Muhammad Jafar

A fullstack engineer at axess Intelligence in Cologne, shipping AI product features and type-safe APIs on a production B2B intelligence platform — Next.js, TypeScript, PostgreSQL. Based in Nordrhein-Westfalen, originally from Islamabad.

Brief

Three years on the same Next.js platform, from frontend components down to query plans on Postgres and MySQL. The work has been at axess Intelligence in Cologne: first as an intern embedded with the CTO on a competitive-analysis dashboard, then as a working student, now full-time, owning API design, deployment, database performance, and the LLM product surfaces the platform now leads with.

The work spans the full stack because the problems do. Bringing an API route from 600ms to 180ms is not a frontend job or a backend job; it is one continuous question. The interesting part is sitting with that question long enough to answer it precisely.

Selected Work

Current

Fullstack Engineer

axess Intelligence GmbHCologne, Germany

Owning the platform's surface area — API design, query plans, the deployment pipeline, and the AI features the product now leads with. Recent work has centered on shipping LLM surfaces (an in-app chat assistant, chat-to-report, evaluation) on the Vercel AI SDK and a type-safe tRPC backend, alongside the migration to App Router, Drizzle, and Neon Postgres that the rest of the team builds on.

Shipped

In-product AI chat assistant in production: multi-provider LLM (Claude, OpenAI, Gemini) on the Vercel AI SDK, a streaming UI, and a type-safe tRPC backend.
Chat-to-report — editable reports generated from chat with per-block AI regeneration and live streaming across text, chart, and table blocks; built on the v1 RAG pipeline and confidence-scored feature extraction.
LLM observability and evaluation on Braintrust: request tracing, a custom scorer wired into CI, and online/offline judge parity for answer quality.
Pages-to-App-Router migration with 90+ raw-SQL endpoints refactored into parameterized Drizzle queries on tRPC — end-to-end type safety, ~50% less debugging time.
MySQL to PostgreSQL on Neon serverless, with indexes and CTEs on the hottest queries: up to 60% faster reads.
Enterprise onboarding via Azure Entra SSO with per-organization enforcement — JWT, RBAC, and invitation and password-reset flows on better-auth.
Test suite (unit, integration, E2E) with Stryker mutation testing and an A SonarQube reliability rating: ~40% fewer post-deployment bugs.

Working Student, Software Development

axess Intelligence GmbHCologne, Germany

Shipping features end-to-end across the production CRM stack alongside a distributed team. The role was a steady progression from feature delivery into platform-level work: query tuning on Postgres and MySQL, API layer refactors, and the kind of code-review discipline that prevents bugs before they ship.

Shipped

Production features across the CRM in TypeScript, Next.js, and Node.
Query tuning on Postgres and MySQL: 30–40% faster data retrieval on dashboards.
Codebase refactor with modular utilities and typed API abstractions: 25% faster feature delivery.
Automated Vercel pipelines for staging and production environments.
35% fewer post-merge issues through disciplined code review and up-front architecture.

Intern, Software Development

axess Intelligence GmbHCologne, Germany

Embedded with the CTO on the Competitive Analysis Dashboard. The first time owning a sustained piece of frontend architecture, and the first time learning how pull-request review and Git branching actually work in a team that ships.

Shipped

Modular React and TypeScript components that cut later development time by 30%.
Frontend architecture refactor aligned with team conventions.
Pull-request review and Git branching workflow, the kind that becomes invisible once it works.

Fullstack Developer

Sunskill TechsIslamabad, Pakistan

Led the migration of a legacy PHP application to a modern React and Node stack. Designed the REST surface that connected the new frontend to existing services, implemented JWT auth and role-based access control from scratch, and set up the GitHub Actions and Vercel pipeline that delivered the result.

Shipped

Legacy PHP to React + Node migration: 45% faster page loads.
REST API design connecting the new frontend to existing services.
JWT authentication and role-based access control, built from scratch.
GitHub Actions and Vercel CI/CD for continuous delivery.

Stack

The tools in active rotation. Most have been carried into production work; the rest are kept sharp on the side.

01Frontend

React, Next.js, TypeScript, JavaScript, Tailwind CSS, Radix UI, shadcn/ui, TanStack Query, TanStack Form, Framer Motion, Tiptap, ApexCharts, Flutter.

02AI / LLM

Vercel AI SDK, Anthropic Claude, OpenAI, Google Gemini, Braintrust, RAG pipelines.

03Backend

Node.js, tRPC, Server Actions, REST APIs, GraphQL, better-auth, Python, FastAPI, NestJS.

04Data

PostgreSQL, MySQL, Drizzle ORM, Neon, Logical Replication, Redis, SQLite, SQL.

05Infrastructure

Vercel, GitHub Actions, CI/CD, Docker, AWS S3, Google Cloud, Resend, Mixpanel, Git.

06Testing & Quality

Vitest, Playwright, Stryker, Testing Library, axe-core, type-coverage.

07Workflow

pnpm, Agile / Scrum, Jira, Figma, Code Review, Dagster.

Currently sharpeningLLM evaluation · Postgres internals · Server Components

Credentials

M.Sc. International Software Systems Science
Otto-Friedrich-Universität BambergBamberg, Germany
Thesis: “Online k-anonymity on intermodal mobility data,” grade 2.0 (Gut). Coursework and thesis completed; degree not awarded.
2022 – 2025
B.Sc. Computer Science
COMSATS University IslamabadIslamabad, Pakistan
Sep 2017 – 2021

Signals

Where the dossier intersects the present. Updated each deploy.

Currently: axess Intelligence GmbH, Cologne
Based: Gelsenkirchen, Nordrhein-Westfalen
Focus: LLM evaluation · Postgres performance · type-safe APIs
Languages: English (C1) · German (A2, improving) · Urdu (native)
Last revised: June 22, 2026

Contact

Open to fullstack roles in product teams that ship and care about craft. On-site in NRW or remote across the EU. A short, specific email is the best way in.

jafar.mjc@gmail.com@MuhammadJafar-sudo/in/muhammadjafar01

Replies usually within a day, on weekdays.