Senior Full Stack Developer (Hybrid/On-Site)

Suitland, MD
Full Time
Technology
Experienced
Job Title: Senior Full Stack Developer (Hybrid/On-Site)

Location: Suitland, MD

Company: BLN24

About Us: We find strength in teamwork-a better you is a better us
BLN24 is an award-winning Management Consulting Firm that supports the U.S. Federal Government in successfully achieving their mission and goals. Our service and solutions delivery start with understanding each client’s end-state, and then seamlessly integrating within each Agency’s organization to improve and enhance strategic and technical operations and deployments.

Position Overview:
BLN24 is seeking a hands-on Senior Full Stack Developer to support the U.S. Census Bureau in sustaining and modernizing applications that deliver critical economic data to the public. This role combines full-stack software engineering, Linux and on-premises infrastructure experience, data-oriented development, automated testing, and legacy modernization.

The ideal candidate is curious about how the current system works, willing to investigate root causes, and comfortable working within Census IT constraints. You will help reduce technical debt, support migration to RHEL 10 on bare-metal infrastructure, and deliver secure, maintainable solutions across the application stack. This is a working technical role: success requires someone who can think strategically, make sound engineering decisions, and personally dive into the code, configuration, testing, and troubleshooting.

How You Work:
  • Problem-first and tool-agnostic. You can abstract the problem, evaluate constraints and tradeoffs, and select the right approach rather than forcing a preferred tool or framework.
  • Grounded in engineering fundamentals. You may use AI-assisted tools responsibly, but you can design, code, test, review, and troubleshoot without relying on AI as a substitute for technical understanding.
  • Curious and investigative. You seek to understand current system behavior, technical debt, operational pain points, and the reasons behind existing design decisions.
  • Hands-on and accountable. You are willing to roll up your sleeves, work through ambiguity, and carry solutions from analysis through implementation and support.
  • Independent and collaborative. You can own work with limited direction while communicating clearly and contributing effectively within a cross-functional team.


Key Responsibilities:
 
  • Design, develop, test, modernize, and maintain full-stack applications using Python, JavaScript, HTML, CSS, and modern frontend technologies.
  • Assess legacy applications and technical debt; define and implement incremental modernization, refactoring, dependency, and compatibility strategies aligned with the migration to RHEL 10 bare-metal environments.
  • Administer, configure, deploy, and troubleshoot applications and supporting services in Red Hat Enterprise Linux and other Linux-based, on-premises environments.
  • Automate infrastructure and application configuration using Ansible or comparable configuration-management approaches.
  • Develop and maintain RESTful APIs, backend services, data-processing components, and PostgreSQL queries or data models.
  • Build responsive, usable frontend experiences using Vue.js, React, Angular, or comparable frameworks, with attention to sound UI/UX practices.
  • Create and maintain automated unit, integration, and end-to-end frontend tests using tools such as Playwright or comparable testing suites.
  • Use GitLab for source control, code review, issue tracking, collaborative workflows, and CI/CD pipeline execution.
  • Apply secure coding, performance, reliability, observability, and maintainability practices throughout the software lifecycle.
  • Investigate complex defects and production issues across application, operating-system, infrastructure, and data layers; identify root causes and implement durable fixes.
  • Collaborate with developers, data scientists, analysts, product owners, infrastructure teams, and Census stakeholders to translate mission needs and technical constraints into working solutions.
  • Produce clear technical documentation, participate in code and design reviews, and help improve team engineering standards and practices.

Required Qualifications:
  • Bachelor’s degree in Computer Science, Information Technology, Engineering, Data Science, or a related field, or equivalent relevant education and professional experience.
  • At least 6 years of professional software-development experience, including substantial hands-on full-stack development responsibility.
  • Strong Python and JavaScript development skills, including experience building and maintaining production applications.
  • Experience with at least one modern frontend framework such as Vue.js, React, or Angular, together with practical UI/UX implementation skills.
  • Linux administration and IT infrastructure experience in on-premises or bare-metal environments; practical experience with RHEL or a comparable enterprise Linux distribution.
  • Experience modernizing legacy applications, reducing technical debt, refactoring code, upgrading dependencies, or resolving operating-system and platform compatibility issues.
  • A solid foundation in data science or data-oriented software development using open-source languages, libraries, and development practices.
  • Experience with Git-based development workflows; GitLab experience strongly preferred.
  • Experience creating automated tests, including unit tests and browser-based or frontend tests; Playwright or comparable experience preferred.
  • Experience with infrastructure or configuration management tools such as Ansible.
  • Experience with RESTful APIs, relational databases, and SQL; PostgreSQL experience preferred.
  • Demonstrated ability to analyze ambiguous technical problems, compare solution options, and make pragmatic decisions within operational and customer constraints.
  • Strong written and verbal communication skills and the ability to work effectively both independently and as part of a team.
  • Experience working in an Agile delivery environment.
  • U.S. citizenship and the ability to obtain and maintain a Public Trust clearance

Preferred Qualifications:
  • Direct experience supporting RHEL major-version upgrades or migrations, especially migration to RHEL 10 in bare-metal environments.
  • Experience with geospatial, GIS, or mapping technologies such as PostGIS, GeoPandas, OpenLayers, Leaflet, QGIS, ArcGIS, or comparable tools.
  • Experience with data visualization libraries such as D3.js or comparable open-source visualization frameworks.
  • Experience with GitLab CI/CD, containerization, or container runtimes such as Docker or Podman.
  • Experience supporting mission-critical data products or applications in a federal or similarly regulated environment.
  • Active Census Public Trust clearance.

What Success Looks Like
Within this role, success means understanding the existing environment before prescribing a solution; delivering working, well-tested improvements; reducing technical debt without disrupting mission operations; and becoming a trusted technical partner who can move fluidly between code, data, infrastructure, testing, and team collaboration.

What BLN24 brings to the Game:
BLN24 benefits are game changing. We like our team to play hard and that means they need to be taken care of — physically, financially, and emotionally. We make sure to keep them in the game by giving them access to generous medical, dental, and vision plans.
  • You can join one of the fastest growing companies headquartered in the Washington DC Metro Area.  We give you the opportunity to work in different sectors, so you have the chance at variety while maintaining stability.
  • Flexibility at BLN24 allows each individual the opportunity to balance quality work and their personal lives. Depending on projects, we allow remote working opportunities so you can always be in the game no matter where you call home.
BLN24 is an Equal Opportunity Employer. We believe people are our strength and understand diverse talents are key to our success. We are an equal opportunity employer and place a high value on diversity and inclusion at our company. We do not discriminate on the basis of any protected attribute, including race, religion, color, national origin, gender, sexual orientation, gender identity, gender expression, age, marital or veteran status, pregnancy or disability, or any other basis protected under applicable law. In accordance with applicable law, we make reasonable accommodations for applicants' and employees' religious practices and beliefs, as well as any mental health or physical disability needs.
 
Share

Apply for this position

Required*
We've received your resume. Click here to update it.
Attach resume or Paste resume
Attach resume as .pdf, .doc, .docx, .odt, .txt, or .rtf (limit 5MB) or Paste resume

Paste your resume here or Attach resume file

To comply with government Equal Employment Opportunity and/or Affirmative Action reporting regulations, we are requesting (but NOT requiring) that you enter this personal data. This information will not be used in connection with any employment decisions, and will be used solely as permitted by state and federal law. Your voluntary cooperation would be appreciated. Learn more.
Invitation for Job Applicants to Self-Identify as a U.S. Veteran
  • 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.
Veteran status


Voluntary Self-Identification of Disability
Voluntary Self-Identification of Disability Form CC-305
OMB Control Number 1250-0005
Expires 05/31/2026
Why are you being asked to complete this form?

We are a federal contractor or subcontractor. The law requires us to provide equal employment opportunity to qualified people with disabilities. We have a goal of having at least 7% of our workers as people with disabilities. The law says we must measure our progress towards this goal. To do this, we must ask applicants and employees if they have a disability or have ever had one. People can become disabled, so we need to ask this question at least every five years.

Completing this form is voluntary, and we hope that you will choose to do so. Your answer is confidential. No one who makes hiring decisions will see it. Your decision to complete the form and your answer will not harm you in any way. If you want to learn more about the law or this form, 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?

A disability is a condition that substantially limits one or more of your “major life activities.” If you have or have ever had such a condition, you are a person with a disability. Disabilities include, but are not limited to:

  • Alcohol or other substance use disorder (not currently using drugs illegally)
  • Autoimmune disorder, for example, lupus, fibromyalgia, rheumatoid arthritis, HIV/AIDS
  • Blind or low vision
  • Cancer (past or present)
  • Cardiovascular or heart disease
  • Celiac disease
  • Cerebral palsy
  • Deaf or serious difficulty hearing
  • Diabetes
  • Disfigurement, for example, disfigurement caused by burns, wounds, accidents, or congenital disorders
  • Epilepsy or other seizure disorder
  • Gastrointestinal disorders, for example, Crohn's Disease, irritable bowel syndrome
  • Intellectual or developmental disability
  • Mental health conditions, for example, depression, bipolar disorder, anxiety disorder, schizophrenia, PTSD
  • Missing limbs or partially missing limbs
  • Mobility impairment, benefiting from the use of a wheelchair, scooter, walker, leg brace(s) and/or other supports
  • Nervous system condition, for example, migraine headaches, Parkinson’s disease, multiple sclerosis (MS)
  • Neurodivergence, for example, attention-deficit/hyperactivity disorder (ADHD), autism spectrum disorder, dyslexia, dyspraxia, other learning disabilities
  • Partial or complete paralysis (any cause)
  • Pulmonary or respiratory conditions, for example, tuberculosis, asthma, emphysema
  • Short stature (dwarfism)
  • Traumatic brain injury
Please check one of the boxes below:

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.

You must enter your name and date
Human Check*