Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Software Engineer

$170k - $290k

Private Tech

Software Engineer

Cape's platform gives customers end-to-end control of their digital identity, optimizing for resiliency, privacy, and security at every turn. We're transforming how customers sign up, use, and think about their mobile phones and the privacy implications associated with it. Customers are protected at every level of the communications stack – from the mobile device, through contested infrastructure, to the core of the network itself.

As a Software Engineer at Cape, your mission is to provide connectivity without compromise. Your charge is to build a system that enables resilient, global connectivity with a security & privacy first mind-set that separates our users from the legacy telecom ecosystem. This includes everything from building a best-in-class signaling firewall to identify & mitigate malicious signaling attacks that compromise users' most personal communications, to detection of fake base-stations (cell-site simulators), to detecting and preventing SPAM & Smishing campaigns, and being transparent and alerting users when they may be actively targeted by hackers or nation states.

We're hiring engineers who are passionate about solving real-world problems, personal privacy, and empowering peers to be autonomous. If you're motivated to develop reliable, highly performant, and scalable systems, and to design robust APIs and primitives, this role offers the opportunity to make a significant impact on our products and the people who use them. Your day-to-day will constantly change and be filled with ambiguity, but everything you work on has a high impact.

Here Are Some Ways You'll Make An Impact
  • You Will Design And Integrate: Build the core telecommunications infrastructure that provides secure cellular service to our users, ensuring end-to-end data integrity.

  • Own The Lifecycle: Take full ownership of the software lifecycle—from problem discovery to solution delivery—for foundational components of our telecommunications stack.

  • Set The Bar: Maintain high coding standards by developing guidelines, participating actively in code reviews, and fostering a culture of continuous improvement and knowledge sharing.

  • Enable Scale: Build reliable, performant, and scalable systems that enable other product teams to build robust applications without requiring deep domain expertise in the underlying infrastructure.

What We Value
  • Autonomy: A proven ability to learn continuously, work independently, and make decisions with minimal supervision.

  • Collaboration: Experience brainstorming and iterating alongside product managers and designers.

  • Pragmatism: The ability to move quickly while building for the long term. You take a thoughtful, practical approach to solving complex problems, considering tradeoffs and avoiding over-engineering.

  • Adaptability: Comfort working in a constantly evolving environment with dynamic objectives and direct user iteration.

  • Empathy: The ability to work collaboratively with both technical and non-technical teammates, understanding how technical decisions impact the end user.

  • Mission-Driven: A deep-seated belief in the importance of digital privacy and security. You understand that the code we ship has real-world consequences and are driven to build systems that protect and empower users.

  • Clearance: Active US Security clearance or the eligibility and willingness to obtain one is beneficial, but not required.

Are You The Candidate We Are Looking For?
  • 4+ years of professional software engineering experience.

  • A strong foundation in Computer Science, Engineering, or a related technical field, demonstrated through both professional experience and academic pursuits.

  • Fluency in a modern backend language such as Golang, Rust, Java/Kotlin, or Python.

  • A firm grasp of algorithms, data structures, cloud infrastructure, and distributed systems.

  • Strong written and verbal communication skills, including the ability to iterate quickly with teammates, incorporate feedback, and hold a high bar for quality.

We offer competitive compensation that is geo-adjusted based on your location, along with meaningful equity so you share in the value you help create. Salary range for this role in NYC is $170K - $290K depending on level, experience, and interview performance.

Our benefits include:

  • 401(k) match

  • 100% coverage of medical, dental, and vision premiums for you and your dependents

  • 12 weeks paid parental leave (for all parents, no waiting period)

  • Stipends for

    • Family-forming needs

    • Gender-affirming care

  • Unlimited PTO

Our Culture & Values
  • We hire excellent people, give them outsized responsibility, and trust them to execute. Every person at Cape has a proven track record of tackling hard problems and winning.

  • We believe that personal privacy and national security are not at odds, and that they can be reconciled through strong technology.

  • We believe companies exist to build awesome things and take care of the people who build them, so we offer top-tier healthcare, 401(k) matching, and a generous vacation policy that our team actually uses to recharge.

  • We believe that a stronger company and a better product are built by people from all walks of life. We hire without regard to race, color, ancestry, religion, sex, national origin, sexual orientation, gender identity, age, marital status, disability, or Veteran status. If you are great at what you do, you belong here.

How To Apply

Click the link below to apply.

We reserve the right to make use of any unsolicited resumes received from outside recruiting agencies and / or individual recruiters without being responsible for payment of any fees asserted from the use of unsolicited resumes.

We are an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, or national origin, and without regard to disability or status as a protected veteran, or any other status protected by law.

Vacancy posted 1 day ago
Similar jobs that could be interesting for youBased on the Software Engineer in Arlington, VA vacancy
  •  ...WORK This senior role fosters collaboration with other senior engineers for the development of advanced data analytics solutions and...  ...and opportunities. This Program is seeking a full stack software engineer to develop, maintain and enhance complex and diverse... 
    Suggested

    Lockheed Martin

    Falls Church, VA
    1 day ago
  •  ...exceptional professionals for this role. JOB DESCRIPTION We have an exciting and rewarding opportunity for you to take your software engineering career to the next level. As a Software Engineer III at JPMorgan Chase within the Network Services team, you serve as a... 
    Suggested

    J.P. Morgan

    Washington DC
    12 days ago
  •  ...Full Stack Software Engineer Location: Merrifield, VA on site Type: Full Time Complete Data Solutions (CDS) is a leading data engineering and analytics company focused on providing our federal government clients with innovative solutions to complex data engineering... 
    Suggested
    Full time

    Navstar

    Falls Church, VA
    1 day ago
  • $132k - $198k

     ...Full Stack Software Engineer Washington, District of Columbia, United States Anduril Industries is a defense technology company with a mission to transform U.S. and allied military capabilities with advanced technology. By bringing the expertise, technology, and... 
    Suggested
    Full time
    Work experience placement

    anduril

    Washington DC
    2 days ago
  •  ...Full Stack Software Engineer Rune Technologies builds mission-critical software for military logistics and sustainment. Our flagship product is TyrOS, an AI-enabled logistics command and control platform that gives commanders a single, real-time operating picture of... 
    Suggested
    Full time
    For contractors
    Work at office

    Rune Technologies

    Arlington, VA
    2 days ago
  •  ...place. Job Description We are looking for a Full Stack Engineer to help us build and scale the Quartermaster product-the operator...  ...(Preferred) ~2-4 years of professional full-stack software engineering experience. ~ Strong command of React and modern... 
    Work at office
    Flexible hours

    Quartermaster AI Inc

    Arlington, VA
    7 hours ago
  •  ...Full Stack Software Engineer Agile Empowerment Technologies (AET), a division of Brandes Associates, is seeking a Full Stack Software Engineer with 5+ years of experience to support the continued development, modernization, and sustainment of secure mission software... 
    Local area
    Remote work
    Work from home
    Relocation

    Brandes Associates

    Washington DC
    2 days ago
  •  ...Software Engineer - Full Stack Developer This is an exciting opportunity to join a rapidly growing company that provides Artificial Intelligence systems and software engineering services/solutions to DoD and Federal clients. We seek a Full-Stack Engineer with a dual... 
    Full time
    Local area
    Remote work
    Flexible hours

    Integrity Defense Solutions Inc

    Washington DC
    1 day ago
  •  ...combine secure infrastructure, cleared talent, and mission‑ready software to meet evolving defense challenges. Our services include...  ...Mission Focused Expertise: From veteran leadership to cleared engineers, our people understand both the technology and the mission. About... 
    Relocation
    Flexible hours

    Federated IT

    Washington DC
    4 days ago
  • $151k - $159.4k

     ...application due to a disability, contact this employer to ask for an accommodation or an alternative application process. Full Stack Software Engineer Washington, DC, US 5 days ago Requisition ID: 1343 Salary Range: $151,000.00 To $159,400.00 Annually PID: 26-14-09P-028-AAU... 
    Full time
    Temporary work
    Local area

    E-InfoSol LLC

    Washington DC
    4 days ago
  • $125k

     ...our partnerships with clients. Our close-knot team of highly cleared engineers, analysts, and program managers represent some of the best talent locally available. The Senior Full Stack Software Engineer will support the development of the FBI FDP system using a Postgres... 
    Flexible hours

    SW Complete

    Washington DC
    3 days ago
  • $125k - $175k

     ...better care. Requirements As a Senior Full-Stack Engineer at Commence, you will play a key role in designing, developing...  ...work closely with cross-functional teams to deliver high-quality software solutions that are scalable, secure, and efficient. This role... 
    Full time
    Remote work

    Commence Corporation

    Washington DC
    3 days ago
  •  ...Kadiak, LLC, a Koniag Government Services company , is seeking a Senior Full-Stack Software Engineer with a Top-Secret security clearance to support Kadiak and our government customer in Washington, DC. We offer competitive compensation and an extraordinary... 
    Local area
    Flexible hours

    Koniag

    Washington DC
    2 days ago
  • $140k - $150k

     ...Zachary Piper Solutions is seeking a Senior Full Stack Software Engineer to support a company focused on federal law enforcement and mission-critical data platforms. This is an on-site role in Washington, D.C . The Senior Full Stack Software Engineer will support... 

    Piper Companies

    Washington DC
    1 day ago
  • $74.2k - $123.6k

     ...departments, including Brand & Events, Communications, Customer Care, Engineering & Product, Finance, Human Resources, Legal, Marketing &...  ...Sales. Why This Role Matters We’re looking for a Full‑Stack Software Engineer I to help modernize the core platforms that power our... 
    Full time
    Part time
    Flexible hours

    Nashville Public Radio

    Washington DC
    2 days ago
  • $112k - $179k

     ...Senior Full-Stack Software Engineer / Active Top Secret Job Locations US-VA-Arlington Requisition ID 2026-167391 Position Category Information Technology Clearance Top Secret/SCI Responsibilities Peraton is seeking... 
    Contract work
    Remote work
    Shift work

    Peraton

    Arlington, VA
    2 days ago
  •  ...Senior Full Stack Software Engineer The Senior Full Stack Software Engineer is responsible for designing, developing, building, testing and deploying web tier applications. Responsibilities: Able to work independently and offer insights and analysis on existing... 

    Software Technology Inc

    Washington DC
    2 days ago
  •  ...think they come on site Java /Python Developer will help support the API Platform implementation. Senior Full-Stack Software Engineer responsible for building web applications using Python, Java, and many other cutting-edge technologies. Responsibilities:... 

    3B Staffing LLC

    Washington DC
    2 days ago
  •  ...Full Stack Software Engineer LOCATION Tysons, VA 22182 CLEARANCE TS/SCI Full Poly (Please note this position requires full U.S. Citizenship) KEY SUMMARY We are looking for a highly skilled Full Stack Software Engineer to join our team and contribute to the development... 
    Temporary work
    For contractors
    Immediate start
    Flexible hours

    Cymertek

    McLean, VA
    19 hours ago
  • $168.1k - $227.4k

    As a Software Development Engineer for Amazon eXperiences & Upskilling (AXU), you will be responsible for delivering the tools and processes required to ensure ensure every experience built with Amazon technologies naturally makes customers feel ‘this was designed for people... 
    Full time
    Internship
    Flexible hours

    Amazon.com Services LLC

    Arlington, VA
    2 hours ago
  •  ...Actifai is seeking experienced senior full-stack software engineers. The Company Actifai is an artificial intelligence company. We help our customers, broadband and telecom providers, optimize their high-value, high-leverage decisions. Typically, this includes... 
    Work at office
    Immediate start
    Remote work

    Actifai

    Washington DC
    3 days ago
  •  ...Job Description We are looking for a Senior Full Stack Engineer to help us build and scale the Quartermaster product-the operator...  ...Qualifications (Preferred) ~5+ years of professional full-stack software engineering experience. ~ Strong command of React and modern... 
    Work at office
    Flexible hours

    Quartermaster AI Inc

    Arlington, VA
    19 hours ago
  • $149.24k - $185k

     ...professionals for this role. JOB DESCRIPTION DESCRIPTION: Duties: Design, develop and implement software solutions. Solve business problems through innovation and engineering practices. Involved in all aspects of the Software Development Lifecycle (SDLC) including... 
    Full time

    J.P. Morgan

    Washington DC
    13 days ago
  •  ...About the job Software Engineer - Platform Arlington, VA, or New York, NY (on-site/hybrid) The platform: a privacy-first mobile carrier built from the ground up, running its own network rather than a layer over legacy infrastructure. Secure cellular service... 

    CyRAD Solutions

    Arlington, VA
    2 days ago
  • $3,000 per month

     ...In this role you will: • Analyze user requirements to derive software design and performance requirements • Design and code new...  ...analyzing system performance standards, confer with users or system engineers; analyze systems flow, data usage and work processes; and... 

    Lockheed Martin

    Washington DC
    3 days ago
  • $89.2k - $209.5k

     ...Senior Software Development Engineer - AI Data Platform Oracle's Forward Deployed Engineer (FDE) team is hiring a Senior Software Development Engineer - AI Data Platform to help global customers unlock the full potential of their data. You will provide expert architectural... 
    Temporary work
    Flexible hours

    Oracle

    Washington DC
    1 day ago
  • $100k

     ...visa, walmart lab etc to name a few. Currently, we are looking for entry-level software programmers, Java full stack developers, Python/Java developers, data analysts/data engineers/data scientists, machine learning engineers for full time positions with clients. Who... 
    Full time
    H1b

    SynergisticIT

    Washington DC
    2 days ago
  • $106k - $169k

     ...set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Software Engineer II - Backend/Platform Agentic AI Who is Mastercard? Mastercard is a global technology company in the payments industry.... 
    Full time
    Part time
    Worldwide
    Flexible hours

    MasterCard

    Arlington, VA
    1 day ago
  • $132k - $212k

     ...Senior Software Engineer - Backend/Platform Agentic AI Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we're helping build a sustainable economy where everyone can prosper. We support a wide range... 
    Full time
    Part time
    Worldwide
    Flexible hours

    Dynamic Yield

    Arlington, VA
    7 hours ago
  • $190k - $230k

     ...Senior Software Engineer, AI Platform At HackerOne, we're revolutionizing offensive security by combining human intelligence with artificial intelligence to help organizations build a safer internet. As a Senior Software Engineer on our AI Platform team, you will contribute... 
    Apprenticeship
    Work at office
    Local area
    Remote work
    Flexible hours
    1 day per week

    HackerOne

    Washington DC
    1 day ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Software Engineer. Be the first to apply!