Senior Back End Web Developer

Bln24, Llc.; United States; Hybrid; USD 140,000 - 180,000; Full time

Benefits offered by this job

Medical, dental, vision plans

Remote work opportunities

Equal Opportunity Employer

Job summary

BLN24 in McLean, VA is seeking a Senior Back End Web Developer to design, build, and optimize scalable back-end services for CFPB’s RegTech BPA program. The role emphasizes Scala, Akka Toolkit, CQRS, and event-driven architecture within containerized microservices orchestrated by Kubernetes.

You will develop APIs handling complex JSON, query relational and NoSQL stores like PostgreSQL and Cassandra, write unit tests, and collaborate in an Agile team using GitHub.

Qualifications

• 8+ years of professional back-end development experience.
• Experience with Scala, Akka Toolkit, reactive programming, and actor-based concurrency.
• Experience in CQRS, event-driven architecture.
• Experience querying relational and NoSQL databases (PostgreSQL, Cassandra/AWS Keyspaces).
• Expertise with ORM (e.g., Slick) and building APIs with complex JSON payloads.
• Experience writing unit and integration tests; Agile team collaboration.
• Experience containerizing microservices (Docker) and deploying on Kubernetes.
• GitHub for source control and planning; Bachelor’s (Master’s preferred).

Responsibilities

• Design, develop, and maintain back-end services with Scala and Akka Toolkit.
• Build components of a CQRS, event-driven architecture.
• Develop and optimize database queries for PostgreSQL and Cassandra/AWS Keyspaces.
• Implement data access layers using ORM libraries.
• Build and optimize APIs handling complex JSON payloads.
• Write unit and integration tests validating API responses.
• Develop containerized microservices for Docker and deploy on Kubernetes.
• Collaborate in an Agile team with architects, front-end developers, and product owners.

Skills

Scala

Akka Toolkit

Functional programming

Reactive programming

Actor-based concurrency

CQRS

Event-driven architecture

API design

Unit testing

Integration testing

GitHub usage

Agile teamwork

Education

Bachelor’s degree in Computer Science or related field

Master’s degree preferred

Tools

Docker

Kubernetes

Slick ORM

PostgreSQL

Cassandra / AWS Keyspaces

Job description

Job Title: Senior Back End Web Developer

Location: McLean, VA

Company: BLN24

About Us: We find strength in teamwork-a better you is a better us
BLN24 is an award-winning Management Consulting Firm thatsupports the U.S. Federal Government in successfully achieving their mission and goals. Our service and solutions delivery start with understanding each client’s end-state, and then seamlessly integrating within each Agency’s organization to improve and enhance strategic and technical operations and deployments.

Position Overview:
BLN24 is seeking a Senior Back End Web Developer to support CFPB’s RegTech BPA program by designing, building, and optimizing the back-end services behind public-facing regulatory applications. This role requires deep experience with Scala and the Akka Toolkit, CQRS and event-driven architecture, and high-performance API and database development within containerized microservices orchestrated by Kubernetes.

Key Responsibilities:

• Design, develop, and maintain back-end services using Scala and the Akka Toolkit, applying functional programming, reactive programming, and actor-based concurrency
• Build and evolve components of a CQRS, event-driven architecture
• Develop and optimize database queries across relational and non-relational stores, including PostgreSQL and Cassandra / AWS Keyspaces
• Implement data access layers using Slick or comparable ORM libraries
• Build and optimize APIs that handle complex JSON payloads
• Write unit and integration tests that validate end-to-end API responses
• Develop containerized microservices for Docker and deploy them on Kubernetes
• Manage source code, reviews, and planning in GitHub, collaborating with architects, front-end developers, and product owners in an Agile team

Required Qualifications:

• 8+ years of professional back-end development experience
• Experience in functional programming using Scala, including the Akka Toolkit, the reactive programming model, and actor-based concurrency
• Experience working on a CQRS, event-driven architecture
• Demonstrated experience developing and optimizing database queries in relational (SQL) and non-relational (NoSQL) structures, such as PostgreSQL and Cassandra / AWS Keyspaces
• Expertise using Slick or another Object Relational Mapping (ORM) library
• Expertise building and optimizing APIs with complex JSON payloads
• Experience creating unit tests and integration tests that validate end-to-end API responses
• Experience developing containerized microservices, with specific skills developing for Docker containers using Kubernetes orchestration
• Experience working with GitHub for source code management and planning
• Bachelor’s degree in Computer Science or related field; Master’s degree preferred

Preferred Qualifications:

• Experience using asynchronous Python methodologies or similar
• Experience with a front-end framework such as VueJS, especially ReactJS
• Demonstrated experience working on open-source projects, including delivering public-facing solutions
• Prior engagement at CFPB or other federal financial regulators (e.g., FDIC, OCC, SEC, FRB, NCUA)
• Experience delivering solutions in a federal FISMA Moderate or comparable security-compliance environment

What BLN24 brings to the Game:
BLN24 benefits are game changing.We like our team to play hard and that means they need to be taken care of — physically, financially, and emotionally. We make sure to keep them in the game by giving them access to generous medical, dental, and vision plans.

• You can join one of the fastest growing companies headquartered in the Washington DC Metro Area. We give you the opportunity to work in different sectors, so you have the chance at variety while maintaining stability.
• Flexibility at BLN24 allows each individual the opportunity to balance quality work and their personal lives.Depending on projects, we allow remote working opportunities so you can always be in the game no matter where you call home.
  BLN24 is an Equal Opportunity Employer.We believe people are our strength and understand diverse talents are key to our success. We are an equal opportunity employer and place a high value on diversity and inclusion at our company. We do not discriminate on the basis of any protected attribute, including race, religion, color, national origin, gender, sexual orientation, gender identity, gender expression, age, marital or veteran status, pregnancy or disability, or any other basis protected under applicable law. In accordance with applicable law, we make reasonable accommodations for applicants’ and employees’ religious practices and beliefs, as well as any mental health or physical disability needs.