Client Success Executive - Programmatic Ad Technology - Account Management/Customer Success Ref: 3952 Date Posted: Wednesday 12 Aug 2026 I’m working with a brilliant, fast-growing AdTech start-up who are looking for a Junior Client Success Executive to join them on a short-term contract. This is a great opportunity for someone looking to get some real hands-on experience early in their career – no previous AdTech or Client Success experience needed. They’re looking for someone who is: Bright, enthusiastic and keen to learn A confident written communicator Organised and quick to pick things up Comfortable with Gmail, Google Sheets and AI tools Happy to get stuck in and use their initiative You’ll be supporting their Client Success team, communicating with clients over email and helping coordinate the delivery of live digital advertising campaigns. £140 per day Inside IR35 Around 6 weeks initially Starting ASAP London / Borough Market – ideally 1-2 days in the office, but UK remote considered Perfect for a recent grad or someone at the very beginning of their career who wants exposure to Client Success, AdTech and life inside a growing start-up.