--- title: 'Full Stack Engineer at Sent, Inc.' canonical: 'https://feeny.ai/job/full-stack-engineer-sent-inc-kosovo-cmzsmbnkph1x' type: 'job' last_seen: '2026-09-10' --- # Full Stack Engineer at Sent, Inc. - **Company:** Sent, Inc. - **Location:** Kosovo - **Employment:** full-time - **Work type:** onsite - **Posted:** 2026-04-24 - **Last confirmed live:** 2026-09-10 - **Apply:** https://jobs.ashbyhq.com/sent/40e69960-2f53-4f6d-9b4a-b964e69748c3/application **Skills:** Next.js, React, .NET, ASP.NET Core, APIs, Databases, System Integration > Design and ship end-to-end features for Sent's messaging infrastructure, working across .NET and React frontend with ASP.NET Core backend. The role involves building APIs, integrating with carrier networks and internal services, and maintaining high reliability and scalability. ## Job description Pristina, Kosovo · In-Office ## About Sent Sent is building the messaging infrastructure that powers how businesses communicate with their customers. We provide a unified API for SMS, WhatsApp, iMessage, and RCS, making it simple for developers to reach people on any channel. We've raised $5.8M in funding and we're growing fast. ## The Role We're looking for a Full Stack Engineer who can move across the entire product — designing APIs and shipping UI with equal confidence. You'll take ownership of end-to-end features that touch every layer of the Sent platform. ## What You'll Do - Own features end-to-end. Take requirements from design to delivery — backend API, frontend UI, database, and everything in between. - Work across both stacks. Build and maintain services in .NET / ASP.NET Core on the backend and Next.js / React on the frontend. Comfortable in both without being precious about either. - Integrate with the broader system. Connect to carrier networks, internal services, and third-party APIs. Understand how your features fit into the larger architecture. - Move fast without breaking things. Ship regularly and take responsibility for what you build. Write tests, observe your deployments, and fix what breaks. - Bring a product mindset. Think about what you're building and why. Push back when something doesn't make sense and suggest better approaches when you see them. ## What We're Looking For - 3+ years across both frontend and backend development. Not a preference — you actually do both. - Hands-on Next.js / React and .NET / ASP.NET Core. You've shipped real features in both stacks. - Experience with APIs, databases, and integrations. You understand how systems connect and what it takes to make them reliable. - Scalability awareness. You think about what happens when load increases before it happens. - Strong product instincts. You're not just building what's on the ticket. You're building the right thing. ## Why Sent We're a team building hard technical problems in messaging infrastructure. We value directness, craftsmanship, and actually shipping things. In Pristina, you'll be part of a close-knit engineering and operations team doing real work — not support work, not maintenance work. Work that matters. If you want to join a fast-moving company with a clear product and strong backing, this is that opportunity. Sent, Inc. is an Equal Opportunity Employer committed to building a diverse and inclusive team. We encourage applications from candidates of all backgrounds and experiences. ## About Sent, Inc. ## Company Overview - **One-liner**: Sent is a unified API platform that enables developers to send messages across SMS, WhatsApp, RCS, and other channels through a single, intelligent interface. - **Entity Type**: Private (Seed stage) - **Headquarters**: New York, New York, United States - **Founded**: 2023 (December) - **Founders**: Daniel Vataj (CEO), Betim Drenica (CTO) ## Core Business - **Primary industry**: Messaging infrastructure / Developer tools / Telecommunications - **Target customers**: B2B – developers, engineering teams, and businesses (SMB to Enterprise) that need reliable, multi-channel messaging. - **Mission or purpose**: To solve the reliability and complexity problems in messaging infrastructure, giving developers a simple, transparent, and dependable way to communicate with users across any channel. ## Products & Services - **Sent API**: A single RESTful API that abstracts multiple messaging channels (SMS, WhatsApp, iMessage, RCS). Handles authentication, rate limiting, retries, and automatic fallback between channels. Includes a sandbox mode for testing. - **Intelligent Routing Engine**: Real-time decision-making for message delivery based on cost, delivery success rates, recipient preferences, and geographic optimization. - **Smart Routing & Failover**: Automatically attempts delivery through fallback channels (e.g., SMS → WhatsApp) when the primary channel fails, requiring no additional code. - **Real-Time Analytics & Webhooks**: Track message lifecycle, delivery confirmations, read receipts (where available), bounce reasons, and aggregate performance metrics. ## Market Standing - **Valuation/Market Cap**: Not disclosed - **Key Metric**: Total Funding – conflicting reports: **$5.8M** per company website [sent.dm](https://www.sent.dm/en/company/about-us) vs. **$4.55M** per LinkedIn (Pre-Seed $1.0M + Seed $3.5M) [linkedin.com](https://www.linkedin.com/company/sentdm) - **Notable Investors**: Bessemer Venture Partners, Urban Innovation Fund (Seed round lead); prior round includes 2 unnamed investors. Advisor/Investor: Brett Perlmutter. - **Growth Signals**: - Sent over **550 million** messages (company website) - **5,000+** active developers on the platform - Headcount grew **650% YoY** to 25 employees (LinkedIn) - Opened engineering presence in Kosovo and operations in Botswana - **99.9%** uptime SLA guarantee ## Competitive Advantages - **Unified API vs. point integrations**: Single integration for multiple channels, reducing maintenance overhead. - **Intelligent routing & failover**: Automatic cost and delivery optimization without developer intervention. - **Developer-first experience**: Clean docs, public roadmap, honest pricing, and transparent error handling. - **Global by design**: Distributed team (US, Kosovo, Botswana) enables local compliance and carrier relationships. - **Built by engineers who felt the pain**: Founders personally experienced messaging reliability failures, driving product obsession. ## Strategic Focus - Expand supported channels (always evaluating new ones like RCS and iMessage). - Deepen outbound compliance capabilities – hiring for international messaging compliance roles (WhatsApp, RCS). - Grow self-serve developer funnel through SEO, paid channels, and lifecycle experimentation. - Strengthen partnership ecosystem (technology, channel, and carrier partners). - Scale enterprise sales with dedicated Account Executives and Technical Account Managers. ## Why Work Here - **Culture highlights**: “Built for developers, by developers” – transparency in pricing, public roadmap, and honest docs. Values: Reliability, Simplicity, Innovation, Transparency. - **Work model**: In-office at the New York City HQ (157 W…), with a globally distributed team across Kosovo and Botswana. Remote/hybrid policy not explicitly stated, but roles are listed as “In-Office” on Built In NYC. - **Engineering culture**: Strong emphasis on developer experience, automation, and owning the full stack. Team includes Staff Engineer for Networks & Protocols. Open roles currently in compliance, demand generation, partnerships, account executive, and technical account manager. - **Notable perks**: Startup equity, early employee impact, and opportunity to shape messaging infrastructure for millions of users. Public roadmap and open feedback loop with the developer community. ## Sources 1. [sent.dm – About Us](https://www.sent.dm/en/company/about-us) 2. [LinkedIn – Sent](https://www.linkedin.com/company/sentdm) 3. [Built In NYC – Sent Jobs](https://www.builtinnyc.com/company/sent/jobs) 4. [Sent API Docs – Platform Overview](https://docs.sent.dm/start/concepts/platform-overview) 5. [Ashby – Sent Jobs](https://jobs.ashbyhq.com/sent) ## Other roles at Sent, Inc. - [Strategic Finance](https://feeny.ai/job/strategic-finance-sent-inc-new-york-w8qaqqc9k7ry) — New York, NY - [Sales Engineer](https://feeny.ai/job/sales-engineer-sent-inc-new-york-zz5cz2pq32mh) — New York, NY - [Content Engineer](https://feeny.ai/job/content-engineer-sent-inc-new-york-1ekv8mp5jdy7) — New York, NY - [Compliance Engineer](https://feeny.ai/job/compliance-engineer-sent-inc-kosovo-tc3hy9478av8) — Kosovo - [QA Engineer](https://feeny.ai/job/qa-engineer-sent-inc-kosovo-tkzcj2xp1q6a) — Kosovo - [Demand Generation](https://feeny.ai/job/demand-generation-sent-inc-new-york-brtx5gcfsq24) — New York, NY - [Founding Partnerships](https://feeny.ai/job/founding-partnerships-sent-inc-new-york-33jcvcb7qm78) — New York, NY - [Developer Advocate](https://feeny.ai/job/developer-advocate-sent-inc-new-york-761f7p5bgexp) — New York, NY - [Frontend Engineer (Next.js)](https://feeny.ai/job/frontend-engineer-next-js-sent-inc-kosovo-cp3ft75y5cx8) — Kosovo - [Backend Engineer (.NET)](https://feeny.ai/job/backend-engineer-net-sent-inc-kosovo-a2y38t101z9h) — Kosovo