Senior Data Engineer Gdańsk, Kraków, Warszawa B2B 1 100 – 1 550 PLN/day

Why choose this offer?

• Work on modern cloud security architecture for large-scale financial data platforms in the capital markets domain
• Opportunity to shape security-by-design practices in a highly regulated, data-driven environment
• Join an international organization processing high volumes of transactional data, supporting advanced analytics and trading platforms
• The Jit communitywill bring you a nice time during regular integration meetings
• Enjoywork-life balancein a company that values flexibility and innovation

Project

We are looking for a hands‑on Senior Data Engineer to take ownership of a Snowflake‑based data platform, consolidate existing solutions into one stable platform, and support its further development. You will build and maintain data pipelines, data models and Power BI reporting, ensuring data quality, security and governance while working independently.

Expected competences and knowledge

• Fluent, professional English (written and spoken).
• Experience in financial services, trading or fintech.
• Extensive hands‑on data engineering experience, including end‑to‑end ownership of at least two production data platforms.
• Proven ability to remain hands‑on, writing code and independently organising and delivering work.
• Experience with long‑term engagements (at least 2 years per engagement).
• Availability to work full‑time during UK business hours, including support for critical data feeds, and willingness to travel to London regularly for short visits.
• Strong production experience with Snowflake as the primary data platform, including warehouse/lakehouse design, sizing, clustering, query profiling, cost optimisation, role‑based access control and masking policies.
• Expert SQL skills, including Snowflake query optimisation and dimensional data modelling (star and snowflake schemas).
• At least 2 years of production experience with dbt, including sources, snapshots, tests, macros, exposures, medallion architecture (Bronze, Silver, Gold) and CI/CD.
• At least 3 years of production experience with Power BI, including expert DAX, Power Query / M, Tabular Editor, DAX Studio, semantic models, RLS/OLS and incremental refresh.
• Working knowledge of AWS for data workloads (S3, ECS/Fargate or Lambda, CDC/replication and IAM), as well as Python.
• Experience with data quality monitoring and alerting, data governance, security and PII protection in line with FCA and GDPR requirements.

Nice to have

• Experience with regulatory data, particularly client money, capital and reconciliations.
• Ability to translate business objectives into functional and non‑functional requirements and platform architecture.
• Experience with Terraform, Git / GitHub Actions, Airflow or Dagster.
• Knowledge of Microsoft Fabric or Snowflake Cortex.

Responsibilities you’ll have

• Take end‑to‑end ownership of the existing Snowflake data platform and the partially developed new platform.
• Consolidate both platforms into one coherent, stable solution supporting all business departments.
• Develop, maintain and optimise production data pipelines using Snowflake, dbt, SQL, Python and AWS.
• Design and implement scalable data models and Snowflake warehouse architecture.
• Develop and maintain Power BI reports, semantic models and advanced DAX solutions.
• Monitor data quality, pipeline performance, warehouse utilisation and platform costs.
• Implement data governance, security controls, access management and PII protection.
• Work closely with Finance, Risk and other business departments to understand data requirements.
• Collaborate with the infrastructure engineer on AWS‑based data workloads.
• Contribute to the Data Working Group and continuously improve platform architecture and engineering practices.

Technologies you’ll work with

• Snowflake
• dbt
• SQL
• Python
• Power BI
• DAX
• Power Query / M
• Tabular Editor
• DAX Studio
• AWS S3
• AWS ECS / Fargate
• AWS Lambda
• AWS IAM
• CDC / Data Replication
• CI/CD
• Data Governance
• RLS / OLS

Client – why choose this particular client from the Jit portfolio?

Our client is an international financial services organization operating in the capital markets domain, focused on processing and analyzing large volumes of transactional data. The company develops modern data platforms that support trading, operational efficiency, and regulatory reporting. It operates in a fast‑paced, highly regulated environment with a strong emphasis on scalability, data quality, and advanced analytics.

About Jit Team

The Human Factor of IT – it’s not just a slogan, it’s a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 770 experienced experts, to whom we offer developmental projects, a wide range of benefits, and a proprietary professional development programme. Together with clients from around the world, we create innovative IT solutions delivered by highly specialised and efficient teams.

Behind our maxim are also charitable and educational activities. We support schools, universities, and educational institutions by conducting workshops, running educational projects, sponsoring events, and donating learning equipment. We offer internships that help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We also support numerous charitable organisations helping people in need, children, and the elderly. We are a Polish company and we share what we have achieved over more than 15 years of activity. By supporting local initiatives, we contribute to the circulation of good energy.

Here’s how we get from first “hello”
to “welcome aboard”

You’ll meet with our HR team to discuss your experience, approach to software development, and teamwork. We’ll also verify your English language proficiency as part of the conversation. Then, you’ll take part in atechnical interview focused on your skills and problem‑solving mindset.

We believe agreat workplace is more than aset of benefits. It’s about trust, long‑term relationships, and an environment where people can do their best work.

Share and gain experience. Jit Academy is aplatform serving amutual knowledge exchange. Lecture others and share your expertise or join the audience.

Jit Communities

Join the group of experts. We ensure constant growth, that’s why we keep building communities dedicated to mutual education.

Growth support

We value people who are looking to develop their skillset. We proudly finance avariety of courses and certifications so that you can gain new competencies.

Jit Summer Office

Gain access to the office located at the very beach in Chałupy. Jit Trailer awaits visits of the team members and their families.

Jit Boats

Cruise the bay thanks to the motorboat awaiting at the Yacht Park in Gdynia. Furthermore, there is afleet of jet skis and kites located at the beach in Chałupy.

Start the day without haste.
At Jit, we begin and finish the day of work within acertain time frame, in stead of fixed hours.

Bonuses for content creators

We provide bonuses to those willing to participate in industry events as public speakers, and to content creators writing articles for our blog.

Mental health support

Mental health is fundamental. Take advantage of psychologists and psychotherapists’ support and reach for psychoeducational content on the wellbeing platform

We provide our teams with high-quality gear necessary to work. Choose between MacOs or Windows and work the way you prefer.

Teambuilding events

Meet new, interesting people. We’re dedicated to building human relations and often host informal events that bound our team members.

Classes conducted for small groups, lectured
by our teachers, guarantee rapid results.

Take care of your wellbeing. Members of Jit Team, gain access to awide range of medical plans provided by Medicover or PZU.

We provide Multisport and Medicover Sport gym cards so that you can improve your physical condition.

Life insurance

Increase your safety. No matter the form of employment, we provide life insurance plans to our colleagues.

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still wanna be apart of The Team?

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