Senior Backend Engineer - Spark team

Readdle; Warszawa; On-site; PLN 240,000 - 360,000; Full time

Benefits offered by this job

Customer-centric culture

Relentless growth

Exceptional people, exceptional team

Real impact

Culture of innovation

Job summary

A dynamic tech company is seeking a Senior Back End Engineer to architect robust backend services and optimize performance for their flagship products. This role involves building distributed systems and collaborating closely with product teams. Candidates should have a strong proficiency in Golang and experience with distributed systems. The company promotes a customer-centric approach and values innovation and growth. Ideal candidates are self-motivated and able to work collaboratively in a flexible environment.

Qualifications

• Strong background in backend development, including high proficiency in Golang.
• Experience with distributed systems and high-load services.
• Knowledge of relational database systems and key-value stores.
• Familiarity with databases (SQL/NoSQL) and cloud platforms.

Responsibilities

• Build distributed, scalable, and fault-tolerant systems in the cloud using Golang.
• Develop tools for running and monitoring the system and ensure reliable operations at optimal performance.
• Work closely with product manager and client development teams to define architecture and requirements.
• Mentor teammates, conduct code reviews and promote knowledge sharing.

Skills

Backend development

Golang

Distributed systems

Cloud platforms (AWS or GCP)

Kubernetes

Kubernetes basics

AWS or GCP

Product mindset

Architectural thinking

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.

The Spark email app stands as one of our flagship products, designed for various platforms, including iOS, macOS, Android, and Windows. Our mission at Spark has always been to make you love your email experience – we started by making email smart, improved team collaboration, and now we've tackled information overload to make email focused. Our core features are designed to heighten your focus and allow you to create customized workflows that suit your needs.

About the role

As a Senior Back End Engineer, you will architect robust backend services for tasks like database scaling, synchronization across devices, and integration with other services (e.g., calendars); and optimise the performance of critical components. You will contribute to the team's growth by mentoring newcomers, conducting code reviews, and fostering a culture of knowledge sharing.

What you’ll do

• Build distributed, scalable, and fault-tolerant systems in the cloud using Golang.
• Develop tools for running and monitoring the system and ensure reliable operations at optimal performance.
• Work closely with the product manager and client development teams to define architecture, protocols, and requirements for new functionalities.
• Collaborate with the team and contribute to the overall success of the project.

About you

• Strong background in backend development, including high proficiency in Golang
• Experience with distributed systems and high-load services
• Knowledge of relational database systems and key-value stores
• Basic knowledge of Kubernetes
• Experience with cloud platforms like AWS or GCP
• You demonstrate a deep passion for the products you contribute to
• You're great at thinking ahead, foreseeing how your work shapes the user experience
• You know how to deliver product quality in optimal development time
• You have a keen eye for both zooming in on details and seeing the big picture
• You are highly flexible and self-motivated, with the ability to work independently and in a team.

Would be a plus

• Knowledge of data structures and algorithms (DSA)
• DevOps skills
• Familiarity with NoSQL
• Experience in front-end development using modern Javascript frameworks
• Contributions to the open-source community
• Experience with scripting languages like Python, Ruby, Shell

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.
• Relentless growth. 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.