Mid-Level Backend Software Engineer
System One
Job Description
Job Description
Job Title: Mid-Level Backend Software Engineer-TS/SCI Location: Gaithersburg, MD Type: Contract To Hire Compensation: Work Model: Onsite Hours: 40.0 Security Clearance: Top Secret/SCI
Overview Active TS/SCI Security Clearance required with the ability to successfully pass a Polygraph
Responsibilities
- Design, develop, test, and maintain backend application components using Java or Python
- Develop and maintain RESTful services to support application functionality and system integrations
- Apply object-oriented design principles to build scalable and maintainable systems
- Write and modify SQL queries to support application functionality and data retrieval
- Collaborate with internal and external teams to understand data sources, formats, and access methods, and support integration into backend systems
- Develop and troubleshoot applications within Linux-based environments
- Implement backend logic for data transformation, processing, and system workflows
- Identify, debug, and resolve application-level defects and performance issues
- Follow coding standards, participate in code reviews, and support documentation efforts
- Bachelor’s degree in Computer Science, Software Engineering, or a related field with 4–8 years of experience; or a Master’s degree with 2–6 years of experience
- US Citizenship
- Active TS/SCI with the ability to successfully pass a Polygraph
- Professional experience developing object-oriented applications in Java or Python
- Hands-on experience building and maintaining RESTful APIs
- Basic to moderate experience with SQL capability, including writing queries and working with relational databases
- Working knowledge of Linux-based environments
- Ability to work independently on defined tasks within established technical frameworks and deliver reliable results
System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.
System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.
#M1 #LI-VR1 Ref: #856-Baltimore-S1
$110k - $130k
Mid-Level Backend Software Engineer Location: Gaithersburg, MD Required Clearance: Active TS/SCI with the Ability to Successfully Complete a Polygraph Employment Type: Full-Time Regular Shift: Day Travel: No Relocation Assistance: Yes Company Overview We are Ennoble First...SuggestedFull timeRelocation packageShift work$87k - $157.45k
Mid-Level Backend Software Engineer Gaithersburg, MD Active TS clearance (SCI eligibility) and eligibility to obtain a CI poly required At Bcore, our strength comes from how we deliver impact to the mission. Whether it's architecting critical IT solutions, producing actionable...Suggested$110k - $130k
Mid-Level UI/UX Developer Location: Gaithersburg, MD Required Clearance... ...supporting modern software solutions across the customer... ...This role bridges design and engineering, focusing on creating seamless... ...Developer will work closely with backend engineers, product owners,...SuggestedFull timeRelocation packageShift work$87.1k - $157.45k
...ve been building your skills in backend development, object‑oriented programming, and mission‑driven engineering, and you’re ready for work that... ...mission with visibility at senior levels, you’ll thrive here.We’re hiring a Backend Software Engineer to support a high‑...SuggestedFull time- Software Guidance & Assistance, Inc., (SGA), is searching for a Mid-Level Developer for a CONTRACT assignment with one of our premier... ...Design and develop scalable backend services that power intelligent... ...of a collaborative software engineering effort. This role...SuggestedContract work
$65 - $67 per hour
...Position Title: Mid-Level Full Stack Developer Location: Bethesda, MD - 5 Days onsite... ...analytics platform Develop and support backend services and APIs powering portfolio modeling... ...financial concepts into scalable software solutions Maintain high-quality, well...Contract workTemporary workLocal areaRelocationMonday to Friday- ...Software Guidance & Assistance, Inc., (SGA), is searching for a Mid-Level Software Engineer for a CONTRACT assignment with one of our premier Regulatory clients in Rockville, MD or Tysons, VA. The Mid-Level Software Engineer develops software products and...Contract workWork experience placement
$90k - $100k
...Mid-level Software Engineer Job Locations US-MD-Germantown ID 2026-4740 Category Information Technology Type Full Time Overview Edgewater Federal Solutions is currently seeking a Mid-Level Software Engineer to provide...Full timeContract workRemote workFlexible hours- Software Guidance & Assistance, Inc., (SGA), is searching for a Mid Level Software Engineer for a CONTRACT assignment with one of our premier Regulatory clients in the DMV area. Role Overview: ~ Architects and builds full-stack web applications and the tooling...Contract work
$87.1k - $157.45k
Are you ready to build software that makes a real-world impact? Leidos is seeking a talented Mid-Level Full Stack Software Engineer to join the Chinook Program supporting an Intelligence... ...user interfaces to building scalable backend services and integrating secure, cloud...Full timeContract work- Eliassen Group is seeking a Mid-Level Application Release Support Engineer (Temp to Perm) to perform server installation, configuration, and troubleshooting... ...Python or Perl. Responsibilities include maintaining software applications and overseeing project components to...Permanent employmentTemporary work
- Mid-Level Application Release Support Engineer (Temp to Perm) The main function of a Systems Engineer is to perform a wide variety of installation, configuration... ...and upgrading of servers and related hardware and software in a LAN, WAN and stand‑alone environment, providing...Permanent employmentTemporary work
- ...Overview Black Canyon Consulting (BCC)is searching for a Mid-Level Software Developer with C++ and Javascript to support National Center for Biotechnology Information (NCBI) . This opportunity is full time and onsite at the NCBI in Bethesda, MD. The NCBI Taxonomy...Full timeWork experience placement
- ...and business stakeholders, translate high-level requirements into detailed designs, and... ...’s Degree in Computer Science, Computer Engineering, Information Technology, or related... ...environment. ABOUT US Precise Software Solutions, Inc. is a mission-focused technology...Temporary workLocal areaRemote workFlexible hours
- DRB Homes in Rockville, MD seeks an entry-level software developer to design, build, and maintain applications across web, API, Windows services, and SQL Server databases from its Corporate Division. You will work with Blazor, C#, JavaScript, HTML/CSS, and .NET APIs, and...Full time
- Prescient Edge is seeking a Mid. Systems Engineer to support a federal government client. The role... ...involves overseeing the creation of hybrid software, web and hardware products from specs... ...'s degree in Engineering, and SECRET level clearance. #J-18808-Ljbffr Prescient...
$87.1k - $157.45k
...Intelligence Sector combines technology-enabled services and mission software capabilities in the areas of cyber, logistics, security... ...National Solutions Business Area, is currently seeking a Mid-Level DevSecOps Engineer on the Maru Program. The successful candidate will play a...Full timeContract workShift work$87.1k - $157.45k
Job Description:Are you passionate about delivering high-quality software that directly supports our nation’s security? Leidos is seeking an experienced Mid-Level Test Engineer to join the Chinook Program supporting an Intelligence Community customer. This is an opportunity...Full timeContract work- Software Guidance & Assistance, Inc. (SGA) is seeking a Mid/Senior Full Stack Developer for a CONTRACT assignment with a Regulatory client in the DMV area. The role emphasizes enterprise-grade financial technology, robust code quality, and reliable systems. You will design...Contract work
- Software Guidance & Assistance, Inc., (SGA), is searching for a Mid/Senior Full Stack Developer for a CONTRACT assignment with one... ...building enterprise-level solutions within iterative development... ...Agile frameworks Software Engineering Best Practices : Proficiency...Contract work
- Black Canyon Consulting is seeking a Junior/Mid Full Stack Software Engineer to join their remote-first team. This role emphasizes the development of backend services in Python and integration with various data sources. Candidates should have experience with React or Next...Remote job
- Software Guidance & Assistance, Inc., (SGA), is searching for Back End Engineers for contract assignments with one of our premier Regulatory clients. Must work hybrid in... ...interview 10/6 (non-negotiable) Hiring 5 mid-level and 5 senior-level Develop software...Contract workWork experience placementLocal area
$95k - $154k
...now.Currently, we are looking for entry-level software programmers, Java Full stack developers... .../Java developers, Data analysts/Data Engineers/Data Scientists, Machine Learning engineers... ...to get a Job? | SynergisticIT Backend vs. Full Stack Development: Job Prospects...Full timeH1b- ...Jacobs/BlackLynx seeks a qualified and highly motivated Linux software engineer to work in the Rockville, MD office, and to begin immediately. Position Responsibilities: · Collaborate with a team of engineers to design, implement, and test high performance computing...Work at officeImmediate start
- ...Consulting (BCC) is actively looking for a mid-level Full Stack Developer (C++) to... ...join NCBI’s team of web developers and software engineers to build robust, flexible web applications... ...Familiarity with search engines and backends (Lucene, Solr) Semantic markup and...Full timeWork experience placementWork at officeRemote workFlexible hours
$72.7k - $149.2k
Job Title: C++ Mid-Level SW DeveloperJob Category: Information TechnologyTime Type: Full timeMinimum... ..., experienced mid level C++ full software cycle developer to support NSWC... ...opportunity to work with other developers and engineers in an effort to support the ongoing projects...Contract workWork experience placementRemote workFlexible hours- Software Guidance & Assistance, Inc., (SGA), is searching for a Full Stack Engineer for a CONTRACT assignment with one of our premier Regulatory clients in Rockville... ..., production-grade software Backend Development Expert-level Java development with spring and...Contract work
- Software Guidance & Assistance, Inc., (SGA), is searching for a Full Stack Developer... ...standards, and mentors fellow engineers. Continuously improves... ...practices. Required Skills : Backend Development Expert-level Java development, with strong Spring...Contract work
$107.27k - $125k
...document portions of the overall solution. Ensure client’s software development process is followed on the project based on industry... ...provided is a good faith estimate representative of all experience levels. Salary at LCG is determined by various factors, including but...Work experience placementRemote work- ...Black Canyon Consulting (BCC) is actively looking for a mid-level Full Stack Developer (C++) to support our work for the National... ...usa.gov. You will join NCBI's team of web developers and software engineers to build robust, flexible web applications, APIs, and services...Full timeWork at officeRemote workFlexible hours
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Mid-Level Backend Software Engineer. Be the first to apply!
- software technology Gaithersburg, MD
- remote software sales Gaithersburg, MD
- embedded software Gaithersburg, MD
- software intern Gaithersburg, MD
- software support Gaithersburg, MD
- ultimate software Gaithersburg, MD
- entry level software sales Gaithersburg, MD
- software Gaithersburg, MD
- internship software Gaithersburg, MD
- id software Gaithersburg, MD



