Senior Software Engineer – Backend

ICF

Senior Software Engineer developing and maintaining backend APIs at ICF for CMS programs. Collaborating in Agile teams, working on cloud-based solutions, and ensuring software quality.

Posted 5/6/2026full-timeRemote • Virginia • 🇺🇸 United StatesSenior💰 $98,614 - $167,644 per yearWebsite

Tech Stack

Tools & technologies

Amazon RedshiftApacheAWSCloudDockerETLJavaScriptJestMySQLNode.jsNumpyPandasPostgresPySparkPythonSparkSQLTypeScript

About the role

Key responsibilities & impact

The selected candidate will be required to work on several different APIs and publications of data sets and must be able to develop in an Agile methodology.
Backend API Development and Maintenance
Data Storage and ETL Engineering
Working in an AWS Cloud base environment
Unit Test Writing
Working with a Scrum Team using Agile
Writing documentation in Confluence and using JIRA for User Stories.
Performance Testing
Participate in all team meetings

Requirements

What you’ll need

Bachelor's Degree
5+ years of professional software development experience
Candidate must be able to obtain and maintain a Federal Public Trust
Candidate must reside in the U.S., be authorized to work in the U.S., and all work must be performed in the U.S.
Candidate must have lived in the U.S. for three (3) full years out of the last five (5) years
TypeScript / JavaScript — backend services, async patterns, Node.js runtime
Python 3 — data engineering, ETL pipelines, type hints, abstract base classes
SQL — analytical queries, schema design, query optimization across PostgreSQL and MySQL
NestJS Framework — modules, controllers, services, dependency injection, guards, middleware, decorators
RESTful API design — resource modeling, HTTP semantics, versioning
ETL pipeline design — extract → transform → validate → publish lifecycle; idempotency patterns; runtime business rule validation
S3 — file storage, S3A filesystem integration with Spark, lifecycle conventions
Docker — multi-stage Dockerfiles, docker-compose for local dev clusters, environment parity with production runtimes
ORM proficiency — TypeORM (entity modeling, migrations, query builder, transactions)
Authentication & authorization — JWT/Bearer tokens and policy-based authz with role/claim evaluation
Apache Spark (PySpark) — distributed compute, DataFrame I/O, Spark SQL, EMR Serverless job configuration and submission
Pandas / NumPy — in-process data transformation, vectorized operations, statistical aggregations
Vitest and Jest — unit and integration testing, high coverage discipline (95%+ thresholds)
pytest — Python unit and integration testing; mocking
AWS services
Structured logging — contextual request/job logging
APM tooling — Datadog familiarity a plus
Dependency security — Snyk, CVE remediation, automated dependency updates (Dependabot)
PostgreSQL — schema design, JDBC integration, query optimization
MySQL / Aurora MySQL — schema design, indexing, migrations
Amazon Redshift — analytical SQL, serverless cluster connectivity, credential management
AWS CodeBuild — CI/CD pipeline authoring, multi-step buildspecs, secret injection
EMR Serverless — PySpark job submission, monitoring, custom Python
SSM Parameter Store — runtime secret and config injection
TypeScript linting — ESLint 9, TypeScript ESLint, Prettier, Husky + lint-staged pre-commit hooks
Python linting — Ruff (lint + format), isort, pip-compile for deterministic dependency pinning
Federal Government contracting work experience
Prior experience in consulting or healthcare highly preferred.

Benefits

Comp & perks

Reasonable Accommodations are available, including, but not limited to, for disabled veterans, individuals with disabilities, and individuals with sincerely held religious beliefs, in all phases of the application and employment process.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

TypeScriptJavaScriptPython 3SQLNestJS FrameworkRESTful API designETL pipeline designDockerApache Spark (PySpark)PostgreSQL

Soft Skills

Agile methodologyUnit Test WritingPerformance TestingDocumentation writingTeam collaborationCommunication

Certifications

Bachelor's DegreeFederal Public Trust