Senior Full Stack Engineer – AI SaaS

Sowelo Consulting sp. z o.o. sp. k.

. Design, develop, and deploy full-stack features and services using React, Node.js, and cloud-native technologies.

Posted 5/15/2026full-timeRemote • 🇵🇱 PolandSenior💰 PLN 290,000 - PLN 460,000 per yearWebsite

Tech Stack

Tools & technologies

AWSCloudJavaScriptMongoDBNode.jsNoSQLReactSDLCSQLTypeScript

About the role

Key responsibilities & impact

Design, develop, and deploy full-stack features and services using React, Node.js, and cloud-native technologies.
Integrate and orchestrate leading text, image, and video AI models into production workflows for creative teams.
Collaborate closely with product managers to translate customer problems and requirements into clear, testable solutions.
Own features end-to-end, including implementation, automated testing, QA/UAT, deployment, and monitoring.
Proactively identify, scope, and ship high-impact experiments that drive customer value and business outcomes.
Maintain a high standard of code quality, reliability, and performance in a fast-paced, iterative environment.
Troubleshoot, debug, and resolve production issues, improving system resilience and observability over time.
Mentor and support other engineers by sharing best practices, patterns, and tooling that increase team velocity.
Contribute to improving the SDLC/PDLC processes, including code review, release practices, and documentation.
Collaborate with cross-functional teams (engineering, product, design, operations) to deliver cohesive, user-centric solutions.

Requirements

What you’ll need

5+ years of professional experience as a full stack engineer, including shipping production web applications.
Strong proficiency with modern JavaScript/TypeScript and a front-end framework (ideally React) plus experience with Node.js on the backend.
Experience with AI tools to increase productivity, enhance code quality and automate tasks
Hands-on experience building and consuming RESTful APIs and working with databases (e.g., MongoDB or similar NoSQL/SQL datastores).
Demonstrated ability to own features end-to-end: from scoping and implementation through testing, deployment, and monitoring.
Solid understanding of software engineering best practices: version control, code reviews, automated testing, CI/CD, and observability.
Experience working with cloud platforms (AWS or equivalent) and common DevOps practices for deploying and maintaining services.
Proven track record of delivering quickly in a fast-paced environment and iterating based on user feedback and metrics.
Strong communication skills and comfort collaborating with product managers, designers, and other engineers.
Growth mindset with a focus on mentorship, knowledge sharing, and continuously improving team velocity and quality.
Nice to Have: Experience with image, video, or generative AI model APIs in real products.
Background in the film, video, or advertising industry, or familiarity with professional creative workflows.
Experience with prompt chaining or orchestrating multiple AI services into cohesive user workflows.
Demonstrated leadership in guiding small teams, projects, or technical domains.
Familiarity with design systems or strong product/design sensibilities.

Benefits

Comp & perks

B2B contract
Fully Remote Role
Work on an AI-first product focused on real professional use cases, not consumer gimmicks.
Direct impact on how creative teams plan and produce video content end-to-end.
High-ownership IC role where you ship fast, experiment often, and see your work in production quickly.
Opportunity to build zero-to-one features and help define product direction, not just maintain legacy systems.
Modern tech stack (React, Node.js, cloud-native, modern AI model APIs) with room to influence architecture.
Strong engineering culture that values velocity, quality, and continuous improvement in SDLC/PDLC.
Mentorship and growth opportunities, including the chance to uplevel team practices and lead initiatives.
Close collaboration with product and creative stakeholders, giving you direct exposure to user needs and feedback.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

full stack developmentJavaScriptTypeScriptReactNode.jsRESTful APIsMongoDBautomated testingCI/CDcloud-native technologies

Soft Skills

strong communication skillsmentorshipcollaborationgrowth mindsetproblem-solvingleadershipteam velocity improvementuser feedback iterationcode qualityreliability