Software Developer

Spektrum Group

. Support the preparation of a new release of the JChat Java Client .

Posted 6/8/2026contractRemote • 🇪🇸 SpainMid-LevelSenior💰 €75 - €120 per hourWebsite

Tech Stack

Tools & technologies

AngularJavaMaven

About the role

Key responsibilities & impact

Support the preparation of a new release of the JChat Java Client
Support the preparation of a new release of the JChat Web Client
Support the preparation of a new release of the JChat Openfire Server
Support the preparation of a new release of the M-Link server for JChat
Represent the JChat team in test events
Maintain the development pipeline
Participate in Scrum meetings. Estimated per developer at 2.5 hours of standup per two-week development activity, four hours of refinement per two-week development activity, four hours of review per two-week development activity, a retrospective meeting and planning meeting per two-week development activity
Under this work package the contractors of the supplier will support the development of a new version of the JChat Java client software following the Scrum methodology based on a backlog of tickets that is maintained in JIRA by the Purchaser.
All activities for the preparation of the release, e.g. development, documenting, testing and reviewing, release building will be expressed as tickets with Story Points (SP) under this work package.
Under this work package the contractors of the supplier will support the development of a new version of the JChat web client software following the Scrum methodology based on a backlog of tickets that is maintained in JIRA by the Purchaser.
All activities for the preparation of the release, e.g. development, documenting, testing and reviewing, release building will be expressed as tickets with Story Points (SP) under this work package.
Under this work package the contractors of the supplier will support the development of a new version of the JChat Openfire software following the Scrum methodology based on a backlog of tickets that is maintained in JIRA by the Purchaser.
All activities for the preparation of the release, e.g. development, documenting, testing and reviewing, release building will be expressed as tickets with Story Points (SP) under this work package.
Under this work package the contractors of the supplier will test and integrate a new version of the JChat M-Link server software following the Scrum methodology based on a backlog of tickets that is maintained in JIRA by the Purchaser.
All activities for the preparation of the release, e.g. development, documenting, testing and reviewing, release building will be expressed as tickets with Story Points (SP) under this work package.
Under this work package at least one of the contractors of the supplier will represent the JChat team during the CWIX IPC event and the INTEND event.
Under this work package the contractors of the supplier will maintain and implement changes to the development pipeline (tool chain) for the JChat products following the Scrum methodology based on a backlog of tickets that is maintained in JIRA by the Purchaser.

Requirements

What you’ll need

The proposed developer has a track record (at least five years) in software development using Java, including Java Swing and web development using Angular;
The proposed developer is well able to produce efficient, clear, readable, maintainable and high-quality code;
The proposed developer has a track record (at least five years) with development of chat related products based on XMPP, including but not limited to the implementation of XEPs, the M-LINK Server, the Openfire Server and the Openfire plugin framework, troubleshooting XMPP communication;
The proposed developer has solid experience with working with Scrum;
The proposed developer has relevant and recent experience in continuous software integration and automated testing, including knowledge of test automation frameworks, using Maven, Jira, GitLab, Zephyr;
The proposed developer has a flexible, cooperative and customer focussed attitude; sets high standards for quality and quantity; monitors and maintains quality and productivity; works in a systematic, methodical and orderly way;
The proposed developer has the nationality of one of the NATO nations.

Benefits

Comp & perks

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Hard Skills & Tools

JavaJava SwingAngularXMPPM-LINK ServerOpenfire Servertest automation frameworksMavenGitLabZephyr

Soft Skills

efficient code productionclear communicationreadable codemaintainable codehigh-quality codeflexible attitudecooperative attitudecustomer focusedhigh standardssystematic approach