
- Strong knowledge of data structures, algorithms, and software development principles;
- Proficiency with OOP concepts, large-scale software architecture, networking and distributed system and UNIX/Linux environments;
- 5+ years of experience with PostgreSQL, strong understanding of relational databases and SQL;
- Experience with NoSQL databases;
- Knowledge of Cloud Services and cloud-native application development;
- Expert-level understanding of CI/CD principles, know-how of various tools, and passionate focus on CI/CD practices;
- Experience with containerization and orchestration frameworks such as Docker and/or Kubernetes;
- Location: EU (Poland is preferable), Bulgaria, Serbia, Georgia;
- The position is for a full time, long term project.

Are you a talented developer looking for a remote job that lets you show your skills and get decent compensation? Join Upstaff.com, a platform that connects you with hand-picked startups and scale-ups in the US and Europe.

About the Role:

As a Backend Engineer, you will be responsible for developing key technical solutions for complex purchasing and supply chain business platform. The system is a SAAS for raw materials strategic sourcing and analytics.

As a member of our engineering team, you will be expected to be a team player, own the product, and contribute and add meaningful innovation to our development. You will have a significant opportunity to be an important part of the client's team. You will collaborate closely with all other teams to assist in their functions.

Minimum qualifications:

  • Experience with data modeling and database design with a focus on performance;
  • 5+ years of experience with PostgreSQL, strong understanding of relational databases and SQL;
  • Experience with NoSQL databases;
  • Experience with service-oriented architecture (especially REST);
  • Knowledge of Cloud Services and cloud-native application development;
  • Expert-level understanding of CI/CD principles, know-how of various tools, and passionate focus on CI/CD practices;
  • Experience with containerization and orchestration frameworks such as Docker and/or Kubernetes;
  • Strong unit test and debugging skills;
  • Proficiency in code versioning tools such as Git;
  • 7+ years of experience* in developing software in Java, Spring Boot, and Hibernate;
  • Strong knowledge of data structures, algorithms, and software development principles;
  • Proficiency with OOP concepts, large-scale software architecture, networking and distributed systems, and UNIX/Linux environments;
  • Strong verbal and written communication skills;
  • Strong sense of analytical thinking and problem-solving skills;
  • Excellent attention to detail, effective time management, and multitasking skills;
  • Bachelor’s degree or equivalent practical experience;
  • Fluent in English.

Preferred qualifications:

  • Understanding of front-end technologies such as JavaScript, React, HTML5 and CSS3;
  • Prior experience with SCRUM/Agile methodologies;
  • Contributions to open-source projects;
  • Experience with purchasing and/or ERP systems.

Focused list of technical expectations:

  • Very strong Java experience, worked with recent releases, knows common data structures and JDK APIs;
  • Very strong Spring Boot experience has multiple professional experiences with spring boot-microservices, JPA;
  • Very strong experience with REST and other API protocols;
  • Very strong relational database experience, both database structure and query language;
  • Strong understanding of git, git-flow, GitHub flow, and application development lifecycle.

Key Responsibilities:

  • Responsibilities Writing well-designed, reusable, testable, and secure code by applying best software development practices; 
  • Designing and implementing low-latency, high-availability, and performant applications;
  • Architecting well-defined APIs for user-facing elements developed by front-end developers; 
  • Investigate 3rd party tools and assess fit to various requirements such as data management, performance, and security;
  • Create flow diagram cases;
  • Collaborating in a multi-disciplinary team;
  • Participating and conducting code reviews; 
  • Troubleshooting system-level integration and performance issues;
  • Discovering, learning, and implementing new technologies Improving the coding standards and processes within the team; 
  • Documenting the software components; 
  • Mentoring junior team members in best practices, pair programming, giving internal training, etc.

Interview process:

1. Initial technical assessment of the candidates, focusing exclusively on their technical expertise as per the requirements outlined in the job description.

2. General interview to evaluate the candidate’s soft skills and overall compatibility with the project team.

3. Client Technical Interview to assess the candidate’s suitability for the role.

Not your tech stack?

Join the Upstaff community and we are looking for the best project for you. 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).

We work with developers from 50+ countries in different regions: Europe, LATAM, the U.S. (W-9 form owners), Canada, Asia (Philippines, Indonesia), Oceania (Australia, New Zealand, Papua New Guinea), and the the UK.

  • We don’t have a legal and ethical basis to accept applicants from the following countries: Russia, Belarus, Iran, North Korea
  • We do not provide visa assistance, and our cooperation model does not include the benefits typically offered with direct hire.
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