Sr Back End Developer

Job Title: Sr Back End Developer

Employment Type: Full-Time, Long-Term Role

Location: Remote from LATAM

Time Zone: The client operates in the CT time zone.

Industry: Artificial Intelligence.

Kopius is an innovative IT company at the forefront of software development. We are seeking a Sr Back End Developer based in LATAM to join our team! The project is within IA-Based Marketing industry and is based in Chicago, IL. It provides artificial Intelligence-enhanced customer engagement that drives results across the retail, healthcare, telecommunications, and financial industries.

Role Responsibilities:

• Translate product requirements into deterministic + LLM-augmented dialog flows (Python, LangGraph, Rasa-style YAML).
• Own the full lifecycle of new workflows: design, implementation, automated test coverage, observability, and performance tuning.
• Integrate third-party REST / GraphQL / gRPC APIs to fetch data in-call (EHRs, CRMs, payment gateways, etc.).
• Write clean, maintainable Python (asyncio, FastAPI, pytest) with CI/CD pipelines and >90 % test coverage.
• Partner with ML engineers to prototype and productionize LLM calls, retrieval-augmented generation (RAG/CAG), and prompt-engineering best practices.
• Keep an eye on latency, cost, and privacy by instrumenting metrics and hardening edge cases.
• Pitch in on adjacent platform work when needed—small team, big impact.

Basic Qualifications:

• Intermediate/Advanced English skills with strong communication abilities.
• Self-motivated, quick learner, and adaptable to new technologies and legacy systems.
• Thrives in a team environment, actively contributes to collaboration, fostering a sense of community.
• Excellent problem-solving and analytical skills, with a keen eye for detail and a proactive approach to issue resolution. Embraces new ideas to enhance problem-solving processes.

Qualifications:

• 4+ years building Python services in production and working with AWS.
• Proven API integration chops (RESTful, GraphQL, auth, pagination, retries, etc)
• Solid grasp of data structures (graph knowledge especially), algorithms, and object-oriented design
• Experience writing robust automated tests and shipping CI/CD
• Familiarity with with event-driven architectures and containerization (Kafka, Docker, K8s on EKS)
• Comfortable working in a fast-paced startup environment

Nice to have:

• Hands-on experience with LLM frameworks (LangChain, LangGraph, semantic-kernel, etc)
• Machine-learning basics (prompt-tuning, LLM deployment, fine-tuning)
• Vector databases (pgvector, Pinecone)
• Experience with Java and Typescript (our RESTful APIs and application code run on Java Spring + React).

Perks & Benefits working at Kopius!

• Remote Work & Flexible Hours: Enjoy the freedom to work remotely and at times that suit you best.
• Continuing Education: Access ongoing training, workshops, and company-sponsored courses to keep your skills sharp.
• Career Growth: Discover abundant opportunities for advancement as you cultivate your skills and expertise.
• Language Learning: Take advantage of online English classes to enhance your communication skills.
• Referral Bonuses: Earn rewards for referring talented individuals to our team through our Referral program!
• Keep Moving: Embrace an active lifestyle with our support! Enjoy reimbursement for your physical activity memberships every month.