Senior Python Developer
- Job Type Full Time
- Qualification BA/BSc/HND
- Experience 6 years
- Location Lagos
- Job Field ICT / Computer 
Job Summary
- We are building advanced AI systems that understand, generate, and debug Python code at a senior engineer level.
- We need a Senior Python Developer to help us build the infrastructure, pipelines, and evaluation frameworks that power our models.
Responsibilities
- Design and maintain data pipelines for large-scale code datasets (cleaning, deduplication, filtering, and augmentation.
- Build evaluation harness to benchmark model performance on real-world Python tasks (LeetCode-style, open-source repos, internal tests suites).
- Develop internal tooling (FastAPI, CLI tools, background workers) to streamline model experimentation and deployment.
- Optimize inference performance – caching, batching, async I/O, and memory profiling.
- Integrate with LLM APIs and open-source models (vLLM, TGI, Transformers) to build reuseable Python abstractions.
- Write robust tests, type-annotated code, and comprehensive documentation.
- Collaborate with ML engineers to translate research prototypes into scalable, maintainable Python services.
Requirements
- 6+ years of professional Python experience (3.11+), with deep knowledge of the standard library, asyncio, typing, and packaging.
- Strong experience with FastAPI, Pydantic, SQLAlchemy, and Celery or similar task queues.
- Proven track record building data-intensive applications – handling millions of records, working with Parquet/JSONL, and using tools like Dask, Ray, or Polars.
- Experience with cloud infrastructure (AWS/GCP/Azure) -S3, RDS, Lambda, ECS, or similar.
- Familiarity with ML/Ops practices -model versioning, experiment tracking (MLflow/Weights & Biases), and CI/CD for data pipelines.
- Strong debugging and performance-tuning skills (cProfile, memory_profilier, etc.).
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Method of Application
Job Summary
- We are seeking an experience senior python Developer to architect, build, and maintain high-performance backend systems and APIs.
- In this role, you will lead technical design decisions, write clean and scalable production code, and mentor junior engineers while collaborating with cross-functional teams to deliver robust software solutions.
Responsibilities
- Review, annotate and evaluate AI-generated SQL responses for correctness, clarity, query logic, joins, syntax, performance, security, and readability.
- Create detailed prompts and reference solutions to guide AI learning on complex data challenges.
- Assess solutions for accuracy, adherence to prompts, and identify errors in methodology, query structure, indexing strategy, or conceptual understanding.
- Deliver clear, constructive feedback and detailed technical explanations to support continuous model improvement.
- Run and validate proof-of-work code, fact check data-related claims, and rate/compared AI responses based on reasoning quality.
- Build automated SQL audit queries that can scan the annotated dataset daily to flag duplicates, conflicting labels, null values, or out of distribution samples before they reach the ML Team.
- Partner with ML Engineers to test proposed annotation guidelines against actual database records.
Requirements
- 7+ years of professional experience working with SQL in production with SQL in production environments as a Database Engineer, SQL Developer, Data Engineer, or similar role.
- Bachelors’ degree or higher in computer science, information systems, Engineering, mathematics, or a related technical field
- Expert-level proficiency in SQL, including complex joins, windows functions, aggregation strategies, query plan analysis, and performance tuning.
- Hands-on experience designing relational data models, schemas, and data warehouse structures (star and snowflake schemas).
- Exceptional written and spoken English (c1 level or higher) with the ability to write clear technical explanations,
- A methodical, systematic approach to evaluating reasoning quality and identifying subtle data or query issues.
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