• Integration of user-facing elements developed by front-end developers with server side logic • Writing reusable, testable, and efficient code • Design and implementation of low-latency, high-availability, and performant applications • Implementation of security and data protection • Integration of data storage solutions • Write highly scaleable, high volume services

• Weiterentwicklung unserer selbstentwickelten Plattform • Entwicklung der webbasierten Plattform mit PHP und Symfony • Dokumentation des Quellcodes • Einbringung von Erfahrungen bei der Konzeption neuer Features • Technischer Ansprechpartner für Junior Engineers

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 Backend Software Engineer, you will be a critical part of our growing company, working on a cross-functional team to implement best practices in technology, architecture, and process. You'll have the chance to work in an open and collaborative environment, receive and give hands-on mentorship and have opportunities to grow and accelerate your career. You love both learning and teaching. In this role, you will be interfacing with design, front-end, analytics, as well as teams outside of Engineering. You enjoy working cross functionally to solve hard problems and make an impact. At Apollo, you strive for quality, and are obsessed with improving quality, automation, and squashing any bugs that sneak through. You have a drive to constantly investigate performance improvements and innovative ideas. Our tech stack: Ruby/RoR, React.js, Typescript, Redux, MongoDB, Elasticsearch, Ansible, Terraform, Grafana, Kibana, Docker, Kubernetes, GCP, GitHub Actions. DAILY ADVENTURES & RESPONSIBILITIES - Design and implement highly scalable backend endpoints - Gather product requirements and write design docs to satisfy product needs - Drive/Lead full lifecycle of software development: product requirements, architecture, solution design, development, quality assurance, and maintenance - Mentor others on best practices and effectively share knowledge - Ability to effectively communicate development progress to the product lead, engineering manager, and other stakeholders - Be comfortable introducing new technologies and new ideas as required - Work effectively as part of a large global team - Attend and engage in scrum ceremony meetings, team parties, and manager 1:1s - Provide feedback to co-workers in written and verbal form and respond to technical and behavioral feedback from managers and peers COMPETENCIES - 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 - Develops services that are highly available and scalable with proper monitoring and alerting in place - Able to up-level the team by sharing knowledge and best practices with the engineering team - Able to deal with ambiguity - Ownership of projects from start to finish. Just because the project has been deployed doesn’t mean it’s done - Organized and able to effectively plan and breakdown large projects into smaller tasks that are easier to estimate and deliver - Lets others speak and seek to understand their viewpoints - A creative and innovative problem solver & previous experience working in an agile, startup environment - Confident in owning your role, and bringing creative ideas to the hands of our users QUALIFICATIONS - Minimum 5 years of industry experience in backend development, at least 1-2 years in senior positions, developing large-scale applications - Experience developing distributed web applications - Your code is comprehensible, well-structured, highly performant - Experience with database modeling (SQL or NoSQL both OK) - Experience with using and designing RESTful services - Strong knowledge of computer science fundamentals, including data structures, algorithms, and object-oriented design - 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 technologies - 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 technologies Must have: Communication Skills, Problem Solving, Proactivity, Team Player, Listening Skills, Creativity and Innovation, Organization and Planning, Dealing with Ambiguity, Ownership of projects from start to finish, Distributed Web Development Nice to have: BS or MS degree in Computer Science, Computer Engineering or similar, GCP, Kubernetes, Docker, Mongo, Redis, Ruby on Rails, Microservices, Machine Learning We are AI NativeApollo.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 ApolloAt 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. Learn more here!

Sprout Social is looking to hire a Staff Software Engineer, Backend to the Engineering team. Why join Sprout’s Engineering team? With collaborative cross-functional teams that span front-end, back-end and site reliability engineering—the Sprout Engineering team is a place to sharpen your craft and solve hard problems with the smartest people in the industry. On a daily basis, we process tens of billions of requests and tens of billions of asynchronous events. We also ingest billions of social messages every day, and ship more than 1,000 production deployments every month. You’ll get to work on a “tech-giant” scale with smaller, supportive teams where every engineer has the chance to make an impact on our company, and our customers. The best part? In our industry, you often have to switch jobs or even companies to learn a new part of a tech stack or business. But at Sprout, our product is a suite, so you just need to move teams. You’re able to diversify your skills, which not only benefits your team—but also your career. What you’ll do - Ensure service excellence and maintain robust, scalable technical foundations, leveraging technologies such as Scala, Python, MySQL, Clickhouse, Redis, Kafka, Qdrant, Solr - Help lead the team through complex product and technical roadmaps, guiding them to consistently successful outcomes. - Work to improve the processes, systems, and tools we use to deliver quality products and champion technical initiatives and direction. - Build processes to proactively identify and address technical issues as part of team delivery or escalate larger initiatives for prioritization with team leadership. - Provide technical mentoring for engineers across the team and facilitate learning through pairing, documentation, and workshops. What you’ll bring We’re looking for a deeply technical, creative, collaborative, pragmatic, highly motivated, and inquisitive leader to join our team in building great software. If you love solving hard problems, delivering and sustaining high-quality software, and confidently guiding your peers to learn from and teach each other, we’d love to talk with you! The minimum qualifications for this role include: - 7+ years experience developing and supporting software in a production environment - 5+ years experience programming in object-oriented languages such as Scala and/or other JVM languages, - 5+ years experience with functional programming paradigms and ecosystems (e.g., Scala Cats, ZIO)" - 3+ years experience leading engineering projects and initiatives, including the design, development, and implementation of distributed systems, ensuring delivery of reliable services, prioritizing technical improvements with cross-functional teams, and/or driving technical vision. - Professional English proficiency in verbal and written communication Additionally, these are the preferred qualifications that would indicate a particularly strong candidate: - 5+ years experience developing and supporting scalable, distributed backend services - 3 years experience working with SQL databases - Professional Polish proficiency in verbal and written communication How you’ll grow Within 1 month, you’ll plant your roots, including:: - Complete Sprout’s New Hire training program alongside other new Sprout team members. - Get acclimated to the team's current Objectives and Key Results, along with future product roadmap priorities. - Learn about our current multi-product Identity and Access Management technical vision. - Deploy and make changes to our production systems. - Become familiar with the team’s current Service Level Agreements (SLAs) that ensure a world-class customer experience, as well as the SLOs and SLIs we use to proactively track our performance against our SLAs. - Collaborate regularly with product managers, product designers, engineers, and other product teams to deliver value to our users. - Embrace regular team feedback on your work through code reviews and pairing. Within 3 months, you will: - Begin operating as the access domain’s technical owner by leading initiatives, coordinating with stakeholders, and assuming responsibility for our quality of service. - Work with product managers, UX developers, back-end and front-end engineers to lead your first feature delivery, with deliverables broken into an MVP and iterative milestones. - Proactively build relationships with members on other teams through active networking and community building. - Decompose work into small, similarly-sized units so that task-level estimation is trivial. - Become an active participant in code reviews and retrospectives, continuously providing guidance and feedback to others. - Foster a positive culture on your teams as an intrinsic side effect of the way you communicate and collaborate. - Work with your team to create and prioritize quarterly team goals. - Be the first line of defense against product outages and bugs while on support duty. Within 6 months, you will: - Design, create, and maintain access platform solutions that execute at internet scale in a cost effective manner. - Apply your expertise to enhance our existing use of monitoring and alerting tools, thereby ensuring we know about problems before our end users or other back-end teams reliant on our platform. - Identify technical debt and performance bottlenecks within our systems, come up with a plan to improve them, and release them to production. - Frequently partner with other engineers to iterate on our existing technical strategy in service of our overall vision. - Lead technical design planning and facilitate peer review for new feature ideas. - Mentor engineers, helping them level up technically. - Author your career growth plan with your manager’s support and work towards it. Within 12 months, you will: - Be the go-to expert of your teams’ systems at the company. - Utilize the cross-organization connections you’ve built to identify areas of need across our platform, and create plans that incorporate big-picture technical alignment with other leaders. - Own cross-organizational projects and architecture, demonstrating project management skills, consensus building, and strong leadership. - Actively mitigate risk of failed delivery and missed deadlines through courageous, transparent communication with colleagues and stakeholders throughout a project life cycle. - Have opportunities to contribute to in-house technical presentations and workshops that share your expertise with large groups of Sprout engineers. - Surprise us! Use your unique ideas and abilities to change your team in beneficial ways that we haven’t even considered yet. Of course, what is outlined above is the ideal timeline, but things may shift based on business needs and other projects and tasks could be added at the discretion of your manager. Our Benefits Program We’re proud to regularly be recognized for our team, product and culture. Our benefits program includes: - Stock Ownership (RSUs): Eligibility for Restricted Stock Units (RSUs) - Generous Paid Time Off: 26 paid days off annually, in addition to bank holidays and extra company-wide "Rest & Recharge" days. - Paid Parental Leave: We support all growing families with 20 weeks of paid leave for birthing parents and 16 weeks of paid leave for non-birthing parents. - Lifestyle Spending Account (LSA): An annual $600 USD fund to support your personal well-being. This can be used for gym memberships, health expenses, hobbies, or other wellness needs. - Remote & Hybrid Work Support: A flexible, remote-first model supported by a one-time $550 USD home office setup stipend and a monthly internet reimbursement. - Mental Health & Well-being: Access to dedicated mental health resources and company-wide wellness programs. - International Travel: Opportunities to travel to our Chicago HQ for team meetups and collaboration. - Kraków Office Perks: A daily 50 zł lunch stipend when you choose to work from our office. *This list is for informational purposes only. Benefit offerings are discretionary and subject to change and do not constitute a contract or guarantee of benefits. Individual base pay is based on various factors, including work location, relevant experience and skills, the responsibility of the role, and job duties/requirements. The base pay range for this role is 29,500 (min) - 40,500 net (max) PLN monthly. The listed ranges represent earning potential in this position. These ranges were determined by a market-based compensation approach; we used data from trusted third-party compensation sources to set equitable, consistent, and competitive ranges. We also evaluate compensation bi-annually, identify any changes in the market and make adjustments to our ranges and existing employee compensation as needed. Whenever possible, we want to provide team members the flexibility to work in the location that makes the most sense for them. If you prefer an office setting, this role may be based in our Kraków location. If you prefer to work remotely from another location within Poland, we will accommodate you as best as possible. If you are based in another location within EMEA, we aren’t able to hire in your location at this time. #LI-REMOTE Sprout Social Inc. and its subsidiaries process personal data submitted through your application to assess your qualifications for employment and to inform our hiring decision and, where applicable, for required governmental reporting. For more information, please review Sprout's Global Applicant Privacy Notice.