Lead Architect - Cross-Platform Flutter (Windows, Android, iOS)

Ready to design the system, not just write features? Join Synmatch AI's client as the Lead Architect Cross-Platform Flutter on the founding engineering team building the next generation of power-quality analysis software for a global premium provider of measurement instruments. You'll own the architectural decisions that determine whether this product feels fast, trustworthy, and maintainable five years from now.

The product runs where the work happens. Engineers and analysts open multi-gigabyte measurement files on a Windows tablet in a substation, on an Android phone next to a transformer, or on an iPad in a fully automated production site. The app is local-first, fully offline-capable, and syncs to the cloud platform when a connection is available. As Lead Architect, you decide how that promise is kept from the rendering pipeline down to the storage layout.

This is a hands-on architect role, not a slide-deck role. You'll write Flutter and Dart code, author ADRs, lead spikes, mentor four to five specialists, and partner with an in-house power-quality analyst and product owner to translate physics into software that holds up to professional scrutiny. You build it, you run it: the architecture you set is the architecture you keep on call for, observe in production, and evolve under real customer load.

What you will do as Lead Architect...

• Define System Shape: Establish architecture, module boundaries, and dependency rules that let your five-person Flutter team ship complex product without stepping on each other

• Own Local-First Foundation: Choose and integrate on-device storage for time-series workloads hitting gigabytes per file

• Drive Flutter Performance: Lead work keeping the app responsive on lower-end Surface tablets—frame budgets, Impeller behavior, isolate boundaries, MethodChannel cost

• Author ADRs: Record decisions, trade-offs, and known constraints in writing so the team can evolve the system safely

• Design Cloud Sync Handshake: Collaboratively specify API contract, auth flow (OAuth2/OIDC), and conflict-resolution model with cloud platform peers

• Mentor Without Bottlenecking: Pair with mid-level engineers, review key PRs, and remove blockers so specialists stay in their lanes

• Run Targeted Spikes: Lead time-boxed investigations at decision forks and bring back defensible recommendations

• Production Ownership: Share on-call rotation, lead incident reviews for architectural issues, and feed learnings back into next ADR

What we are looking for…

• Production Architecture: 8+ years building commercial software, with 3+ years architecting Flutter applications targeting Windows and mobile (Android, iOS) from single codebase

• Deep Dart Fluency: Comfortable with null safety, isolates, FFI, async/streams, and generic programming at scale

• Layered Architecture: Hands-on with Clean Architecture or hexagonal patterns, feature-modular monorepos (Melos or similar), dependency injection (get_it, Riverpod), and large-codebase state management

• Local-First Data Architecture: Real experience with embedded engines—SQLite/drift, DuckDB via FFI, Isar, or Realm with clear perspective on when each is appropriate

• Performance Discipline: Hands-on with Flutter DevTools, Skia/Impeller pipeline, frame budgets, and profiling on real low-end Windows and Android tablets

• API & Integration Design: REST/JSON or gRPC, plus OAuth2/OIDC for cloud handshakes

• Writing as Deliverable: ADRs and design notes treated as primary artifacts, not afterthoughts

• Test-Driven Development: Default practice for design-sensitive code, modeled for the team

• Operational Ownership: Belief that the architect should be on call for their architecture—lived on a previous team

• Quiet Leadership: Earns trust through transparent reasoning; comfortable saying "we don't know enough- here's the spike I propose"

Desirable (but not required):

• Prior experience leading production Flutter application including desktop or tablet targets

• Background in industrial, scientific, or medical environments

• Familiarity with C4 modelling, threat modelling, and supply-chain hygiene practices

• MSc in Computer Science or engineering discipline

• Exposure to power, energy, or measurement-instrumentation software

Benefits and perks…

• Founding Influence: Set technical direction for a product defining a category for the next decade

• Specialist Team: Work alongside dedicated power-quality analyst, data-processing engineer, visualization engineer, and hardware product teams

• Real Engineering Culture: ADRs, performance budgets, and reference test vectors are first-class artifacts

• Made-in-Germany Quality: Decades of measurement-instrument heritage with a customer base that notices when the numbers are right