---
title: 'Senior Database Architect (SQL Server & PostgreSQL) - B2B / Freelancers at Poland and Eastern Europe'
canonical: 'https://feeny.ai/job/senior-database-architect-sql-server-postgresql-b2b-freelancers-poland-and-5px9r9kx9pk6'
type: 'job'
last_seen: '2026-09-07'
---

# Senior Database Architect (SQL Server & PostgreSQL) - B2B / Freelancers at Poland and Eastern Europe

- **Company:** Poland and Eastern Europe
- **Location:** Bulgaria / Poland
- **Posted:** 2026-07-24
- **Last confirmed live:** 2026-09-07
- **Apply:** https://job-boards.greenhouse.io/xebiacee/jobs/6124215004

## Job description

Xebia is a global AI-first, digital transformation, and engineering partner. With over 25 years of experience and a team of 5,000 professionals across 16 countries, we help organizations design and build scalable products, platforms, and data-driven solutions.

We specialize in Artificial Intelligence, Data and Cloud, Intelligent Automation, and Digital Products, combining deep technical expertise with a strong focus on engineering excellence and a people-first culture.

In the CEE region, we’re a team of nearly 1,000 experts delivering modern applications, data platforms, and AI solutions for clients such as McLaren, Aviva, Deloitte, Spotify, Disney, ING, UPS, Tesco, Truecaller, AllSaints, Volotea, Schmitz Cargobull, Allegro, InPost, and many, many more. We work with leading technologies including AWS, Azure, GCP, Databricks, and Snowflake, and combine strong engineering culture with a consulting mindset and a continuous focus on growth and knowledge sharing.

Our client is a software company running a large, business-critical ERP system used to support core operational processes such as payroll, billing and workforce scheduling. The organisation is in the middle of a multi-year modernisation programme, moving away from a legacy technology stack toward a modern .NET/web-based platform, while keeping the legacy system fully operational in production throughout the transition.

Contract: B2B or Freelance

You will be:

Strong, hands-on SQL Server expertise (design, indexing, query optimisation, operational practices). Solid working knowledge of PostgreSQL, sufficient to assess migration feasibility and compatibility. Proven experience optimising query and index performance in production environments. Experience modernising or refactoring databases behind legacy applications. Ability to define and set up database observability/monitoring (baselines, diagnostics, wait stats, deadlock detection, alerting). A pragmatic, risk-aware approach that balances improvement effort against migration cost and business risk.

Your profile:

- Experience assessing and scoping SQL Server → PostgreSQL migrations (not necessarily having executed a full migration).
- Experience working in environments where legacy and modern systems coexist in production during a transition.
- Comfort working with Specification-Driven Development (SDD) frameworks such as OpenSpec, or similar structured requirements/traceability approaches.
- Ability to produce clear, prioritised, business-readable recommendations for non-DBA stakeholders.
- Work from the European Union region and a work permit are required.

Tasks

Review the current SQL Server database design, indexes, queries and operational practices. Identify performance issues, technical debt, risks and areas that are already working well. Recommend and prioritise pragmatic improvements. Assess the feasibility of migrating from SQL Server to PostgreSQL — identifying compatibility issues, risks, expected effort and possible migration approaches. Define and implement robust database observability and performance monitoring, including performance baselines, query-level diagnostics, wait statistics, blocking/deadlock detection, capacity trends and actionable alerting. Work within an AI-native engineering environment, using Specification-Driven Development (SDD) frameworks such as OpenSpec to structure requirements, implementation plans, validation and traceability.

Nice to have:

- Prior exposure to legacy 4GL or transpiled/generated codebases. Familiarity with .NET/Blazor application ecosystems as a consumer of the data layer. Experience with database-heavy ERP systems (payroll, billing, scheduling domains). Experience in AI-assisted/AI-native engineering workflows more broadly.

Recruitment Process:

CV review – HR call – Interview – Client Interview – Decision

## About Poland and Eastern Europe

## Company Overview
- **One-liner**: Xebia’s Poland & Eastern Europe (CEE) unit delivers AI-first digital transformation, data platforms, cloud engineering, and custom software for global enterprises.
- **Entity Type**: Private (part of Xebia Group)
- **Headquarters**: Wrocław, Poland (with main offices in Gdańsk and Rzeszów; additional hubs in Bulgaria, Romania, Czechia, etc.)
- **Founded**: The Polish entity formed through the acquisition of PGS Software and GetInData; Xebia itself was founded in 2001
- **Founders**: Not publicly disclosed for the CEE region; Xebia global was founded by Anand Sahay and others

## Core Business
- Primary industries: IT consulting, cloud & data engineering, AI/ML, custom software development
- Target customers: B2B, large enterprises and mid-market across fintech, e-commerce, media, fashion, airlines, logistics, streaming, telecom, retail
- Mission: “Shaping tomorrow with AI today” – combining human expertise with AI to help organizations design and build scalable, data-driven solutions

## Products & Services
- **Cloud & Platform Engineering**: Consulting and implementation for AWS, Azure, GCP, including migration, DevOps, and DevSecOps. (Service)
- **Data Platforms & Analytics**: End-to-end data engineering, Databricks, Snowflake, dbt, and analytics solutions. (Service)
- **AI & Machine Learning**: AI architecture, ML engineering, and AI platform development. (Service)
- **Digital Product Engineering**: Full-stack software development, mobile apps (iOS/Android), and custom application development. (Service)
- **Training & Knowledge Sharing**: Internal guilds, labs, meetups, and conference speaking; covers Azure, AWS, ISTQB, PMI certifications. (Service)

## Market Standing
- **Valuation / Market Cap**: Not publicly available (private entity)
- **Key Metric**: 1,000+ experts in the CEE region (part of 5,000+ global workforce)
- **Notable Investors / Partners**: Partners include Databricks, dbt, Snowflake, Azure, GCP, AWS (first AWS Premier Partner in Poland); clients named: McLaren, Aviva, Deloitte, Spotify, Disney, ING, UPS, Tesco, Truecaller, Allegro, InPost, etc.
- **Growth Signals**: Active hiring across 60+ roles (AI Architects, Data Engineers, DevOps, Java, etc.), 95% employee retention over 5 years, 30% hold principal/senior/mid-level positions, 60+ conference speakers, 20+ guilds, strong workation and remote culture

## Competitive Advantages
- **Deep cloud certifications and partnerships** – first AWS Premier Partner in Poland, Gold Partner for Databricks, Snowflake, GCP.
- **Strong engineering community** – over 20 internal guilds & labs, regular meetups (Software Talks, Data Tech Talks), and hosting one of Poland’s largest tech conferences.
- **Longevity & retention** – 95% of employees stay over 5 years, indicating strong culture and career growth.
- **Global delivery model** – combination of client-facing teams in US/Europe with nearshore (CEE, LATAM) and offshore (India) capacity, offering diverse project exposure.

## Strategic Focus
- **AI-first approach** – embedding AI into all service lines and internal operations.
- **Knowledge sharing and thought leadership** – support for conference speaking, open-source contributions, and continuous learning.
- **Scaling the CEE hub** – expanding headcount across cloud, data, and AI roles while maintaining a people-first, flexible work culture.

## Why Work Here
- **Work flexibility**: Hybrid/remote options; work from offices in Wrocław, Gdańsk, Rzeszów (Poland) or fully remote; up to 45 working days per year of “workation”.
- **Growth & development**: Personal development budget for tech & soft skills; full reimbursement for cloud certifications (Azure, AWS, ISTQB, PMI); mentoring and internal training.
- **Engineering culture**: Focus on modern open-source stacks, real ownership, guilds & labs, and a strong knowledge-sharing ethos (60+ conference speakers, meetups).
- **Perks & wellbeing**: Health and wellbeing support, team building events, referral program, and a diverse, inclusive workplace.
- **Notable**: “95% of Xebians have been with us for over 5 years” – signals long-term career stability.

## Sources
1. [xebia.com – Career at Xebia (Poland)](https://xebia.com/careers-poland/)
2. [job-boards.greenhouse.io – Xebia CEE Jobs](http://job-boards.greenhouse.io/xebiacee)
3. [xebia.com – Locations](https://xebia.com/locations/)
4. [job-boards.greenhouse.io – Additional job listing](https://job-boards.greenhouse.io/xebiacee/jobs/5991335004)
5. [xebia.com – Main site](https://xebia.com/)

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