Software Engineer Level 4

Base-2 Solutions; Washington (District of Columbia); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Health insurance

Dental insurance

Vision insurance

Disability insurance

Life insurance

401(k) with match

PTO & holidays

Job summary

Base-2 Solutions is seeking a Software Engineer Level 4 to develop, maintain, and enhance complex software systems in mission-critical environments. This role focuses on backend development, data engineering, and API work, leveraging Python, FastAPI, and PostgreSQL to build scalable, high-performance solutions.

The position requires an active TS/SCI with CI Polygraph, is on-site in Washington, DC, and follows a First shift schedule.

Qualifications

• Active TS/SCI with CI Polygraph.
• Backend development and data engineering experience required.
• Experience building scalable systems with Python and FastAPI.

Responsibilities

• Develop, maintain, and enhance complex software systems including analytics and real-time components.
• Design, implement, and integrate software applications and APIs.
• Create efficient data models and manage PostgreSQL databases with indexing.
• Collaborate with cross-functional teams to ensure secure, scalable solutions.
• Review and test software components for design adherence and performance.

Skills

Backend development

Python

FastAPI

PostgreSQL

SQL indexing

Elasticsearch

API development

Data engineering

Education

High School Diploma/GED with 13 years of experience

Associates Degree with 11 years of experience

Bachelor's Degree with 9 years of experience

Masters' Degree with 7 years of experience

PhD with 5 years of experience

Tools

N/A

Job description

• Required Security Clearance: Top Secret/SCI with CI Polygraph
• Location: Washington, DC
• Work Type: On-Site
• Shift: First

• Standard Title: Software Engineer
• Required Security Clearance: Top Secret/SCI with CI Polygraph
• Location: Washington, DC
• Work Type: On-Site
• Shift: First
• Referral Eligibility: Eligible
• U.S. Citizenship Required? Yes

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.
• Review and test software components for adherence to design requirements and document test results.

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).

Health

• 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.

Income Protection

• 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.

Retirement

• 401(k) with immediate vesting: 4% company match plus a 4% non-elective company contribution (8% total).
• 401(k) pre-tax and Roth options.

Leave

• Up to 20 days of flexible paid time off (PTO).
• 11 paid floating holidays.

Work-Life Balance

• Flexible work schedules, including flex time and compressed work periods (contract and project-dependent).