About Antti
Well-rounded, collaborative, and product driven backend/full-stack engineer with expertise in data systems, cloud infrastructure, and CI/CD. Proven ability to lead complex projects from PoC to production, improve efficiency, and deliver savings.
English
Native or bilingual
Finnish
Native or bilingual
German
Fluent
Spanish
Basic
Can work on-site
Barcelona (up to 50km)
Experience
- FreelanceFreelance DeveloperDecember 2025 - Today (6 months)- Completed diverse data annotation projects to train LLMs for coding. Work entailed understanding a completed PR in open source repository and writing clear instructions for LLM to solve the task.- Delivered PoC of customer portal for a mid-size accounting company.
- Zurich Livewell BarcelonaSenior Python DeveloperAugust 2024 - December 2025 (1 year and 4 months)• • Designed and implemented novel system for cheat detection among application users, replacing time consuming and frail manual process. [Python, AWS Serverless]• • Managed design and delivery of event-driven core system to replace fnicky legacy system. Lucid design, API contracts, and documentation improved maintainability and onboarding time. [DynamoDB, GraphQL, Redis]• • Initiated and planned data platform migration to Iceberg. Job execution time dropped from ~12 h to ~20 min saving up to 10 000 € / year and enabled up-to-minute data warehouse. [AWS Glue]• • Developed strategy to auto-adapt lambdas to actual load, improving performance and cost savings of ~20%.• • Drove migration from SEED to Github Actions to fulfll security requirements and future proof deployments.
- Nautilus LabsSoftware Engineer I+IIOctober 2021 - January 2024 (2 years and 3 months)New York, NY, USA• • As precomputation lead, managed project delivery to largest client. Adoption resulted in web dashboard load time drop from ~20 s to ~3 s and resolved tech debt causing critical incidents. [Go + Postgres]• • Spearheaded a data quality initiative to build trust in precompute and ensure project completion. [Pandas]• • Designed and led implementation of backfll system for precomputed data. [Python + Github Actions]• • Developed ETL pipeline components and framework. Identifed and fxed bottlenecks impacting system stability, resulting in $20,000 in annual infrastructure savings. [RabbitMQ + Python + Numpy]• • Mapped current data consumption patterns and delivered feature data pipeline POC. [Snowfake + DataDog]• • Developed POC and delivered an agent based auth system unlocking required RBAC capabilities. [OPA]• • Built public API for customers to access their own data, deploying agent based auth as middleware. [Go + Gin]• • Designed and implemented application and database architecture for MVP of time series data store and processing engine, including containerized e2e testing. [DynamoDB + Python + Cython + Docker]• • Contributed to engineering culture by presenting regularly on topics such as performance and database design.
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Education
- Software Engineering BootcampCodeworksSoftware Engineering Bootcamp
- Certifcate Program in GIS and DesignPRATT InstituteCertifcate Program in GIS and Design