Happl - Backend Engineer
Requirements
• 3+ years experience as a Backend or Software Engineer • Strong experience with modern backend languages and frameworks (e.g. Typescript, Golang) • Experience designing and consuming APIs (REST, event-driven systems) • Solid understanding of databases (SQL / PostgreSQL) and data modelling • Experience building and scaling production systems • Familiarity with cloud infrastructure and CI/CD workflows • Comfortable working with integrations and third-party services • Experience using AI tools (e.g. ChatGPT, Claude) as part of your workflow • Clear communicator who works well with both technical and non-technical stakeholders • Proactive, detail-oriented, and comfortable taking ownership • If you don’t meet every requirement but feel this role fits your trajectory, we’d still love to hear from you.
Responsibilities
• This role sits within our Engineering team and works closely with Product, Frontend, Data, and Customer teams across the full development lifecycle. • You’ll help shape how we build and scale our backend by focusing on: • Designing and scaling the backend architecture powering a global, AI-first platform • Building and owning core services across benefits, allowances, payments, and reporting • Developing scalable data models and ensure integrity across systems • Improving platform reliability, performance, security, and observability • Automating workflows and Go Rules to streamline complex operations • Collaborating closely with product and frontend teams to ship end-to-end features • Writing clean, well-tested, production-ready code • Using AI tools to accelerate development and iteration • Contribute to architecture, technical decisions, and engineering standards • You’ll play a key role in ensuring Happl’s backend scales as our customer base, features, and global footprint grow.
Benefits
• Help shape the future of employee benefits • Meaningful equity in an early stage growing business • Flexible hybrid working from day one • Access to your own Happl benefits platform • Optional enrolment in Private Health Insurance • Optional enrolment in Dental insurance, including family cover • A flexible Wellbeing budget to spend on whatever wellbeing means to you • Learning & Development (L&D) allowance • Pension scheme from day one • Rapid career progression in a scaling engineering team • Call 1: 20-min Intro call with Ben (COO & CoS) • Call 2: 30-min deep dive with Lee (Head of Engineering) • Call 3: 30-min deep dive with Ben T (CEO & Founder) • Additional Details • Additional Details • Location: London, WaterlooTeam: EngineeringWorking arrangement: Hybrid (3+ Days in Office)
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