--- title: 'Staff BackEnd Engineer - Series A - HR Tech at FledgeHQ' canonical: 'https://feeny.ai/job/staff-backend-engineer-series-a-hr-tech-fledgehq-barcelona-v7cvnqv4639t' type: 'job' last_seen: '2026-09-05' --- # Staff BackEnd Engineer - Series A - HR Tech at FledgeHQ - **Company:** FledgeHQ - **Location:** Barcelona, Spain - **Employment:** full-time - **Work type:** remote - **Posted:** 2026-01-21 - **Last confirmed live:** 2026-09-05 - **Apply:** https://jobs.gem.com/fledge/am9icG9zdDrw45iAIsfEhQEG3lBdp5Xl ## Job description Fledge We are a boutique Talent search firm connecting exceptional Talent with the most innovative companies in the AI and software development industries across EMEA. Our clients are among companies with innovative products that have a positive impact on our societies, and we present them with a solution model between fine consulting and flexible recruitment process outsourcing : - Fractional Talent Acquisition Advisory - Recruitment operation tools - On-demand Talent sourcing expertise Job Summary We are seeking a Staff Backend Engineer to join an elite team of industry leaders building an AI platform tailored for the HR sector. You will be the technical architect and backbone of the intelligent HR platform. You will focus on the backend development with Python/Django and the design of scalable AI-native architectures to orchestrate complex, autonomous recruitment workflows. You will leverage cutting-edge AI-assisted development tools, such as Cursor and Claude Code, to prototype and ship complete, full-stack features rapidly with minimal handoffs. This is an opportunity to build production-grade conversational AI systems that integrate LLMs, build our agent framework, use real-time voice and telephony interfaces, and enable zero-touch recruitment automation. In this role, you will - Lead the development of full-stack solutions, from designing intuitive user interfaces to crafting robust backend systems. - Collaborate with cross-functional teams, including AI researchers and data scientists, to seamlessly integrate AI models into user-centric applications. - Architect scalable, maintainable systems that support the company’s rapid growth and mission to make a meaningful environmental impact. - Drive innovation by exploring and implementing modern frameworks, APIs, and cloud solutions. - Mentor and support junior developers, fostering an environment of collaboration and technical excellence. - Automate and optimize systems to deliver faster, more efficient solutions to both users and internal teams. Required Skills and Qualifications - Expert-level proficiency in Python with extensive experience in Django, Django Channels, FastAPI, ASGI, and async programming. - Strong system design skills and ability to articulate technical trade-offs. - Proven skills in building scalable backend systems handling 100+ concurrent AI workflows with low latency. - Deep knowledge of LLMs, including prompt engineering, chaining, caching, fine-tuning, and usage of open-source (Llama, Mistral) or closed-source models (OpenAI, Anthropic). - Experience with retrieval-augmented generation (RAG), vector databases, and semantic search implementations. - Familiarity with AI agentic frameworks, multi-agent orchestration, planning, and reasoning systems. - Hands-on experience integrating speech-to-text, text-to-speech, telephony (Twilio, IVR), and voice activity detection into production systems. - Proficiency with AI-assisted development tools and ability to deliver full-stack features (backend + frontend) efficiently. - Good frontend skills with JavaScript/TypeScript and React (AI-assisted vibe coding). - Understanding of asynchronous message queues (Celery, RabbitMQ/Redis) and data storage technologies (PostgreSQL, Redis). - English and Spanish fluency ## Preferred Skills and Qualifications - Great communicator: You can help clients understand the value we bring and help our team better understand our clients - Resilience: You can ride the ups and downs of the job and stay balanced through it all - Results-based: You own the outcome - Team player: You put the team before yourself - Organized: You can keep track of your workload and ensure critical things are not missed - Experience with DevOps practices: CI/CD pipelines, containerization (Docker), cloud platforms (AWS, Azure). - Knowledge of production monitoring, logging, alerting, and security best practices for enterprise B2B AI solutions. - Familiarity with multi-modal conversational interfaces and fallback mechanisms for robust production deployment. - Passion for working in fast-paced startup environments with a hands-on, ownership-driven mindset. In return, they offer - Top of the market salary - Equity plan - Remote policies - Relocation support and Visa Sponsorship 🌈 Diversity, Equity, Inclusion, and Belonging We are committed to enabling everyone to feel included and valued, and we trust our partners to do the same. Both the company and its culture are strongest when composed of diverse experiences and backgrounds. All qualified applicants will receive consideration for employment without regard to age, color, family, gender identity, marital status, national origin, physical or mental disability, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable laws. ℹ️ Important If you have a medical condition or an individual need for an adjustment to our process, and you believe this may affect your ability to be at your best, please let us know so we can discuss how we can best support you and make any necessary adjustments. In case of any doubts or questions, please contact here: dhamelyz@fledge.net ## About FledgeHQ ## Company Overview - **One-liner**: Fledge is a boutique talent acquisition and search firm that helps tech companies and startups hire niche technical talent in Europe and the US. - **Entity Type**: Private (bootstrapped, no disclosed funding rounds) - **Headquarters**: Paris, Île-de-France, France (with a second office in Austin, Texas, USA) - **Founded**: Year not publicly available - **Founders**: Founders not publicly listed ## Core Business - **Primary industry**: Talent acquisition / Recruitment services for the technology sector - **Target customers**: B2B – primarily early- to growth-stage startups and scale-ups in Europe and the US, with a focus on engineering, data, AI, and security roles. - **Mission/purpose**: “Making hiring, work for everyone” – providing human-centric, tailored talent solutions that put people first and help both companies and candidates thrive. ## Products & Services - **Tailored Talent Search (Retained & Contingent)**: Full-cycle sourcing and recruitment of senior technical and leadership roles, including Founding Engineers, Cybersecurity Researchers, and Product Engineers. - **Fractional Talent Acquisition Advisory**: Embedded recruitment consultants who work directly with hiring managers to accelerate operations. - **Recruitment Operation Tooling**: Support for implementing sustainable talent management processes and employer branding. - **On‑demand Talent Search** (“Plug and Play”): Rapid, flexible sourcing for specific technical roles without long-term commitment. - **Coaching & Legal Support**: Career coaching for candidates and assistance with contract negotiations, compensation, and promotion discussions. ## Market Standing - **Valuation/Market Cap**: Not disclosed - **Key Metric**: Annual revenue not publicly available; total funding rounds not applicable (bootstrapped) - **Notable Investors/Partners**: No disclosed investors; partners with innovative startups and progressive tech companies; clients include Photoroom, Glady, ING Belgium, Wordsmith AI, and others (based on alumni data). - **Growth Signals**: - LinkedIn followers: 1,448 (yearly growth +12.6%) - Website traffic: 2,085 monthly visits (yearly growth +60.4%) - Workforce distributed across France, Spain, Colombia, Belgium, and the US - Recent expansion into Mexico City (hiring Forward Deployed Engineer to serve Latin American talent pool) - Active hiring campaigns for multiple portfolio startups (security, growth, engineering roles) ## Competitive Advantages - **Niche specialization**: Deep focus on tech talent in Europe and the US, particularly in AI, cybersecurity, data, and engineering – areas where generalist agencies often lack expertise. - **Human‑centric approach**: Emphasis on coaching, legal support, and career progression for candidates differentiates from high‑volume RPO (Recruitment Process Outsourcing) firms. - **Boutique, tailored service**: Small team (6 people) allows close partnership with founders and hiring managers, offering fractional advisory and flexible engagement models. - **Data‑driven sourcing**: Use of analytics to identify root causes in hiring processes and improve employer branding. ## Strategic Focus - **Geographic expansion**: Actively building presence in Latin America (Mexico City) to complement European and US operations, targeting bilingual candidates. - **Deepening AI & security practice**: Increasing placement volume in AI, cybersecurity, and governance roles (reflected in recent job postings). - **Strengthening candidate‑side offerings**: Expanding coaching and legal support to attract top passive talent and build a strong talent community. ## Why Work Here - **Culture**: Described as “human‑centric” and talent‑first; the team is lean (6 people) with a collaborative, remote‑friendly ethos. - **Work policy**: Hybrid and remote options available – some roles are fully remote, others are hybrid in Paris; flexibility depends on the client company. - **Notable perks**: - Exposure to cutting‑edge startups in AI, cybersecurity, and growth - Opportunity to work with a distributed international team - Coaching and legal support also available to internal team members? (not explicitly stated, but the firm values career development) - Emphasis on “positive impact” and progressive hiring practices. - **Engineering culture**: For technical candidates placed through Fledge, the firm focuses on high‑impact roles (Founding Engineer, Forward Deployed Engineer) with strong mentorship and autonomy. ## Sources 1. [fledge.net](https://www.fledge.net/) 2. [linkedin.com/company/fledgehq](https://www.linkedin.com/company/fledgehq) 3. [fledge.net/candidates](https://www.fledge.net/candidates/) 4. [fledge.net/companies](https://www.fledge.net/companies/) 5. [fledge.net/contact](https://www.fledge.net/contact/) ## Other roles at FledgeHQ - [Director of Growth Marketing, Paris](https://feeny.ai/job/director-of-growth-marketing-paris-fledgehq-paris-fppammw3mdh7) — Paris, France - [Senior CyberSecurity Researcher, Paris](https://feeny.ai/job/senior-cybersecurity-researcher-paris-fledgehq-paris-z1vjkdsmmbex) — Paris, France - [Forward Deployed Engineer - Series A - HR Tech](https://feeny.ai/job/forward-deployed-engineer-series-a-hr-tech-fledgehq-mexico-city-xxmq4macfy7t) — Mexico City, Mexico - [Founding Product Engineer - Early stage](https://feeny.ai/job/founding-product-engineer-early-stage-fledgehq-paris-02q9my4mj33b) — Paris, France - [Backend Engineer - 2nd hand Marketplace](https://feeny.ai/job/backend-engineer-2nd-hand-marketplace-fledgehq-barcelona-2bhmt3gnpzsa) — Barcelona, Spain - [Forward Deployed Engineer - Series A - HR Tech](https://feeny.ai/job/forward-deployed-engineer-series-a-hr-tech-fledgehq-barcelona-8vg4p6wj6gk2) — Barcelona, Spain - [Senior Product Designer - Scale Up - 2nd hand Marketplace](https://feeny.ai/job/senior-product-designer-scale-up-2nd-hand-marketplace-fledgehq-barcelona-rpy7q5vs68j4) — Barcelona, Spain - [Machine Learning Engineer - Scale Up - 2nd hand Marketplace](https://feeny.ai/job/machine-learning-engineer-scale-up-2nd-hand-marketplace-fledgehq-barcelona-0c5sx1avgm9r) — Barcelona, Spain - [Forward Deployed Engineer - Series B - AI Customer Agents](https://feeny.ai/job/forward-deployed-engineer-series-b-ai-customer-agents-fledgehq-paris-znf7m0g5w711) — Paris, France - [Lead Account Manager - EMEA - NY based startup](https://feeny.ai/job/lead-account-manager-emea-ny-based-startup-fledgehq-paris-gw0w4a67dwrp) — Paris, France