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About the role
<div class="content-intro"><p><img src="https://www.five9.com/sites/default/files/2025-02/five9-logo.svg" alt="" width="100" style="max-width: 100%;"></p>
<p>Join us in bringing joy to customer experience. Five9 is a leading provider of cloud contact center software, bringing the power of cloud innovation to customers worldwide. </p>
<p>Living our values everyday results in our team-first culture and enables us to innovate, grow, and thrive while enjoying the journey together. We celebrate diversity and foster an inclusive environment, empowering our employees to be their authentic selves. </p></div><p><strong><span data-contrast="auto">Job Description:</span></strong><span data-ccp-props="{}"> </span></p>
<p><span data-contrast="auto">As a Sr. Backend Engineer, you will be a key player in our team, responsible for the design, development, and maintenance of our next-generation Billing service. </span><span data-ccp-props="{}"> </span></p>
<p><span data-ccp-props="{}"> </span><strong><span data-contrast="auto">Responsibilities</span></strong><span data-contrast="auto">:</span><span data-ccp-props="{}"> </span></p>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="4" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="1" data-aria-level="1"><span data-contrast="auto">Design, construct, test, and maintain a highly scalable, event-driven billing service.</span><span data-ccp-props="{}"> </span></li>
</ul>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="4" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="2" data-aria-level="1"><span data-contrast="auto">Build and operate ingestion pipelines that consume usage events from Pub/Sub and other upstream sources.</span><span data-ccp-props="{}"> </span></li>
</ul>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="4" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="3" data-aria-level="1"><span data-contrast="auto">Implement metering, rating, aggregation, and reconciliation logic that guarantees correctness and idempotency at scale.</span><span data-ccp-props="{}"> </span></li>
</ul>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="4" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="4" data-aria-level="1"><span data-contrast="auto">Ensure systems meet business requirements, regulatory needs, and industry best practices.</span><span data-ccp-props="{}"> </span></li>
</ul>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="4" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="5" data-aria-level="1"><span data-contrast="auto">Collaborate with product managers, architects, engineering leaders, and test engineers to deliver new billing capabilities.</span><span data-ccp-props="{}"> </span></li>
</ul>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="4" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="6" data-aria-level="1"><span data-contrast="auto">Drive improvements on billing reliability, accuracy, performance, and cost efficiency.</span><span data-ccp-props="{}"> </span></li>
</ul>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="4" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="7" data-aria-level="1"><span data-contrast="auto">Troubleshoot and support the platform in production, including on-call rotations.</span><span data-ccp-props="{}"> </span></li>
</ul>
<p><span data-ccp-props="{}"> </span></p>
<p><strong><span data-contrast="auto">Qualifications:</span></strong><span data-ccp-props="{}"> </span></p>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="3" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="1" data-aria-level="1"><span data-contrast="auto">5+ years of software engineering experience.</span><span data-ccp-props="{}"> </span></li>
</ul>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="3" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="2" data-aria-level="1"><span data-contrast="auto">5+ years of Java backend development, with hands-on experience using Spring Boot.</span><span data-ccp-props="{}"> </span></li>
</ul>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="3" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="3" data-aria-level="1"><span data-contrast="auto">Degree in Computer Science, IT, or similar field; a Master's is a plus.</span><span data-ccp-props="{}"> </span></li>
</ul>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="3" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="4" data-aria-level="1"><span data-contrast="auto">Strong Computer Science fundamentals in design, data structures, algorithms, problem solving, and complexity analysis.</span><span data-ccp-props="{}"> </span></li>
</ul>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="3" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="5" data-aria-level="1"><span data-contrast="auto">Experience designing and implementing RESTful APIs and event-driven services.</span><span data-ccp-props="{}"> </span></li>
</ul>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="3" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="6" data-aria-level="1"><span data-contrast="auto">Strong understanding of event-driven architectures and asynchronous processing.</span><span data-ccp-props="{}"> </span></li>
</ul>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="3" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="7" data-aria-level="1"><span data-contrast="auto">Experience with messaging systems (Pub/Sub, Kafka, or similar) and at-least-once / exactly-once processing semantics.</span><span data-ccp-props="{}"> </span></li>
</ul>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="3" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="8" data-aria-level="1"><span data-contrast="auto">Hands-on experience with the GCP ecosystem (Pub/Sub, GCS, GKE, Cloud SQL, BigQuery, or similar).</span><span data-ccp-props="{}"> </span></li>
</ul>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="3" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="9" data-aria-level="1"><span data-contrast="auto">Experience architecting, developing, and operating internet-scale, distributed, mission-critical services.</span><span data-ccp-props="{}"> </span></li>
</ul>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="3" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="10" data-aria-level="1"><span data-contrast="auto">Prior experience in developing new features and debugging complex issues with minimal supervision.</span><span data-ccp-props="{}"> </span></li>
</ul>
<p><span data-ccp-props="{}"> </span></p>
<p><strong><span data-contrast="auto">Nice-to-have:</span></strong><span data-ccp-props="{}"> </span></p>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="1" data-aria-level="1"><span data-contrast="auto">Previous experience building or operating billing, metering, rating, or invoicing systems.</span><span data-ccp-props="{}"> </span></li>
</ul>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="2" data-aria-level="1"><span data-contrast="auto">Familiarity with file-based data formats such as CSV and Parquet.</span><span data-ccp-props="{}"> </span></li>
</ul>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="3" data-aria-level="1"><span data-contrast="auto">Experience with stream processing frameworks (Apache Beam/Dataflow, Flink, Spark Streaming).</span><span data-ccp-props="{}"> </span></li>
</ul>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="4" data-aria-level="1"><span data-contrast="auto">Previous experience in the Contact Center or Telco industry.</span><span data-ccp-props="{}"> </span></li>
</ul>
<p> </p><div class="content-conclusion"><p><span data-contrast="auto">Five9 embraces diversity and is committed to building a team that represents a variety of backgrounds, perspectives, and skills. The more inclusive we are, the better we are. Five9 is an equal opportunity employer.</span><span data-ccp-props="{"201341983":0,"335559739":160,"335559740":240}"> </span></p>
<hr>
<p><span data-ccp-props="{"201341983":0,"335559739":160,"335559740":240}">View our privacy policy, including our privacy notice to California residents here: <a href="https://www.five9.com/pt-pt/legal" target="_blank">https://www.five9.com/pt-pt/legal</a>. <br></span></p>
<p><span data-ccp-props="{"201341983":0,"335559739":160,"335559740":240}">Note: Five9 will never request that an applicant send money as a prerequisite for commencing employment with Five9.</span></p></div>
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