Senior Backend Engineer - (NPW)

Company Overview

Milestone Technologies is a global IT managed services firm that partners with organizations to scale their technology, infrastructure and services to drive specific business outcomes such as digital transformation, innovation, and operational agility. Milestone is focused on building an employee-first, performance-based culture and for over 25 years, we have a demonstrated history of supporting category-defining enterprise clients that are growing ahead of the market. The company specializes in providing solutions across Application Services and Consulting, Digital Product Engineering, Digital Workplace Services, Private Cloud Services, AI/Automation, and ServiceNow. Milestone culture is built to provide a collaborative, inclusive environment that supports employees and empowers them to reach their full potential.

Our seasoned professionals deliver services based on Milestone’s best practices and service delivery framework. By leveraging our vast knowledge base to execute initiatives, we deliver both short-term and long-term value to our clients and apply continuous service improvement to deliver transformational benefits to IT. With Intelligent Automation, Milestone helps businesses further accelerate their IT transformation. The result is a sharper focus on business objectives and a dramatic improvement in employee productivity. Through our key technology partnerships and our people-first approach, Milestone continues to deliver industry-leading innovation to our clients. With more than 3,000 employees serving over 200 companies worldwide, we are following our mission of revolutionizing the way IT is deployed.

Job Overview

Role summary

Owns API and service-layer development for product features, including integration with orchestrator services; owns the Central Orchestrator refactor and extraction — decoupling from dependent services, independent deployability, and horizontally scalable design; owns the HITL Review Framework and AI Security and Trust Layer, covering prompt injection protection, data leakage prevention, content filtering, and policy enforcement; and owns the client's risk-and-lessons-learned system API contract, source grounding and citation pipelines, and advancement of that workflow to launch position.

Key responsibilities

Develop and maintain APIs and service-layer integration for product features

Integrate product services with the platform orchestrator

Build artifact generation and export endpoints for the Governance Content and Artifact Suite

Refactor and extract the Central Orchestrator as an independent module

Decouple the orchestrator from dependent services and ensure independent deployability

Design for horizontal scalability

Make agent routing logic testable in isolation

Build the Human-in-the-Loop (HITL) Review Framework

Implement prompt-injection protection and data-leakage prevention controls

Implement content-filtering and policy-enforcement controls

Build and maintain the client's risk-and-lessons-learned system API contract

Build source-grounding and citation pipelines

Advance the client's risk and lessons-learned workflow to launch position

Required skills & experience

5+ years Python API development experience

Experience integrating services with a central orchestrator or comparable routing layer

Experience building document / artifact generation and export endpoints

Solid REST API design skills

Senior-level Python engineer with strong system design skills

Hands-on FastAPI and LangGraph experience

Proven experience decoupling monolithic orchestration logic into modular, independently deployable services

5+ years backend engineering experience with a security / trust-and-safety focus

Experience with content-filtering or policy-enforcement engines

Familiarity with human-in-the-loop review workflow design and prompt-injection defenses

Strong Python skills

3+ years data engineering experience with API integration and pipeline design

Experience with source-grounding / citation pipeline design

Experience with risk-management or lessons-learned enterprise workflow data a plus

Preferred qualifications

Experience with document templating/export libraries

Familiarity with FastAPI

Experience extracting a monolithic orchestrator into a standalone, horizontally scalable service under live delivery pressure

Experience with isolated/unit-testable routing-logic design

Experience securing an LLM-facing application specifically against prompt injection

Familiarity with client-style security sign-off processes

Direct experience inheriting and advancing a partially-built pipeline to production launch position

Citation/source-attribution pipeline experience

Education

B.Tech/BCA/MCA in Computer Science or a related field, or equivalent practical experience.

Compensation

Estimated Pay Range

Exact compensation and offers of employment are dependent on circumstances of each case and will be determined based on job-related knowledge, skills, experience, licenses or certifications, and location.

Our Commitment to Diversity & Inclusion

At Milestone we strive to create a workplace that reflects the communities we serve and work with, where we all feel empowered to bring our full, authentic selves to work. We know creating a diverse and inclusive culture that champions equity and belonging is not only the right thing to do for our employees but is also critical to our continued success.

Milestone Technologies provides equal employment opportunity for all applicants and employees. All qualified applicants will receive consideration for employment and will not be discriminated against on the basis of race, color, religion, gender, gender identity, marital status, age, disability, veteran status, sexual orientation, national origin, or any other category protected by applicable federal and state law, or local ordinance. Milestone also makes reasonable accommodations for disabled applicants and employees.

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