Software Engineer Level 4 with Security Clearance

Base-2 Solutions; Washington (District of Columbia); On-site; USD 120,000 - 170,000; Full time

Benefits offered by this job

Health insurance

Dental insurance

Vision insurance

Short-term disability

Long-term disability

Life insurance

401(k) matching

Flexible PTO

Floating holidays

Flexible work schedules

Job summary

Base-2 Solutions is seeking a Software Engineer Level 4 to develop, maintain, and enhance complex software systems focusing on backend development, data engineering, and API delivery. You will work on scalable Python/FastAPI backends, design and manage PostgreSQL databases, and support high-speed, mission-critical data integrations.

The role requires TS/SCI with CI Polygraph and hands-on experience building scalable, data-intensive systems.

Qualifications

• Active TS/SCI with CI Polygraph.
• Backend developer experience required.
• Data engineering and API development experience required.
• Experience building systems with Python and FastAPI.
• Experience designing and managing PostgreSQL databases with efficient SQL and indexing.
• Proficiency in Python.
• Proficiency in FastAPI.
• Proficiency in PostgreSQL.
• Proficiency in Elasticsearch.
• Experience building high-performance API connections for high-volume, mission-critical systems.

Responsibilities

• Develop, maintain, and enhance complex software systems including analytics and real-time components.
• Provide input to component design, including trade-offs and requirements analysis.
• Design, implement, and integrate software applications.
• Apply software engineering methods appropriate to the development and production environment.
• Ensure efficient delivery of software capabilities using standard processes.
• Mitigate risks, control costs, and manage large-scale software projects.

Skills

Backend development

Data engineering

API development

Python

FastAPI

PostgreSQL

Elasticsearch

Education

High School Diploma/GED with 13 years

Associates Degree with 11 years

Bachelors' Degree with 9 years

Masters' Degree with 7 years

PhD with 5 years

Tools

PostgreSQL (DB)

Elasticsearch

Job description

Job Description Position Summary Base-2 Solutions is seeking a Software Engineer Level 4 to develop, maintain, and enhance complex and diverse software systems supporting mission-focused environments. This role is centered on backend development, data engineering, and API development, with emphasis on building scalable systems using Python and FastAPI, designing and managing PostgreSQL databases, and supporting high-performance integrations across high-speed, high-volume, mission-critical, data-sensitive systems.

Essential Duties and Responsibilities

• Develop, maintain, and enhance complex and diverse software systems, including processing-intensive analytics, novel algorithm development, manipulation of extremely large data sets, real-time systems, and business management information systems, based upon documented requirements.
• Provide specific input to software component design, including hardware/software trade-offs, software reuse, use of COTS/GOTS in place of new development, and requirements analysis and synthesis from the system level to individual software components.
• Design, implement, and integrate software applications or perform software engineering tasks.
• Utilize software engineering and design methodologies appropriate to the development, integration, and production environment.
• Ensure efficient delivery of software engineering capabilities using industry standards and repeatable processes.
• Mitigate risks, control costs and schedule variance, and effectively manage large-scale, integrated software projects.

Required Qualifications

• Active TS/SCI with CI Polygraph.
• Demonstrated experience as a backend developer.
• Demonstrated experience in data engineering and API development.
• Experience building scalable systems with Python and FastAPI.
• Experience designing and managing PostgreSQL databases with efficient SQL and indexing strategies.
• Proficiency in Python.
• Proficiency in FastAPI.
• Proficiency in PostgreSQL.
• Proficiency in Elasticsearch.
• Experience building high-performance API connections between high-speed, high-volume, mission-critical, data-sensitive systems.

Preferred Qualifications

• Experience supporting processing-intensive analytics environments.
• Experience working with extremely large data sets.
• Experience supporting real-time systems.
• Experience contributing to software design decisions involving software reuse, COTS/GOTS, and system-to-component requirements analysis.

Required Education and Experience Equivalency

• High School Diploma/GED with 13 years of experience.
• Associates Degree with 11 years of experience.
• Bachelors' Degree with 9 years of experience.
• Masters' Degree with 7 years of experience.
• PhD with 5 years of experience.

Required Certifications

• None specified.

Required Security Clearance

• Active TS/SCI with CI Polygraph.

Pay & Benefit Highlights Compensation

• Competitive fixed salary or hourly pay (based on experience, skills, location, and internal equity).
• Employee referral bonuses up to $10,000 per hired referral.
• Additional bonus opportunities for exceptional performance and contributions to business development and company growth (role-dependent).
• 100% company-paid medical premiums for employees and eligible dependents.
• Choose from multiple plan options with CareFirst, Kaiser, and UnitedHealthcare, including PPO, POS, HMO, and HSA-compatible plans.
• 100% company-paid dental premiums for employees and eligible dependents.
• 100% company-paid vision premiums for employees and eligible dependents.
• 100% company-paid premiums for short-term disability.
• 100% company-paid premiums for long-term disability.
• 100% company-paid premiums for accidental death & dismemberment (AD&D).
• 100% company-paid premiums for life insurance up to $200,000.
• 401(k) with immediate vesting: 4% company match plus a 4% non-elective company contribution (8% total).
• 401(k) pre-tax and Roth options.
• Up to 20 days of flexible paid time off (PTO).
• 11 paid floating holidays.
• Flexible work schedules, including flex time and compressed work periods (contract and project-dependent).