Software Developer, Data - Data Engineering Team

At Celtra, data is an important part of our business and the products we build. We ingest and transform data from internal and external sources to power our products, provide business intelligence, and increasingly enable AI-powered experiences for our teams.

We’re looking for a Software Engineer, Data to join our horizontal Data Engineering team, working across business functions. This is a software engineering role focused on building data systems and features end to end—from understanding the data and concrete use cases to moving and transforming it, building the services that make it useful, and the infrastructure that makes it all possible.

You’ll work directly with product engineering and go-to-market (GTM) teams, turning their questions and use cases into reliable data systems that inform decisions, from product direction to sales, marketing and customer success.

What tools do we use?

Our data platform is centered around Snowflake, with Fivetran for ingestion and Matillion handling much of our transformation and orchestration.

We’re beginning a gradual transition toward a more code-driven platform, with orchestration and SQL transformations managed through software engineering workflows. You’ll help shape and build that platform while maintaining and improving the production pipelines we rely on today.

AI is also part of how we build software. Engineers orchestrate coding agents to offload repetitive and tedious work, while staying responsible for technical decisions, quality, and outcomes.

Your responsibilities

• Own and build data features end to end, working across data pipelines and services and taking them through to production.
• Understand the data, its sources, and its intended uses, and design and evolve data models that are clear, maintainable, and reusable.
• Help design and deliver the gradual migration from Matillion to a code-driven orchestration and transformation platform, preserving reliability throughout the transition.
• Build and improve our data pipelines and infrastructure, from ingestion and transformation to orchestration, reliability, and production operation.
• Work with business and product stakeholders, clients, and vendors to understand needs, investigate problems, and turn them into practical technical solutions.
• Contribute to the evolution of our data platform, including data quality, governance, observability, and AI-powered capabilities.

Qualifications

• Strong software engineering fundamentals, with experience building and operating production data pipelines and ingestion systems.
• Strong SQL and data modeling skills, with experience working with layered transformation patterns such as raw/staging, intermediate, and curated data models.
• Good understanding of software engineering practices such as automated testing, CI/CD, and production observability.
• Ability to independently own and deliver complex engineering work, from stakeholder collaboration and understanding the problem through implementation and production operation.
• Good verbal and written English communication skills.

What brings extra points?

• Hands-on experience with Snowflake, dbt, Fivetran or other ingestion frameworks, Terraform, TypeScript, or Python.
• Experience building distributed systems, asynchronous workflows, or orchestration systems.
• Experience designing data quality, observability, or governance systems.
• Experience building or improving development harnesses for coding agents and agentic workflows.
• Experience developing AI agents or systems that provide AI applications with access to structured company data.

What we value

You don’t need to know every tool in our stack. What matters more is that you’re curious, proactive, and motivated to grow.

We value engineers who like to understand how things really work, take ownership beyond the initial implementation, and enjoy working closely with people across business functions. You should enjoy turning ambiguous problems into practical solutions and continuously expanding what you can take on independently.

Why Celtra?

• Impact: Create high-quality digital work for leading global brands across a wide range of campaigns and formats.
• Culture: We’re inventive, collaborative, and proudly a little bit quirky - because doing great work should also be fun.
• Flexibility: Hybrid with strong hubs in Ljubljana, London and New York, and team get-togethers that keep us connected.
• Growth: You’ll learn from experienced team members  and grow into bigger roles as you go.

What we offer?

• Flexible working hours and hybrid work based on a fixed number of in-office days.
• A dedicated educational budget to explore new skills and deepen your expertise.
• Equipment of your choice.
• Knowledge shares.
• Additional pension and health insurance.
• WFH budget. An additional budget of 500 EUR to set up your home space.
• Employee well-being. Dedicated budget for any kind of wellness activities such as fitness, yoga, etc.

About Celtra

Celtra helps enterprise advertisers, media, and agencies design, approve, and deliver digital creative across the ever-growing number of campaigns, markets, designs, and variants. Celtra’s Creative Automation & Enablement Software for helps brands move faster than ever while dramatically scaling content production. Companies like adidas, TripAdvisor, Spotify, Unilever, NBCU, Lululemon, YETI, Vice, and hundreds more partner with Celtra to cut production costs while increasing efficiencies and output in the cloud.

Empowering Creativity through Diversity & Inclusion

Our mission is to empower creativity - and we cannot fulfill our mission without different perspectives. Diversity drives innovation, and Celtra is committed to diversity, equity, inclusion, and belonging.

Every employee is empowered at Celtra - no matter your race, age, religion, gender identity, sexual orientation, physical or mental ability, or ethnicity.  We hire the best, and develop our teams through continuous education and mentorship, in a community where everyone can bring their whole selves to work.

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