Database Engineer – Oracle to PostgreSQL Migration
Database Engineer – Oracle to PostgreSQL Migration
Location: Stockholm, Sweden (Hybrid – 2 days onsite per week)
Employment Type: Contract (6 months with strong possibility of extension)
Start Date: Mid-September 2026
About the Role
We are looking for an experienced Database Engineer to join a large-scale database modernization project. In this role, you will play a key part in migrating enterprise database services from Oracle to PostgreSQL while ensuring high performance, stability, and reliability throughout the migration process.
This position combines hands-on migration work with database analysis, optimization, and collaboration with development teams to deliver scalable and maintainable database solutions.
Key Responsibilities
Plan and execute Oracle-to-PostgreSQL database migration activities.
Design and implement efficient PostgreSQL database solutions.
Review database schemas, configurations, and application database interactions.
Identify performance improvements and optimization opportunities.
Ensure database integrity, stability, and compatibility during migration.
Collaborate with software engineers and technical teams throughout the project.
Prepare technical documentation, migration guidelines, and best practices.
Required Qualifications
Proven experience as a PostgreSQL Database Administrator or PostgreSQL-focused Database Engineer/Developer.
Strong knowledge of PostgreSQL administration and performance tuning.
Solid understanding of Oracle database concepts and architecture.
Hands-on experience delivering Oracle-to-PostgreSQL migration projects.
Experience with SQL and database design principles.
Familiarity with Liquibase or similar database versioning and change management tools.
Ability to work independently while collaborating effectively within cross-functional teams.
Strong analytical and problem-solving skills.
Preferred Qualifications
Experience working with Java applications connected to PostgreSQL.
Knowledge of distributed systems or messaging platforms such as Kafka or Solace.
Familiarity with AI-assisted development tools such as Cursor or Claude.
Experience supporting high-volume production systems and low-downtime database migrations.
Work Arrangement
Hybrid work model with two onsite days per week in Stockholm.
Initial contract of six months with a strong possibility of extension.
Start in mid-September 2026.
ComeOn Group in short Founded in 2008, ComeOn Group is a leading global player in the rapidly growing iGaming market. Having launched its first online brand in 2010, ComeOn Group is running a wide range of exciting brands across multiple markets. Operating more than 20 brands on its proprietary platform providing a secure, innovative and entertainment-led player experience across casino and sports betting. ComeOn Group is an international employer within the iGaming industry and has over 500 talented employees across 7 main locations. Location: Stockholm, Sweden ComeOn Group is a data-driven company, and our Database Platform Engineering & Operations team plays a key role in enabling reliable and scalable data across the business. We are looking for a hands-on Database Platform Engineer with strong database development skills and a passion for working with data systems in production. You will work closely with operations, engineering and data teams across the company, supporting MySQL and MongoDB environments while contributing to schema design, query optimization, and performance improvements. This role is ideal for someone who enjoys both development and operational work. You will be involved in supporting live systems, handling data migrations and integrations, modernizing legacy systems and helping improve how data flows across the organization. A strong willingness to learn, take ownership, and grow in the areas of databases and data engineering is essential. The position offers the opportunity to develop into broader database and data platform responsibilities over time, contributing to the reliability, performance and evolution of our data systems. Responsibilities: Write, optimize and troubleshoot complex SQL queries and database operations. Contribute to database design, schema evolution and modernization of legacy database structures while working closely with developers to improve data models, application queries and overall database performance. Support large-scale data migrations, B2B integrations and live production changes with accuracy and attention to detail. Help maintain and improve real-time data pipelines and integrations between operational databases and analytics platforms. Collaborate openly across development, DevOps and Data teams while contributing to documentation, knowledge sharing and continuous improvement initiatives. Support and maintain MySQL, MongoDB and related systems across development and production environments. Participate in performance tuning, troubleshooting, monitoring and operational improvements. Automate recurring operational and development-related tasks. Support deployments, releases, access management, change processes and incident handling. Continuously learn and contribute to modern database engineering and data platform practices. About you: Essentials: 2–5 years of experience working with MySQL and/or MongoDB. Exposure to cloud platforms (BigQuery, AWS, GCP). Strong database development skills with confidence writing, optimizing and troubleshooting complex SQL queries. Good understanding of database design principles, schema evolution and performance optimization. Strong interest in databases, data engineering and modern data platforms. Strong communication and collaboration skills with the ability to work closely across development, BI/Data Warehouse and DevOps teams. Strong aptitude to learn, grow and take ownership in a hands-on engineering environment. Comfortable working with live production systems and operational environments. Experience with scripting or automation using Python, Bash or similar tools. Proactive, communicative and solution-oriented mindset. Proficient in English, both spoken and written. Benefits So what can you expect from ComeOn as a place of work? A competitive remuneration package! :moneybag: Fantastic quarterly team events and weekly company events :sunglasses: A one-time bonus to help you set up a comfortable workstation at home (we’re truly Hybrid!) On top of our Hybrid work arrangement, up to 40 days a year to work fully remote from anywhere 🌎 30 paid vacation days a year Generous pension and insurance benefits Brand new laptop and smartphone with fully paid plan Generous health subsidy benefit Company events, including breakfast mornings and Friday beers At ComeOn, we have adapted a Hybrid Work model which means that we offer our employees an option to pick their workstation for the day. Want to work from the office a few days a week and some days from home? That’s totally fine with us! ComeOn is known for their inviting and vibrant offices that offer creative areas for collaboration and desk set-ups designed for a Hybrid Work model. When you visit one of our offices you will always be welcomed by a friendly face that will take good care of you. It’s our curiosity that drives our innovative business forward and we work hard in a run together spirit and we always make sure to top it up by having fun! You will not regret picking ComeOn as your next place of work. At ComeOn Group we value diversity and we take concrete action to ensure fairness in our recruitment process. We are committed to assess candidates on their merit without discriminating against any applicant for whatever reason that is protected by law. We truly value you, as you are. Want to know more about us just visit our website www.comeon-group.com or any of our social media channels to take a deep dive into our culture! LinkedIn Instagram Facebook
Cambio is one of the Nordics' leading suppliers in e-health with a comprehensive offering for the entire health and care chain. Our e-health solutions supports health care professionals in their daily work and offer patients safer and more easily accessible care. We are proud to be an important part of Swedish healthcare. We are growing continuously and now have about 1000 employees in several countries. The position We are looking for the next Software Engineer within Database development to join our Data & Analytics department to continue the developing of solutions that turn healthcare data into actionable insights and ensure it is securely stored and accessible over time. The focus spans advanced analytics and reporting, efficient decision support, and compliant long-term archiving to meet regulatory and future needs. You’ll work with both existing and future-oriented database solutions, helping ensure high performance, reliability, and efficient data management as our systems evolve. About you We believe you have a genuine interest in database development and enjoy working hands-on with complex data structures. You bring solid technical skills and a curiosity that drives you to explore, understand, and improve database solutions. Tackling challenging problems in complex database environments is something you truly enjoy. You value collaboration and take pride in working closely with your team—as well as with other stakeholders—to solve problems and continuously improve existing solutions. You bring a quality-focused mindset and combine strong communication skills with a structured and proactive way of working. You’re comfortable managing multiple tasks and priorities, taking initiative to identify improvements, and build trusting relationships across teams to move work forward effectively. At Cambio, we value initiative and personal growth. Our culture is built on Trust, Care, and Together—values we believe are important to both our work and our people. It’s important to us that you recognize and identify with these values. Requirements · 3+ years of working with T-SQL and SQL Server. · Strong understanding of database design principles, including normalization, star schemas and indexing. · Strong experience in developing, optimizing, and maintaining high-performance stored procedures and functions · Experience with query optimization, execution plans, and performance tuning. · Knowledge of database best practices. · Can communicate fluently in English It's a bonus if you have · Experience of SSIS. · Experience in Business Intelligence or Data Warehouse. · Experience within the area of Swedish health and social care. · Experience working agile. Place of employment: Linköping or Stockholm Scope: Full-time, hybrid work model (three days per week in-office) Form of employment: Permanent employment, 6 months trial period Additional Information: The role involves access to sensitive information, therefore a background check will be conducted on the final candidate. We review applications and conduct interviews on a rolling basis, so we encourage you to apply as soon as possible via the link. We look forward to receiving your application! CAMBIO- FOR A HEALTHIER TOMORROW Welcome to a company where healthcare is improved every day. Here you will work with leading technology in a collaborative, trusting and empowering environment where your contribution will be appreciated and celebrated. In our caring culture you will have the opportunity to pursue different paths of professional growth. Seize the opportunity to do the most important work of your life. Read more about us here! A healthier tomorrow also means taking care of those who make it possible -explore our employee benefits Learn more about our recruitment process here Are you interested in Cambio but you don’t feel that this position is the perfect match? Check out our other open positions at our career site.
TL;DR We're looking for a Fullstack Engineer to ship features end-to-end — from database to UI. You'll build rock-solid systems that connect to CRMs, email providers, calendars, and sales tools, plus the interfaces reps use every day, while keeping latency low and reliability high. Must be obsessed with clean architecture, fast systems, and extreme ownership. Why join We’re a small, talent-dense team of engineers building a generation-defining company from Stockholm. We value speed, rigour, and extreme ownership. If you're obsessed with product, thrive in ambiguity, and want to push the edge of what agents can do, you’ll feel at home. You'll work on hard problems across the stack - building resilient integrations with enterprise systems, optimizing database queries, reducing API latency, and shipping the interfaces sales reps live in every day. Not another CRUD app. We're backed by founders and operators behind Lovable, OpenAI, Tandem Health, and Neo4j. Our customers across 10 countries report 90% less prospecting time, 3x market coverage, and 2x customer meetings. What you'll do (responsibilities) In one sentence: Ship features end-to-end — from the infrastructure that makes AI agents reliable, fast, and scalable to the interfaces reps use daily. Own features across the stack: Build complete slices — database schema, API, and React UI — and ship them to customers Own integrations end-to-end: Design and build integrations with CRMs, email, calendars, and sales tools Reduce latency relentlessly: Optimize database queries, implement caching strategies, and eliminate bottlenecks Scale the system: Design for horizontal scaling, handle increased load, and maintain <200ms response times Ship fast: Test ideas, run experiments, iterate daily on real customer feedback Shape the architecture: Make foundational decisions on database structure, API design, and system patterns Who you are Cracked engineer obsessed with building great software Comfortable with ambiguity, early-stage chaos, and fast iteration Thrive on new tech - LLMs, knowledge graphs, agents, you name it Experience with API integrations, webhooks, OAuth flows, and third-party systems Comfortable across the stack: TypeScript on both sides, React on the front Care deeply about performance, observability, and operational excellence Care more about solving problems than polishing abstractions Fully committed to the mission: not "just a job" What we offer A team of obsessed engineers, full of speed, rigour, and grit Mission-driven, no-BS culture: experiment, ship, learn Meaningful equity through qualified employee stock options (QESO) from day one Fully on-site in Stockholm - we believe in working together Top-tier compensation package Our stack Frontend: React Backend: Typescript, Neo4j, PostgreSQL, Node.js, Express Infrastructure: Docker, Google Cloud Agent: Typescript, LLMs (Claude, OpenAI, Gemini), Mastra About Spiich Labs Spiich is the agentic platform for sales teams. Reps focus on the human work — building relationships, building trust, and closing deals — while Spiich agents handle everything else: prospecting, lead generation, CRM updates, meeting prep, follow-ups, and everything in between. The system integrates knowledge graphs, memory, and agentic workflows to deliver real help - not just summarisation or search. We're backed by founders and operators behind Lovable, OpenAI, Tandem Health, and Neo4j. How we hire Submit your application Intro call with the team Technical interview Take-home exercise Join us for trial work lasting 2 days on-site. We'll see how you tick and you get to meet the team and explore whether joining Spiich feels right for you. We move fast — the full process typically takes under two weeks. How to Apply Drop us a line at filip@spiich.ai with your GitHub/LinkedIn, a note on why this excites you, and your proudest achievement. No CV needed.