Senior React Full-stack Developer

Senior Developer? Work Remote. Get Paid Well. Build What Matters. Lemon.io connects hand-picked senior developers with vetted startups across the US and Europe — no bidding wars, no ghosting, just serious opportunities. We're currently hiring for a research-driven AI company on a mission to slash the cost of modern AI — co-designing hardware, software, algorithms, and models to make AI's benefits accessible to everyone. They're active open-source contributors, building the infrastructure behind next-generation AI at scale. Open roles: Senior Back-end Engineer (Golang), Senior DevOps Engineer, Senior Site Reliability Engineer, Senior Storage Engineer, Senior Python & LLM Developer, Senior Back-end Engineer (Python) Why this one's worth a look: You'll be working on infrastructure that directly shapes how AI gets built and deployed, at a company operating at the frontier of the field. Locations: EU, US, Canada, UK, Australia, Singapore, Ireland, Norway, Switzerland, Iceland, and Mexico. Requirements for Senior Back-end Developers: 5+ years of software development experience 3+ years of experience with Golang and/or Python 2+ years of experience with Kubernetes 2+ years of experience with AI agent development Not your stack? We're placing Senior Developers (4+ yrs commercial experience) across AI Agent Architecture, AI Automation Architecture, AI Engineering, Site Reliability Engineering, Platform Engineering, React & Python, React & Golang, Golang, React & Java, React & Ruby, Ruby, PHP & Vue, Vue & Node.js, React & .NET, Android & iOS, iOS & Swift, Flutter & Firebase, Solutions Engineer, Blockchain (Ethereum/Ethers.js/Wagmi/Viem/Solana), Angular & Node.js, Vue & .NET, Python & Vue, DevOps, MLOps, Data Science, Angular & PHP, Angular & .NET, Symfony & React, Symfony & Vue, Symfony & Angular, Python, Symfony & JavaScript & Next.js & TypeScript, Data Analysis, React & PHP, Data Engineering, Project Management, Product Management, QA Automation, QA Manual, Embedded Softwa…

Posted 30 Sept 2026

Senior Python Developer Salary: From £50,000 per annum, depending on experience Location: Remote, open to candidates anywhere in the UK. If you like to work alongside colleagues in person, our offices are in Birmingham, Bristol, Exeter and London. Term/Hours: Permanent, 32–40 hours per week. We are flexible on working pattern, so please tell us what suits you in your application. Closing date for applications: Monday 12th October 2026 We welcome applications from all suitably qualified candidates regardless of sex, gender identity, age, disability, ethnicity, religion or belief, sexual orientation, or any other protected characteristic. We are only accepting direct applications (no recruiters please). Unfortunately, we cannot consider applications requiring visa sponsorship now, or in the future. About the Role We are looking for a Senior Python Developer (or someone operating close to senior level) to join our five-person energy development team. You will help lead the design and implementation of Python packages building on the Home Energy Model that will enable the next generation of energy performance assessment. You will work closely with DESNZ, external collaborators, our internal domain experts and your dev team, turning tangible and pressing user needs into reliable, maintainable Python software. The team is supportive and high-performing, and the work has a direct impact on carbon reduction. This role includes line management . You may already manage one or more developers, or you may be ready to take that step, supported by our programme of leadership and management training. Either way, you will help the people you manage to do their best work and develop their careers. What you will do · Design, build and improve Python packages for modelling, simulation and data processing. · Lead engineering decisions, architecture discussions and technical problem solving. · Turn analytical and modelling needs into shippable software. · Line manage one or more develo…

Posted 2 Oct 2026

Wir bei Knuddels haben das Ziel, soziale Netzwerke wieder wirklich sozial zu machen – weg vom Konsumieren von Content, hin zu echter menschlicher Nähe. Bei Knuddels soll jeder 3 wichtige Menschen für sein echtes Leben finden. 100.000 Mitglieder erzeugen bei uns täglich Millionen von Events. Deine Aufgabe: Diese Daten nicht nur analysieren, sondern die richtigen Schlüsse daraus ziehen – und dafür sorgen, dass datenbasierte Erkenntnisse im ganzen Unternehmen ankommen und zu konkreten Verbesserungen führen. Warum Teilzeit? Wir wissen, dass es großartige Data-Science-Profile gibt, die nicht Vollzeit arbeiten können oder wollen - sei es wegen Familie, Weiterbildung, Selbständigkeit oder schlicht Lebensentwurf. Das ist für uns kein Kompromiss, sondern eine bewusste Entscheidung: Lieber die richtige Person in Teilzeit als die falsche in Vollzeit. Deine Aufgaben Hands-on Datenanalyse & Data Science: Du analysierst unsere komplexen Daten und ziehst wertvolle Erkenntnisse mittels Data Mining, Clustering, Forecasting oder Recommendation Classification. Du stellst dabei die Korrektheit unserer Daten in den verschiedenen Systemen sicher. Datengetriebene Entscheidungen ermöglichen: Du analysierst unsere Daten, bereitest die Ergebnisse verständlich auf und leitest daraus konkrete strategische Maßnahmen ab. Dabei arbeitest du eng mit Produktmanagement, Community Management und Geschäftsführung zusammen – nicht im Elfenbeinturm, sondern als Sparringspartner auf Augenhöhe. Du verknüpfst quantitative Analysen mit dem qualitativen Feedback unserer Community, um fundierte Entscheidungen zu ermöglichen. und etablierst Best Practices wie Code Reviews und Dokumentation. Hands-on Datenanalyse & Data Science: Du arbeitest operativ mit unseren komplexen Daten und ziehst wertvolle Erkenntnisse mittels Data Mining, Clustering, Forecasting oder Recommendation Classification. Du stellst die Korrektheit unserer Daten in den verschiedenen Systemen sicher und etablierst Best Practices wie Code Revi…

Posted 24 Sept 2026