Senior Backend Engineer (Outside IR35) in London

Senior Backend Engineer (Outside IR35) in London

London Freelance 50000 - 70000 £ / year (est.) No working from home possible
United States Digital Space LLC

At a Glance

  • Tasks: Transform legacy data into actionable insights and build custom data pipelines.
  • Company: Innovative startup reimagining software for blue collar industries.
  • Benefits: Competitive daily rate, flexible work environment, and opportunity to shape modern data infrastructure.
  • Other info: Fast-paced startup culture with high autonomy and growth potential.
  • Why this job: Join a passionate team and make a real-world impact with cutting-edge technology.
  • Qualifications: 6+ years backend experience, deep Python skills, and a builder's mindset.

The predicted salary is between 50000 - 70000 £ per year.

We are looking for a Senior Backend Engineer to join an early stage team that is actively reimagining software for an industry tech forgot. For decades, blue collar businesses have powered the backbone of everyday life while relying on fractured, legacy infrastructure. They sit on vast amounts of unstructured, highly valuable data locked inside on-prem databases, servers, and CSV dumps. Data that their teams simply don't have the tools to leverage. By pairing modern LLM breakthroughs with reliable backend engineering, our client is changing that, transforming amorphous legacy data into clear, actionable insights for nontechnical teams on the ground.

Working directly alongside AI founders, you won't just write code; you will shape what modern data infrastructure looks like in this space. You'll take full ownership of the backend, building custom data pipelines, orchestrating Airflow style workflows, and turning messy real world inputs into structured data ready for downstream AI models. You'll design APIs, optimise low latency queries, and set the standard for testing, CI/CD, and deployment from scratch.

To thrive here, you’ll need six or more years of backend experience, deep Python expertise, and a proven track record of shipping production ready data pipelines and REST APIs. You don't need niche domain knowledge, but you do need a true builder's mindset: high autonomy, a passion for greenfield engineering, and a track record of thriving in fast-moving startup environments. Familiarity with tools like PostgreSQL, FastAPI, Docker, and GCP/AWS will make you stand out immediately.

If you are an experienced contractor ready to take full ownership of a greenfield stack and help scale a platform with real world impact, submit your profile to set up a conversation.

Senior Backend Engineer (Outside IR35) in London employer: United States Digital Space LLC

United States Digital Space LLC is an exceptional employer, offering a dynamic work culture that prioritises innovation and collaboration in the heart of Greater London. With a strong focus on employee well-being and flexible work options, we provide ample opportunities for professional growth and development, making it an ideal environment for those looking to make a meaningful impact in the field of AI-enabled SaaS engineering.

United States Digital Space LLC

Contact Details:

United States Digital Space LLC Recruitment Team

StudySmarter Expert Advice🤫

We think this is how you could land Senior Backend Engineer (Outside IR35) in London

Make Your Portfolio Shine

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We think you need these skills to ace Senior Backend Engineer (Outside IR35) in London

Backend Engineering
Python
Data Pipeline Development
REST API Design
Airflow
Low Latency Query Optimisation
CI/CD

Some tips for your application 🫡

Showcase Your GitHub Projects:When applying for a freelance software engineering gig at United States Digital Space LLC, make sure to include your GitHub link in your application. Highlighting your code repositories, contributions to Open Source, and any personal projects can really set you apart and give us insight into your skills and coding style.

Tailor Your CV with Relevant Skills:In software development, the specifics matter! Make sure your CV lists the programming languages and technologies you excel at. Focus on the ones that align with the projects United States Digital Space LLC is working on. Listing your tech stack clearly will help us understand how you fit into our team.

Include a Portfolio of Your Work:A solid portfolio is a must when applying for freelance roles. Include links to any apps, websites, or software you've developed. Highlight any projects that reflect a strong user experience, efficiency, or innovative solutions—this is your chance to shine and show us what you can bring to the table!

Mention Your Availability and Rates:Since this is a freelance role, we want to know when you’re available and what your rates are like! Be upfront about your typical work hours and project timelines. This transparency will help us see if we can sync up for future projects at United States Digital Space LLC.

How to prepare for a job interview at United States Digital Space LLC

Showcase Your Code Wizardry

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Understand Their Tech Stack

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