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Backend developer Jobs in Washington, DC

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Backend developer • washington dc

Last updated: 5 hours ago

Senior Software Developer (Python – Backend)

DRC SystemsMcLean, VA, United States
Full-time
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Title: Senior Software Developer (Python Backend) Location: McLean, VA (5 days - Onsite) Must Have Qualifications: 5+ Backend Development with Python engineering- large data libraries, ...Show more

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Developer

SiloSmashersArlington, VA, USA
Full-time
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DHS suitability clearance, as required by federal contract.The Developer will support DHS CISA by designing, building, and maintaining secure applications that enable mission-critical operations an...Show more

HRIS Developer

Greenberg-Larraby, Inc. (GLI)Washington, DC, US
Full-time
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The HRIS Developer will play a vital role in developing, maintaining, and enhancing the Human Resources Information System (HRIS) to ensure it meets the organization’s needs.This role involves work...Show more

Application Developer

TradeJobsWorkForce22202 Arlington, VA, US
Full-time

Analyze the ideas, business models, and user requirements to formulate a design strategy to carry out.Act as a tenant to draw out a workable application design and coding parameters with the essent...Show more

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Workday Developer

ICONMAMcLean, VA
Full-time

Our Client, a Real Estate and Financial Services company, is looking for a Workday Developer for their McLean, VA location.The Enterprise Business Technology office supports the Freddie Mac enterpr...Show more

Cloud Developer

J5 ConsultingMcLean, VA, US
Full-time
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J5 Consulting is a Maryland based company established in 2006 to provide computing and consulting services for government and commercial entities.Our services improve Information System networking ...Show more

Senior.NET Developer

Evolver FederalWashington, DC, USA
Full-time
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Evolver is a cybersecurity and digital transformation company supporting national defense, federal civilian agencies, and Fortune 500 organizations.We help customers secure critical systems, modern...Show more

iOS Developer

Hudson ManpowerWashington, DC, US
Full-time

Seeking a motivated iOS Developer to design, develop, and maintain high-quality mobile applications for Apple devices.Must collaborate with cross-functional teams and follow best coding practices.D...Show more

Backend Java Developer

SynergisticITDowntown, DC, US
Full-time

Launch Your Tech Career with Confidence — SynergisticIT Is Your Next Best Move.Are you eager to start a thriving career in tech but unsure how to bridge the gap between learning and getting hired? ...Show more

Javascript Developer

Akaasa TechnologiesMcLean, VA, United States
Full-time
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ONLY PRIOR CAPITAL ONE CONTRCATOR Javascript Developer Mandatory experience with React, Redux, NodeJS, AWS Lambda, AWS ECS, PostgresSQL, Mocha, Jest, Playwright, Vitest Job Location McLean VA(1 st ...Show more

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ServiceNow Developer

Cohere Technology Group LLCMcLean, VA, US
Full-time
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Cohere is seeking ServiceNow Developer.This candidate will support our client with design, creation, deployment, and maintenance of multiple ServiceNow applications supporting the Intelligence Comm...Show more

Java Backend Developer - Contingent

AretumMcLean, VA, US
Remote
Full-time
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Public Trust Eligibility Required.This is a contingent position, meaning employment is dependent upon the successful award of the associated contract to Aretum and completion of any required backgr...Show more

Software Developer

00100 LEIDOS, INC.Bethesda, MD
Full-time +1

Ready to break away from the ordinary and dive into an extraordinary career? At Leidos' High Fidelity Simulation Business Area, we’re not just building systems—we’re revolutionizing the future of n...Show more

Backend Python Developer

Genesis10McLean, VA, US
Permanent

Genesis10 is currently seeking a Backend Python Developer for an on-site position with a Major Financial Institution located in McLean, VA.This is a contract opportunity through December 2026.This ...Show more

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RPA Developer

ProSidian Consulting, LLCAlexandria, Virginia, United States
Full-time

ProSidian Seeks a RPA Developer | Human Capital Technology Support - Intelligent Automation (AI & RPA) [NSF0056056] for Program Support on a Exempt W2: No Overtime Pay Basis located in the Mid Atla...Show more

Mobile Developer

Aquinas ConsultingBethesda, Maryland, USA
Full-time

Aquinas Consulting is currently looking to fill a hybrid Senior Mobile Software Engineer job in Bethesda, MD for our direct client in the hospitality industry.In this job, you will design, develop,...Show more

Python Developer

Tactibit Technologies LLCSuitland, Maryland, United States
Permanent

Tactibit Technologies provides innovative information technology, cybersecurity, and cloud support services to the Federal Government.We support some of the nation's most critical and demanding pro...Show more

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Senior Software Developer (Python – Backend)

Senior Software Developer (Python – Backend)

DRC SystemsMcLean, VA, United States
5 hours ago
Job type
  • Full-time
  • Quick Apply
Job description
Title: Senior Software Developer (Python Backend)
Location: McLean, VA (5 days - Onsite)
Must Have Qualifications: 5+ Backend Development with Python engineering- large data libraries, working with databases, and working with large currency.
Position Overview
client's Investments & Capital Markets division is seeking a Senior Software Developer (Python Backend) to support the development and enhancement of mission-critical applications built on modern software development frameworks.
The ideal candidate will contribute across the full software development lifecycle, including new feature development, code refactoring, defect resolution, technical debt reduction, performance improvements, and migration initiatives. This role supports both customer-facing and internal applications/services and requires strong expertise in backend Python engineering and large-scale data processing.
Key Responsibilities
  • Design, develop, and maintain backend services and applications using Python
  • Work with large datasets, currency-related data, and high-volume transactional systems
  • Implement and optimize database interactions and data processing workflows
  • Participate in code refactoring, defect fixes, and technical debt remediation
  • Support application migrations and modernization efforts
  • Collaborate with cross-functional teams across development, testing, and operations
  • Contribute to testing, verification, deployment, monitoring, and maintenance of applications
  • Ensure solutions align with scalability, performance, and reliability standards
Must-Have Qualifications
  • 5+ years of backend development experience using Python
  • Strong experience working with large data libraries and frameworks
  • Hands-on experience with databases (relational and/or NoSQL)
  • Experience handling large currency or financial datasets
  • Solid understanding of software development lifecycle (SDLC)
  • Ability to work in a fast-paced, enterprise-scale environment
Nice-to-Have Skills
  • Experience in financial services or capital markets
  • Familiarity with modern software development frameworks
  • Exposure to cloud-based architectures and services
  • Strong debugging, performance tuning, and optimization skills