Senior Data Engineer

Sand Technologies build data-intensive systems that enable insight, intelligence, and informed decision-making. We typically work with hybrid data architectures with centralised lakehouses or data warehouses and distributed data products on top. Our stack includes tools such as Databricks, dbt, Docker, Python, SQL, and PySpark.

We primarily work in cloud-native environments across AWS, Azure, and GCP, while occasionally supporting self-hosted open-source deployments.

A Senior Data Engineer is responsible for designing, building, and maintaining scalable data architecture that underpins our decision-support applications. Our decision-support applications range from traditional Analytics (data warehouse), to Machine Learning, to Digital Twins and on occasion serving LLMs and Agentic workflows, and as such your data architecture should support various use cases.

You will work closely with cross-functional teams and contribute to the strategic direction of our data initiatives.

We operate with a strong code-first, "data as a product" mindset, where testing, reliability, observability, and performance are non-negotiable.

- Architect and build a secure, scalable urban data platform integrating multi-agency and infrastructure datasets at scale.

- Design resilient cloud-native architectures supporting batch, streaming, and near-real-time operational workloads.

- Lead development of high-performance ingestion and transformation pipelines across legacy systems, APIs, IoT/telemetry, and structured data sources.

- Implement distributed and event-driven processing systems (e.g., Spark, Kafka or equivalent) for large-scale analytical and operational use cases.

- Establish platform reliability standards, including observability, automated data quality validation, lineage, monitoring, and defined SLAs/SLOs.

- Design and enforce strong data governance and access control frameworks, including RBAC, encryption, auditability, and secure data handling practices.

- Build modern lakehouse or equivalent architectures that enable advanced analytics, GIS, and production-grade machine learning.

- Partner closely with data scientists, ML engineers, and senior stakeholders to operationalize AI and analytics at scale.

- Optimize platform performance, scalability, and cost efficiency as adoption grows.

- Contribute to long-term architectural direction and mentor engineering team members.

- 6+ years designing and operating large-scale semi-distributed data platforms (hybrid centralised and distributed) in cloud or hybrid environments.

- Proven experience architecting modern data systems (lakehouse, data mesh, or equivalent) supporting both analytical (descriptive and predictive) and operational workloads.

- Deep hands-on expertise with distributed processing frameworks (e.g., Spark) and streaming/event systems (e.g., Kafka or similar).

- Strong experience building secure, governed data environments with robust access controls, encryption, lineage, and audit capabilities.

- Experience designing secure data platforms in regulated or government environments, with strong understanding of compliance, auditability, and data protection standards.

- Experience integrating heterogeneous data sources, including legacy systems, APIs, telemetry/IoT systems, and relational databases.

- Demonstrated ability to design highly available, observable, production-grade data systems.

- Experience enabling machine learning and advanced analytics through robust data infrastructure and feature pipelines.

- Strong proficiency in Python, SQL, and ideally DBT with a track record of writing clean, production-quality code.

- Experience deploying and operating solutions in AWS, Azure, or GCP, including CI/CD and infrastructure-as-code is beneficial.

- Ability to operate effectively in complex, multi-stakeholder environments.

- Strong systems-thinking mindset with a focus on scalability, modularity, and long-term platform evolution.

- Experience designing data platforms in U.S. public sector or highly regulated environments, with working knowledge of applicable federal and state data privacy and security requirements (e.g., HIPAA, CJIS, FERPA, state-level privacy acts), and the ability to embed compliance, auditability, and data governance principles into architectural design.

This role is not a remote position. We would require our Senior Data Engineer to be able to travel to client sites in Baltimore 4 days a week.

- Client Centricity & Integrity: We let Our Clients Run the Company, Surf Like Yvon to stay true to our values, and Play the Long Game with integrity.

- Collaboration and Inclusion: We live by Each One, Teach Ten and ensure Everybody is Welcome.

- Operational Excellence and Simplicity: We K.I.S.S. by keeping things simple while always striving to Raise the Bar.

- Action, Ownership, and Execution: We Decide, Get Stuff Done, and Do Hard Things with accountability.

- Growth, Innovation, and Resilience: We Choose Growth, Pioneer boldly, and remember There is No Failure.

Due to the considerable amount of virtual work and interaction with colleagues and customers in different physical locations internationally, it is essential that the successful applicant has the drive and ethic to succeed in working in small teams physically but in larger efforts virtually. Self-drive to communicate constantly using web collaboration and video conferencing is essential.