G4S - Αγγελίεσ - Θέσεισ Εργασίασ

application support engineer

May 5, 2026 From G4S
Μεταμόρφωση·On Site·Πληροφορική·Permanent·Full Time

About the job

We are seeking a skilled and motivated L3 Application Support Engineer to join our Technology team. In this role, you will be responsible for developing and supporting internal and client-facing software applications, ensuring the design, quality and reliability of our solutions through rigorous QA, testing, and assessment procedures.

Key Responsibilities & Accountabilities


● Serve as the primary Technical Subject Matter Expert (SME) of IoT Application Solutions contributing to solution design and offering

● Assume end-to-end accountability for software service requests. Execute root-cause analysis and implement direct, code-level resolutions to system issues.

● Handle L2 and L3 software support requests and coordinate with vendors to resolve issues efficiently

● Orchestrate and facilitate User Operational Testing (UOT) phases in collaboration with key stakeholders to validate system integrity, performance, and operational readiness prior to production release

● Author and systematically maintain rigorous technical documentation, encompassing system architectures, API endpoint specifications, and operational workflows for all newly developed and modified solutions

Job requirements

Main Requirements

● Bachelor’ s degree in Software Engineering, Computer Science, or a closely related field.

● 3+ years of experience in a software engineering, application support, or DevOps role

● Proven hands-on programming experience with .NET (C#) and a strong understanding of relational databases. Experience with RESTful APIs and version control (e.g., Git) is highly preferred

● Knowledge and experience of workflow-based systems (e.g. Zoho) will be considered an advantage

● Strong analytical and problem-solving skills, with the ability to troubleshoot complex technical issues effectively

● Excellent communication and interpersonal skills to effectively collaborate with cross-functional teams and provide top-notch customer support

● Enthusiasm for staying updated with the latest industry developments and eagerness to bring innovative solutions to the organization

● Proficiency in English

We Offer

  • Competitive remuneration package

  • Private health and life insurance

  • Mobile phone and Laptop

  • Career development opportunities

  • A collaborative and modern work environment

About the company

Η G4S, μέλος του ομίλου της Allied Universal®, είναι o κορυφαίος παγκοσμίως πάροχος ολοκληρωμένων υπηρεσιών ασφαλείας. Στην Ελλάδα, δραστηριοποιούμαστε από το 1979 και απασχολούμε περισσότερους από 2.700 εργαζομένους. Η αποστολή μας είναι η προστασία της ανθρώπινης ζωής και περιουσίας από κακόβουλες ενέργειες και καταστροφές.


Η G4S διαδραματίζει πολύτιμο και σημαντικό ρόλο στην κοινωνία. Παρέχουμε άμεση απασχόληση σε πάνω από μισό εκατομμύριο ανθρώπους σε όλο τον κόσμο και κάνουμε τη διαφορά βοηθώντας τους ανθρώπους να ζουν και να εργάζονται σε ένα ασφαλές περιβάλλον.


G4S is a leading security and facility services company that provides proactive security services and cutting-edge smart technology to deliver tailored, integrated security solutions that allow clients to focus on their core business. Through a global workforce of approximately 800,000 people, we leverage best practices in communities all over the world. With revenues at approximately $20 billion, we are supported by efficient processes and systems that can only come with scale to help deliver our promise locally: keeping people safe so our communities can thrive.


For more information on G4S, visit www.g4s.com.

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G4S - Αγγελίεσ - Θέσεισ Εργασίασ

application support engineer

May 5, 2026 by 

G4S

Μεταμόρφωση

Μεταμόρφωση

On Site

Πληροφορική

Permanent

Full Time

About the job

We are seeking a skilled and motivated L3 Application Support Engineer to join our Technology team. In this role, you will be responsible for developing and supporting internal and client-facing software applications, ensuring the design, quality and reliability of our solutions through rigorous QA, testing, and assessment procedures.

Key Responsibilities & Accountabilities


● Serve as the primary Technical Subject Matter Expert (SME) of IoT Application Solutions contributing to solution design and offering

● Assume end-to-end accountability for software service requests. Execute root-cause analysis and implement direct, code-level resolutions to system issues.

● Handle L2 and L3 software support requests and coordinate with vendors to resolve issues efficiently

● Orchestrate and facilitate User Operational Testing (UOT) phases in collaboration with key stakeholders to validate system integrity, performance, and operational readiness prior to production release

● Author and systematically maintain rigorous technical documentation, encompassing system architectures, API endpoint specifications, and operational workflows for all newly developed and modified solutions

Job requirements

Main Requirements

● Bachelor’ s degree in Software Engineering, Computer Science, or a closely related field.

● 3+ years of experience in a software engineering, application support, or DevOps role

● Proven hands-on programming experience with .NET (C#) and a strong understanding of relational databases. Experience with RESTful APIs and version control (e.g., Git) is highly preferred

● Knowledge and experience of workflow-based systems (e.g. Zoho) will be considered an advantage

● Strong analytical and problem-solving skills, with the ability to troubleshoot complex technical issues effectively

● Excellent communication and interpersonal skills to effectively collaborate with cross-functional teams and provide top-notch customer support

● Enthusiasm for staying updated with the latest industry developments and eagerness to bring innovative solutions to the organization

● Proficiency in English

We Offer

  • Competitive remuneration package

  • Private health and life insurance

  • Mobile phone and Laptop

  • Career development opportunities

  • A collaborative and modern work environment

On Site

Πληροφορική

Permanent

Full Time

About the company

Η G4S, μέλος του ομίλου της Allied Universal®, είναι o κορυφαίος παγκοσμίως πάροχος ολοκληρωμένων υπηρεσιών ασφαλείας. Στην Ελλάδα, δραστηριοποιούμαστε από το 1979 και απασχολούμε περισσότερους από 2.700 εργαζομένους. Η αποστολή μας είναι η προστασία της ανθρώπινης ζωής και περιουσίας από κακόβουλες ενέργειες και καταστροφές.


Η G4S διαδραματίζει πολύτιμο και σημαντικό ρόλο στην κοινωνία. Παρέχουμε άμεση απασχόληση σε πάνω από μισό εκατομμύριο ανθρώπους σε όλο τον κόσμο και κάνουμε τη διαφορά βοηθώντας τους ανθρώπους να ζουν και να εργάζονται σε ένα ασφαλές περιβάλλον.


G4S is a leading security and facility services company that provides proactive security services and cutting-edge smart technology to deliver tailored, integrated security solutions that allow clients to focus on their core business. Through a global workforce of approximately 800,000 people, we leverage best practices in communities all over the world. With revenues at approximately $20 billion, we are supported by efficient processes and systems that can only come with scale to help deliver our promise locally: keeping people safe so our communities can thrive.


For more information on G4S, visit www.g4s.com.

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