Senior Developer | Haystack

Senior Developer

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Ad Signal

Senior Developer

Competitive

United Kingdom

Fully remote

Graduate

Junior

Mid

Senior

Leader

Description

ID: New

We're looking for experienced developers who love solving complex problems and building new, innovative systems. You’ll work on challenging projects around video/audio processing, data deduplication, and real-time streaming — using the best tools for the job. What You'll Do: - Design and build scalable, secure, and maintainable applications - Work across multiple languages and frameworks (primarily Ruby on Rails, Python, Rust) - Contribute to both backend and frontend systems - Lead technical decisions and mentor other developers - Handle real-time data streaming and video processing challenges Tech Stack: - Web: Ruby on Rails (primary), Django (or similar) - Video/Image: Python, Rust, OpenCV, FFMPEG - Streaming: Kafka, RabbitMQ, AWS Kinesis - Infrastructure: Kubernetes, observability tools, SRE practices What We’re Looking For: - Strong experience building production systems, end-to-end - Solid CS fundamentals (algorithms, data structures) - Experience with testing, maintainable code design, and scalable architecture - Ability to model complex business logic cleanly - Bonus: experience with low-level languages (C/C++, Rust), and open-source contributions We're also open-source and side-project friendly — as long as it’s not competitive, feel free to keep building what you love.

Role tech stack

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Culture overview

*Ad Signal Values* Honesty, Loyalty, Tenacity, Accountability *Remote-first* We do not have an office - the company was set up this way and this is how we plan for it to stay. All of our employees are all over the UK and we use the plethora of online tools (and the Google suite) to manage our day and comms. *Flexible working* Although we have core hours, we try to be as flexible as possible with other responsibilities you may have, such as the school run. If you need to be away from your computer at certain times each day please let us know and we will plan around it. If you need to be away as something comes up, please just give us as much notice as possible. There’s a Slack channel called #info-in-out; if you’re going to be away from your desk please let us know in this channel AND a rough eta for your return, so we’re not chasing you unnecessarily. *Please chat nonsense* We have no kitchen or water cooler to gather around and chat about our weekend, hobbies or personal lives; so please feel free to chat about whatever you like in Slack or while pairing. You’re not going to be criticised for talking with the team a healthy amount (which is quite a lot), in fact, it’s crucial to our culture; otherwise it will become a silent, sterile place to work, which is not what we want. *Quarterly Meetups* These will be both for team building and fun, and for whiteboarding and other planning. We’ll give plenty of notice beforehand and, since your home is your primary place of work, we will pay for any travel or accommodation. *Share options* We have set aside 10% of the company as share options to be divided amongst our employees. The exact number of shares, and their percentage value of the total company will be set during your interview.

Employee benefits

Enhanced parental leave

Flexible Working

Laptop

Learning Allowance

Pension

Private Healthcare

Share Options

Office vibe

Remote-first

Team Building Days

Location

Tech at

Ad Signal

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Leadership

Anson KellyCTO

Tech overview

Our products are focused around providing tools to help clients better manage video collections. We use well supported tools to deliver our products, using Ruby on Rails for web based behaviour paired with Python+Rust for lower level processing of video, audio and image files. Our deployment environment is kubernetes based to leverage existing solutions and to have a degree of portability

Engineering principles

Agile Process

Code Reviews

Communication and collaboration

Continuous delivery

Infrastructure as code

Monitoring and logging

Pair programming

Test Driven Development

Company tech stack