Tech Lead

Role Summary 
We’re looking for a Full-Stack Tech Lead to lead delivery across web, mobile, and backend 
for a fast-moving tech startup. You’ll be hands-on across the stack while guiding architecture, 
setting engineering standards, and mentoring developers. You’ll also work closely with Product 
Owners and Project Managers to shape scope, plan releases, and ensure predictable 
delivery. 
This role suits someone who can move between React/Next.js (web), React Native (mobile), 
and .NET Core (backend), while making strong architectural decisions around DDD, modular 
monolith design, microservices tradeoffs, databases, and system design. 

Key Responsibilities 

Technical Leadership & Architecture 
● Own the end-to-end technical direction across web, mobile, and backend. 
● Drive pragmatic decisions around modular monolith vs microservices (boundaries, 
integration patterns, consistency tradeoffs). 
● Apply DDD to create clear domain boundaries (bounded contexts, aggregates, domain 
events). 
● Set standards for code quality, testing, API contracts, and documentation across the 
team. 

Delivery & Collaboration with Product 
● Partner closely with Product Owners and Project Managers to: 
○ clarify requirements, define acceptance criteria, and reduce ambiguity 
○ break epics into deliverable slices and estimate work realistically 
○ plan sprints/releases and manage dependencies and risks 
○ balance product speed with technical sustainability (tech debt, refactors, platform 
work) 
● Provide engineering input into prioritisation, timelines, and tradeoffs. 

Team Leadership & Mentorship 
● Lead and mentor engineers through pairing, design reviews, code reviews, and 
coaching. 
● Build a strong engineering culture around ownership, quality, and continuous 
improvement. 
● Support hiring and onboarding as the team grows. 
Front-End (Web + Mobile) 
● Lead development of high-quality experiences on web (React/Next.js) and mobile 
(React Native). 
● Guide choices around state management, performance, component architecture, and 
cross-platform consistency. 
● Ensure UI quality: responsive design, accessibility (web), and mobile UX polish 
(navigation, device differences). 
Backend & Data 
● Own backend design and implementation in .NET Core, including API design and 
security basics. 
● Drive database design and performance (schema design, migrations, indexing, query 
optimisation). 
● Implement resilient patterns: retries/timeouts, idempotency, background processing, and 
observability foundations. 

Required Qualifications 
● Strong full-stack experience shipping production products across frontend + backend 
(mobile experience required). 
● Prior experience as a senior engineer/lead with clear ownership of delivery and 
mentorship. 
● Strong system design skills and ability to communicate tradeoffs clearly. 
● Demonstrated architectural competence in: 
○ DDD (practical application) 
○ Modular monolith design (clear boundaries, dependency discipline) 
○ Microservices understanding (when/how to split, data ownership, failure modes) 
● Solid database fundamentals (relational DB design, migrations, performance tuning). 
● Strong collaboration skills with Product Owners and Project Managers. 

Key Technologies 
● Web: React / Next.js, AgnularJS, Vue.js, Svelte, Zustand, Tanstack Query, Cypress, 
Playwright. 
● Mobile: React Native, Expo, iOS, Android 
● Backend: .NET Core, REST, DDD, CQRS, RabbitMQ, NATS,  
● Data: Relational databases (e.g., PostgreSQL / SQL Server)