Censys is building the most credible, robust map of the Internet through IP scanning, DNS lookups, web crawling, ingestion of millions of certificates, and new algorithms. We are a true security startup with midwestern roots and we believe that by increasing human intuition and understanding of networks, operations, and security practices, organizations can protect themselves from vulnerability and risk. We are looking for high-energy, action-oriented people who are not afraid of challenges and interested in helping build a product and culture that we’re proud of for years to come. 


Censys is seeking a full-stack/front-end developer to help develop the application that presents our wealth of data to the customers. Through our Search interface, customers are able to construct complex queries to search for hosts and certificates and view details about assets. We want to provide improved workflows for customers and also enhance the way the data is represented with historical data and information about different scan observations. 


The Search application is primarily written in Python but is transitioning to Go. Familiarity with Typescript and React is a plus. We don’t expect specific familiarity with our stack, experience with any common web development languages, frameworks together with experience of relational databases is enough to be successful.


This job is a good fit if you:

  • Thrive in a fast paced startup environment where changes happen quickly
  • Contribute to our culture of learning. Take ownership of issues, admit mistakes, and work to improve over time.
  • Make informed decisions by combining empirical evidence with domain expertise and good judgement
  • Operate and contribute effectively as part of a team where we work together to solve problems


This job is not good fit if you:

  • Think engineering’s job is done after the code is delivered.
  • You are more motivated by technology than understanding customer problems
  • Don’t enjoy helping and mentoring your colleagues around you


What you will bring:

  • 6+ years experience in building web applications professionally
  • You can write efficient backend code in Python and Go, interacting with a service-based RPC architecture, such as gRPC.
  • You can write, document, and support customer-facing APIs through API-first design and a focus on helping costumes integrate directly with our data.
  • You are comfortable interacting with Kubernetes and diagnosing operational issues.
  • You are knowledgeable with front-end frameworks such as React and can help manage front-end applications based on TypeScript.
  • You can write SQL to retrieve or manipulate data.
  • Familiarity with CI/CD processes.
  • An understanding of SEO and Core web vitals.
  • Familiarity with NoSQL databases like Elasticsearch, Redis, and other similar technologies.
  • Familiarity with User Authentication and Authorization concepts, such as OAuth, JWTs, 2FA, RBAC, Google Zanzabar, etc.
  • You write understandable, testable code with an eye towards maintainability.
  • You are a strong communicator. Explaining complex technical concepts to other engineers, designers, sales people, and content marketers is no problem for you.


What you will do:

  • Lead development for customer-facing web applications using Python, Go and React, including a new front-end application and features to support showing users pertinent information about hosts, certificates, and risks. This includes supporting front-end features useful for threat-hunting and quickly pivoting and investigating our data sets through the UI.
  • Write code that communicates with internal services to build the data models that are presented to the users. Much of this code is written in Python but is being transitioned to Go.
  • Partner with product, design, and data engineering to translate Censys data into new product features.
  • Design automated solutions for building, testing, monitoring, and deploying applications in a continuous integration environment that uses Kubernetes and Google Cloud Platform.
  • Occasionally support the Customer Success and Sales Engineering teams with customer or partnership calls to provide technical expertise.


We value diversity and are committed to creating an inclusive environment for all employees. Censys is an equal opportunity employer.

Apply for this Job

* Required

Voluntary Self-Identification

For government reporting purposes, we ask candidates to respond to the below self-identification survey. Completion of the form is entirely voluntary. Whatever your decision, it will not be considered in the hiring process or thereafter. Any information that you do provide will be recorded and maintained in a confidential file.

As set forth in Censys’s Equal Employment Opportunity policy, we do not discriminate on the basis of any protected group status under any applicable law.

Race & Ethnicity Definitions

If you believe you belong to any of the categories of protected veterans listed below, please indicate by making the appropriate selection. As a government contractor subject to the Vietnam Era Veterans Readjustment Assistance Act (VEVRAA), we request this information in order to measure the effectiveness of the outreach and positive recruitment efforts we undertake pursuant to VEVRAA. Classification of protected categories is as follows:

A "disabled veteran" is one of the following: a veteran of the U.S. military, ground, naval or air service who is entitled to compensation (or who but for the receipt of military retired pay would be entitled to compensation) under laws administered by the Secretary of Veterans Affairs; or a person who was discharged or released from active duty because of a service-connected disability.

A "recently separated veteran" means any veteran during the three-year period beginning on the date of such veteran's discharge or release from active duty in the U.S. military, ground, naval, or air service.

An "active duty wartime or campaign badge veteran" means a veteran who served on active duty in the U.S. military, ground, naval or air service during a war, or in a campaign or expedition for which a campaign badge has been authorized under the laws administered by the Department of Defense.

An "Armed forces service medal veteran" means a veteran who, while serving on active duty in the U.S. military, ground, naval or air service, participated in a United States military operation for which an Armed Forces service medal was awarded pursuant to Executive Order 12985.

Form CC-305

OMB Control Number 1250-0005

Expires 05/31/2023

Voluntary Self-Identification of Disability

Why are you being asked to complete this form?

We are a federal contractor or subcontractor required by law to provide equal employment opportunity to qualified people with disabilities. We are also required to measure our progress toward having at least 7% of our workforce be individuals with disabilities. To do this, we must ask applicants and employees if they have a disability or have ever had a disability. Because a person may become disabled at any time, we ask all of our employees to update their information at least every five years.

Identifying yourself as an individual with a disability is voluntary, and we hope that you will choose to do so. Your answer will be maintained confidentially and not be seen by selecting officials or anyone else involved in making personnel decisions. Completing the form will not negatively impact you in any way, regardless of whether you have self-identified in the past. For more information about this form or the equal employment obligations of federal contractors under Section 503 of the Rehabilitation Act, visit the U.S. Department of Labor’s Office of Federal Contract Compliance Programs (OFCCP) website at www.dol.gov/ofccp.

How do you know if you have a disability?

You are considered to have a disability if you have a physical or mental impairment or medical condition that substantially limits a major life activity, or if you have a history or record of such an impairment or medical condition.

Disabilities include, but are not limited to:

  • Autism
  • Autoimmune disorder, for example, lupus, fibromyalgia, rheumatoid arthritis, or HIV/AIDS
  • Blind or low vision
  • Cancer
  • Cardiovascular or heart disease
  • Celiac disease
  • Cerebral palsy
  • Deaf or hard of hearing
  • Depression or anxiety
  • Diabetes
  • Epilepsy
  • Gastrointestinal disorders, for example, Crohn's Disease, or irritable bowel syndrome
  • Intellectual disability
  • Missing limbs or partially missing limbs
  • Nervous system condition for example, migraine headaches, Parkinson’s disease, or Multiple sclerosis (MS)
  • Psychiatric condition, for example, bipolar disorder, schizophrenia, PTSD, or major depression

1Section 503 of the Rehabilitation Act of 1973, as amended. For more information about this form or the equal employment obligations of Federal contractors, visit the U.S. Department of Labor's Office of Federal Contract Compliance Programs (OFCCP) website at www.dol.gov/ofccp.

PUBLIC BURDEN STATEMENT: According to the Paperwork Reduction Act of 1995 no persons are required to respond to a collection of information unless such collection displays a valid OMB control number. This survey should take about 5 minutes to complete.