D

Duolingo

Language learning app with gamified lessons

iOS Software Engineer 2 - iOS, Growth

Full-TimeUpdated on 10/14/2026
CN¥673.7k - CN¥911.5k+ Equity compensation
Junior, Mid
Bachelor's
Beijing, China
In PersonRelocation to Beijing, China is required.
Software EngineeringMobile Engineering

About the job

Requirements
  • A bachelor's degree in Computer Science or a related technical field.
  • A solid foundation in computer science, with strong competencies in data structures, algorithms, and software design.
  • Two to five years of experience programming in Swift.
  • Relocation to Beijing, China is required.
Responsibilities
  • Collaborate with product managers and designers to drive user growth.
  • Develop, release, and maintain native iOS applications, primarily in Swift.
  • Contribute to code reviews and collaborate across teams to ensure quality and scalability.
Desired Qualifications
  • Strong proficiency in Swift, with proven ability to build and maintain production-level applications.
  • Strong technical knowledge of iOS mobile application development for iPhone and iPad using Swift with Cocoa Touch and related frameworks.
  • Experience designing clean and maintainable APIs.
  • Proficiency in both spoken and written English.

About the company

Duolingo creates an online language learning platform that offers bite-sized, gamified lessons. It uses a freemium model: core features are free with in-app advertisements, while a premium subscription unlocks an ad-free experience and additional features. The app works by presenting short lessons that reinforce language skills through interactive exercises and rewards, designed to keep users engaged and learning daily. Compared with competitors, Duolingo leverages a very large global user base and a well-known brand, highlighted by being the most downloaded education app in App Store history and a leading education app by revenue in 2019, along with a visible emphasis on workplace culture. Its overarching goal is to make high-quality education universally accessible to people around the world.

Company Size

1,001-5,000

Company Stage

IPO

Headquarters

Pittsburgh, Pennsylvania

Founded

2011

Get referred to Duolingo

See people who can refer or advise you

Simplify Jobs

Simplify's Take

What believers are saying

  • October 6, 2026 Global Taco Day spans Taco Bell U.S., Canada, UK, Australia.
  • September 28, 2026 Zalando Plus offered four months of Super Duolingo to 20 million members.
  • September 21, 2026 Brawl Stars crossover pushed Duo into Supercell's gaming audience.

What critics are saying

  • 2026 AI tutors from Speak and Praktika erode Duolingo's speaking-practice moat.
  • February 27, 2026 shares tumbled 22% after slower bookings growth guidance.
  • If GenAI tutors own conversation practice, Duolingo becomes a gamified marketing shell.

What makes Duolingo unique

  • Duolingo turns learning into a mascot-driven consumer brand, not just software.
  • Zalando Plus and Taco Bell paired with Duolingo in September-October 2026.
  • Its 98 courses and nearly 40 languages create unmatched top-of-funnel breadth.

Help us improve and share your feedback! Did you find this helpful?

Benefits

  • Medical, dental, and vision for employees as well as eligible partners and dependents
  • Mental health benefits such as therapy sessions and coaching to support you to be your best self
  • Fertility benefits to support your family planning journey
  • Fully paid parental and adoption leave
  • Fully paid subscription to Care.com and paid backup days for dependents and your fur family
  • 401(k) with generous match and immediate vesting
  • 20 days of PTO, with two additional weeks off for winter break
  • Yearly professional development stipend
  • Transportation reimbursement for however you get to work
  • Lunch prepared daily by our in-house chefs
  • Annual international retreat for all full-time employees
  • On-site gym and massages

Growth & Insights and Company News

Headcount

6 month growth

1%

1 year growth

3%

2 year growth

-3%
Associated Press
Oct 19th, 2026
Duolingo investors face December 7 deadline to seek lead role in class action over DAU slowdown

A class action lawsuit has been filed against Duolingo (NASDAQ: DUOL) on behalf of investors that bought its Class A common stock between May 2, 2025 and February 26, 2026, law firm Kaplan Fox & Kilsheimer LLP announced. The complaint alleges Duolingo made false and misleading statements that hid the harm that more ads, subscription upsells, and AI-generated content did to daily active user growth. The stock fell 25% on November 6, 2025, 8.5% on January 12, 2026, and 14% on February 27, 2026. Those drops followed weak results showing slower user growth and the departure of the company's chief financial officer. Investors who want to seek the lead plaintiff role must move the court by December 7, 2026.

GlobeNewswire
Oct 18th, 2026
Bronstein, Gewirtz & Grossman LLC urges Duolingo, Inc. investors to act: Class Action filed alleging investor harm.

Bronstein, Gewirtz & Grossman LLC urges Duolingo, Inc. investors to act: Class Action filed alleging investor harm. NEW YORK, Oct. 18, 2026 (GLOBE NEWSWIRE) - Bronstein, Gewirtz & Grossman, LLC, a nationally recognized investor-rights law firm, announces that a class action lawsuit has been filed against Duolingo, Inc. (NASDAQ: DUOL) and certain of its officers. "Our practice focuses on restoring investor capital and ensuring corporate accountability to uphold market integrity," said Peretz Bronstein. This lawsuit seeks to recover damages against Defendants for alleged violations of the federal securities laws on behalf of all persons and entities that purchased or otherwise acquired Duolingo securities between May 2, 2025 and February 26, 2026, both dates inclusive (the "Class Period"). Such investors are encouraged to join this case by visiting the firm's site: bgandg.com/cases/duolingo-inc-duol-class_action_lawsuit. Duolingo Case Details The Complaint alleges that throughout the Class Period, Defendants failed to disclose that: (1) Daily Active User ("DAU") growth rates were being leveraged against deliberately added user friction in the form of significant increases in ad volume, subscription tier upsells, and worsened product quality, and Duolingo understood that any amount of user friction would cause users to leave the app and, ultimately, negatively impact DAU growth rates; (2) the Company's rigorous A/B testing demonstrated that increased friction in the free user experience was having negative impacts on DAU growth rates; (3) Duolingo's quickly generated AI content was worsening the quality of the Company's product offerings, negatively impacting the user experience and user trends, and threatening the sustainability of the Company's financial performance; and (4) Duolingo's constant A/B testing informed the Company that its monetization push and lower-quality, rapidly generated AI content were degrading the Duolingo product experience and the value proposition of its subscription tiers. What's Next for Duolingo Investors? A class action lawsuit has already been filed. If you wish to review a copy of the Complaint, you can visit the firm's site: bgandg.com/cases/duolingo-inc-duol-class_action_lawsuit. or you may contact Peretz Bronstein, Esq. or his Client Relations Manager, Nathan Miller, of Bronstein, Gewirtz & Grossman, LLC at 917-590-0911. If you suffered a loss in Duolingo you have until December 7, 2026, to request that the Court appoint you as lead plaintiff. Your ability to share in any recovery doesn't require that you serve as lead plaintiff. No Cost to Duolingo Investors We, Bronstein, Gewirtz & Grossman LLC, represent investors in class actions on a contingency fee basis. That means we will ask the court to reimburse us for out-of-pocket expenses and attorneys' fees, usually a percentage of the total recovery, only if we are successful. Why Bronstein, Gewirtz & Grossman, LLC for Duolingo Securities Class Action? Bronstein, Gewirtz & Grossman, LLC is a nationally recognized firm that represents investors in securities fraud class actions and shareholder derivative suits. Our firm has recovered hundreds of millions of dollars for investors nationwide. More at www.bgandg.com "Our practice centers on restoring investor capital and ensuring corporate accountability, which serves to uphold the essential integrity of the marketplace," said Peretz Bronstein, Founding Partner of Bronstein, Gewirtz & Grossman, LLC. Contact Info Peretz Bronstein, Esq. or Nathan Miller Bronstein, Gewirtz & Grossman, LLC 917-590-0911 | [email protected] Attorney advertising. Prior results do not guarantee similar outcomes.

Little Black Book (LBB)
Oct 15th, 2026
Corner Table Creative introduces hospitality-inspired agency model and welcomes 3 hires.

Corner Table Creative introduces hospitality-inspired agency model and welcomes 3 hires. Corner Table Creative welcomes Jessica Killian, Marissa Osowsky and Alexa Baldacci Editorial Series People moves, company launches, account wins and other business news. Photo credit: Ripp Photography Co. Corner Table Creative has been rolling out a new agency model inspired by its hospitality ethos, formally structuring teams into front of house and back of house roles, alongside the hiring of three new directors to support the shift. The model mirrors how high-performing hospitality groups operate: front of house teams, made up of client experience and brand strategists, focusing on client relationships, strategic oversight, and experience design, while back of house teams, creatives, designers, creators and producers concentrate on execution, content creation, and production across organic and paid social. The approach is designed to maintain the hybridity the agency is known for while clarifying responsibilities to scale output without compromising creative quality or client service, a growing challenge for social-first agencies as demand for always-on content accelerates. The new hires include: * Jessica Killian, creative director (back-of-house) * Marissa Osowsky, client experience director (front-of-house) * Alexa Baldacci, client experience director (front-of house) Killian most recently joined from ChukMedia where she worked on over 20+ different brands including Palmer's Skincare, growing their TikTok from 0-380K, Bausch + Lomb portfolio brands, developing Lumify's first Super Bowl spot, Wet Brush and Olipop. Prior to that Jessica Killian was a senior art director at Vayner Media on Olay and Chase Sapphire. Osowski joins from TBWA/Chiat/Day where she was a business director on Goldman Sachs, Carnival and Henkel, prior to that she was at Arts & Letters Creative Co. working on Google. Baldacci joins Corner Table Creative from Duolingo and NBC/Peacock where she led performance marketing strategy. The agency partnered with New Best Friend Co. for recruitment. "This structure allows us to grow intentionally while protecting what matters most: strong client partnerships and really memorable creative," said Rachel Brandt, co-founder and CEO of Corner Table Creative. "By clearly defining how teams show up, and valuing both sides of the house equally, we're building a more sustainable and effective agency model." Madeline Meade, co-founder and CCO added, "We are thrilled to bring Jess, Marissa and Alexa in to help lead our teams at this time of pivotal growth and set the tone for our new model as we enter the next chapter of Corner Table Creative." The restructure and hires are also a result of recent rapid growth for the award-winning agency. With new clients that include Match, Starbucks and OXO, the agency has grown to a 43-person team, 30 client partners, and will exceed $12M in revenue this year.

PR Newswire
Oct 12th, 2026
Bronstein, Gewirtz & Grossman LLC urges Duolingo, Inc. investors to act: Class Action filed alleging investor harm.

Bronstein, Gewirtz & Grossman LLC urges Duolingo, Inc. investors to act: Class Action filed alleging investor harm. Oct 12, 2026, 12:00 ET NEW YORK, Oct. 12, 2026 /PRNewswire/ - Bronstein, Gewirtz & Grossman, LLC, a nationally recognized investor-rights law firm, announces that a class action lawsuit has been filed against Duolingo, Inc. (NASDAQ: DUOL) and certain of its officers. This lawsuit seeks to recover damages against Defendants for alleged violations of the federal securities laws on behalf of all persons and entities that purchased or otherwise acquired Duolingo securities between May 2, 2025 and February 26, 2026, both dates inclusive (the "Class Period"). Such investors are encouraged to join this case by visiting the firm's site: bgandg.com/cases/duolingo-inc-duol-class_action_lawsuit. Duolingo Case Details The Complaint alleges that throughout the Class Period, Defendants failed to disclose that: * Daily Active User ("DAU") growth rates were being leveraged against deliberately added user friction in the form of significant increases in ad volume, subscription tier upsells, and worsened product quality, and Duolingo understood that any amount of user friction would cause users to leave the app and, ultimately, negatively impact DAU growth rates; * the Company's rigorous A/B testing demonstrated that increased friction in the free user experience was having negative impacts on DAU growth rates; * Duolingo's quickly generated AI content was worsening the quality of the Company's product offerings, negatively impacting the user experience and user trends, and threatening the sustainability of the Company's financial performance; and * Duolingo's constant A/B testing informed the Company that its monetization push and lower-quality, rapidly generated AI content were degrading the Duolingo product experience and the value proposition of its subscription tiers. What's Next for Duolingo Investors? A class action lawsuit has already been filed. If you wish to review a copy of the Complaint, you can visit the firm's site: bgandg.com/cases/duolingo-inc-duol-class_action_lawsuit. or you may contact Peretz Bronstein, Esq. or his Client Relations Manager, Nathan Miller, of Bronstein, Gewirtz & Grossman, LLC at 917-590-0911. If you suffered a loss in Duolingo you have until December 7, 2026, to request that the Court appoint you as lead plaintiff. Your ability to share in any recovery doesn't require that you serve as lead plaintiff. No Cost to Duolingo Investors We, Bronstein, Gewirtz & Grossman LLC, represent investors in class actions on a contingency fee basis. That means we will ask the court to reimburse us for out-of-pocket expenses and attorneys' fees, usually a percentage of the total recovery, only if we are successful. Why Bronstein, Gewirtz & Grossman, LLC for Duolingo Securities Class Action? Bronstein, Gewirtz & Grossman, LLC is a nationally recognized firm that represents investors in securities fraud class actions and shareholder derivative suits. Our firm has recovered hundreds of millions of dollars for investors nationwide. More at www.bgandg.com "Our practice centers on restoring investor capital and ensuring corporate accountability, which serves to uphold the essential integrity of the marketplace," said Peretz Bronstein, Founding Partner of Bronstein, Gewirtz & Grossman, LLC. Contact Info Peretz Bronstein, Esq. or Nathan Miller Bronstein, Gewirtz & Grossman, LLC 917-590-0911 | [email protected] Attorney advertising. Prior results do not guarantee similar outcomes. SOURCE Bronstein, Gewirtz & Grossman, LLC

GlobeNewswire
Oct 10th, 2026
NASDAQ: DUOL: Kessler Topaz Meltzer & Check, LLP announces the filing of a securities fraud Class Action lawsuit against Duolingo, Inc.

NASDAQ: DUOL: Kessler Topaz Meltzer & Check, LLP announces the filing of a securities fraud Class Action lawsuit against Duolingo, Inc. Did you buy DUOL Class A common stock between May 2, 2025 and February 26, 2026? Affected DUOL Investor Summary * Who: Duolingo, Inc. (NASDAQ: DUOL) * What: Securities fraud class action lawsuit filed * Class Period: May 2, 2025 through February 26, 2026 * Deadline to Seek Lead Plaintiff Status: December 7, 2026 * Key Lawsuit Allegations: Material misstatements and/or omissions concerning the company's monetization and growth strategies * Investor Action: Contact Kessler Topaz Meltzer & Check, LLP (www.ktmc.com) for recovery options RADNOR, Pa., Oct. 10, 2026 (GLOBE NEWSWIRE) - Kessler Topaz Meltzer & Check, LLP (www.ktmc.com), a nationally recognized securities litigation law firm, informs investors that a securities fraud class action lawsuit has been filed against Duolingo, Inc. (Duolingo) (NASDAQ: DUOL) on behalf of those who purchased or acquired Duolingo Class A common stock between May 2, 2025 and February 26, 2026, inclusive. The lawsuit is filed in the United States District Court for the Western District of Pennsylvania and is captioned City of Dearborn Heights Act 345 Police & Fire Retirement System v. Duolingo, Inc., No. 26-cv-02197 (W.D. Pa.). Investors have until December 7, 2026, to file for lead plaintiff status. CONTACT KESSLER TOPAZ TO DISCUSS YOUR LEGAL RIGHTS: If you purchased or acquired Duolingo Class A common stock and have lost money on your investment, please provide your information here: https://www.ktmc.com/duol-duolingo-inc-class-action-lawsuit?utm_source=Globe&utm_medium=pressrelease&utm_campaign=duol&mktm=PR You can also contact attorney Jonathan Naji, Esq. by calling (484) 270-1453 or by email at [email protected]. There is no cost or obligation to speak with an attorney. DUOLINGO, INC. CLASS ACTION LAWSUIT - COMPLAINT ALLEGATION SUMMARY: The complaint alleges that, throughout the Class Period, Defendants made materially false and/or misleading statements, as well as failed to disclose material facts about the company's business, operations, and prospects. Specifically, Defendants misrepresented and/or failed to disclose that: (1) daily active user ("DAU") growth rates were being leveraged against deliberately added user friction in the form of significant increases in ad volume, subscription tier upsells, and worsened product quality, and Duolingo understood that any amount of user friction would cause users to leave the app and, ultimately, negatively impact DAU growth rates; (2) Duolingo's rigorous A/B testing demonstrated to the company that increased friction in the free user experience, including its monetization push and rapidly generated low-quality AI content, was having negative impacts on DAU growth rates; (3) Duolingo's quickly generated AI content was worsening the quality of Duolingo's product offerings, negatively impacting the user experience and user trends, and threatening the sustainability of the company's financial performance; and (4) as a result of the foregoing, Defendants' statements about the company's business, operations, and prospects were materially false and misleading and/or lacked a reasonable basis at all relevant times. Why did Duolingo's Stock Drop? On November 5, 2025, Duolingo reported its third quarter financial results, revealing a decline in DAU growth to 36%, down from 49% in the first quarter. Duolingo also revealed that the company would reverse course on its monetization push and instead focus on user growth going forward. On this news, Duolingo's stock price fell 25%, to close at $193.74 on November 6, 2025. Then, on January 12, 2026, Duolingo announced that its CFO had resigned. Duolingo also provided limited preliminary fourth quarter operating metrics, showing DAU growth of only 30%. On this news, Duolingo's stock price fell another 8.5%, to close at $161.74 on January 12, 2026. Finally, after the market closed on February 26, 2026, Duolingo announced its fourth quarter financial results, confirming the slowed DAU growth and revealing that the "small financial impact" from its strategic shift was anything but. Specifically, Duolingo revealed that its 2026 DAU growth would come in at a meager 20% and be accompanied by lower bookings and less profitability. On this news, Duolingo's stock price fell 14%, to close at $101 on February 27, 2026. WHAT DUOLINGO, INC. INVESTORS CAN DO NOW: * File to be lead plaintiff by December 7, 2026. * Contact Kessler Topaz for a free case evaluation. All representation is on a contingency fee basis, there is no cost to you. * Retain counsel of choice or take no action. THE LEAD PLAINTIFF PROCESS FOR DUOLINGO, INC. INVESTORS: Duolingo investors have the opportunity to lead the lawsuit. Such investors may, no later than December 7, 2026, seek to be appointed as a lead plaintiff representative of the class through Kessler Topaz Meltzer & Check, LLP or other counsel, or may choose to do nothing and remain an absent class member. A lead plaintiff is a representative party who acts on behalf of all class members in directing the litigation. The lead plaintiff is usually the investor or small group of investors who have the largest financial interest and who are also adequate and typical of the proposed class of investors. The lead plaintiff selects counsel to represent the lead plaintiff and the class and these attorneys, if approved by the court, are lead or class counsel. Your ability to share in any recovery is not affected by the decision of whether or not to serve as a lead plaintiff. Kessler Topaz Meltzer & Check, LLP encourages Duolingo investors to contact the firm for more information. ABOUT KESSLER TOPAZ MELTZER & CHECK, LLP: Kessler Topaz Meltzer & Check, LLP is a leading U.S. plaintiff-side law firm focused on securities-fraud class actions and global investor protection. The firm represents individual investors as well as institutions, such as major pension funds, asset managers, and international investors. Kessler Topaz has led some of the largest recoveries in securities litigation and has been recognized by peers and the legal media with numerous accolades, including being recognized in Chambers & Partners USA 2026 as a Band 1 Top Firm in Securities and Class Actions, Legal 500's Tier 1 Rankings for Securities and M&A Litigation, The National Law Journal's Plaintiff's Hot List and Trailblazers in Plaintiffs' Law, BTI Consulting Group's Honor Roll of Most Feared Law Firms, The Legal Intelligencer's Class Action Firm of the Year, Lawdragon's Leading Plaintiff Financial Lawyers, and Law360's Titans of the Plaintiffs Bar. The firm operates globally with offices in Pennsylvania and California. Kessler Topaz has recovered over $25 billion for our clients and the classes they represent. The complaint in this matter was not filed by Kessler Topaz. Jonathan Naji, Esq. (484) 270-1453 280 King of Prussia Road Radnor, PA 19087 [email protected] May be considered attorney advertising in certain jurisdictions. Past results do not guarantee future outcomes.