Java Developer (Fibra)

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

• Walk through debugging a failing Java service end to end.
• Explain how you refactor for efficiency without breaking contracts.
• Describe clarifying requirements with non-dev stakeholders.

Fit summary

Best fit if you already ship and maintain Java systems, like on-site Kyiv work, and are comfortable with review, repair, and expansion of production code. Public DATA here does not clearly identify this employer beyond the job title and location.

Day in the role

As a Java Developer (Fibra) at Ajax in Kyiv, a typical day centers on writing and reviewing backend or service code, fixing defects, and extending existing programs so they stay efficient and meet new requirements. You would run trial builds and checks, then clarify intent and trade-offs with managers, engineers, and other technical staff—on site, not remote.

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 marks remote as off; expect Kyiv-based work.

What kind of work is typical for this title?

Core software-developer tasks: write, review, debug, and extend programs, plus trial runs and stakeholder consults (O*NET).

Are there free ways to build related skills?

Yes—freeCodeCamp, Saylor CS, CS50, and Microsoft Learn paths listed above are free or free to learn.

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)

Java Developer (Fibra) at Ajax in Kyiv The Opportunity Ajax Systems, an international tech company and the largest manufacturer of security systems in Europe, is seeking a Senior Java Developer to join our System Division. This role offers you the chance to contribute directly to the development of cutting-edge software ecosystems that power Ajax's digital platform. You will have the opportunity to suggest and implement your own ideas, working with a motivated team in a fast-growing company. Responsibilities Develop and maintain OS Malevich and the Video Management System using Java and Kotlin. Create scalable cloud infrastructure and client applications for multiple platforms. Ensure that all system components work together as a unified ecosystem. Work with embedded, cloud, mobile, and desktop engineers to ensure stable operation of Ajax's digital platform. What We're Looking For Java: 3+ years of professional backend development in an enterprise environment. Kotlin: Knowledge and practical work experience. Java Concurrency: Strong understanding and practical application experience. Architecture & Design: Understanding of SOA, microservice, and event-driven architecture. Cloud Development Principles: Practical AWS experience. Scalability & High Availability: Ability to scale and ensure high availability of loaded systems. More About Ajax Ajax Systems is a leading manufacturer of security systems in Europe, known for its innovative technology. Our System Division builds and develops the Ajax software ecosystem, including OS Malevich and Video Management System, scalable cloud infrastructure, and client applications for multiple platforms. We use Java, Kotlin, Swift, C, C++, and Python to create robust solutions that work together seamlessly. Apply Today The opportunity to suggest and implement your own ideas that directly influence the product and its mass production is available at Ajax Systems. A place in a fast-growing company with a motivated and professional team awaits you, along with a competitive salary, medical insurance, English classes, and discounts from our internal beta-testing program for security systems. 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?