M
Software Engineer - Data team
Contract type
Freelance
Work mode
Remote · Poland
Experience
3 years
Job description
A fully remote contract role on Masabi's small Data team, building and running services that ingest Kafka topics into Apache Iceberg tables on AWS as part of a new governed lakehouse data platform.
At a glance
- Employment
- Contract · Independent contractor
- Work mode
- Remote · Poland
- Languages
- English
What you'll do
- Build and run the services that ingest Kafka topics into Apache Iceberg tables on AWS, including partitioning, compaction, deduplication and backfills of historical data
- Write clean, well-tested, maintainable code, using AI tools with good judgement, and contribute to code reviews and shared engineering standards
- Work with the teams that produce the data on data contracts, including Avro schemas with field-level classification, schema evolution rules and the CI checks that enforce them
- Build privacy and access into the platform: personal data erasure, retention and per-agency access control
- Build the query layer behind the customer-facing data API, and give others access through Athena
- Evaluate technical approaches, measure performance and cost, and document the choices you make
- Migrate existing dashboards, reports and finance extracts onto the new platform
- Later, build the curated layer of shared metrics and business-ready datasets for BI tools and an AI analytics assistant
What we're looking for
- Solid software engineering fundamentals: you write production code, test it properly and work comfortably with Git and CI pipelines
- AI fluency: you use AI coding tools daily and check their output carefully, especially for SQL, schema changes and anything that affects data correctness
- Good SQL and some experience building or running data pipelines, so you're comfortable working with data from source to query
- A solid grasp of data modelling
- Clear, confident communication in written and spoken English
Nice to have
- Experience running a lakehouse or data warehouse in production
- Production experience with Kafka and schemas (ideally Avro)
- Experience handling personal data, including privacy, retention and access control
- You're comfortable making design decisions and explaining the trade-offs, in writing as well as in conversation
- You enjoy working closely with the teams that produce the data, not just the ones that use it
- JVM experience (Kotlin or Java), Apache Iceberg, Terraform, AWS Lake Formation, DuckDB
Your team
Data team
A small Data team of software engineers who design as well as build: choosing approaches, measuring performance and cost, and writing their choices down.
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About Masabi
Driving the fare payment revolution
Masabi builds fare collection platforms that allow riders to seamlessly buy and present tickets for public transport either on their mobile phones, from a ticket machine, or even by tapping their bank card to travel.
Mission
To make transit fair and accessible for all.
Key facts
- Fare collection / public transport ticketing technology
- Justride platform is used in over 250 locations globally, including some of the largest cities in the world
- Industry-first mobile ticketing SDK
- Ticketing, validation and payment services already publish events to Kafka
Partners & customers
UberMoovitTransit
What they value
- Driven by Purpose
- Encouraged to Accelerate
- Advancing with Empathy