Duolingo Logo

Duolingo

Senior Software Engineer, Backend

Posted 2 Months Ago
Be an Early Applicant
Hybrid
New York, NY, USA
183K-247K Annually
Senior level
Hybrid
New York, NY, USA
183K-247K Annually
Senior level
Build and operate reliable, scalable backend services and infrastructure for Duolingo’s advertising systems. Responsibilities include collaborating with product, design, data science, machine learning, and ad operations; designing, developing, releasing, and maintaining backend systems; and owning project priorities and milestones through production. The role requires strong backend fundamentals, systems thinking, and experience with Java, Python, or Kotlin and database technologies.
The summary above was generated by AI

Our mission at Duolingo is to develop the best education in the world and make it universally available. It’s a big mission, and that’s where you come in!

At Duolingo, you’ll join a team that cares about finding innovative solutions to complex technical problems, running countless experiments (300+ at a time!) with our massive user base to make data-driven decisions, and educating our users and employees alike. You’ll have limitless learning opportunities, mentorship and collaboration with world-class minds, and a variety of projects with large scopes — while doing work that’s both fun and meaningful. 

Join our life-changing mission to develop education for our half a billion (and growing!) learners around the world.

We’re looking for backend engineers who have experience building and operating reliable, scalable systems. Your background may be in product engineering, infrastructure, platform engineering, or a combination of these. What matters most is strong backend fundamentals, sound systems thinking, and the ability to take ownership of complex technical problems from design through production.

Below you can find more information about the team we're hiring for:

Language Learning: 

The Language Learning Pillar owns the core learning experience on Duolingo — the lessons and immersive experiences where language learners spend a majority of their time in the app. Our goal is to make these sessions as effective and engaging as possible by continuously improving how we teach through new exercise types, smarter practice of skills, better scaffolding and personalization to help learners build foundational skills in a new language. As an engineering manager in this pillar, you'll lead a team of engineers working on high-impact, cross-functional problems at the intersection of engineering, product, and pedagogy. We're looking for leaders who are passionate about improving how people learn, and who bring strong technical judgment along with the people-management skills to build a high-performing, collaborative team culture.

Platform:

The Platform Pillar ensures that Duolingo’s infrastructure, tools, and AI systems support our mission of delivering a seamless and personalized learning experience. This Pillar powers the technical backbone of our app and enables all other Pillars to thrive.

Growth:

Growth is core to our mission at Duolingo; helping users find and build a habit with language learning is tied to our ability to make the product fun and engaging every single day. We work on a wide variety of features that build and strengthen habits, like streaks, quests, leaderboards, notifications, and are inventing new features to address user needs.

New Subjects:

Over the last few years, Duolingo has expanded beyond language learning into entirely new subjects: Math, Music, and Chess. These products reach millions of daily active users, are growing quickly, and represent a CEO-level bet that Duolingo can become a platform for learning anything.  The objective is to expand Duolingo by doing for new subjects what we have done for language.

 

🧠  You will...

  • Collaborate on software projects with product design and backend aspects
  • Develop, release, and maintain backend services and/or infrastructure
  • Lead individual project priorities, milestones, and ensure we're always shipping

✅  You have...

  • A Bachelor’s degree in Computer Science or a related technical field
  • Strong competencies in data structures, algorithms, and software design
  • Experience programming in Java, Python, or Kotlin
  • Solid understanding of one or more database technologies

 

⭐  Exceptional candidates will have...

  • Industry experience building high-traffic APIs using public cloud providers
  • Experience with industry observability technology, such as OpenTelemetry, Grafana, Prometheus, or DataDog.

The offered salary is dependent upon several factors, including work experience, skills, and internal peer comparisons. The posted range is subject to change in the future. For this role, base salary is supplemented by equity compensation. We encourage you to talk with your recruiter for more information related to compensation for this role!

Salary Range:
$182,800—$247,300 USD

Benefits: Take a peek at how we care for our employees' holistic well-being with our benefits here.
Job Alerts: Sign up for job alerts here.
Accommodations: We will do everything we can within reason to make sure that your interview takes place in an environment that fairly and accurately assesses your skills. If you need assistance or accommodation, please contact [email protected].
Equal Employment Opportunity: Duolingo is proud to be an Equal Employment Opportunity employer. We do not discriminate based upon race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics.
Fraud Warning: Unfortunately, there is a rise in scammers pretending to be real Duolingo employees. Duolingo and our employees will never ask for your Social Security number, bank details, or passport info, and we’ll never ask you to deposit a check, purchase equipment, or exchange money during the interview process. Real Duolingo employees always use an email that ends in @duolingo.com or @recruiting.duolingo.com. Stay alert and double-check these details before sharing any information.
By applying for this position your data will be processed as per the Duolingo Applicant Privacy Notice.

Duolingo New York, New York, USA Office

Our second largest office is located in the bustling financial district of NYC. Fun fact, Duo can often be seen at work from the city streets! If you don't know what I'm talking about, check out our viral videos on TikTok (https://www.tiktok.com/@duolingo?lang=en)!

Similar Jobs

16 Days Ago
Remote or Hybrid
Brooklyn, NY, USA
165K-250K Annually
Senior level
165K-250K Annually
Senior level
Cloud • Digital Media • News + Entertainment • On-Demand
Build and operate Philo’s ML and LLM infrastructure, including AWS and Kubernetes platforms, GPU scheduling, model serving, inference optimization, monitoring, evaluation, experimentation, and CI/CD. The role establishes infrastructure best practices, reliability, security, scalability, and Infrastructure as Code while supporting recommendation, video classification, and agent workloads. It also involves collaborating with engineers and vendors to deploy, instrument, and manage production systems.
Top Skills: AirflowAlbAmazon BedrockAnthropicAWSC++CloudFormationCloudwatchDagsterDatadogDnsDockerDvcElasticacheElbElkFeastFluentdGitlabGoGrafanaHTTPIamInfluxdbJavaScriptJenkinsKubeflowKubernetesLakefsLinuxLitellmMetaflowMlflowNlbNvidia TritonOpenaiPgvectorPineconePrometheusPythonRagRayRdsRoute 53RubySqsTcp/IpTectonTensorrt-LlmTerraformTgiTickTypescriptVllmVpcWeaviateWeights & Biases
25 Days Ago
Easy Apply
Hybrid
New York, NY, USA
Easy Apply
188K-242K Annually
Senior level
188K-242K Annually
Senior level
HR Tech • Payments • Professional Services • Software
Build, deploy, and maintain large-scale backend applications and high-volume, fault-tolerant infrastructure. Own complex projects from discovery through launch, improve system performance, reliability, and scalability, enhance testing and deployment infrastructure, secure sensitive data, and provide technical leadership, mentorship, and cross-functional collaboration.
Top Skills: AWSCircleCIDatadogDockerElasticsearchGitGoJavaScriptKafkaKubernetesMemcachedMySQLRedisRuby On RailsSQLTerraform
Yesterday
Hybrid
New York, NY, USA
230K-270K Annually
Senior level
230K-270K Annually
Senior level
Artificial Intelligence • Machine Learning • Software • Analytics
Build and operate backend platforms powering agentic investigation and machine-learning systems. Responsibilities include agent orchestration, asynchronous workflows, retrieval and knowledge graphs, context and memory management, secure integrations, model deployment, evaluation, observability, and production reliability. The role partners with engineering, data science, product, security, and investigation teams to deliver dependable AI capabilities for fraud, identity, compliance, and risk workflows.
Top Skills: Amazon BedrockAmazon EksAmazon NeptuneAmazon SagemakerAWSCaching SystemsContainerizationElasticsearchEmbeddingsEvent StreamsGoGraph DatabasesGraphragHybrid RetrievalJavaKnowledge GraphsKubernetesLarge Language ModelsLexical SearchMachine LearningMcpModel ServingNeo4JObject StorageObservability PlatformsOpensearchPythonQueuesRelational DatabasesRetrieval-Augmented GenerationSearch PlatformsSemantic SearchTypescriptVector DatabasesVllm

What you need to know about the NYC Tech Scene

As the undisputed financial capital of the world, New York City is an epicenter of startup funding activity. The city has a thriving fintech scene and is a major player in verticals ranging from AI to biotech, cybersecurity and digital media. It also has universities like NYU, Columbia and Cornell Tech attracting students and researchers from across the globe, providing the ecosystem with a constant influx of world-class talent. And its East Coast location and three international airports make it a perfect spot for European companies establishing a foothold in the United States.

Key Facts About NYC Tech

  • Number of Tech Workers: 549,200; 6% of overall workforce (2024 CompTIA survey)
  • Major Tech Employers: Capgemini, Bloomberg, IBM, Spotify
  • Key Industries: Artificial intelligence, Fintech
  • Funding Landscape: $25.5 billion in venture capital funding in 2024 (Pitchbook)
  • Notable Investors: Greycroft, Thrive Capital, Union Square Ventures, FirstMark Capital, Tiger Global Management, Tribeca Venture Partners, Insight Partners, Two Sigma Ventures
  • Research Centers and Universities: Columbia University, New York University, Fordham University, CUNY, AI Now Institute, Flatiron Institute, C.N. Yang Institute for Theoretical Physics, NASA Space Radiation Laboratory

Sign up now Access later

Create Free Account

Please log in or sign up to report this job.

Create Free Account