Software Developer Back End

M&C Saatchi Group; City Of London; Hybrid; GBP 45,000 - 60,000; Full time

Job summary

A global communications firm in London is seeking a Software Developer Back End to design and operate scalable APIs and data systems. This hybrid role involves leading small engineering teams, developing ETL pipelines, and optimizing API performance. Applicants should be experienced in Python, FastAPI, and AWS. A competitive salary with various benefits is offered.

Benefits

27 days holiday per year

Pension contributions

Private healthcare

Emergency care days

Volunteering leave

Cultural stimulation allowance

Thursday drinks

Season Ticket loan

Qualifications

• Strong experience with Python and production FastAPI services.
• Proficient in SQL, including schema design and query performance tuning.
• Familiar with data science tools like Pandas, NumPy, and Jupyter.
• Hands-on expertise with various AWS services.
• Experience in building customer-facing REST APIs and data ingestion pipelines.

Responsibilities

• Design, build, and operate Python/FastAPI-based API services on AWS.
• Develop and optimize ETL pipelines and automation workflows.
• Provide technical leadership and mentorship within the team.
• Ensure best practices in CI/CD and containerized deployments.

Skills

Python

FastAPI

SQL

AWS

Data Science Tools

CI/CD

Docker

Tools

Lambda

ECS

S3

RDS

DynamoDB

Terraform

CloudFormation

Airflow

dbt

Job description

Overview

We are looking for a Software Developer Back End to join one of the M+C Saatchi Group's specialist divisions, M+C Saatchi World Services. This division partners with governments, civil society, foundations, academia, and the private sector to work on critical issues including the climate emergency, national security, social justice, conflict prevention, and sustainable development. We provide a fully integrated, end-to-end service, combining multi-discipline communications teams with subject matter experts, across the world. Our work is domestic and global, often affecting the most vulnerable in society, with international activity oriented towards conflict affected or developing countries.

This full-time role is based in the London office on a hybrid basis.

About the Role

We're looking for a Back End Developer to design and operate scalable APIs and data systems on AWS. You’ll lead a small team of engineers delivering customer-facing APIs and robust ETL data ingestion pipelines.

Key Responsibilities

• Design, build, and operate Python/FastAPI-based API services deployed on AWS ECS
• Develop and optimize ETL pipelines and automation workflows for reliable data ingestion
• Own API design, performance optimization, security, and observability
• Provide technical leadership and mentorship; coordinate delivery with product and data teams
• Ensure best practices in CI/CD, infrastructure-as-code, and containerized deployments

About You

Requirements:

• Strong experience with Python and production FastAPI services
• Proficient in SQL (schema design, query performance tuning)
• Familiar with data science tools such as Pandas, NumPy, and Jupyter
• Hands-on expertise with AWS services: Lambda, ECS, S3, RDS/DynamoDB, IAM
• Experience building customer-facing REST APIs and data ingestion pipelines
• Demonstrated leadership and mentoring ability in small engineering teams
• Practical experience with CI/CD, Infrastructure as Code, Airflow/dbt, and Docker containerization

Technical Skills

• Programming & Frameworks: Python, FastAPI
• Databases & SQL: Schema design, query optimization, RDS, DynamoDB
• Data Engineering: ETL pipeline development, workflow automation, Airflow, dbt
• Data Science Tools: Pandas, NumPy, Jupyter
• Cloud & Infrastructure (AWS): ECS, Lambda, S3, RDS, DynamoDB, IAM
• DevOps & CI/CD: Infrastructure as Code (e.g., Terraform/CloudFormation), CI/CD pipelines, Docker containerization
• APIs: REST API design, performance optimization, security, observability
• Team Leadership: Technical mentoring, delivery coordination with product/data partners

Applications close

Applications close: Wednesday 22 October 2025. No Recruiters.

What We Offer

A competitive salary and benefits package that includes 27 days holiday per year, pension contributions, private healthcare, discounted dental insurance, enhanced maternity/parental leave, plus a whole host of others including:

• Cultural stimulation allowance - £250 per person per year
• Half days off before bank holidays
• Emergency care days for dependants
• Up to 5 days volunteering leave per year to work for a registered charity
• Up to 10 days special emergency leave per year
• Season Ticket loan
• Payroll Giving Scheme
• Thursday drinks to unwind and socialize
• An annual Summer and Christmas party
• Our commitment to Diversity and Inclusion sees us offer inclusive bank holidays

We also offer learning opportunities around D&I, targeted mentoring programmes and the opportunity to participate in several active Employee Led Networks and associated events. Finally, this role will be supported with all the necessary personal development required to set someone up for success.

Equality & Compliance

M+C SAATCHI GROUP has pledged its commitment to create a company that values difference, with an inclusive culture. As part of this, M&C Saatchi Group continues to be an Equal Opportunity Employer which does not and shall not discriminate, celebrates diversity and bases all hiring and promotion decisions solely on merit, without regard for any personal characteristics.

All employee and candidate information is kept confidential according to General Data Protection Regulation (GDPR).

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