London · Remote & Hybrid
London · Remote & Hybrid
Building production systems with
Fast Prototypes — Bold Leaps
Senior product software engineer working end-to-end: technical discovery, business analysis, architecture, implementation and production delivery — owned by one person.
A tight architecture review setting the milestones; structured sprints turning them into a production-grade MVP, demoable every week.
Leading a senior engineering org inside Upwork — AI product delivery, architecture standards, hiring bar and outcome-driven roadmaps across LLM, RAG and agentic surfaces shipped to a marketplace at scale.
Owned end-to-end product engineering for GoFractal's AI Super-Dialler — an outbound voice-automation platform pairing LLM agents with predictive dialling to qualify leads at roughly 10× human throughput.
Led product and architecture for Avorealtor — a real-estate SaaS in Marbella serving a prestigious brokerage with a portfolio of 80,000+ properties. Built a white-label website framework, property-management app and Cross-CRM import system deduplicating and unifying listings across Resales Online, Inmobalia, Inmovilla and Expo Costa del Sol through deep-learning matching.
R&D engagement for a digital trading platform — translating a strategic brief into a concrete, executable AI + automation roadmap. Scoped use cases, validated data pipelines, designed the LLM / agent layer and produced architecture documentation the in-house team could ship against.
Swiss-Army Product Engineer
Four engagement formats, scoped to your stage — and where you are heading next.
From business workflow to live cloud architecture — diagrammed, costed, deployed.
Prototype to production — MVPs running on weekly demos and impactful milestones.
Senior engineering leadership on retainer — roadmap, hiring, architecture, delivery cadence.
Turning raw product ideas into accessible, SEO-first products with staying power.
Since 2015, I have been delivering software solutions across regulated industries, applying full-stack product expertise to compress complex organisational processes into one product the team is already using. The approach was forming a delivery rhythm — state-of-the-art tooling, weekly demos, post-engagement support — that is now staying ahead of a fast-evolving tech landscape.
Scalable & Modular by Design / Production-Grade AI & ML Integration / Secure-by-Default Systems / Microservices & API-First Development / Performance Tuning & Refactoring / Cross-Platform from Day One / Cloud-Native & DevOps Automation
Verified Upwork Reviews
“Vlad has been super helpful and very knowledgeable in his work. His ideas are clearly thought through and supported by a realistic execution plan.”
“Vlad was great to work with — really helpful in identifying our strategic move forwards with AI.”
“Vlad was very well fitted in the team, precise and brief… strongly recommended.”
“Vladislav is absolutely one of the best freelancers that I had to deal with — extraordinary professional on each phase of the project.”
“End-to-end product thinking with the engineering muscle to back it up — from architecture review to a shippable MVP, with weekly demos and honest trade-offs.”
Hands-On Senior Engineer
Honest credentials — no inflated titles.
FORMACIÓN PROFESIONAL JORGE GUILLEN · 2012 – 2016
Spanish post-secondary vocational qualification (EQF level 5) in Computer Science.
LE WAGON · 2021
Intensive full-stack programme — Ruby on Rails, JavaScript, product engineering. Skill-enhancement programme on top of years of production experience.
IRONHACK BARCELONA · 2020
Full-stack programme — JavaScript, React, Node, TypeScript, Supabase. Skill-enhancement programme.
UPWORK · GOFRACTAL · AVOREALTOR
Currently Head of Software Engineering at Upwork. Previously CTO at GoFractal (AI super-dialler), Product Owner at Avorealtor, and full-stack engineer at Inmotech and Cluttons. Long-running freelance Product Software Engineer across UK / US / EU clients.
Engagement & Pricing
Base rate £50/hr · custom packages on request · NDAs welcome — hello@mvpdeveloper.uk
1-week sprint · idea → blueprint
After one week, you receive an architecture blueprint, data model, clickable prototype, prioritised build backlog and a 60-minute walkthrough with your engineers.
4 – 12 week engagement · blueprint → shipped
After 4 – 12 weeks, you receive a deployed MVP, weekly demo builds, documented architecture decisions, handoff notes and a codebase ready for the next engineer.
Business & organisational AI · RAG · OpenAI · Claude
After engagement, your team receives an internal AI agent connected to documents and core systems. It drafts outputs, writes records back and ships with evals, guardrails and handoff docs.
Workflow audit & wiring
£35/hr
Scoped agent build
From £3,500
MOST REQUESTED
During the retainer, you receive CTO-level execution: roadmap, hiring input, code-review rules, sprint cadence, vendor calls and investor technical support under one accountable engineer.
Monthly retainer from £4,000
FOR STUDIOS
Each month, your studio receives 40 senior engineering hours under your brand. Delivery can be client-facing or white-label, with your invoice and your deliverables.
Monthly retainer · 40 hrs/month from £2,400
30 minutes — free · the first step into any of the above
After the call, you receive a written scope recommendation, fixed quote, proposed start date or clear no-fit answer with a referral when relevant.
No charge
hello@mvpdeveloper.uk
www.linkedin.com/in/hromlyak
Send a few lines about where you are — stage, stack, deadline — and I will come back within 24 hours with an assessment and a recommended next step.
You work with one senior engineer — not a sales rep, a project manager and three juniors. Architecture, code, AI integration and stakeholder calls all sit with the same person. Decisions are faster, scope drifts less, and the final codebase is consistent.
A free 30-minute discovery call to align on goals, constraints and timeline. If it is a fit, we run a 1-week paid Architecture Review with concrete documentation, then decide together whether to continue with an MVP build, fractional CTO retainer, or hand the doc to your existing team.
Frontend: TypeScript, Next.js, React, Apollo, Zustand. Backend: Node/NestJS, GraphQL, REST, Python/FastAPI. Data: PostgreSQL, MongoDB, Redis, ETL pipelines. AI: OpenAI, Vertex AI, Keras, RAG and custom agents. DevOps: Docker, Kubernetes, Helm, GitHub Actions. Pragmatic choices, no hype-driven detours.
Base hourly rate is £50/hr. Architecture Reviews start at £700 (1 week, 20 hrs). MVP builds start at £4,000 (4 weeks, part-time). Fractional CTO retainers start at £4,000/month. Custom scopes welcome.
Remote-first by default — clients across the UK, US and EU. Hybrid on-site possible in London and selectively in the EU for short-haul on-site sprints. Time zone: UTC+0 / UTC+1.
Yes — that is a common pattern. I integrate with your sprint cadence, code-review standards and tooling (Jira, Confluence, GitHub). I can also raise the bar where it is needed (CI/CD, code review, ADRs, observability).
All client work is delivered work-for-hire — IP transfers to the client on completion. NDAs are welcome and routinely signed before architecture reviews or sensitive discussions.
Open to contract right now (>30 hrs/week). Discovery calls usually happen within 48 hours of an enquiry; an Architecture Review can typically start within 1 – 2 weeks.
