Systems Administrator

Role: Systems Administrator

Reports into: Systems Manager

Contract Type: Full Time, working 7.5 hours per day, 5 days per week

Location: Hybrid, working 3 days a week in our offices based in Old Street, London

About Us

Nothing is clearer to us than the belief that every woman should include strength training in her life to enhance both physical and mental well-being. It’s about building strong bodies and even stronger minds, asserting their right to take up space in the gym, and allowing the spotlight to shine bright on their progress.

To us, strength training represents a determined, goal-oriented mindset and an unwavering work ethic. We don’t wait for success; we create it through hard work and determination. When faced with challenges, we don’t back down; instead, we break through barriers, recognising that true progress lies on the other side.

These are the pillars that form the foundation of Oner Active. We consistently challenge ourselves to create innovative and impactful products, so that you can perform better. With our range of products and innovative approach, we provide a wide variety of colours to ensure that all skin tones genuinely radiate in Oner.

Our Purpose and Mission

We are on a mission to unite and empower women to be the strongest version of themselves through strength training. We want to inspire women to take centre stage in the gym by promoting strength training, which underpins all movement and sport, as a healthy foundation in life.

Our Benefits

• 25 days annual leave + bank holidays, plus the freedom to work from anywhere for up to 4 weeks a year

• 5% employer pension match through our salary sacrifice scheme

• Generous Oner Active discount and regular office sample sales

• Free Evolve You subscription, on us

• Private Healthcare with Vitality, including optical and dental cover

• Monthly wellness allowance and team workout classes to keep you moving

• Annual discretionary bonus scheme

• Family-friendly maternity & paternity policies that actually support you

• Start-up culture - the chance to learn and make a real impact, backed by hands-on management and career mentoring

• Great employee events like our Summer party, Christmas party and team away days

• Healthy office snacks, fresh fruit and a coffee and matcha bar (plus a chocolate cupboard for a sweet treat for the balance)

• Dog-friendly office

About You

As Operations Systems Engineer at Oner Active, you will shape how our technology stack runs as we scale to a £500m global omnichannel brand.

You will own the day to day health, automation, and documentation of our core operational systems. That includes NetSuite ERP, Shopify (B2C), Teamwork Commerce (POS), eCom360 (Proprietary Middleware), 3PL and WMS integrations, and Narvar for returns.

The role is built around three principles. First, automate anything that should not need a human. Second, document everything so both people and AI agents can use it. Third, be the bridge between our operational teams and our external technical partners.

As we open our US Distribution Centre, launch US retail, and complete the NetSuite ERP implementation, you will own end to end testing of new features and integration health across the stack. Once stable, you will keep finding ways to remove friction and unlock the teams that use these tools every day.

You’ll be responsible for:

• Business analysis, requirement definition, and technical scoping for new operational requests.

• Defining operational process flows and mapping data flows across Shopify, eCom360, NetSuite, 3PL, and Teamwork.

• Writing technical specifications and managing the brief between third party partners (SUG, CMG) and internal stakeholders.

• Owning the automation roadmap. Building, maintaining, and monitoring automations that remove recurring manual work.

• Designing and maintaining the AI-queryable knowledge base used by both humans and future agents.

• System Integration Testing (SIT) and User Acceptance Testing (UAT) for major rollouts, including Retail POS, the US DC, and NetSuite.

• Cutover and go-live management.

• Post go-live hypercare and integration health monitoring. The goal is fewer manual interventions over time, not more.

• Native system configuration in NetSuite, Shopify, Teamwork, and the PIM.

• Internal training and onboarding so teams can operate the systems day to day.

What we are looking for:

• You will be the internal subject matter expert for workflows that touch NetSuite, Shopify, Teamwork, the 3PL, or eCom360. People will come to you first when they see something is incorrect, or want to explore ways to make a process easier.

• You will act as the translator between non-technical teams (Merchandising, Ops, Finance, Digital, Retail) in the UK and our external technical partners (the SUG team in Austria, CMG for NetSuite). You will write the briefs, agree the specs, and make sure both sides land on the same outcome.

• You will own automation as a discipline, not as a side project. Where the same manual task happens twice, you will build something to remove it. You will use modern tooling to connect systems, route exceptions, and resolve common integration failures without human intervention.

• You will use AI as a daily tool. That means drafting NetSuite Saved Searches with AI assistance, writing tech specs faster, generating test cases and synthetic data for UAT, and building small internal tools yourself rather than waiting on external developers.

• You will manage end to end testing (SIT and UAT) of new features, including the US 3PL integration, Shopify POS retail rollout, and NetSuite ERP go-live.

• You will build and maintain a modern knowledge base. SOPs that are queryable by AI, Loom videos for any process with a UI, and structured documentation that both operators and future AI agents can use.

• You will configure systems natively where possible: Saved Searches, custom fields, UI tweaks, dashboards, workflows. Routine configuration should not need an external ticket.

• You will provide data and reporting support to Finance and Merchandising. Accurate actuals, dashboards, and ad hoc analysis. AI accelerates this work but does not replace your judgement on it.

You’ll need to have:

• 3 to 5 years in a Tech, Systems, or Internal Tools role at a high-growth e-commerce or DTC business.

• Strong hands-on experience with Shopify, NetSuite ERP, POS and 3PL integrations

• Experience with middleware or integration platforms. Working alongside bespoke routing tools is a major plus.

• Demonstrable AI fluency. You should be able to tell us which AI tools you use day to day, what you have shipped with them, and how they have changed the way you work. Generic awareness is not enough.

• Hands-on experience building automations in n8n, Make, Zapier, or equivalent. Production examples preferred.

• A bias to build. You are happy to spin up a small internal tool yourself rather than wait three weeks for a developer.

• Experience producing AI-queryable documentation and modern knowledge bases in Notion, Loom, or similar.

• Ability to give clear and regular updates to leadership.

• Confident writing technical specifications and acting as the bridge between developers and operators.

• Experience supporting complex project delivery: system implementations, feature releases, and product enhancements.

• Confident as an internal trainer, so operational staff can do their work without bottlenecking on you.

Equality, Diversity, and Inclusion

At Oner Active it’s about embracing diversity and empowering every individual to reach their full potential. We are committed to creating an environment where everyone feels valued, supported, and able to thrive.

We welcome applications from all backgrounds and are dedicated to ensuring that everyone has equal access to opportunities during the recruitment process. If you require any reasonable adjustments or additional support, we encourage you to reach out to our Recruitment team, we’re here to support you every step of the way.