Software Developer, Data - Data Engineering Team
First seen by Alion on Oct 23, 2026.
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 arelooking 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 will 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 are beginning a gradual transition toward a more code-driven platform, with orchestration and SQL transformations managed through software engineering workflows. You will 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.
- 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.
1. What brings extra points?
- 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.
2. What we value?
You do not need to know every tool in our stack. What matters more is that you are 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.
1. Why Celtra?
- Impact: Create high-quality digital work for leading global brands across a wide range of campaigns and formats.
- Culture: We are 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 will learn from experienced team members and grow into bigger roles as you go.
2. 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.
Apply directly here: https://celtra.com/careers/openings/#op-709855-software-developer-data-data-engineering-team
Klasifikacija delovnega mesta Lokacija: Ljubljana / Remote Plačilo: 3000-6000 EUR / mesec Delovni čas: redna zaposlitevZahtevana znanjaSQL, data modeling, data pipelinesnapredno znanjeO podjetju
Celtra is an ad-tech company that develops enterprise software for automating and scaling the production of marketing content. In the past years, Celtra has built two world-class products, Creative Enablement (CE) & Creative Automation (CA).
Creative Enablement is already a growing market leader for a couple of years, helping companies such as CNN, TripAdvisor, Bloomberg, NBCU, ... to enable creativity and improve the quality of their advertising inventory. Our technology enables customers to generate and serve thousands of ads in seconds. Celtra's younger CA product is chasing a much bigger opportunity by helping brands make content creation better, faster, and more efficient. It is still in the early days of development and lots of features need to be developed, but it already has an impressive list of customers such as Spotify, adidas, Shopify, Unilever, P&G Lululemon.
Our global team is a collection of talented individuals with unique backgrounds but in Ljubljana we are mostly focusing our efforts on building and growing a talented and innovative product development team. A lot has happened since Celtra launched its first creative software in 2010. Yet there is one thing that has remained constant: our passion to build software that makes content creation better, faster, and more efficient.At Celtra the end goal is to build great and quality products and make our users' life easier. We are on a journey to create something new in the creative technology space.