Senior Fullstack Engineer (FE-heavy) Remote, Poland

Apollo; Remote; PLN 240,000 - 320,000; Full time

Job summary

A leading SaaS company in Poland is seeking a Senior Fullstack Engineer to work on features for their extensive lead database. This role focuses on improving data quality and developing customer products using a tech stack that includes Ruby/RoR, React.js, and GCP. The ideal candidate has 6+ years in frontend and 3+ in backend development, with strong analytical skills and a drive towards continuous improvement. Join a dynamic team dedicated to innovative technology solutions and fostering collaboration.

Benefits

Opportunities for professional growth

Collaborative team environment

Support for experimentation and innovation

Qualifications

• 6+ years of industry experience in frontend development and 3+ in backend.
• Proven software engineering skills, including test-driven development.
• Strong system design fundamentals and experience building scalable systems.

Responsibilities

• Work closely with product and design teams on core product initiatives.
• Produce clean, well-structured code with documentation.
• Communicate development progress and blockages effectively.

Skills

Frontend Development

Backend Development

Problem-solving

Analytical Skills

Software Design

Communication

Tools

Ruby/RoR

React.js

Typescript

MongoDB

Elasticsearch

Docker

Kubernetes

GCP

Job description

Apollo.io is the leading go-to-market solution for revenue teams, trusted by over 500,000 companies and millions of users globally, from rapidly growing startups to some of the world's largest enterprises. Founded in 2015, the company is one of the fastest growing companies in SaaS, raising approximately $250 million to date and valued at $1.6 billion. Apollo.io provides sales and marketing teams with easy access to verified contact data for over 210 million B2B contacts and 35 million companies worldwide, along with tools to engage and convert these contacts in one unified platform. By helping revenue professionals find the most accurate contact information and automating the outreach process, Apollo.io turns prospects into customers. Apollo raised a series D in 2023 and is backed by top-tier investors, including Sequoia Capital, Bain Capital Ventures, and more, and counts the former President and COO of Hubspot, JD Sherman, among its board members.

This is a Permanent role ("Umowa o pracę") and not a B2B contract

Your Role & Mission

As a Senior Fullstack Engineer at Apollo, you will work with Apollo’s 200M+ Leads data and build features on top of it. You will be responsible for improving the quality of our data and building customer-facing products by coming up with innovative, yet simple, solutions and implementing them end-to-end. This involves building highly scalable web services, an excellent understanding of software design and databases, and a solid grasp of frontend engineering. You will be a critical part of our growing company, working on a cross-functional team to implement and drive best practices in technology, architecture, and process. In this role, you will interface with a product, design, software engineers, and members on teams outside of Engineering. At Apollo, we are obsessed with improving quality, automation, and squashing any bugs that sneak through, and we expect the same from you. You have a drive to constantly investigate performance improvements and generate innovative ideas.

Our tech stack: Ruby/RoR, React.js, Typescript, Redux, MongoDB, Elasticsearch, Ansible, Terraform, Grafana, Kibana, Docker, Kubernetes, GCP, GitHub Actions.

Daily Adventures and Responsibilities

• Work closely with product, design and engineering team to design and contribute to core product initiatives
• Produce "clean" and well-structured code, with detailed specifications. This means that your code is commented, well structure, readable and comes with documentation
• Effectively communicate development progress or blockers to the product lead, engineering manager, and other stakeholders
• Work effectively as part of a large global team
• Attend and engage in stand-ups, team meetings, and manager 1:1s
• Provide and receive constructive feedback and praise to co-workers in verbal and written form; respond and react to technical and behavior feedback from managers and peers
• Proactively acts without being told what to do. Able to identify areas of improvement and driving best practices to deliver high quality, performant, and scalable solutions
• Ability to take ownership over everything you ship; you'd never call code "released" until you’re confident it’s correct
• You usually communicate effectively, clearly, concisely and in an audience-oriented way in written and verbal form both technical and non technical subjects, to your teammates. You actively listen to others and ensures they are understood. You pay attention to nonverbal communication
• You help your teammates overcome obstacles, resolve blockers, and complete work tasks. You give or share credit where due
• You deliver praise and constructive feedback to your team, teammates, and manager in a useful manner
• You actively seek out feedback from your teammates and manager, and works to use feedback that you receive as a tool for growth
• Confident in owning your role, and bringing creative ideas to the hands of our users
• 6+ years of industry experience in frontend development and at least 3+ years in backend development
• Experience in Java, Python, Ruby/RoR, Elixir, Erlang, Golang, Scala or C++,
• Strong system design fundamentals and experience building scalable systems
• Good understanding of software development lifecycle
• Strong analytical and problem-solving skills
• Proven software engineering skills in production environment, including test-driven development
• Your code is comprehensible, well-structured, and highly performant
• Proven experience leveraging AI tools to enhance software development processes, including code generation, debugging, and productivity optimization. Candidates should demonstrate fluency in integrating AI-driven solutions into their workflows and a willingness to stay current with emerging AI technology

Nice to have:

• Experience with Sidekiq
• Experience with Cypress in writing meaningful tests
• Experience with Spark or other distributed processing frameworks
• Experience with Google Cloud Platform, Databricks, Snowflake, MongoDB, Terraform, Ansible
• Understanding of Design Systems and experience using them for frontend development

We are AI Native

Apollo.io is an AI-native company built on a culture of continuous improvement. We’re on the front lines of driving productivity for our customers—and we expect the same mindset from our team. If you're energized by finding smarter, faster ways to get things done using AI and automation, you'll thrive here.

Why You’ll Love Working at Apollo

At Apollo, we’re driven by a shared mission: to help our customers unlock their full revenue potential. That’s why we take extreme ownership of our work, move with focus and urgency, and learn voraciously to stay ahead.

We invest deeply in your growth, ensuring you have the resources, support, and autonomy to own your role and make a real impact. Collaboration is at our core—we’re all for one, meaning you’ll have a team across departments ready to help you succeed. We encourage bold ideas and courageous action, giving you the freedom to experiment, take smart risks, and drive big wins.

If you’re looking for a place where your work matters, where you can push boundaries, and where your career can thrive—Apollo is the place for you.

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