Remote Senior Backend Engineer - Data Migration & ETL

Dwelly; Greater London; On-site; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Fully remote role

Equity options

Competitive salary

Job summary

Dwelly is seeking a Senior Backend Engineer to build and own Dwelly’s internal Data Migration Platform, connecting to legacy CRMs and orchestrating extraction, validation and safe import into the core platform.

You will design and implement migration workflows, handle messy datasets, and work with cross-functional teams to ensure scalable, auditable migrations with AI-assisted tooling where appropriate.

Qualifications

• Strong backend engineering experience with Python.
• Strong practical SQL skills.
• Experience with data migration, ETL/ELT, data processing, system integrations or internal tools.
• Production experience with FastAPI, Django, Flask or similar.
• Experience integrating with external APIs and third‑party systems.
• Ability to work with messy, inconsistent or poorly documented datasets.
• Good understanding of data modelling, mapping, validation, deduplication and safe import patterns.
• Good understanding of database transactions, data consistency and production data workflows.
• Experience with Linux, Docker and containerised development.
• Practical experience using AI coding tools and/or LLM APIs.
• Strong ownership mindset and ability to deliver independently under ambiguity.
• Clear communication and ability to work closely with non‑engineering stakeholders.

Responsibilities

• Build an application that connects to external CRM systems used by acquired agencies, extracts relevant data, and prepares it for migration into Dwelly.
• Work with APIs, exports, files, databases and poorly documented legacy systems.
• Design workflows for cleaning, mapping, normalising, deduplicating, and validating complex CRM data before it enters Dwelly's core platform.
• Build safe import flows with retries, audit logs, dry runs, error handling and manual review where needed.
• Work with entities such as landlords, tenants, properties, tenancies, payments and maintenance records.
• Use LLM APIs pragmatically for schema mapping, data classification, entity matching, exception triage and quality checks.
• Own the platform end to end: architecture, implementation, testing, deployment and production support.
• Work closely with engineering, product, operations and integration teams.

Skills

Python

SQL

ETL

ELT

FastAPI

Django

Flask

APIs

Data modelling

Deduplication

LLM APIs

Tools

Linux

Docker

CI/CD

Observability

Monitoring

Job description

Dwelly is seeking a Senior Backend Engineer to build and own Dwelly’s internal Data Migration Platform, connecting to legacy CRMs and orchestrating extraction, validation and safe import into the core platform.

You will design and implement migration workflows, handle messy datasets, and work with cross-functional teams to ensure scalable, auditable migrations with AI-assisted tooling where appropriate.