Mid-Senior Full-Stack TypeScript Engineer (React, AWS)

• Location: Remote (Poland) - ability to meet in Poznan once per month 

• Type: Full-time 

• Experience level: Mid / Senior

About the company

Our client is an early-stage, product-driven startup led by experienced founders with deep backgrounds in large-scale distributed systems, AI-powered platforms, and enterprise SaaS. They are now expanding the engineering team to accelerate product development toward design partners and early adopters in 2026.

They’re building real-time Artificial Sales Intelligence that supports sales representatives during live customer conversations. 

Their platform joins live sales calls, transcribes them in real time, and delivers context-aware guidance, dynamic sales playbooks and instant knowledge recall without increasing cognitive load for the rep. The goal is simple but ambitious: turn every sales call into a confident, high-impact conversation. 

The Role 

We are looking for a Mid-Senior Full-Stack Engineer who is comfortable owning features end-to-end from UI to backend to cloud infrastructure. 

You will work directly on the company’s core product, building real-time user interfaces, scalable APIs, and cloud-native services that power live AI-assisted sales calls. This role is hands-on, highly technical, and suited to someone who enjoys solving complex problems in a fast-moving startup environment. 

You will collaborate closely with the founders on product architecture, technical decisions, and delivery.

What You Will Do

• Design, build, and maintain full-stack features using TypeScript across frontend and

            backend

• Develop responsive, real-time user interfaces in React

• Build and evolve backend services and APIs running on AWS

• Work with containerized services using Docker

• Operate comfortably in a Linux-based development and production environment

• Contribute to system architecture decisions for scalability, latency, and reliability

• Collaborate via GitHub using modern workflows (PRs, code reviews, CI)

• Debug, profile, and optimize performance in real-time systems

• Work asynchronously and communicate clearly in a fully remote team

Must-Have Requirements

• Strong commercial experience with TypeScript

• Solid experience with React

• Hands-on experience with AWS (e.g. EC2, ECS/EKS, Lambda, S3, IAM or

            equivalents)

• Comfortable working in Linux environments

• Practical experience using Docker

• Daily use of GitHub (or equivalent Git-based workflows)

• Fluent spoken and written English

• Proven ability to work effectively in a remote setup

• Strong problem-solving mindset

• Bachelor’s degree (BSc or equivalent) in Computer Science or a closely related

            field

Should-Have Skills

• Experience building APIs with Express

• Familiarity with Tailwind CSS

• Good understanding of algorithms and data structures

• Working knowledge of network protocols (HTTP, WebSockets, streaming concepts)

• Solid understanding of databases (SQL and/or NoSQL)

Nice-to-Have

• Experience with LangChain or similar LLM orchestration frameworks

• Familiarity with Auth0 or modern authentication/authorization systems

• Experience using shadcn/ui

• Previous experience in real-time systems, AI-powered products, or SaaS platforms

What We Offer

• Opportunity to build a core product from an early stage, not just incremental

            features

• Direct impact on product direction and technical architecture

• Work closely with experienced founders and a small, highly skilled team

• Fully remote-first working environment

• Competitive salary aligned with experience and responsibility

• Meaningful equity participation for senior contributors

• High level of autonomy, trust, and ownership

• A product-focused culture that values clarity, quality, and real customer impact

This role is ideal for an engineer who:

• Enjoys end-to-end ownership

• Thinks in systems, not just components

• Is comfortable with ambiguity and fast iteration

• Cares deeply about product quality and real user value

• Wants to help define the technical foundations of a new company