Mid-level Software Engineer

Mid-level Software Engineer

Full-Time 63000 - 77000 £ / year (est.) No working from home possible
United States Digital Space LLC

At a Glance

  • Tasks: Design and maintain automation frameworks for Connected TV, collaborating with a dynamic team.
  • Company: Join an innovative tech company focused on quality engineering and real-world impact.
  • Benefits: Enjoy 35 days of leave, profit sharing, health insurance, and flexible start times.
  • Other info: Mentorship opportunities, regular training, and a culture of diversity and inclusion.
  • Why this job: Make a difference in the world of Connected TV while growing your skills and career.
  • Qualifications: 2+ years in test automation, strong TypeScript/Python skills, and a passion for teamwork.

The predicted salary is between 63000 - 77000 £ per year.

  • *Build the future of Test Automation for Connected TV*
  • Role

We’re looking for a Mid-level Software Developer in Test to join our Quality Engineering team at the company.

This is a hands-on role for a genuinely self-driven engineer who cares deeply about the work they do and loves being part of a team.

You’ll take ownership of meaningful pieces of our automation platform, work closely with senior engineers, and start coaching more junior members of the team.

The role involves extensive work with CI pipelines running on real Connected TV devices — no prior TV experience required, we’ll teach you everything you need.

The successful candidate will be based full-time at our London office.

What We Offer

  • A dynamic, fast-paced environment where innovation is at the heart of everything we do.
  • The opportunity to work on real-world projects that impact Connected TV users across the globe.
  • Ownership of substantial pieces of our automation platform.
  • Structured mentoring from senior engineers, and the chance to mentor juniors and interns in turn.
  • A platform to take your ideas from inception to implementation.
  • Lab-based work and continued investment in your learning and development.

About You

  • You’re a self-starter. You take an idea, run with it, and check in when it’s useful — not because you need someone to tell you what to do next.
  • You genuinely care about the work you produce. 'Good enough' on your own output isn’t good enough for you.
  • You’re passionate about teamwork. You enjoy pairing, reviewing, and getting the best out of the people around you.
  • You have solid hands‑on experience in test automation and want to deepen it.
  • You write clean, well‑documented code and care about quality — your own, and your team’s.
  • You’re curious about new technologies and keen to work out where they fit.
  • You like to build things and you’re energised by seeing your work in production.
  • You communicate clearly with engineers, product, and non‑technical stakeholders.

Responsibilities

  • Design, build and maintain automation frameworks and tooling, with guidance from senior engineers on larger architectural decisions.
  • Own pieces of our CI pipelines — configuring, maintaining, diagnosing and fixing issues.
  • Contribute across the full test lifecycle: requirement analysis, test planning, execution, defect capture and reporting.
  • Write and review code, upholding our quality and documentation standards.
  • Investigate and triage failures, including intermittent ones, and drive them to resolution.
  • Mentor junior engineers and interns through pairing, code review and informal coaching.
  • Report and prioritise bugs; communicate clearly with internal and external stakeholders.
  • Contribute to test strategy conversations on your projects.
  • Research new tools, frameworks and approaches, and share what you learn with the team.

Qualifications

  • 2+ years of professional experience in test automation, SDET or equivalent software engineering roles.
  • Strong working knowledge of Type Script and/or Python, and at least one modern test framework (Playwright, Cypress, Webdriver IO, or similar).
  • Good understanding of Node. js and Java Script, and comfort with bash scripting.
  • Working knowledge of CI/CD principles and tools such as Docker, Git Hub Actions / Git Lab CI, or equivalent.
  • Experience with Agile/Scrum development processes and associated tools (Jira).
  • Solid documentation skills and the ability to explain technical concepts clearly.
  • A track record of taking ownership of non‑trivial pieces of work and delivering them.

Desirable

  • Experience with micro services.
  • Some experience with performance, accessibility or security testing.
  • Cloud platform experience (AWS, GCP, Azure).
  • Prior experience mentoring junior engineers or interns.
  • Experience with Infrastructure as Code (Ia C) and configuration management tools such as Terraform, Cloud Formation, or Ansible, enabling automated provisioning, configuration, and maintenance of scalable test environments.

Why Work at FX?

  • Annual profit share distributed equally across all roles and departments.
  • Pension contributions with Scottish Widows.
  • Generous 35 days of annual leave, including bank holidays and Christmas office shutdown.
  • Monthly one‑on‑one Sanctus mental health coaching session.
  • Optional Vitality Health Insurance with discounted Apple Watch, cinema tickets, and Amazon Prime.
  • Cycle‑to‑work scheme with up to 47% savings on a new bike.
  • Flexi start time between 9am and 10am.
  • Employee referral scheme.
  • Regular appraisals for feedback and growth.
  • Weekly dedicated training time for personal development.
  • Collaborate with prestigious global brands in media, sports, and entertainment.
  • We take great pride in our culture of acceptance, diversity and inclusion.
  • Complete regular surveys to provide anonymous feedback on the business, leadership team and your role to ensure that we are doing everything we can to keep improving and making FX a great place to work.
  • Join us at our monthly Show and Tell, where team members update us on what they’ve been working on.
  • Get nominated for the monthly FX Factor by your peers and get recognised for your contribution to the business.
  • Get a chance to earn a £20 voucher for high project NPS scores.
  • Mac Book Pro on your first day at FX

This is a full‑time role based out of our office in Old Street, London. We can only consider applicants who are able to work 5 days per week from the office.

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Mid-level Software Engineer 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 Mid-level Software Engineer

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Contribute to Open Source Projects

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We think you need these skills to ace Mid-level Software Engineer

Test Automation
TypeScript
Python
Modern Test Frameworks (Playwright, Cypress, WebdriverIO)
Node.js
JavaScript
Bash Scripting

Some tips for your application 🫡

Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.

Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at United States Digital Space LLC.

Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at United States Digital Space LLC and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!

Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!

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

Brush Up on Your Coding Skills

For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.

Know Your Tools and Frameworks

Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If United States Digital Space LLC uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.

Showcase Your Projects

Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.

Prepare for Behavioural Questions

While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.