Senior AI & Ab Initio Engineer – Fintech AI (Remote UK)

Vamstar; United Kingdom; Hybrid; GBP 120,000 - 180,000; Full time

Job summary

Antler Co in the United Kingdom is seeking a Senior AI & Ab Initio Engineer for fintech-focused data platforms. You will own backend data pipelines, drive Ab Initio deployments, and help migrate workloads to cloud services.

You will design, build, and migrate Ab Initio workflows to AWS Glue/PySpark, write production-grade Python, and implement AI/LLM workflows with observability. This fast-moving role offers remote work with limited on-site days per month and flexible collaboration across

Qualifications

• 7+ years in backend data-heavy development
• Highly proficient in Python
• Production experience with Ab Initio deployments and cloud migrations
• Hands-on experience with large datasets and high-velocity data streams (Kafka, Flink, Spark)
• Strong with pipeline orchestration tools (Airflow, MLflow, or equivalent)
• Solid SQL skills (Postgres, Redshift, or Snowflake) and NoSQL experience (DynamoDB, OpenSearch, Elastic)
• Experience with LLM workflows: RAG architectures, embeddings/vector DBs, prompt engineering, function/tool calling, observability
• Deep understanding of ETL/ELT patterns and data processing at scale

Responsibilities

• Design, build, and migrate Ab Initio workflows to AWS Glue/PySpark
• Write production-grade Python that processes large volumes of data reliably
• Work with AI coding tools (e.g., Claude) to generate PySpark/AWS Glue code and test harnesses
• Own pipeline health: if data is stale or wrong, it's on you
• Work autonomously to project deadlines with minimal hand-holding

Skills

Python

Ab Initio

AWS Glue

PySpark

Kafka

Flink

Spark

Airflow

MLflow

Postgres

Redshift

DynamoDB

OpenSearch

Elastic

LLM workflows

Observability

Tools

AWS Glue

PySpark

Job description

Antler Co in the United Kingdom is seeking a Senior AI & Ab Initio Engineer for fintech-focused data platforms. You will own backend data pipelines, drive Ab Initio deployments, and help migrate workloads to cloud services.

You will design, build, and migrate Ab Initio workflows to AWS Glue/PySpark, write production-grade Python, and implement AI/LLM workflows with observability. This fast-moving role offers remote work with limited on-site days per month and flexible collaboration across