Winter 2026
Quality Assurance Engineer Intern
Updated on 9/12/2026
Ciena
10,001+ employees
Delivers adaptive optical networking services
No salary listed
Edinburgh, UK
In Person
Bachelor's, Master's
 QA & Testing (1) |
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- The candidate must be undergoing an MCA, M. Tech., or B. Tech. in Computer Science, IT, Electronics and Communication, or a similar field.
- The candidate must have experience writing tests in Python or similar dynamic languages.
- The candidate must have knowledge and demonstrated usage of the Linux operating system, preferably Debian.
- The candidate must have knowledge of network routers, switches, routing protocols such as OSPF and BGP, and services such as DHCP and DNS.
- The candidate must understand all stages of the software development lifecycle.
- The candidate must be able to set up and triage networking hardware.
- The candidate must have experience with cloud networks or network virtualization.
- The candidate must have contributed to an open-source project.
- The candidate must be able to analyze and critique software functionality.
- The candidate must be able to describe visible symptoms of a problem and propose alternative approaches to diagnosing the underlying issue.
- The candidate must be able to articulate problems found and investigate problems conscientiously.
- The candidate must be able to work effectively in small teams and independently.
- Complete a placement in the engineering team.
- Help drive the testing and development of the Service Aware Operating System.
- Perform manual and automated testing for new software feature development on IP switching platforms.
- Support customers in developing and deploying virtualized networks.
- Set up and triage networking hardware.
- Knowledge of containers and Kubernetes.
- Experience with automated test frameworks such as Jenkins and Robot Framework.
- Knowledge of the Atlassian toolset, including Bitbucket, Confluence, and Jira.
Ciena designs and sells optical and routing hardware, automation software, and professional services to build adaptive networks for telecom providers, cable operators, governments, and enterprises. Its systems combine physical networking gear with software that automates traffic routing and resource management so networks can adjust in real time to changing demand. It differentiates itself by offering an end-to-end solution—hardware, software, and services—plus a large global customer base and close collaboration with customers and partners. Its goal is to enable richer, more connected experiences by helping customers deploy flexible, scalable networks that meet evolving digital needs.
Company Size
10,001+
Company Stage
IPO
Headquarters
Linthicum, Maryland
Founded
1992
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Simplify's Take
What believers are saying
- September 3, 2026 Q3 revenue hit $1.67 billion, up 37% year over year.
- Backlog reached $8.5 billion and management targets more than $10 billion by year-end.
- e& UAE, hyperscalers, and AI WAN demand keep driving 1.6T deployments.
What critics are saying
- Two customers drove 41.7% of Q3 revenue, exposing Ciena to abrupt procurement swings.
- Management said supply constraints can limit conversion through 2027 and possibly 2028.
- Cisco, Nokia, and Infinera attack Ciena's core optical accounts with broader portfolios.
What makes Ciena unique
- WaveLogic 6 Extreme ships 1.6T coherent optics; Ciena claims 18-month lead on rivals.
- RLS holds roughly 70% share in disaggregated optical line systems, strengthening stickiness.
- August 2026 Toshiba trial validated 1.6 Tb/s quantum-safe traffic on live fiber.
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Benefits
Health Insurance
Dental Insurance
Vision Insurance
401(k) Company Match
Employee Assistance Program (EAP)
Company Paid Holidays
Paid Sick Leave
Vacation Time
Growth & Insights and Company News
6 month growth
↑ 0%1 year growth
↑ 0%2 year growth
↑ 0%Ciena delivered strong fiscal Q3 results, beating analyst expectations with adjusted earnings per share of $2.11 on nearly $1.7bn revenue. The company's backlog grew to $8.5bn, up $800m year-over-year, and is expected to exceed $10bn by year-end. Management forecast 30% revenue growth for fiscal 2027. Despite the positive results, shares fell over 15% in the five days following the report. Investors focused on potential margin normalisation after tariff refund benefits and customer concentration risks, with just two clients accounting for 42% of quarterly revenue. The report may offer insights for investors evaluating optical networking plays, including rivals Lumentum Holdings and Coherent. Whilst Ciena provides optical networking systems, these competitors focus on optical components and transceivers for AI data centres.
Ciena and NetApp delivered strong earnings this week, demonstrating how AI infrastructure demand extends beyond mega-cap stocks. Ciena reported fiscal Q3 adjusted earnings of $2.11 per share, up 215% year-over-year, beating estimates by 21%. Revenue surged 37% to a record $1.67 billion. The optical networking company raised its fiscal 2026 revenue guidance to approximately $6.42 billion, representing roughly 35% growth, with expectations for at least 30% revenue growth in fiscal 2027. NetApp posted fiscal Q1 revenue of $2.02 billion, up 30% year-over-year, beating estimates by nearly 10%. Adjusted earnings jumped 66% to $2.58 per share, surpassing expectations by 21%. All-flash array revenue reached a record $1.31 billion, up nearly 47%. Both companies are benefiting from cloud providers upgrading infrastructure for AI data centres. Despite the results, Ciena shares fell over 10% on component-supply concerns.
New Buy rating for Ciena (CIEN), the Technology giant. Sep. 3, 2026, 08:55 PM In a report released yesterday, Sean O'Loughlin from TD Cowen reiterated a Buy rating on Ciena, with a price target of $400.00. According to TipRanks, O'Loughlin is a 3-star analyst with an average return of 12.0% and a 48.28% success rate. O'Loughlin covers the Technology sector, focusing on stocks such as Ciena, Marvell, and Semtech. In addition to TD Cowen, Ciena also received a Buy from Rosenblatt Securities's Michael Genovese in a report issued yesterday. However, on the same day, Evercore ISI reiterated a Hold rating on Ciena (NYSE: CIEN). Based on Ciena's latest earnings release for the quarter ending May 2, the company reported a quarterly revenue of $1.57 billion and a net profit of $218.22 million. In comparison, last year the company earned a revenue of $1.13 billion and had a net profit of $8.97 million Read More on CIEN:
Ciena (CIEN) stock surges 7% on stellar Q3 results and upgraded forecast. Key highlights. Table of Contents * Ciena shares surged 7% in premarket sessions to $379.85 following better-than-expected Q3 results. * The company reported adjusted EPS of $2.11, marking a 215% year-over-year increase and surpassing the $1.73 consensus estimate. * Quarterly revenue climbed 37% to $1.67 billion, exceeding the $1.64 billion analyst forecast. * Full-year fiscal 2026 revenue guidance was increased to $6.42 billion, representing 35% growth year-over-year at the midpoint. * The company issued Q4 revenue guidance of $1.75 billion, plus or minus $50 million, beating expectations at the midpoint. Shares of Ciena (CIEN) experienced a significant premarket rally on Thursday, climbing 7% to $379.85 after the networking equipment manufacturer delivered impressive fiscal third-quarter results powered by AI-related infrastructure demand. The company's adjusted earnings per share reached $2.11, representing a remarkable 215% surge compared to the 67 cents posted during the same period last year. This performance significantly exceeded the Street's consensus forecast of $1.73. For the quarter that concluded on August 1, revenue totaled $1.67 billion, marking a 37% year-over-year increase. This figure surpassed analyst projections of $1.64 billion, according to FactSet data. On a GAAP basis, earnings per share stood at $1.83. The company's non-GAAP EBITDA reached $411.1 million, reflecting a 160% increase versus the year-ago quarter. The Optical Networking division, which serves as Ciena's primary business unit, generated $1.19 billion in revenue, up from $815.5 million in the prior-year period. This segment contributed more than 71% of total quarterly revenue. Company lifts full-year outlook. Ciena increased its fiscal 2026 full-year revenue projection to $6.42 billion, plus or minus $50 million. At the midpoint, this guidance reflects a 35% year-over-year improvement. Looking ahead to the fourth quarter, management expects revenue of $1.75 billion, plus or minus $50 million. The company anticipates adjusted gross margin around 45%, with adjusted operating margin projected near 20%. CEO Gary Smith attributed the robust performance to artificial intelligence demand. "AI continues to drive compounding waves of network investment," Smith stated, highlighting Ciena's position as the "only pure-play optical systems and interconnects provider." The company disclosed that two clients represented 41.7% of total quarterly revenue. During the quarter, Ciena repurchased approximately 0.4 million shares for $171.7 million under its $1 billion buyback authorization. Recent stock trajectory. While the quarter proved strong, CIEN shares have experienced volatility in recent months. The stock had posted a 51% gain year-to-date through Wednesday's market close, yet remains 43% below its June 2 peak. Shares declined 1.7% in Wednesday's trading session ahead of the earnings announcement. CFO Marc Graff highlighted that enhanced supply chain capacity and improved operational efficiency are enabling the company to "accelerate earnings" in coming periods. The non-GAAP operating margin expanded substantially to 22.5% in the third quarter, compared to 10.7% in the corresponding quarter of the previous year. The Routing and Switching segment produced $164.4 million in revenue, up from $125.9 million year-over-year. Global Services revenue reached $193.6 million versus $160.2 million in Q3 2025. The company has scheduled a live conference call with investors for today, September 3, at 8:30 a.m. Eastern Time to provide additional commentary on the quarterly performance and future expectations. Limited Time Offer Get 3 free stock ebooks. Discover top-performing stocks in AI, Crypto, and Technology with expert analysis. * Top 10 AI Stocks - Leading AI companies * Top 10 Crypto Stocks - Blockchain leaders * Top 10 Tech Stocks - Tech giants
Ciena, an optical networking products supplier, will report its third-quarter fiscal 2026 results on 3 September. The company's stock has already risen 62% this year and may climb further following the earnings release. Ciena has exceeded Wall Street's earnings expectations in each of the past four quarters. For the third quarter, the company has guided for revenue of $1.62 billion, a 33% increase year over year, and a non-GAAP adjusted operating margin of 19%–20%, nearly double last year's 10.7%. Analysts expect earnings of $1.72 per share, representing a 157% year-over-year increase. Goldman Sachs predicts the total addressable market for optical components could grow from $15 billion this year to $154 billion in 2028. Strong demand for optical networking components is driving this growth, as hyperscalers and AI companies invest heavily in data centre infrastructure.