Application Support & Sys Admin

Decskill; Lisboa; On-site; EUR 38,000 - 54,000; Full time

Job summary

Decskill is seeking an Application Support & Sys Admin to ensure production application availability, stability and performance from Lisbon, with strong DevOps collaboration. You will work across Production Support and Development teams, implementing fixes, upgrades, and ongoing improvements to platforms and services.

The role requires knowledge of Java servers, Linux, Kubernetes, API Gateways, CI/CD, IaC, and monitoring/observability, with ITIL practices and on-call readiness.

Qualifications

• Experience with Java application servers and Java performance analysis (heap/threads).
• Strong knowledge of Linux administration (RHEL or equivalent).
• Experience with monitoring and observability platforms and distributed tracing, metrics, logging, dashboards, and alerting.
• Experience with CI/CD pipelines and Automation/Infrastructure as Code (IaC).
• Experience with relational databases and ITIL processes.

Responsibilities

• Monitor and maintain application availability, stability, and performance.
• Manage incidents and problems, participate in major incident management and RCA.
• Coordinate fixes between Production Support and Development teams; implement upgrades and patches.
• Design, deploy and enhance applications with DevOps practices; support on-call rotations.

Skills

Team collaboration

Problem-solving

Time management

Attention to detail

English proficiency

Resilience

Autonomy

Tools

Kubernetes

API Gateway

CI/CD pipelines

IaC tools

Cloud platforms

Job description

We are growing. And we are looking for talented people!

At Decskill, we believe that technological excellence is driven by human talent.

We are an IT consulting company with more than 10 years of consolidated experience in the market, focused on building long-term relationships with both our clients and our people. Today, we are a community of over 800 professionals, working from Lisbon, Porto, and Madrid, contributing to impactful technology initiatives.

As part of the Astek Group, we combine a strong local culture with a global presence, being active in around 23 countries across 4 continents. This allows us to offer an international context, diverse challenges, and long-term career opportunities, while staying close to our teams.

We are looking for an Application Support & Sys Admin!

Responsibilities

Application Production Support & Stability

• Monitor and maintain application availability, stability, and performance.
• Manage and resolve incidents and problems in a timely manner.
• Participate in major incident management (P1/P2) and Root Cause Analysis (RCA).
• Identify incident trends and contribute to permanent solutions.
• Ensure compliance with ITIL processes and SLA commitments.
• Execute Change Requests and application deployments following ITIL and DevOps practices.
• Proactively identify and resolve technical issues to ensure business continuity.
• Participate in on-call rotations to support critical production applications.

Technical Support & Collaboration

• Act as the main point of contact between Production Support and Development teams.
• Troubleshoot issues and coordinate the implementation of fixes.
• Collaborate with Scrum teams to design, deploy, and enhance applications.
• Implement upgrades, patches, and new features while minimizing business impact.

Monitoring & Observability

• Implement and optimize monitoring and observability solutions.
• Collaborate with technical teams to define monitoring and observability best practices.
• Promote proactive monitoring to enable early detection and resolution of production issues.

Documentation & Knowledge Sharing

• Maintain up-to-date technical documentation.
• Develop and update troubleshooting guides and operational procedures.
• Share knowledge and best practices with the support team.

Additional Responsibilities

• Complete mandatory training required for the IT Production function.
• Support additional activities necessary for the effective operation of the Production Support team.

Requirements

Infrastructure & Middleware

• Experience with Java application servers.
• Knowledge of Java performance analysis, including heap dumps, thread dumps, and performance tuning.
• Experience with Kubernetes and cloud platforms.
• Experience with API Gateway technologies.

Operating Systems

• Strong knowledge of Linux administration (RHEL or equivalent).

Monitoring & Observability

• Experience with monitoring and observability platforms.
• Knowledge of distributed tracing, metrics, logging, dashboards, and alerting.

DevOps & Automation

• Experience with CI/CD pipelines.
• Knowledge of automation and Infrastructure as Code (IaC) tools.

Databases

• Experience with relational databases.

Methodologies

• Practical knowledge of Scrum.
• Experience working with ITIL processes and best practices.

Soft Skills

• Strong problem-solving and analytical thinking.
• Team collaboration.
• Resilience and adaptability.
• Ability to perform under pressure.
• Accountability and ownership.
• Self-driven and autonomous.
• Strong time management and prioritization skills.
• Goal-oriented with strong attention to detail.

Languages

• Good level of english.

Are you looking for an environment that values curiosity and commitment? Here, your contribution has real impact and individual growth is taken seriously.

What you can expect from us?

• Long-term projects with national and international context.
• Opportunities to grow technically and professionally.
• A people-first culture, focused on transparency and trust.
• Teams that value ownership, collaboration and stability.

Find with us the right opportunity to grow!

Decskill is committed to equality and non-discrimination with all our talents. We recruit and promote talent, based on diversity and inclusion, regardless of age, gender, ethnicity, race, nationality or any other form of discrimination incompatible with the dignity of the human being.