ABOUT
Ahmad has spent 4+ years building scalable backend systems and cross-platform applications across fintech, real estate, health-tech, and AI — reducing outages by 80%, scaling platforms to thousands of users, and shipping full-stack products end to end.
He works from Berlin and writes about the engineering behind the work.
He cares most about the parts that are easy to skip: uptime, traceability, and the decisions that keep a system honest under load.
AVAILABLE FOR SENIOR ROLESBerlin, Germany
SKILLS
The stack, grouped
Languages
PythonJavaScriptTypeScriptGoDart
Backend
DjangoFastAPINode.jsExpressHonoServerpodSocket.iogRPCWebSocketsRESTGraphQLCelery
Frontend
FlutterReactReact NativeNext.jsAstroTailwindThree.jsReact Three FiberBLoCRiverpodRedux
Cloud & DevOps
AWSGCPDockerKubernetesTerraformCI/CDServerless
AI/ML
OpenAIGoogle GeminiAnthropic ClaudeVertex AIBedrockpgvectorVeoTesseract OCRLLM orchestrationSemantic searchEmbeddings
Data & Storage
PostgreSQLPostGISpgvectorMySQLRedisFirestoreDynamoDBSQLiteDuckDBS3GCSCloudflare R2
Payments
StripePaystackFlutterwaveEscrowSubscription billingIdempotent webhooksHMAC verification
Auth & Security
OAuth2JWTFirebase AuthCognitoRBACTOTP MFADevice bindingRate limitingEncryption at restNDPR/GDPR
Tools
GitGitHub ActionsPrometheusOpenTelemetryGrafanak6JestVitestPlaywrightpytestDockerUnix
SELECTED WORK
Scale and impact, at a glance
EXPERIENCE
Where the work happened
2026–Present · Abuja, Nigeria
Software Engineer
SafePass
- Built a safety-focused navigation and incident-intelligence platform — live human-monitored road-trip tracking, emergency response, panic-triggered silent audio recording, and crowdsourced route-safety markers.
- Shipped an event-driven Flutter app with Firebase Auth, background GPS tracking, offline queueing, and panic-button audio recorded in 30s self-contained chunks with retry-until-confirmed upload.
- Designed a Hono + TypeScript backend (23 route modules) on PostgreSQL for durable data, DynamoDB for ephemeral live GPS state, Redis for rate limiting, and native WebSockets for live tracking and emergency events.
- Provisioned Terraform IaC (VPC, ECS Fargate, RDS Multi-AZ, S3 Object Lock, CloudFront) with GitHub Actions OIDC and hardened security — TLS 1.3, AES-256/KMS, chain-of-custody evidence, and a dedicated panic-alert path with SMS fallback.
2025–2026 · Lagos, Nigeria
Software Engineer
De-Duke Garden Care
- Led a real-estate marketplace connecting guests with verified hosts for commercial and shortlet listings, monetized via two-sided commission.
- Architected geospatial near-me search with PostGIS and semantic search with pgvector embeddings, backed by cursor pagination, read replicas, and Redis caching with circuit-breaker fallback.
- Engineered payment correctness across the full flow — Paystack checkout, 15-min booking holds, idempotency keys, signature-verified webhooks, and admin-only escrow release with failed-transfer reversals.
- Authored a k6 load-testing suite targeting 50,000 concurrent users and a 5M-listing catalog with a hard zero-double-booking / zero-duplicate-charge gate.
2024–2025 · Ibadan, Nigeria
Mobile App Engineer
Pinnaview Networks
- Developed the cross-platform mobile application from the ground up across Android and iOS with Flutter, BLoC, and Dio.
- Built a virtual account funding system that automated wallet payments and meaningfully increased transaction volumes.
- Implemented in-app and push notifications for instant transaction visibility, plus core features for bulk data purchases, cashback rewards, and referrals.
- Optimized app performance by refining API communication and caching with Hive, the repository pattern, and secure storage.
2023–2024 · Lagos, Nigeria
Backend Engineer
Popat Limited
- Restored and stabilized critical production and staging environments, finding the root causes of system failures and cutting outages by 80%.
- Optimized backend service configuration across messaging and task-processing systems with Celery, Redis, and SSL/Certbot.
- Wrote comprehensive API documentation with Swagger/OpenAPI that standardized service communication and reduced integration errors.
- Built a calendar system for event tracking and an email dispatch system with custom templates.
2021–2023 · Washington DC, USA
Software Engineer
Lifecoel LLC
- Built travel update modules for a travel risk management application and optimized booking and medical-test scheduling flows.
- Scaled a career-development SaaS to 1,000+ users across the full development lifecycle with Django, React, AWS, and PostgreSQL.
- Developed and deployed a cross-platform mobile suite serving 5,000+ daily users, cutting load times through profiling and state management.
- Automated workflows with CI/CD pipelines, reducing deployment times by 50% and lifting stability and speed by 40%.
CONTACT
No friction between impressed and contacted
AVAILABLE FOR SENIOR ROLES