We’re building the next generation of employee benefits infrastructure. At Happl, we help global teams design, manage, and scale benefits that actually work for their people by using AI, across flex allowances, benefits, insurance, recognition, and wellbeing, all in one intelligent platform. Happl is backed by leading investors such as YCombinator, 6Degrees Capital, and more, known for backing leading companies such as Deel, Rippling, Airbnb, Coinbase, Dropbox, and most recently was awarded a place in the UK’s top 100 startups for 2026. About the role: As a Technical Account Manager at Happl, you’ll be the person customers trust to turn their ambitions into reality. You’ll own the technical implementation of Happl across a portfolio of accounts, designing the architecture, building the integrations, and making sure every deployment is intelligent, scalable, and set up to grow. This role sits at the intersection of customer success, product, and engineering. You’ll work directly with HR, Finance, and key stakeholders to understand what they actually need, then translate those requirements into solutions that genuinely change how their teams experience benefits. You’ll be equally comfortable presenting an architecture to a CTO, configuring a complex data integration, and jumping into a troubleshooting session to get a customer unblocked. We’re still building this function. That means there’s no rigid playbook to follow; you’ll help write it. If you’re energised by that kind of ownership and want to shape how a category-defining product gets deployed across the world, this is the role for you. What you’ll be doing:

• Leading end-to-end customer implementations, from discovery and scoping through to go-live and long-term optimisation, taking full ownership of the technical relationship throughout
• Designing AI-powered solutions tailored to each customer’s benefits structure, HRIS landscape, and people strategy — turning complex requirements into clean,

scalable deployments

• Running structured technical discovery sessions and solution workshops,

mapping customer needs to Happl’s capabilities before a single line of configuration is written

• Owning integrations with HRIS,

payroll, and third-party platforms (including REST APIs and webhooks), ensuring seamless, reliable data flows across every customer’s tech stack

• Building and automating implementation workflows using AI tools,

reducing manual effort and raising the consistency and quality of every deployment

• Acting as the technical escalation point during and after go-live,

diagnosing root causes quickly and partnering with Engineering to drive permanent fixes

• Translating what you learn across implementations into reusable assets — architecture blueprints,

playbooks, and internal tooling — that make every future deployment faster and smarter

• Partnering with Customer Success to ensure adoption is strong post-launch,

identifying configuration gaps and opportunities that drive retention and expansion

• Feeding implementation insights back to Product and Engineering with clarity

and evidence, directly influencing the roadmap

• Analysing configuration and usage data across your account portfolio to spot patterns,

flag risks early, and surface opportunities to improve customer outcomes

• Championing AI-first ways of working — actively exploring tools like Claude

and ChatGPT to accelerate delivery, automate repetitive tasks, and bring smarter thinking to every customer engagement

• Staying genuinely curious about HR tech,

benefits trends, and the evolving AI landscape; bringing ideas that keep Happl and its customers ahead of the curve What we’re looking for:

• 3+ years in a Technical Account Manager or Implementation Engineer role within a B2B SaaS environment
• A track record of owning complex multi-stakeholder implementations end-to-end — with technical depth to design robust solutions plus communication skills to bring customers along
• Hands-on experience with APIs,

webhooks & data integrations; comfortable diagnosing issues & building elegant solutions documented clearly for customers & internal teams

• Truly AI-native: use tools like Claude & ChatGPT in day-to-day work; excited about what they unlock in implementation & customer delivery
• Strong analytical & problem-solving instincts — able to take ambiguous requirements & turn them into clear well-structured technical plans
• Excellent communicator who adapts naturally — confident presenting solution architecture to CTOs as well as troubleshooting configuration issues with HR admins
• Highly organised & self-directed; capable of managing multiple concurrent implementations without compromising quality or customer experience
• Excited by helping build a function from ground up — energised by defining how things should work rather than following an established path
• Genuine curiosity about HR technology employee benefits & role AI plays in reshaping how companies support their people

If you don’t meet every requirement but feel this role fits your trajectory we’d still love to hear from you. What to expect: Happl is growing fast; pace reflects that. You’ll work on things without established answers yet; build processes that don’t exist; make decisions with incomplete information; iterate quickly when things change. Some weeks will be brilliant; some genuinely hard. Customer needs evolve; priorities shift; occasionally asked to figure out something nobody at Happl has before. Need resilience resourcefulness directness with customers team self when something isn’t working. You get real access influence ownership not found in larger companies. Your work visible ideas land talented motivated people invested in doing something that matters. If energised by challenge of building (not just operating) you’ll find much to love here. Why join Happl:

• Be part of building something that really matters — future of how companies support their people
• Competitive salary reflecting your impact
• Real equity — meaningful stake in what we build together
• Hybrid working from day one with trust & flexibility for best work
• Your own Happl account — use platform you help build & shape
• Private Health Insurance because we care about your wellbeing
• Dental insurance
• Personal Wellbeing budget — spend however works for you no questions asked
• Dedicated Learning & Development budget for growth in exciting directions
• Pension from day one — invested in your future not just short term

Additional Details: Location: London (Holborn) Team: Product Working arrangement: Hybrid (3+ Days in Office)

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