Anastasia Tulentseva
Senior Software Engineer & Tech Lead
Profile
Senior Software Engineer and Tech Lead with over 13 years of experience architecting scalable web platforms and complex API integrations. I apply a pragmatic approach to system design, focusing on maintainable, right-sized solutions. I am a strong technical communicator who excels at aligning business requirements with technical execution.
I am now seeking an opportunity to build impactful products, ideally leveraging my deep roots in Ruby on Rails alongside modern frontend architectures.
Experience
Founding Engineer & Tech Lead
Apr 2025 – PresentSystem Architecture & Engineering
- Web Platform Development: Architected and built the central back-office portal from scratch using Next.js, React, and TypeScript, providing a unified interface for data analytics and client operations.
- API Integration: Designed Next.js API routes to integrate exclusively with the central backend API, securely powering the data analytics and operations dashboard.
- Cross-Platform Alignment: Enforced product consistency across the ecosystem, ensuring feature parity, shared UI/UX design patterns, and unified terminology between the web portal and the iOS mobile app.
- Testing & Reliability: Established comprehensive, automated testing pipelines across the web platform utilising Vitest and Playwright to ensure high confidence during rapid iteration cycles.
Infrastructure & Mobile Delivery
- Cross-Platform Mobile Scope: Expanded technical ownership to lead the architecture and App Store deployment of the iOS app (SwiftUI, ARKit/RealityKit, LiDAR). Utilised AI-assisted workflows for rapid prototyping while delegating complex native features to specialised iOS developers.
- Cloud & Telemetry: Managed AWS cloud infrastructure, securing $10k in startup credits to minimize operational costs. Utilised Firebase Crashlytics for mobile telemetry tracking and production debugging.
Senior Product Engineer
Jul 2023 – Dec 2024- Performance Optimisation: Engineered data-intensive reporting pages and dashboards. Optimised Rails API retrieval times by deeply restructuring database queries and eliminating N+1 bottlenecks.
- Frontend Architecture & Dashboards: Refactored legacy Active Admin pages and developed brand-new React/MUI dashboards for customer administrators to improve data management workflows.
- Revenue-Critical Features: Implemented a new licensing tier and administrative dashboard, safely modifying core billing logic to ensure high reliability for money-related platform code.
- System Reliability: Participated in on-call rotation schedules, rapidly debugging and deploying fixes for production issues to maintain high system availability.
Senior Software Engineer
Nov 2019 – Dec 2022- Enterprise Integrations: Led backend development for the company's inaugural API integration with Zurich Insurance. Architected data flows and liaised with partner engineers to launch two product lines on schedule with zero significant production bugs.
- Project Leadership: Managed the backend workload and coordinated with internal Frontend teams and external QA to ensure strict adherence to partner requirements and rigorous deployment cycles.
- Complex Business Logic: Safely navigated and extended the highly complex electricity pricing engine to incorporate new smart meter tariffs, ensuring strict mathematical accuracy for supplier comparisons without breaking legacy calculations.
- Feature Engineering: Designed and implemented a click-tracking and virtual budgeting system to accurately manage, decrement, and represent paid partner placement balances.
Software Engineer & Team Lead
May 2017 – Sep 2019- Greenfield Development: Fast-tracked from Junior Backend Developer to Lead for a new project. Built end-to-end features spanning React.js frontend, Node.js services, and Rails APIs.
- Technical Standards: Established core coding practices and architectural guidelines for the newly formed Node/React team, ensuring maintainability and scalability.
- Media Processing Pipelines: Maintained and deployed high-load video manipulation services across a 50-server cluster. Enhanced an existing Ruby and FFmpeg service to dynamically burn user-drawn graphical overlays into downloadable video layers.
- Backend Optimisation: Optimised the core API to handle advanced, high-throughput client requests. Collaborated closely with Database and DevOps teams to fine-tune query performance and ensure system reliability under heavy loads.
- Team Building: Actively participated in technical interviews, evaluating candidates for culture fit and technical proficiency to build a strong engineering unit.
Education
Master's Degree
Citizenship
Skills
Software Engineering
Core: Ruby on
Rails, Next.js, React.js, Node.js, Vue.js, TypeScript, JavaScript,
Tailwind CSS.
Architecture: RESTful
APIs, System Design, Microservices, Performance Tuning, Performance
Profiling, Data Modelling.
Infrastructure & Tools
Databases: PostgreSQL,
MySQL, SQL, Elasticsearch, OpenSearch.
Cloud & Testing: AWS, Azure, Docker, FFmpeg, Firebase, Playwright, Vitest, CI/CD
Strategy.
Leadership & Delivery
Technical Leadership & Mentorship, Cross-Functional Collaboration, Enterprise Integrations, SDLC Optimisation, AI-Assisted Engineering, Rapid Prototyping, Technical Hiring.