A

AT&T

Runs US wireless and fiber internet networks

Senior Applications Developer

Full-TimeUpdated on 10/23/2026Deadline 11/10/26
$98.1k - $228.6k
Senior
Bachelor's
Chantilly, VA, USA
In Person
Software EngineeringFull-Stack Engineering
No H1B Sponsorship
US Top Secret Clearance Required

About the job

Requirements
  • A bachelor's degree in systems engineering, Computer Science, Applied Science, Electrical Engineering, Mathematics, Information Assurance, Information Security System Engineering, or a related discipline from an accredited college or university, a developer nanodegree, or equivalent work experience is required. Five years of additional systems engineering experience may substitute for a bachelor's degree.
  • At least five years of experience designing, developing, implementing, and maintaining application systems and solutions of similar scope, type, and complexity.
  • Experience operating within Agile framework methodologies and the software development lifecycle, including design, implementation, and deployment.
  • Proficiency as a full-stack developer with experience in front-end and back-end languages such as Python, Java, Node.js, JavaScript, HTML, CSS, SOAP and RESTful APIs, SQL, PHP, and JSON.
  • Familiarity with or prior experience in Session Initiation Protocol (SIP)-based real-time IP communication applications, including development and maintenance of communications-based solutions integrating real-time communication technologies such as voice, video, and messaging, and/or mobility applications.
  • Experience architecting software solutions involving user interfaces, data and database management, and server-side logic.
  • Experience building web applications and designing and integrating RESTful APIs to enable data flow or information exchange between applications and systems.
  • Hands-on experience with databases such as MySQL, PostgreSQL, and MongoDB, including data schema design and data interactions supporting applications.
  • Experience working with source code version control systems such as Git to track coding revisions and support collaboration.
  • Familiarity with cybersecurity best practices that ensure data integrity and security and protect applications from vulnerabilities, including authentication, authorization, and encryption.
  • Ability to troubleshoot application issues, inefficiencies, and performance problems using analysis, debugging, and troubleshooting methods, and to diagnose, resolve, and optimize applications using rigorous logic.
  • Strong communication skills to collaborate with a cross-functional engineering team within the Sponsor’s organization.
  • Willingness to travel occasionally to other Sponsor locations within the Washington Metro Area as required.
  • Demonstrated commitment to professional development and continuous learning to keep current with technology and develop skills and expertise.
  • Ability to obtain or hold the required TSSCI clearance with polygraph.
Responsibilities
  • Code and test new software applications to meet business requirements and user needs.
  • Design and develop front-end user interfaces that facilitate user experience.
  • Develop server-side logic, create and manage databases, and integrate APIs with the front end.
  • Design, implement, and maintain databases to store and retrieve data efficiently.
  • Maintain and update existing applications to fix bugs, improve performance, and ensure compatibility with new technologies.
  • Collaborate with stakeholders to gather and analyze requirements and user stories, and create and maintain comprehensive documentation.
  • Conduct code reviews, unit testing, and integration testing, and provide technical support and troubleshooting assistance.
  • Work with cross-functional teams to deliver projects on time, manage development projects, and stay updated with industry trends and technologies.
  • Design, develop, test, and maintain specialized applications to meet current and future customer mission requirements.
  • Work with a matrixed team of systems engineers, database administrators, and software developers to design, install, configure, implement, and maintain complex solutions supporting customer mission objectives.
Desired Qualifications
  • Industry certifications in web design and programming languages such as HTML, CSS, JavaScript, C#, and Python, including Oracle Certified Associate/Professional, Java SE; Microsoft Full-Stack Developer Professional Certificate; PCEP/PCAP/PCPP; JSE/JSA/JSPA/JSPB; SIP School Certified Associate (SSCA); and Oracle Database SQL Certified Associate/EDB PostgreSQL/MongoDB.
  • Experience or working knowledge of system virtualization, VMware, or equivalent.
  • Experience with cloud services and platforms such as AWS, Azure, or GCP.
  • Experience administering Linux/Unix systems such as Red Hat, Rocky, or Debian.
  • Understanding of HTML, CSS, JavaScript, and other web technologies.
  • Familiarity with the SIP protocol and communication application frameworks such as Asterisk.
  • Firm understanding of network protocols, TCP/IP, and VoIP technologies and concepts.

About the company

AT&T sells mobile phone plans and home internet to households and businesses across the US, and runs a wireless business in Mexico. Its business rests on two networks: a nationwide 5G wireless network and a fiber internet network that is replacing its old copper phone lines. Companies and government agencies also buy private networks, security and connectivity services from its business unit. Most revenue comes from monthly service plans plus device installment payments, and the company pushes customers to combine phone and home internet. AT&T Inc. began in 1983 as Southwestern Bell, took the AT&T name after buying its former parent in 2005, and is based in Dallas, Texas.

Company Size

10,001+

Company Stage

IPO

Headquarters

Dallas, Texas

Founded

1983

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Simplify Jobs

Simplify's Take

What believers are saying

  • Fiber is AT&T's main growth bet: it targets over 40 million fiber locations by December 2026.
  • Fiber growth includes acquisitions: AT&T's February 2026 purchase of Lumen's consumer fiber unit added over 1 million customers.
  • AT&T is investing in offices: a $1.35 billion Plano campus, announced January 2026, will house nearly 6,000 staff.

What critics are saying

  • Debt stays high for years: AT&T expects about three years after its EchoStar purchase to restore its 2.5x debt target.
  • The workforce is shrinking: AT&T's headcount fell from about 141,000 to 133,000 in the year to December 2025.
  • FirstNet depends on Washington: a federal authority oversees AT&T's first-responder contract and needs renewal from Congress.

What makes AT&T unique

  • AT&T runs the national first-responder network: its FirstNet federal contract lasts until 2042.
  • AT&T bought more airwaves in July 2026: its $23 billion EchoStar deal added spectrum across about 400 markets.
  • AT&T sells phone and home internet together: 42.5% of its advanced internet homes also used AT&T wireless.

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Benefits

  • Health Insurance
  • Dental Insurance
  • Vision Insurance
  • 401(k) Retirement Plan
  • 401(k) Company Match
  • Paid Vacation
  • Paid Sick Leave
  • Paid Holidays
  • Paid Parental Leave
  • Adoption Assistance
  • Disability Insurance
  • Life Insurance

Growth & Insights and Company News

6 month growth

-7%

1 year growth

-7%

2 year growth

-7%
Yahoo Finance
Oct 26th, 2026
AT&T and T-Mobile step up AI security spending as AT&T eyes $18B free cash flow

AT&T and T-Mobile are spending more to protect customer data and networks from AI-related security threats, executives from both companies told Reuters. They said fully self-running networks are still years away. T-Mobile chief technology officer John Saw said the company is improving threat monitoring and working with vendors to close security holes quickly. T-Mobile's breaches in 2021 and 2023 affected over 100 million customer accounts. AT&T chief technology officer Jeremy Legg said some risks lie outside the company's control. AT&T uses encryption, multi-factor authentication, and human oversight of data access. In the third quarter, AT&T's free cash flow was about $5 billion, and capital spending was $5.6 billion.

Yahoo Finance
Oct 25th, 2026
AT&T speeds up copper network shutdown, targeting $4B in annual savings by 2028

AT&T is speeding up the shutdown of its copper network as customers leave legacy services. Only 1% of its customers still use copper-based voice services, down from 5% in December 2024. The carrier has shut 100 wire centres and decommissioned copper services in over 500 communities across 18 states, covering 1.3 million locations. It expects to complete the process in another 1,500 communities over the next year. Legacy service revenue fell 25% year over year in the third quarter. Chief financial officer Pascal Desroches said AT&T remains on pace for $4 billion in annual cost savings by the end of 2028. AT&T plans to shut most of its copper network by 2030. It added 416,000 fibre customers in the quarter, up 44.4% year over year.

Yahoo Finance
Oct 23rd, 2026
Verizon yields 6.26% and keeps raising its dividend, while AT&T's 4.88% payout stays frozen

Verizon looks like the stronger income stock than AT&T, according to a comparison of the two telecoms' payouts. Verizon yields about 6.26% and has raised its dividend 19 years in a row. AT&T yields about 4.88% on a payout frozen since its 2022 cut. Verizon raised its quarterly dividend to $0.7075 from $0.69. AT&T pays $0.2775 a quarter and plans to hold $1.11 annualised through 2028. Verizon paid $5.9 billion in first-half dividends against $10.2 billion of free cash flow, about 58%. Its EBITDA margin hit 40.1% as it cut phone subsidies. AT&T's leverage rose after its $23 billion EchoStar spectrum purchase. It does not expect to return to 2.5x until 2029.

Yahoo Finance
Oct 23rd, 2026
How $75K in six high-yield picks could generate $13.7K a year in passive income

Splitting $75,000 evenly across six high-yield holdings would produce $13,693.20 a year in income, an 18.26% blended yield, according to 24/7 Wall St. That is well above a $10,000 annual target. Each position gets $12,500. Two covered-call exchange-traded notes supply most of the income: USOI adds $6,476.26 and GLDI adds $3,393.28. The rest comes from Herzfeld Credit Income Fund ($1,702.27), Altria ($774.17), Main Street Capital ($741.33), and AT&T ($605.90). The notes' payouts swing widely each month, so the margin above $10,000 acts as a buffer if option premiums shrink. USOI's monthly payments have ranged from $0.4265 to $7.4743.

Yahoo Finance
Oct 23rd, 2026
AT&T shares fall 6.4% despite Q3 beat, as outlook raise stems from lower depreciation

AT&T shares fell 6.4% on October 21, 2026, after the company reported third-quarter results and raised its full-year profit outlook. The S&P 500 rose 0.6% that day, while Verizon fell 2.2% and T-Mobile 2.5%. The higher outlook came mainly from lower depreciation under held-for-sale accounting for AT&T Mexico, which the company has agreed to sell. AT&T now expects full-year adjusted EPS of about $2.40, up from $2.25 to $2.35. Adjusted EPS was $0.65, against a consensus of $0.61. Revenue matched expectations at $32.3 billion. AT&T kept its free cash flow forecast at $18 billion and its adjusted EBITDA growth forecast at 3% to 4%. It warned that fourth-quarter growth will suffer from higher marketing and customer acquisition costs. Average revenue per fiber customer fell 4%, and a similar decline is expected next quarter.