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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Software Engineer - **Company:** Lemfi's Foundations Tribe - **Location:** UK - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Artificial Intelligence, Code Review, Distributed Systems, Service Design, Backend, Api Gateway, Api Management - **Published:** September 30, 2026 - **Apply:** https://startup.jobs/senior-software-engineer-foundations-lemfi-10227586 ## About the Role * At least five years of backend engineering experience with Go as your primary language in a production environment. * A track record of building and scaling distributed systems - you have seen things break at scale and know how to design so they do not. * Experience working on or closely with platform or enablement teams: shared libraries, internal tooling, developer experience or API gateways. * Comfortable with the full lifecycle - design, build, operate, improve - with evidence of genuine end-to-end ownership rather than handing off to other teams. * Practical, demonstrable use of AI development tools in your daily engineering workflow; you validate AI output rather than blindly accepting it. * Strong opinions about system design, API contracts and service boundaries, backed by real examples you can walk us through. Nice to have * Exposure to fintech, payments or identity/KYC systems. * Experience building SDKs or developer-facing platform services consumed by other engineering teams. * Prior work in a high-growth startup or scale-up (roughly 50-500 people) where you had to set standards, not just follow them. ## Description LemFi's Foundations tribe is the platform backbone every product team relies on. We own onboarding and identity (KYC end-to-end), engagement systems (rewards, CRM tooling, LFI cache), and the internal SDKs and architectural standards that let other squads move fast without reinventing the wheel. If it touches how a customer gets onto the platform or how teams build reliably on top of it, it runs through us. We are looking for a Senior Backend Engineer who is at home in Go, cares deeply about building things that last, and has the ownership instinct to drive a system from design to production with minimal hand-holding. You will be a key technical voice in the tribe - setting standards, shipping real product, and enabling the rest of engineering to move faster because of the work you do. What you'll build and own * Own and evolve our core identity and onboarding services - KYC flows, verification orchestration and the data contracts that downstream systems depend on. * Build and maintain internal SDKs and shared libraries that abstract platform concerns (auth, identity, caching, eventing) so product teams can move without friction. * Define and champion cross-platform architectural standards, making opinionated decisions about service design, API contracts and data consistency that the wider engineering org follows. * Drive engagement platform capabilities - rewards logic, CRM integrations and LFI cache - from spec to production, using AI-assisted development tooling to compress iteration cycles without sacrificing correctness. * Partner closely with platform and infrastructure teams to raise the reliability and observability bar across Foundations-owned services. * Tackle the hard, ambiguous problems - new country launches, regulatory identity requirements, scaling events - and turn them into clean, well-documented solutions. * Contribute to a high-ownership engineering culture: code reviews, architectural reviews, incident response and mentoring are part of the job, not extras. ## Related Videos - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Are Code Reviews Worth It? Insights from 16 Years of Review Data](https://www.wearedevelopers.com/videos/1135-are-code-reviews-worth-it-insights-from-16-years-of-review-data) - [20 billion requests a week: Upgrading Twilio's API gateway at scale](https://www.wearedevelopers.com/videos/100234-20-billion-requests-a-week-upgrading-twilio-s-api-gateway-at-scale) - [Agentic employees in world's most downloaded FinTech app](https://www.wearedevelopers.com/videos/100123-agentic-employees-in-world-s-most-downloaded-fintech-app) - [Our GitOps approach for deploying an Identity Provider and an API Gateway in a SaaS company](https://www.wearedevelopers.com/videos/776-our-gitops-approach-for-deploying-an-identity-provider-and-an-api-gateway-in-a-saas-company) - [Nest.js - TypeScript in the backend can also be clean](https://www.wearedevelopers.com/videos/1033-nest-js-typescript-in-the-backend-can-also-be-clean) ## Related Articles - [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Dev Digest 150 - The shift to AI generated code, fingerprinting and OKRs vs. doing your job](https://www.wearedevelopers.com/magazine/533-dev-digest-150-the-shift-to-ai-generated-code-fingerprinting-and-okrs-vs-doing-your-job) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [MLOps And AI Driven Development](https://www.wearedevelopers.com/magazine/82-mlops-and-ai-driven-development)