Senior/Tech Lead FullStak Developer

About AltimiAltimi is a technology acceleration partner with impressive experience spanning over 20 years, specializing in the successful delivery of software development projects for international customers. We are based in Poland. Our main area of operation is the DACH region and Scandinavia, where we are known for providing top-notch software development services.Our primary focus are managed services for companies seeking to accelerate growth, solve complex tech problems, build MVP/POC and/or modify legacy infrastructures.The main area of competence include Product & Application Engineering, DevOps, Cloud Security & Managed Services and AI & Data Enablement. Role OverviewWe are building a SaaS platform focused on time tracking and GPS‑based workforce and fleet management. The product combines software with hardware integrations and serves companies operating in the field, relying on real‑time data and high system reliability.We are looking for a Tech Lead Full‑Stack Developer who will take ownership of the technical direction of the platform, make key architectural decisions, and work closely with the founder to support long‑term growth.ResponsibilitiesTechnical ownership of the SaaS platform (backend, frontend, architecture)Designing, developing, and scaling systems that process real‑time dataDefining and executing long‑term technical and architectural strategyHands‑on development combined with code reviews and best‑practice enforcementMentoring and supporting other engineersClose collaboration with the founder and business stakeholdersIntegrations with external systems and GPS hardware (SOAP / REST)Ensuring high standards of reliability, security, performance, and scalabilityRequirementsSenior‑level experience as a Full‑Stack Developer or Tech LeadStrong expertise in .NET and backend architectureExperience designing and scaling SaaS platformsAbility to make technical decisions with long‑term product and business impact in mindHigh level of ownership, independence, and responsibilityStrong communication skills and fluent EnglishProduct‑oriented, pragmatic engineering mindsetTech StackBackend & APIsC#, .NET (Framework 4.8, .NET Core, .NET 6)MS SQL (Azure), Entity FrameworkMongoDB (Atlas), RedisREST / SOAP APIs, IdentityServer, FirebaseFrontend & MobileAngularJS, Vue.js 2 (Quasar), TypeScriptMobile apps built with Cordova (transitioning to React Native)Infrastructure & DevOpsAzure Cloud (Web Apps, Storage)Azure DevOps, GitApple & Android app deploymentDomain & IntegrationsGPS device integrations (e.g. Teltonika, Digital Matter)IoT / telematics systemsReal‑time data processingWhats in it for you?Join for a role, stay for the development: More than 40% of our team is working with us longer than 5 years. Explore diverse domains, projects and modern technologies through internal mobility.Learn from the best: Almost 60% of all our colleague has over 10 years of professional experience.Flexibility: Work fully remotely, full-time from our office in Wroclaw or in a hybrid model.Practical benefits: private medical care, life insurance, sport card, English and German classes in small, online groups.