Back-End Engineer (Java/Spring, Release & Operations Support)

Technology stack

Backend: Java, Spring, Hibernate (monolith), JPA, Redis

Database: MariaDB, Flyway migrations

Testing & quality: JUnit 5, WireMock, API/Cucumber tests, CI, SonarCloud

Hosting & deployment: Linux, WAR deployment, Docker (local/CI), AWS S3

Integrations: third-party payroll and banking APIs, tax authority APIs, OpenAI, Mailgun

Delivery practices: feature flags, regular releases, roll-forward fixes

Frontend (awareness only): React, MobX, TypeScript, JavaScript

Tools: Jira, Confluence, Miro, Slack, Figma

You’ll join an established Techstack engineering team and work closely with the client’s internal developers and technical stakeholders. The team includes a Project Manager, Lead Software Engineer, QA Engineer, Senior Full-Stack Developer, and 2 Back-End Developers (these positions), plus the client’s Solution Architect and CTO. We work through daily stand-ups, bi-weekly demos, regular code reviews, and close collaboration with the client’s engineering team.

We are committed to implementing high standards in the technology industry, and it is the fundamental mission of our work. To achieve this goal, the company and all its members are constantly evolving.

Each of us has the opportunity to contribute to the product, the company, the team, the industry, and our personal development. At Techstack, you have the option to choose from various growth opportunities that align with your interests:

- meetups, where you can share your knowledge and develop simultaneously by sharing your experiences within the company and local technical communities;

- roles such as a mentor or a technical lead. In any of these roles, you will assist junior professionals and share your knowledge and experiences with them.

- participation in our technical Guilds, where you can discuss technical solutions, approaches, and industry trends.

All of these elements contribute to shaping the culture and expertise within both our team and the company as a whole.

Develop back-end functionality within the existing Java/Spring monolith: APIs, business logic, and data models.

Design and modify database schemas; implement safe schema and data migrations.

Implement accounting logic with strong data-integrity requirements: balanced entries, auditability, and no data loss.

Develop role-based access controls for new functionality.

Build and maintain reconciliation and validation tools to compare the new accounting logic with existing system behavior.

Write unit and integration tests and keep regression suites green.

Support production releases: CI pipelines, feature flags, deployments, and post-release monitoring.

Investigate application logs and help troubleshoot deployment and production issues.

Work closely with the Tech Lead, back-end and front-end developers, QA, PM, and the client’s engineering team.

Participate in code reviews and maintain technical documentation.

Stable and long-term position in an experienced team.

Broad opportunities for professional and career growth, including professional challenges that encourage personal development, meetups, hackathons, professional communities, and more.

Horizontal connections and the absence of micromanagement foster a collaborative environment in which all team members are accessible to one another for any concerns.

Hubs in Kharkiv, Kyiv, Lviv, and Wrocław (Poland), or everything necessary for remote work.

Up to 50% compensation for the cost of educational courses and conferences to support professional development.

Free English language and business English courses.

20 days off and 7 sick days to support your health and well-being.

Legal and accounting support.

Appreciation gifts for significant events and occasions.

Pre-screening with a Talent Acquisition Specialist.

English check.

Technical screening and evaluation with Techstack engineers.

Candidate profile submission to the client.