Senior Java Developer

How to use this kit

Ground every answer in facts on this page and the original listing. We never invent Glassdoor-style reviews or salaries that are not in our data.

Interview prep

Be ready to walk through debugging a failing program, refactoring for efficiency, and clarifying requirements with non-developers. Practice explaining Java design choices, test/trial-run habits, and how you expand legacy code without breaking behavior.

Fit summary

Strong fit if you already lead Java design and maintenance in an on-site Kyiv setting and can show clear debugging, revision, and stakeholder-alignment examples. Employer-specific culture and pay data were not in the provided sources.

Day in the role

As a Senior Java Developer at Ajax in Kyiv, expect to design and rewrite Java services from specs and diagrams, debug and retest until results match intent, and extend existing programs for efficiency or new requirements. Day-to-day work also covers maintaining packages for data or workflow jobs, aligning with managers and engineers on intent, and running trial passes before release (O*NET 15-1251.00).

Skills to emphasize

• freeCodeCamp — Full Stack curriculum — free
• Saylor Academy — Computer Science courses — free
• CS50 (Harvard, via edX) — free to learn
• Microsoft Learn — developer training paths — free to learn

FAQ from this listing

Is this role remote?

No. The listing is for Kyiv with remote set to off, so plan for on-site work in the city.

What does a Senior Java Developer do day to day?

Per O*NET software-developer tasks: write and review programs, fix defects, extend systems, maintain packages, consult stakeholders, and run trial checks.

Which free learning paths match this occupation family?

CERTS lists freeCodeCamp and Saylor as free, plus CS50 and Microsoft Learn as free to learn—use them to shore up CS and full-stack gaps before interviews.

Occupation tasks (O*NET)

Public-domain labor data — prepare examples for 2–3 of these.

• Write, analyze, review, and rewrite programs, using workflow chart and diagram, and applying knowledge of computer capabilities, subject matter, and symbolic logic.
• Correct errors by making appropriate changes and rechecking the program to ensure that the desired results are produced.
• Perform or direct revision, repair, or expansion of existing programs to increase operating efficiency or adapt to new requirements.
• Write, update, and maintain computer programs or software packages to handle specific jobs such as tracking inventory, storing or retrieving data, or controlling other equipment.
• Consult with managerial, engineering, and technical personnel to clarify program intent, identify problems, and suggest changes.
• Conduct trial runs of programs and software applications to be sure they will produce the desired information and that the instructions are correct.
• Prepare detailed workflow charts and diagrams that describe input, output, and logical operation, and convert them into a series of instructions coded in a computer language.
• Compile and write documentation of program development and subsequent revisions, inserting comments in the coded instructions so others can understand the program.

O*NET source

Company facts (cached)

Asynchronous JavaScript and XML, usually referred to as Ajax is a set of web development techniques that uses various web technologies on the client-side to create asynchronous web applications. With Ajax, web applications can send and retrieve data from a server asynchronously without interfering with the display and behaviour of the existing page. By decoupling the data interchange layer from the presentation layer, Ajax allows web pages and, by extension, web applications, to change content dynamically without the need to reload the entire page. In practice, modern imple…

Public cache only — not an employee review.

Role overview (listing rewrite)

Senior Java Developer at Ajax in Kyiv The Opportunity Ajax Systems, a leading international tech company and Europe's largest manufacturer of security systems, seeks a Senior Java Developer to contribute to the development and evolution of our software solutions. Join a dynamic team dedicated to creating innovative B2B applications for business partners, monitoring companies, and rapid response teams. Day-to-Day Responsibilities Design and develop robust, scalable Java applications Collaborate with cross-functional teams to deliver high-quality software solutions Maintain and enhance existing systems to ensure optimal performance Participate in code reviews and contribute to technical decisions Stay updated on the latest advancements in Java technologies and best practices Skills & Qualifications Minimum of 5 years of experience as a Java Developer Strong understanding of Java, Spring Framework, and related technologies Familiarity with RESTful services and microservices architecture Experience with database management (SQL, NoSQL) Proficiency in version control systems like Git Excellent problem-solving skills and ability to work under pressure Bachelor's degree in Computer Science or a related field More About Ajax Ajax Systems is committed to innovation, quality, and customer satisfaction. Our team of experts works tirelessly to provide cutting-edge security solutions that meet the needs of businesses across Europe. We offer a collaborative work environment with opportunities for growth and development. Apply Today To apply, complete your application directly on this page, or you'll be redirected to the employer's application platform to finish submitting there.

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Questions to ask them

• What does success look like in the first 90 days for this role?
• How is the team structured, and who would I work with most?
• What tools and systems does this role use daily?
• Is the work primarily based in Kyiv, hybrid, or fully remote?