Senior PostgreSQL Consultant / MS SQL Migration

Twoday is the leading digital transformation partner in Northern Europe with a global presence. With approximately 3,000 technologies, we collaborate with the most admired private and public organizations to deliver cutting-edge digital solutions. Our deep industry expertise spans Data & AI, software development, digital experiences, and business applications. Operating across the Nordics and Lithuania, our team generated a revenue of 280 million euros in 2023. We serve over 8,000 customers, supporting their digital transformation journeys.

Senior PostgreSQL Consultant – MS SQL Migration (Public Sector) – Copenhagen (Onsite)

We are looking for a Senior PostgreSQL Consultant to join Twoday in a permanent position, where your first assignment will be onsite with a public sector client in Copenhagen.

You will act as a trusted advisor in a large-scale, business-critical database migration from MS SQL to PostgreSQL on a modern cloud-native platform. This is a strategically important transformation with significant technical complexity and long-term impact.

About the role

You will work closely with a highly skilled in-house team, providing expert guidance throughout the migration journey. While the client team will execute the implementation, your role will be to advise, review and ensure quality across architecture, tooling and migration strategy.

The environment is technically advanced, covering Kubernetes, cloud-native tooling and a complex existing MS SQL estate with deep use of stored procedures, triggers and custom logic.

Key responsibilities

• Act as technical advisor on MS SQL to PostgreSQL migration strategy

• Assess existing T-SQL codebase and evaluate complexity and migration approach

• Define migration architecture and tooling (e.g. pgloader, Migration Toolkit or similar)

• Design PostgreSQL setup using CloudNativePG on Kubernetes (HA, backup, monitoring, storage)

• Provide guidance on T-SQL to PL/pgSQL conversion and application adaptations

• Review proof of concepts, test strategies and cutover plans

• Advise on low-downtime migration strategies, including replication approaches

• Support the client team throughout implementation and final cutover

Requirements

• Strong experience with PostgreSQL in production environments

• Proven track record with MS SQL to PostgreSQL migrations

• Solid understanding of database architecture, performance and optimisation

• Experience with Kubernetes and cloud-native database operations (preferably CloudNativePG)

• Familiarity with complex database estates (stored procedures, triggers, functions, jobs)

• Ability to work in an advisory role, collaborating closely with engineering teams

• Fluent in Danish or English (English is acceptable due to the specialised nature of the role, but you need to be based in Denmark)

• Ability to work onsite in Copenhagen

The process

Telephone interview with a Talent Acquisition Partner

Interview with hiring manager via Teams

Technical interview via Teams

Final onsite interview with hiring manager

About Twoday

Twoday has modern offices in more than 30 locations across Norway, Sweden, Denmark, Finland and Lithuania. We offer an engaging work environment with high professional standards and a strong sense of community. With us, you will have the opportunity to develop both professionally and personally in an international and innovative organisation.

What we offer

Twoday offers a flexible and collaborative working environment with strong professional communities across the Nordics.

We offer:

• The opportunity to work with complex, business-critical systems where security matters

• A central role with high responsibility and technical influence

• Opportunities for learning, certification, and professional development

• A strong technical environment with knowledge sharing and collaboration

• A comprehensive employee package including pension, health insurance, and additional benefits

Diversity & inclusion

Do you not meet all the requirements? Studies show that women and minorities are less likely to apply if they don’t meet every qualification. At Twoday, we are committed to building an inclusive workplace where everyone is welcome.

If this role excites you, we encourage you to apply.