Top 1186 Sr Developer Jobs in Largo, MD

Senior Full Stack Developer (React + Python)
Covalent Solutions, LLC —Bethesda, MD
- $145,000 - $160,000 a year
- Full-time
- Background check
- Azure
- Computer Science
- Paid jury duty
- AD&D insurance
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Senior UI/UX Engineer
LendingPad Corp —McLean, VA
- $100,000 - $140,000 a year
- Full-time
- Background check
- Computer science
- 7 years
- Health savings account
- Health insurance
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AP108 HEASARC Senior Scientific Software Developer
ADNET Systems, Inc. —Greenbelt, MD
- Computer Science
- Bachelor of Science
- Bachelor's degree
- Paid holidays
- Disability insurance
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Sr Automation Test Engineer
One Call Concepts, Inc. —Hanover, MD
- $85,000 - $95,000 a year
- Full-time
- Hybrid work
- Background check
- Computer science
- Computer Science
- Paid holidays
- Health insurance
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Senior ALC Developer
The C.A.S.E. Engineering Group —New Carrollton, MD
- $120,000 - $135,000 a year
- Weekends as needed
- Hybrid work
- Computer science
- Computer Science
- Research
- Health insurance
- Dental insurance
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1d
Senior Application Developer
Govcio LLC —Fairfax, VA
- $135,000 - $175,000 a year
- Full-time
- Hybrid work
- Azure
- Computer Science
- System design
9d
Senior .NET Developer
IvoryCloud —Rockville, MD
- $120,000 - $145,000 a year
- Full-time
- Computer Science
- System design
- Office
- Paid training
- Disability insurance
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1d
Sr. Software Engineer TS/SCI Polygraph
Leidos —Alexandria, VA
- $131,300 - $237,350 a year
- Full-time
- Bachelor of Science
- Writing skills
- Windows
Senior Application Engineer - Oracle ERP-PVM & Ivalua VenDoor
Navy Federal Credit Union —Vienna, VA
- $130,500 - $179,500 a year
- Online Application
- 7 years
- Computer Science
- Office
Senior Software Engineer (SAS)
General Dynamics Information Technology —Springfield, VA
- $125,800 - $170,200 a year
- Azure
- 5 years
- Bachelor's degree
- Paid time off
- 401(k) matching
13d
Senior DevOps Engineer
Leidos —Maryland
- $107,900 - $195,050 a year
- Full-time
- Hybrid work
- 6 years
- Computer Science
- Bachelor of Science
8d
Senior Python Developer
Leidos —Columbia, MD
- $131,300 - $237,350 a year
- Full-time
- Azure
- Computer Science
- Bachelor of Science
TS/SCI Cleared Software Developer - Senior
Amentum —Fort George G Meade, MD
- $145,000 - $153,000 a year
- Full-time
- Software troubleshooting
- Office
- Master's degree
- Health savings account
- Relocation assistance
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Senior Software Engineer
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $105,000 - $290,000 a year
- Full-time
- Computer science
- Computer Science
- 5 years
- Disability insurance
- Health insurance
Senior Software Engineer/AI Practitioner
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $105,000 - $290,000 a year
- Full-time
- Computer science
- Computer Science
- Bachelor of Science
- Disability insurance
- Health insurance
Senior Embedded Systems & Hardware-in-the-Loop Engineer
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $105,000 - $290,000 a year
- Full-time
- Computer science
- Computer Science
- Bachelor of Science
- Disability insurance
- Health insurance
Sr. Software Engineer TS/SCI Polygraph
Leidos —Annapolis Junction, MD
- $131,300 - $237,350 a year
- Full-time
- Bachelor of Science
- Writing skills
- Windows
Senior DevSecOps Engineer / SME
Bravent LLC —Arlington, VA
- $80 - $100 an hour
- Contract
- Computer science
- Azure
- Computer Science
- Opportunities for advancement
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10h
Senior Software Engineer
Amentum —Springfield, VA
- $190,000 - $210,000 a year
- Full-time
- Master's degree
- Product management
- Mentoring
- Health savings account
- Paid holidays
Quick Apply
Senior Java Developer (Active TS/SCI with Poly Required - (SIGN-ON BONUS UP TO $30,000)
General Dynamics Information Technology —Annapolis Junction, MD
- $164,382 - $207,000 a year
- AWS
- Bachelor's degree
- Mentoring
- Paid holidays
- Paid time off

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Senior Full Stack Developer (React + Python)

Covalent Solutions, LLC
Bethesda, MD

Quick Apply

Job Details

Full-time
$145,000 - $160,000 a year

Benefits

Paid jury duty
AD&D insurance
Paid holidays
Disability insurance
Health insurance
Dental insurance
401(k)
Paid time off
Vision insurance
Bereavement leave
Life insurance

Qualifications

Containerization systems
Secure web application development
Software engineering
Authorization controls implementation
Computer Science
Continuous Delivery (CD) implementation
Engineering development testing
Application Architecture Design (Architecture design skill)
Front-end state management
Git
English
Public Cloud
Scalable systems
Master's degree
SQL
Technical solutions implementation
AWS
Docker
Professional development support
Bachelor's degree
Technology advisory
REST
Mentoring
Software development
Developing automated testing protocols
Scalability
Developing and maintaining backend systems
Agile software development
Front-end component implementation
Access control management

Full Job Description

Senior Full-Stack Developer (React + Python)

JOB SUMMARY

Covalent Solutions (Covalent) is seeking a mission driven, highly motivated and collaborative Senior Full-Stack Developer (React + Python) with expertise in React and Python to build modern, scalable web applications. The ideal candidate will have strong front-end skills in React combined with hands-on experience developing back-end APIs, managing databases, and deploying applications in the cloud. This role requires versatility across the full stack, with the ability to design, develop, and optimize both client-facing and server-side solutions. There will be a strong focus on application design and technology decision-making.

This opportunity is full-time with Covalent and is on-site in Bethesda, Maryland.

DUTIES AND RESPONSIBILITIES include, but are not limited to:

Develop responsive, user-friendly front-end applications using React and modern UI frameworks.
Build and maintain RESTful APIs and backend services using Python (Django, Flask, or FastAPI).
Design and optimize relational (PostgreSQL, MySQL) and NoSQL (MongoDB, Cosmos DB, etc.) databases.
Integrate React front ends with Python APIs and databases to deliver seamless applications.
Implement secure, scalable, and high-performing application architectures.
Collaborate with DevOps on CI/CD pipelines, containerization (Docker, Kubernetes), and cloud hosting (Azure, AWS, or GCP).
Conduct code reviews, write automated tests, and troubleshoot across the stack.
Partner with UX/UI designers, QA, and product owners in Agile/Scrum teams.
This position requires not just expertise in React and Python, but also the ability to critically evaluate and decide on the most effective software products, frameworks, and architectural patterns for long-term project success and scalability.

QUALIFICATIONS

Education

Bachelor’s or Master’s in Information Technology, Computer Science, Computer Engineering or Electrical Engineering

Work Experience

8+ years professional software development experience.
6+ years building applications with React (state management with Redux or Context API).
Strong experience with Python frameworks (Django, Flask, or FastAPI).
Proven ability to design, build, and consume RESTful APIs (GraphQL a plus).
Solid database experience with both SQL and NoSQL systems.
Experience deploying applications on cloud platforms (Azure, AWS, or GCP).
Familiarity with containerization (Docker, Kubernetes).
Exposure to CI/CD pipelines and DevOps practices.
Understanding of security best practices (OAuth, JWT, role-based access control).
Prior experience working in Agile/Scrum environments.
Proficiency with HTML5, CSS3, and modern styling frameworks (Tailwind, Material-UI, etc.).
Experience with unit/integration testing frameworks (Jest, PyTest, etc.).
Have led the design and implementation of application architecture from the ground up, ensuring solutions are scalable, resilient, and align with business objectives.
Contributed to and influenced architectural strategy and modernization roadmaps across technology and business leadership.
Evaluated and selected the most effective tools, frameworks, and services for new projects, justifying technical decisions and performing design reviews for clarity and technical merit.
Served as a technical mentor and guide for mid-level and junior developers, providing hands-on coding support and reference code.

COMPETENCIES

Professionalism:

Strong problem-solving and analytical abilities.
Sharp eye for detail.
Proven ability to manage multiple tasks concurrently and in different phases of work at the same time. Flexibility and adaptability to perform in a fast paced and dynamic environment. Context-switching does not bother you.
Effectively collaborates and influences people at all levels in the organization through strong interpersonal and communication skills.
Highly organized with strong time-management skills.
Ability to manage conflict and drive resolution.
Focused on results, proactive, service oriented
Can focus on both high level and detail level, knowing which is appropriate for the situation.
Ability to self-direct and manage ambiguity.
Ability to take in a lot of disparate information and find common themes, recommend clear paths forward and iterate.
Motivated by professional rather than personal concerns.
Show persistence when faced with difficult problems or challenges.
Naturally curious about things you don't understand and actively look for opportunities to grow and learn from those around you.

Communication:

Excellent collaboration and communication skills.
Actively participate in meetings and be willing to advocate for what you believe in. Provide thoughtful, constructive review of others’ work, knowing that everyone is working towards the same objective.
Superior written and verbal communication skills. You can always articulate the "why" behind your solutions.
Listen to others, correctly interpret messages from others and respond appropriately.
Ask questions to clarify, and exhibit interest in having two-way communication.
Tailor language, tone, style and format to match the audience.
Demonstrate openness in sharing information and keeping people informed.
Speak intelligently about a wide variety of topics but know when to say, "I don't know."

Teamwork:

Self-starter who thrives in fast-paced, team-oriented environments.
Work collaboratively with colleagues to achieve organizational goals.
Place team agenda before personal agenda.
Support and act in accordance with the final group decision, even when such decisions may not entirely reflect your own position.
Share credit for team accomplishments and accept joint responsibility for team shortcomings.

Accountability:

Take ownership of all responsibilities and honor commitments.
Deliver outputs for which you have responsibility within prescribed time, cost and quality standards.
Operate in compliance with organizational regulations and rules.
Take personal responsibility for your own shortcomings, where applicable.

Pay: $145,000.00 - $160,000.00 per year

Benefits:

401(k)
AD&D insurance
Bereavement leave
Dental insurance
Disability insurance
Health insurance
Life insurance
Paid holidays
Paid jury duty
Paid time off
Vision insurance

Application Question(s):

Do you currently need or will require H1-B sponsorship in near future?
Do you have 6+ years of building applicationwith React and Python?
Have you led the design and implementation of application architecture from the ground up, ensuring solutions are scalable, resilient, and align with business objectives?
Have you contributed to and influenced architectural strategy and modernization roadmaps across technology and business leadership?
Have you evaluated and selected the most effective tools, frameworks, and services for new projects, justifying technical decisions and performing design reviews for clarity and technical merit?
Have you served as a technical mentor and guide for mid-level and junior developers, providing hands-on coding support and reference code.?
Do you have 6+ years of professional development using Python?
Do you have 6+ years of professional development using React?

Education:

Bachelor's (Required)

Experience:

Software development: 8 years (Required)

Language:

English (Required)

Ability to Commute:

Bethesda, MD 20892 (Required)

Work Location: In person

Quick Apply

Refine Your Search

Sr Developer jobs in Largo, MD

Senior Full Stack Developer (React + Python)

Senior UI/UX Engineer

AP108 HEASARC Senior Scientific Software Developer

Sr Automation Test Engineer

Senior ALC Developer

Senior Application Developer

Senior .NET Developer

Sr. Software Engineer TS/SCI Polygraph

Senior Application Engineer - Oracle ERP-PVM & Ivalua VenDoor

Senior Software Engineer (SAS)

Senior DevOps Engineer

Senior Python Developer

TS/SCI Cleared Software Developer - Senior

Senior Software Engineer

Senior Software Engineer/AI Practitioner

Senior Embedded Systems & Hardware-in-the-Loop Engineer

Sr. Software Engineer TS/SCI Polygraph

Senior DevSecOps Engineer / SME

Senior Software Engineer

Senior Java Developer (Active TS/SCI with Poly Required - (SIGN-ON BONUS UP TO $30,000)

I want to receive the latest job alert for Sr Developer in Largo, MD

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