Database Developer

Portugal, PT
Senior (4-6 Years)
Full remote
English Required Portuguese Required

Software development company building mobile applications. The role sits within a team responsible for database systems that support critical business processes, including handling of sensitive personal data under strict security and compliance requirements. The project involves ongoing performance optimisation, data migration and modernisation of data pipelines.

What you will do

  • Design, develop and maintain database solutions using MSSQL and Oracle.
  • Implement and manage version-controlled SQL migrations as part of the delivery pipeline.
  • Optimise query performance through indexing, execution plan analysis and SQL tuning.
  • Build and operate ETL/ELT processes integrating data from multiple heterogeneous sources.
  • Develop stored procedures, triggers, views and functions in production environments.
  • Ensure data security through encryption in transit and at rest, and enforce proper handling of sensitive data across environments.
  • Collaborate with cross-disciplinary teams and stakeholders to deliver defined project outcomes.

Location and work model

  • Remote
  • Experience with version-controlled, numbered SQL migrations (e.g. Flyway, Liquibase or equivalent)
  • Experience with data encryption in transit and at rest, and secure handling of live/sensitive data
  • Experience with query optimization and tuning in production, including execution plan analysis and indexing
  • Experience designing and operating ETL/ELT processes — 2+ years
  • MSSQL programming experience (stored procedures, triggers, views, functions) in production
  • Oracle programming experience (PL/SQL, packages, stored procedures)
  • Experience in information security and data protection practices
  • English B2
  • Portuguese

Nice to have

  • Postgraduate or specialist-level education in computer science, database science or software engineering
  • Experience with transaction control, locking and concurrency
  • Experience participating in cross-disciplinary teams and multi-stakeholder projects
  • Experience participating in or leading digital transformation or strategic initiatives
  • Experience taking ownership of work packages, deliverables or technical decisions
  • Knowledge of the responsible and structured use of artificial intelligence in database development involving sensitive personal data
We connect IT professionals with projects that match their skills, professional experience, and goals, then we offer a career progression program, delivered by in-house specialists - our People Experience Partners - to guide them through our journey with us.

What we offer:

  • A project that matches your skills and ambitions, as well as your preferences for working policies and culture.
  • A competitive salary with awesome benefits and opportunities to leverage your knowledge and network to earn additional income.
  • An empowering and respectful work culture enriched with social and learning events.
  • A People Experience Partner specially assigned to you - your go-to career guide, responsible for supporting your growth, facilitating training, and ensuring your work-life balance at KWAN.
At KWAN, they make sure that I feel comfortable with the client I’m working for and that what I’m doing aligns with my career aspirations.
Luis Caldeira, DevOps @ KWAN
At KWAN, I’m given the space to be myself and do what I love. I have control over the projects I work on, as well as the direction of my career.
Pedro Fonseca, Front End Developer @ KWAN
I see my People Experience Partner as someone who is always available to provide me with motivation and constant feedback, which helps me be sure that I am in the right place.
Josimar dos Reis, Software Developer @ KWAN
I know that I’ve contributed to the growth of a company that truly values a “people first culture”, because my ideas, experiences, and individuality were always appreciated.
João Nascimento, Software Developer (KWAN Alumni)
My two years at KWAN were an incredible experience! From the start, I was welcomed into a warm and collaborative environment where I felt truly supported.
Laís Ortiz, Software Developer @ (KWAN Alumni)
Grab this opportunity, apply now!

What You Can Expect as a KWANer

Respect isn’t optional here

You’re trusted to deliver and supported to speak up.

Dedicated People Experience Partner

Someone accountable for your growth, not your allocation.

Continuous learning, built in

Learning that keeps pace with the systems you build.

Recognition that’s visible

Your impact doesn’t go unnoticed. Through our Rocket Points System, we constantly recognize your contributions.

A culture you can feel

From movie and quiz nights to dinners and our annual summer gathering, we don’t just work together - we build real connections.

Flexible spaces to work your way

Remote-first, with physical hubs when you want connection.

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