Senior Full Stack Engineer

Readdle Inc.; Warszawa; On-site; PLN 240,000 - 320,000; Full time

Job summary

A technology company specializing in productivity apps is seeking a Senior Full Stack Engineer to develop and maintain core features. The ideal candidate will have deep expertise in Nest.js and Postgres, solid understanding of architecture, and a passion for technology. Join the team to help shape innovative solutions that enhance user productivity.

Benefits

Customer-centric culture

Commitment to mastery

Exceptional team environment

Opportunity for real impact

Culture of innovation

Qualifications

• Deep expertise in Nest.js and Postgres including strong SQL skills.
• Solid understanding of architectural patterns like distributed systems.
• Upper-Intermediate level of English; Fluent in Ukrainian.

Responsibilities

• Build and maintain backend services using TypeScript, Node.js.
• Troubleshoot and fix backend and API issues across environments.
• Develop new user-facing features and applications.

Skills

Nest.js

Postgres

TypeScript

React

Next.js

Tailwind CSS

CI/CD

APIs

SQL

Job description

Readdle is a pioneering force in the personal productivity space on Apple devices, having shaped the landscape since 2007. Our mission is to empower individuals and teams with innovative technology, enhancing their efficiency and creativity. We are dedicated to crafting exceptional mobile and desktop experiences for those who aspire to achieve more.

We’re looking for a Senior Full Stack Engineer to join us as one of the key team members driving the next stage of Documents ’ growth. You’ll help build and test the core features that will power the entire Documents platform — enabling our apps to move beyond a local-only model, while supporting both the web experience and exciting new initiatives, scale delivery, and complex user experiences.
What you’ll do:

• Build and maintain reliable backend services using TypeScript, Node.js, NestJS, Postgres, and AWS
• Troubleshoot and fix tricky backend and API issues across different environments to keep things running smoothly
• Take ownership of developing new user-facing features and applications using TypeScript, React, Next.js, and Tailwind CSS
• Ensure applications adhere to best practices for user experience, specifically prioritizing SEO and Web Accessibility standards
• Help us improve by suggesting better tools, new tech, or smarter architecture to reduce technical debt and speed things up
• Work with our DevOps team to shape the infrastructure, improve CI/CD pipelines, and strengthen our monitoring and logging
• Work closely with Product and Marketing teams to translate business goals into clear technical requirements and provide accurate time estimates
• Uphold code quality and stability by writing unit and integration tests
• Manage the implementation of new and existing third-party integrations critical for product functionality
• Mentor junior engineers, give constructive feedback, and share your knowledge on design and best practices.

About you:

• Demonstrates deep expertise in Nest.js and Postgres, including strong SQL skills and practical experience working with ORMs
• Solid understanding of architectural patterns like distributed systems and event-based architecture
• Upper-Intermediate level of English; Fluent Ukrainian
• Natural curiosity about technology, constantly exploring new libraries, tools, and trends in the tech world
• Passion for learning and experimentation, often working on personal projects outside of core work responsibilities

Would be a plus:

• Experience with AI tools integrations
• Working with tracing tools, like LangFuse, LangChain, etc.

What you will get at Readdle:

• Customer-centric culture. We put our users at the heart of everything we do. Every team member has the opportunity to engage directly with customers, gaining insights that shape meaningful, delightful experiences for millions worldwide.
• We’re committed to mastery in our craft. We take ownership of our work, decisions, and outcomes, and we see feedback as a catalyst for growth. Every challenge is an opportunity to learn, evolve, and raise the bar.
• Exceptional people, exceptional team. Our greatest strength is our people. We care deeply about each other, work transparently, and celebrate collective success. Together, we build an environment where everyone can do their best work and grow beyond their potential.
• Real impact. We design products that truly matter. Our focus is on delivering tangible value, simplifying complexity, pushing boundaries, and continuously improving how we build and deliver solutions to our users.
• Culture of innovation. We embrace curiosity and creativity in everything we do. Fresh ideas are not just welcomed, they’re expected, celebrated, and turned into real innovations that shape the future of our products and company.

Now is the perfect time to join Readdle on our mission to redefine productivity for millions of users worldwide. Be part of the team behind industry-leading apps like PDF Expert, Scanner Pro, Spark, Calendars and Documents, trusted by professionals and businesses to streamline their workflows.

Join us and play a key role in building the future of productivity.