Application Database Engineer

We’re Capital on Tap. Capital on Tap was founded with the mission to help small business owners and make their lives easier. Today, we provide an all-in-one business credit card & spend management platform that helps business owners save time and money. Capital on Tap proudly serves over 200,000 businesses across the world and our goal is to help 1 million small businesses by 2030.

Why Join Us? We empower you to be innovative and solve complex problems. Take ownership, make an impact, and thrive in our scaling and agile environment.

This is a Hybrid role, 2 days per week in our London office.

Team

Team at Capital on Tap

Role Overview

As a Database Engineer at Capital on Tap, you will be more than just a technical expert; you will be a champion for data-tier excellence and a pivotal partner to our engineering teams. This role is for a specialist who is passionate about the performance, scalability, and integrity of our core database systems, including SQL Server, and is eager to expand their expertise into technologies like MongoDB and Azure. You will be the go-to ambassador for all things database-related, using your exceptional communication skills to guide, influence, and elevate our approach to data across the entire technical organisation.

What You’ll Be Doing

• Proactively hunt down, analyse, and eliminate inefficient queries and database operations to ensure our systems run at peak performance.
• Own the delivery of reliable and scalable database solutions, from crafting indexing strategies to fine-tuning configurations.
• Be an active voice in sprint cycles, assisting with the planning and estimation of all data-related tasks.
• Design, build, and maintain robust and scalable database schemas for our critical OLTP systems.
• Play a key role in architectural decisions, bringing your expert perspective on data storage, access patterns, and security.
• Act as a forward-thinker, evaluating and championing modern design patterns for our data tier to ensure its long-term health and integrity.
• Establish and champion the standards for high-quality, efficient data access, becoming the trusted guide for engineering best practices.
• Review SQL generated by ORMs like Entity Framework, partnering with engineers to provide constructive feedback that prevents performance bottlenecks before they start.
• Identify and advocate for refactoring data-related technical debt, making a clear case for improvement.
• Serve as a dedicated database expert and partner for our Software Engineers, empowering them to build applications that interact with data flawlessly.
• Communicate complex database concepts and performance trade-offs to both technical and non-technical stakeholders across Product, QA, and SRE teams.
• Work across teams to ensure all data-tier requirements are understood, prioritized, and effectively met.
• Experience in an imperative programming or scripting language such as C# and PowerShell.
• Performance tuning using Query Store, Extended Events, Server Audit, and execution plans.
• Database design including PDM, LDM, CDM with relational and non-relational data structures.
• Experience in a cloud environment.
• .NET, Entity Framework or other ORM.
• Powershell as a core automation language.
• Terraform and YAML.
• Other database technologies (NoSQL).
• DataDog or equivalent monitoring.

Diversity & Inclusion

We welcome, consider and encourage applications from anyone who shares our commitment to inclusivity. Join us in creating a space where authenticity thrives, and everyone can do their best work.

Benefits

Great Work Deserves Great Perks. We mix a fun office culture with strong benefits, including private healthcare (dental and optician services), worldwide travel insurance, anniversary rewards, pension scheme, grant programs, 28 days holiday (plus bank holidays), annual learning and wellbeing budget, enhanced parental leave, Cycle to Work, Season Ticket Loan, therapy support, dog-friendly offices, and free drinks and snacks. For more details, see our benefits information on the careers page.

Interview Process

First stage: 30 minute intro and values call with Talent Partner (Video call)

Second stage: 45 minute CV overview with Team Manager (Video call)

Final stage: 60 minute technical assessment with Head of Department (In person)

Next Steps

Excited to work here? Apply! We aim to respond within 3 working days (up to 5 days during busy periods).

Note: This description focuses on role responsibilities, qualifications, and the company’s diversity and benefits. Applications should be submitted through the official careers channel.