Mid Level Developer Jobs in Washington, DC

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Junior Oracle Integration Cloud Developer

MNR Consulting Services

•

Remote

Contract

Title: Junior Oracle Integration Cloud Developer Location: Remote Duration: 6+ months Start Date: ASAP Project Overview: Join a long-standing federal financial modernization program within a large civilian agency managing the largest financial system in the federal government. The team is migrating existing SOA integrations into Oracle Integration Cloud (OIC) for a federal E-Business Suite (EBS) environment supporting financial and grant management processes. Description: Assist in re-platform
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Posted 4 days ago

Software Developer 3 (SWD3)

Realm One

•

Annapolis, Maryland, USA

Full-time

RealmOne is the GOAT - where your career can reach the greatest heights! RealmOne was built on the principle that people matter first and foremost. We believe in providing a strong work/life balance by investing in our employees and encouraging professional and personal growth. We do this by offering exceptional benefits, flexible schedules, and the tools necessary to achieve success through paid training, mentoring, and the opportunity to work alongside top-notch security professionals. Join u
Posted 28 days ago | Updated 4 hours ago

Lead Software Engineer - Remote

UnitedHealth Group

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Remote or San Diego, California, USA

Full-time

Optum is a global organization that delivers care, aided by technology to help millions of people live healthier lives. The work you do with our team will directly improve health outcomes by connecting people with the care, pharmacy benefits, data and resources they need to feel their best. Here, you will find a culture guided by diversity and inclusion, talented peers, comprehensive benefits and career development opportunities. Come make an impact on the communities we serve as you help us adv
Posted 43 days ago | Updated 5 hours ago

Sr Software Engineer - Backend

McGraw Hill

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Remote

Full-time

Overview Build the Future At McGraw Hill, we are dedicated to delivering digital learning experiences that transform education for learners and educators. Our focus is on creating seamless, impactful products that truly benefit our users while supporting growth and collaboration across teams. We foster a culture that values innovation, teamwork, and a balance between career growth and personal well-being. How can you make an impact? We are a passionate, fast-growing team within McGraw Hill, a
Posted 43 days ago | Updated 5 hours ago

Network Engineer

Leidos

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Chantilly, Virginia, USA

Full-time

Leidos is looking for a Systems Engineer to be part of a team responsible for the design, migration, implementation, enhancement, optimization and maintenance of LAN/WAN/Video/Voice/desktop infrastructure. This position will work with engineers on various technical projects. This could include but not limited to systems consolidation and integration, architecture designs and updates, site renovations and relocations. Primary Responsibilities: Provide technical expertise and assist with systems
Posted 60+ days ago | Updated 4 hours ago

Technical Lead (Developer/Java Fullstack)

LevelUp Squared

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Ashburn, Virginia, USA

Full-time

We are looking for an experienced and hands-on Technical Lead with strong coding skills in Java, and exposure to Python. The ideal candidate will have a robust background in system design, and proficiency in AWS and Microservices. This role involves leading proof-of-concept (POC) initiatives, guiding agile development processes, acting as a tech lead, and addressing production issues. RESPONSIBILITIES: Spearhead the design and development of innovative and high-impact initiatives, ensuring align
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Posted 60+ days ago | Updated 10 days ago

Sr. React / D365 Software Developer

Apex Systems

•

Arlington, Virginia, USA

Full-time

Job#: 2079442 Job Description: (100% Remote) React / MS D365 Software Developer - $140,000 - $150,000 - Apex Systems has an Immediate Need for a (100% Remote) React / D365 Software Developer !! This will be an "est. 6-12 Month Contract to Possible Permanent Hire" opportunity, supporting one of our Largest DoD / Government Clients on the East Coast & Nationwide! Please See Below for all Position Details & How To Apply. HOW TO APPLY Email a Resume to: - Job Title: React / D365 Software Deve
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Posted 5 days ago | Updated 5 hours ago

Senior Avaya Engineer | Remote | Contract

Walker Healthforce

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Remote

Contract

Senior Software Engineer (AVAYA Integration & Automation, .NET, C#) | Government Clearance Required | 8+ years of Experience | Remote | Contract Walker Healthforce is seeking a Senior Software Engineer with 8+ years of experience to support a healthcare client. Candidates should have a strong background in development w/ direct knowledge of AVAYA automation and integration, .NET technologies, C#, and Microsoft SQL Server. This is a 4-month contract with potential for extensions. START DATE:ASAP
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Posted 43 days ago | Updated 17 days ago

Sr. Java Developer

Leidos

•

Reston, Virginia, USA

Full-time

Leidos has a new and exciting opportunity for a Sr. Java Developer in our National Security Sector's (NSS) Cyber & Analytics Business Area (CABA). Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. At Leidos, we offer competitive benefits, including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Fl
Posted 60+ days ago | Updated 4 hours ago

Senior Java/J2EE Developer

Pyramid Consulting, Inc.

•

McLean, Virginia, USA

Contract

Immediate need for a talented Senior Java/J2EE Developer. This is a 06+ Months Contract opportunity with long-term potential and is located in McLean, VA (Onsite). Please review the job description below and contact me ASAP if you are interested. Job ID:25-77663 Pay Range: $60 - $65/hour. Employee benefits include, but are not limited to, health insurance (medical, dental, vision), 401(k) plan, and paid sick leave (depending on work location). Key Responsibilities: Engage business users to d
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Posted 9 days ago

Java Developer Senior

SAIC

•

Ashburn, Virginia, USA

Full-time

Job ID: 2507050 Location: ASHBURN, VA, US Date Posted: 2025-07-18 Category: Software Subcategory: SW Engineer Schedule: Full-time Shift: Day Job Travel: Yes, 10 % of the Time Minimum Clearance Required: None Clearance Level Must Be Able to Obtain: Public Trust Potential for Remote Work: Yes Description Position Summary We are currently seeking a motivated, career and customer-oriented Full Stack Java/JEE Developer (Journeyman) to join our team to begin an exciting and challenging care
Posted 1 day ago | Updated 2 hours ago

ADF Lead Engineer

Webilent Technology, Inc.

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Washington, USA

Contract, Third Party

Webilent is a leading business technology solutions company. We specialize is providing turn-key project execution as well as employee augmentation services. We strive to be the IT partner of choice for every client we serve. We value the role every individual plays in helping our clients meet their end-goal objectives while maintaining the highest level of commitment to our core values: integrity, expertise and service excellence. We give clients the freedom to reach their goals through a varie
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Posted 47 days ago | Updated 4 hours ago

Full Stack Sr. Software Engineer/Modernization

Robert Half

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Remote or West Des Moines, Iowa, USA

Contract

Description We are looking for a Full Stack Senior Software Modernization Engineer to join our team on a long-term contract basis in West Des Moines, Iowa. In this role, you will play a vital part in modernizing systems and driving the development of innovative solutions that integrate cutting-edge technologies like Optical Character Recognition and microservices architecture. This position is ideal for a skilled individual eager to contribute to impactful projects within the life insurance indu
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Posted 2 days ago | Updated 1 hour ago

Senior .Net Developer With React

Tekfortune Inc.

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Remote

Contract

Full stack .Net/React Remote Contract through end of year; high likelihood of extension Looking for Only W2 no C2C Project: Senior Developers: 50/50 Full Stack DevelopersFrontend - ReactJSTypical webformWeb APIsBackend - .Net Core, C#REST APIsAPI architecture - Web API to support the UI; REST on BEDB: use various - SQL Server, mySQL, SnowflakeServices are posted on AWSAll containerized with KubernetesDevs will handle all testing themselvesUnit TestingAutomated testing using Selenium for C#Story
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Posted 38 days ago | Updated 1 day ago

Senior Engineer Frontend Developer

Miracle Software Systems, Inc.

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Remote

Contract

Miracle Software System is seeking a highly skilled and experienced Front End Developer to join our team and take ownership of delivering exceptional e-commerce web applications. You ll work closely with cross-functional teams to develop robust, maintainable, and scalable front-end solutions using modern frameworks and libraries like React, while maintaining and refactoring legacy jQuery code where necessary. Position: Front End Developer Location: MI Responsibilities Develop and maintain web ap
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Posted 2 days ago

Data Scientist

Newt Global

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Remote

Contract

Product & Functional Skills Looking for Sr. Data Scientist with deep expertise in machine learning, AI and a track record of developing production ML/AI solutions that are business impactful. As part of our team, you will be working side-by-side with high-impact engineers and strategic customers to solve complex problems. You will communicate trends and innovative solutions to stakeholders. You will work cross-functionally with several teams including engineering crews, product teams, and progr
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Posted 2 days ago

100% Remote -- Data Scientist (Gen AI)

Newt Global

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Remote

Contract

Product & Functional Skills Looking for Sr. Data Scientist with deep expertise in machine learning, AI and a track record of developing production ML/AI solutions that are business impactful. As part of our team, you will be working side-by-side with high-impact engineers and strategic customers to solve complex problems. You will communicate trends and innovative solutions to stakeholders. You will work cross-functionally with several teams including engineering crews, product teams, and progr
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Posted 2 days ago | Updated 2 days ago

Senior Software Engineer - Data Platform

eBay Inc.

•

Remote or Portland, Oregon, USA

Full-time

At eBay, we're more than a global ecommerce leader - we're changing the way the world shops and sells. Our platform empowers millions of buyers and sellers in more than 190 markets around the world. We're committed to pushing boundaries and leaving our mark as we reinvent the future of ecommerce for enthusiasts. Our customers are our compass, authenticity thrives, bold ideas are welcome, and everyone can bring their unique selves to work - every day. We're in this together, sustaining the futur
Posted 2 days ago | Updated 4 hours ago

Neutronics Engineer

VISION INFOTECH INC.

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US

Third Party, Contract

Hi, Hope you are doing well. My name is Rohen and I represent Vision InfoTech. I came across this role that you might be interested in. Let me know if you're interested in the below position. Role: Neutronics Engineer Location: Remote Job Type: Contract Candidate has the specific nuclear experience required, please feel free to share your profile for review. About the job Experienced Neutronics Engineer Core Reload Analysis Currently in need of an Experienced Neutronics Engineer to suppor
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Posted 3 days ago | Updated 1 day ago

Sr., Java Developer

OpTech

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Remote

Contract

OpTech is seeking for strong Java Developer role for one of their Direct Clients. 100% Remote role. Contract Duration - 5 months. Only W2/No C2C Required Skills: Strong backend Java developer with JDBC/SPRING/SPRINGBOOT/SPRINGBATCH JAVA/J2EE Why work at OpTech? OpTech is a woman-owned company that values your ideas, encourages your growth, and always has your back. When you work at OpTech, not only do you get health and dental benefits on the first day of employment, but you also have training o
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Posted 60+ days ago | Updated 23 days ago