Senior Cloud Software Engineer

Why join S4C?

At S4C, we are passionate about creating a positive, energetic and inclusive working environment that reflects our core values:

At your best, Proud of S4C, Celebrate all, Go for it.

This is an exciting time to join our team as we continue to foster a culture of work that puts people at the heart of the organisation and at a crucial time in S4C's history as we implement our new strategy, S4C - More than a TV channel, and as we implement the 2030 strategy. We are looking for an organised, reliable, hardworking and enthusiastic individual who live to our core values to join our Team.

Job Overview

This role offers a great opportunity for a Senior Platform Engineer who will play a central role in building, maintaining, and improving the infrastructure that underpins S4C's digital services. With a strong focus on AWS, you will work across platform reliability, deployment pipelines, observability, security, partner integrations, and income-generating platform capabilities, supporting the Lead Solutions Architect in delivering a secure, stable, scalable, and cost-effective platform estate that enables S4C's Digital First ambitions.

As S4C continues its transformation into a multi-platform content publisher, digital systems, workflow and content management are at the heart of everything we do within the Product Development Team.

You will report to the Lead Solutions Architect within S4C's Corporate department / Product Development Team.

Other details

Location: Cardiff / Carmarthen / Caernarfon (minimum 2 days in office)

Salary: £62,500.00 per annum

Agreement: Permanent

Working hours: 35.75 per week. Due to the nature of the job, flexibility, including working outside office hours, is expected on some weekends and bank holidays.

Probationary period: 3 months

Holidays: In addition to the statutory bank holiday, you will be entitled to 26 days of holiday. If you are employed part-time you will receive a pro rata portion of the leave.

Pension: Salaried staff are entitled to joining a Group Personal Pension Scheme is subject to the terms of any scheme in existence as amended from time to time. If you are a member of the Group Personal Pension Scheme, S4C will contribute 10% of your basic salary to the Scheme. You are expected to contribute 5%.

Travel: Occasional travel will be part of the job, usually within the United Kingdom

Applications

Applications should be sent by 5pm on Friday 13 November 2026 directly to Pobl@s4c.cymru

We reserve the right to close this vacancy early if a sufficient number of applications are received. Early application is advised.

Interview Date: To be confirmed but likely to be held after w/c 23rd November 2026

We do not accept CVs.

An application submitted in Welsh will not be treated less favourably than an application submitted in English.

As a Senior Cloud Platform Engineer you will be responsible for:

AWS and infrastructure

• Designing, building, and maintaining AWS infrastructure across S4C's digital estate, applying best practices in scalability, cost efficiency, resilience, and security.

• Developing and maintaining infrastructure-as-code to support repeatable, version-controlled, and auditable platform management.

• Identifying and implementing cost optimisation and capacity planning improvements across AWS services and tooling.

• Contributing to the cloud and platform engineering roadmap, bringing technical input on infrastructure improvements, debt reduction, and new capabilities.

• Keeping abreast of AWS developments and evaluating new services or approaches that could benefit S4C's platform.

Platform reliability and operations

• Supporting platform reliability, performance, and availability across S4C's digital services, including S4C Clic, the S4C website, and associated platforms.

• Contributing to release governance, deployment standards, and CI/CD pipelines to support safe, consistent delivery across environments.

• Maintaining and improving observability across the platform estate, including monitoring, logging, alerting, and dashboards.

• Supporting technical incident response and post-incident reviews, contributing to problem management and long-term remediation.

• Maintaining platform security standards, including access control reviews, vulnerability management, patching, and secrets management.

• Ensuring platform services are documented and supportable by the wider team.

• Providing out-of-hours support for critical platform issues as required.

APIs, integrations and discoverability

• Contributing to the technical integration layer for connected TV and streaming platforms, including API development, pipeline work, and partner technical requirements.

• Supporting the development and maintenance of metadata pipelines that underpin S4C's discoverability and content reach across digital and connected TV platforms.

• Working with third-party platform partners and vendors on integration delivery, providing technical input and supporting documentation.

• Keeping up to date with changes in platform partner requirements and technical standards, and feeding relevant impacts into the team.

Media platform and streaming

• Supporting the build, operation, and improvement of live encoding and transcoding workflows for VOD and live content delivery.

• Working with video packaging formats and adaptive bitrate streaming technologies, including HLS, MPEG-DASH, and CMAF.

• Contributing to CDN delivery and troubleshooting playback and streaming issues across platforms.

• Supporting media processing pipelines and asset workflows, including use of AWS Elemental services such as MediaLive, MediaConvert, and MediaPackage.

• Supporting live events and broadcast-critical streaming services, including monitoring, quality assurance, and incident response.

Income-generating platform work

• Contributing to the development and operation of server-side ad insertion capability and other income-generating platform initiatives.

• Supporting the technical delivery of advertising, measurement, and analytics capabilities that enable new commercial opportunities.

• Helping to identify and document infrastructure cost savings and income opportunities to support resource and budget decisions.

Knowledge sharing and collaboration

• Sharing knowledge and expertise with the wider team, including supporting and mentoring junior team members.

• Collaborating closely with the Digital Product Delivery team to ensure platform capabilities meet product requirements.

• Contributing to technical documentation, standards, and engineering processes across the Cloud and Platform Engineering team.

You will succeed in this role if:

You are someone who has:

• Strong hands-on experience with AWS and cloud infrastructure.

• Experience with infrastructure as code, CI/CD and source control.

• Experience supporting production platforms and responding to incidents.

• Knowledge of networking, DNS, TLS, CDNs, IAM and cloud security.

• Experience with monitoring, logging, alerting and observability.

• Scripting or development experience using Python, JavaScript, TypeScript or similar.

• Ability to investigate issues independently and take ownership of technical delivery.

• Experience with live or VOD media processing workflows.

• Understanding of encoding, transcoding, packaging and adaptive bitrate streaming.

• Knowledge of HLS, MPEG-DASH, CMAF and common video and audio codecs.

• Experience troubleshooting streaming, playback or CDN delivery issues.

• Experience with AWS Elemental services such as MediaLive, MediaConvert, MediaPackage and MediaTailor, or equivalent technologies.

• Experience supporting live events or broadcast-critical services.

• Knowledge of SSAI, advertising technology and SCTE signalling.

• Experience within broadcasting, media or connected TV.