Stef Lewandowski Email and Phone Number
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I’m an experienced early-stage startup tech/product leader with a mix of overlapping skills in software development, design, and business model innovation. I help startups and organisations to find way to apply AI, working on a fractional basis, either hands-on as a lead software engineer, or as a CTO/project lead.My main skill is being able to take the nub of an idea, hone it, test it, rapidly build a working first version and then iterate to take the idea from "zero to one". I do my best work when there is a high degree of unknown about whether something is possible, but when there is also a high level of conviction, patience and freedom provided by stakeholders, sponsors or investors.During my career I have been the technical founder of a handful of startups, and led venture-building and "labs" initiatives to explore business opportunities in a diverse set of industries: sustainability, finance, supply chain, logistics, e-commerce, education, urban mobility, car sharing, data analytics, tech recruitment, culture and more.Prior to my current fractional work, I led Platform at On Deck, where I helped the company scale its technology and data systems through a period of hypergrowth from Seed to Series B, where we grew from a team of 30 to 350 in a year.During COVID I helped build an award-winning learning platform for students to learn from home during lockdown. The service grew from a one-week prototype to enabling 4.5 million students per month by the peak of the pandemic. We produced almost a full national curriculum of video content and resources (~10,000 video lessons) across most subjects/years and made it all available for free. It has since become an arms-length government body.I sit on the industrial advisory board of Birmingham University Computer Science and I have a history of volunteering for tech-focused and social good organisations. I'm a Clore Fellow and am always interested in the intersection of modern technology and culture. I've been a school governor at two schools and was chair for three years, where I learnt a lot about good governance. Currently, if you were to ask me my most used tech stack, I’d say Typescript, NextJS, React, tRPC/GraphQL, Node, Serverless functions (AWS Lambda / Google Cloud Functions / Azure Functions), Cloudflare (Workers / KV), GCP for data science, Snowflake for data warehousing, and a preference for Postgres as an application database. In my spare time, I experiment with LLMs.You can find my writing at https://stef.io and I am @stef on Twitter/Instagram.
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Fractional Cto And Startup Advisor And MentorVarious StartupsLondon, Gb
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Fractional Cto / Startup Advisor / MentorVarious Startups Jan 2020 - PresentWorking fractionally as a lead software engineer and/or consultant CTO primarily in Applied AI. Projects have included consulting with an AI/VR healthtech spinout from Cleveland Clinic (a large US hospital) and building an AI lesson planning assistant aiming to support teachers to more easily and quickly design high-quality lessons, alongside advisory and mentoring for pre-seed- and seed-stage AI/data startups on technology.
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Principal Software EngineerTranslucent Oct 2022 - Oct 2023London, GbA platform to solve the data and workflow problems faced by CFOs of multi-entity businesses.If your company is made up of several legal entities, say one in the UK, one in the EU and one in Australia, reasoning about your finances can become complex and require some Excel-wrangling.Translucent takes a data warehouse-first approach, ingests your data from multiple accounting software vendors and transforms it into a single, clean schema. On top of that, it offers a suite of web applications that allow you to work with your unified data to help you reason about your business at the group level.I built the first prototype, led on the overall architecture and grew the early engineering team, helping the company to secure significant seed investment and launch to market. -
Director Of Product, PlatformOn Deck Apr 2021 - Oct 2022San Francisco, California, UsOn Deck is a curated community headquartered in San Francisco designed to increase early stage founders' odds of building a successful venture-backed company.I led the Platform team which encompasses Data, No-Code, Business Infrastructure and Funnel during a period of explosive growth. I joined the team at seed stage when the company had a team of 30. The role developed rapidly as the company expanded to 350, reaching Series B and a $650m valuation during my tenure. -
Head Of EngineeringOak National Academy May 2020 - Apr 2021National, GbOak is a non-profit COVID response project to support UK teachers in continuing to educate their students while schools are closed or students are isolating at home. During the pandemic year we served over 120 million lessons to UK children, and supported ~4.5 million children per month.In response to the first UK lockdown, a group of teachers and tech folk got together to build a platform for hosting lessons that schools could use to share with their classes. 5 days after I joined, we launched a website with our first week of lesson videos. On day one we served 250,000 users and had zero downtime.I provided technical leadership (think VP Engineering) on our tiny development team (CTO running product/stakeholders, 1x UX/design/front-end dev, 2x web developer, 1x data engineer). I led the development of our Classroom, Teacher Hub, Privacy, Content QA and WWW web apps using React / Next.js / Firebase / Cloudflare Workers / GraphQL. We built out a production process/ingest/transcode/delivery system over the Summer of 2020 to provide an almost complete UK curriculum across all year groups in nearly all subjects, ~10,000 lessons made by 500 teachers. All of this is available via a searchable UI for teachers to be able to pick and choose how they use the content we're providing.It’s been an exhilarating project to work on, and using Serverless approaches and “the JAM stack” has meant our tiny tech and product team has been able to ship almost daily releases throughout.We're very soon releasing a major feature - all UK mobile operators will be "zero-rating" traffic to our service, which means kids will be able to access the service on a mobile phone without being charged for data. I led this work from the tech side, which is a major architectural change – every single browser request has to go via our domain - no third party calls. -
Venture Builder / Tech LeadIng Oct 2018 - Jun 2020Amsterdam, North Holland, NlConsulting in ING's London Lab on new ventures at the intersection of finance, tech, and sustainability. By 2040 the world collectively needs to have invested $68T to keep us below 2 degrees of warming. Our team worked on how to build scalable ways to meet that ambition using a lean experiment-driven approach: first, research and discover significant customer pain points, then validate those problems are worth solving, test out multiple potential solutions before committing to building software or digital products. Within the next decade, trillions of investment will flow into sustainable investments to reach carbon neutrality goals that government and business are setting. To enable that to happen, we'll need to find new ways of gathering data about what is, and isn't a sustainable investment. As the primary focus of my work in the lab during my time with ING I co-led an initiative from idea through to MVP and initial piloting, called "Overlay". Our team developed an early version of what a sustainability data management layer could look like to help financial institutions meet carbon neutrality objectives through greater efficiency, accuracy and automation.Developed a software architecture that worked within the constraints of a regulated environment whilst also bringing in modern cloud-based approaches using Azure and serverless / low code design patterns. Tech stack – React.js / Apollo / GraphQL / Serverless functions / Node.js / Azure. I also designed the brand, identity, slide deck assets, website. -
Founder / CptoMakelight Mar 2016 - Nov 2018London, London, GbA passion project that turned into a bootstrapped e-learning business led by my wife, Emily Quinton – an online learning community for makers and creative small business owners, including video courses, data analytics tools and community features via a monthly subscription. The user base grew to over 100,000 while I was contributing.As the sole software developer and designer, I helped build out Makelight in a lean way from a humble one-page blog post through to a subscription e-learning business built on our own tech stack. There was a lot to build too: landing pages, funnel and acquisition analytics, adaptive remarketing based on on-site activity, course content management system, payments, subscriptions, our own partially automated email newsletter system, notifications, personalised activity feeds, course activity tracking and retention flows, member administration system, an Instagram analytics tool (later became Year of Colour), and lots of third party API integrations to external tools. I learnt a lot! Tech stack: Ruby on Rails, Javascript (React, Vue, D3), Google Cloud Platform, Heroku, Postgres, AWS, SQS, Postgres, Redis, Memcache. -
Venture Builder – Dhl Supply ChainRainmaking Venture Studio Oct 2017 - Sep 2018London, England, GbDeveloping new digital ventures around e-commerce logistics and supply chain with backing from DHL. Leading on the technology side of the venture building process, but with a lot of input into strategy, business model and deal structure. Developed a web-based lean experiment knowledge base app that we used to run our business model validation work. Built a web-based technical documentation product that helped us communicate tech decisions to stakeholders from the investing business. Then for the actual user-facing product / software development, focused on a build using a serverless architecture made up of small universal web apps using a Graphcool, Node, GraphQL, Apollo, React, Next.js / Gatsby.js stack. -
Entrepreneur In Residence - Jaguar Land Rover Inmotion Venture StudioRainmaking Venture Studio Apr 2015 - Mar 2016London, England, GbI'm fascinated with the process of developing prototypes into fully-fledged products and businesses. Particularly where you can draw on a unique understanding of a particular technology or industry. At Makeshift I learned a ton about what does and doesn't work, and at Rainmaking I helped build and run a venture studio to kickstart Jaguar Land Rover's InMotion newco. I hired and brought together three teams to investigate three areas of opportunity. Working in a lean way we discovered and validated business models by building digital prototypes. We explored new financial and transport models, built out an insurance product, and tested a variety of propositions before the successful products graduated the studio. Feedback from the teams was that this was a huge period of learning for them, and it was for me too.
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Founder And CtoMakeshift Jan 2013 - Jan 2015London, GbA startup studio dedicated to giving a leg up to the little guy.The model was to build a series of small digital prototypes based on our own ideas, test them out rapidly by releasing and getting feedback early, then investing in the ideas that show the most promise.From about forty or fifty code sketches in the first year, we worked on a cohort of twelve prototypes in twelve months, with three of those progressing with a team, revenue and growth in year two.As the technical founder / CTO I wrote a lot of the early code on these products, and our preferred stack involved Ruby on Rails, Heroku, AWS and PostgreSQL, although around that time ReactJS appeared and is where I first started using it. -
Consultant TechnologistVarious Startups Apr 2012 - Mar 2013Developed a mobile skate/BMX video app with funding from Red Bull, incubated by Sidekick Studios. Ran a three month project with Comic Relief around rapidly testing ideas that had been developed internally as one-week digital prototypes. Created a new way of running digitally-enabled events, culminating in a one-day strategy event for all ~1000 staff of Accenture's Dublin office using real-time visualisation of conversation data that won a Business to Arts innovation award.
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Technical FounderAframe Apr 2009 - Apr 2012London, GbCollaborative video platform for professional TV, video and film-makers to make it easier to collaborate via the internet. I co-developed the patent that formed the basis for the company's technology and grew it from a team of two with a prototype to a team of 36 and a scalable software platform, raising $10m of venture funding through Pre-seed, Seed and Series A.I led an agile team of talented developers to build a set of products and services, including our own web-based digital asset management platform, distributed transcode and ingest system, team collaboration tools, rapid metadata annotation apps, desktop application, Avid and Final Cut integration, and lots more.Tech stack - Ruby on Rails, Javascript, C++. -
Co-Founder - Creative Director, Later Ceo3Form May 2001 - Mar 2009A Webby-award-winning digital design and software agency. We got our big break when we were commissioned to design and build Vivienne Westwood's site using our proprietary PHP CMS.Worked with large brands like Mars, Sprite, Kitekat on web development and viral games. Built cutting-edge online experiences for cultural sector clients including the V&A Museum, Birmingham Museums and Art Gallery and First Light Movies. Along the way, picked up a clutch of business and creative awards and sold the business to Made Media.
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Creative DirectorWebxpress Jun 1999 - May 2001I was responsible for all creative output of this boutique web development agency. Built websites for large multi-national clients using Flash and HTML, developed our own content management system using PHP and MySQL, and experimented with viral micro-games.
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Freelance DesignerSelf-Employed Jul 1995 - Jun 1999I sold my first web project to a client before I'd gone to University, so while I was there I topped up my income by freelancing. It was a fun time - animations, video graphics, websites, micro games… I learnt a lot about working with clients and building things that people wanted. During that time Antonio Gould and I met and we gathered with a few others under the umbrella name of "3form", the three "forms" being Technology, Music and Design. Balancing up running club nights, web projects and studying was a challenge, particularly because around that time I was seriously ill. You can watch one of my videos to see me talk about the spur that time gave me to do what I do now.
Stef Lewandowski Skills
Stef Lewandowski Education Details
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University Of BirminghamComputer Science / Software Engineering -
Clore Leadership ProgrammeCultural And Creative Leadership
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Oaklands CollegeInternational Baccalaureate
Frequently Asked Questions about Stef Lewandowski
What company does Stef Lewandowski work for?
Stef Lewandowski works for Various Startups
What is Stef Lewandowski's role at the current company?
Stef Lewandowski's current role is Fractional CTO and Startup advisor and mentor.
What is Stef Lewandowski's email address?
Stef Lewandowski's email address is st****@****stef.io
What is Stef Lewandowski's direct phone number?
Stef Lewandowski's direct phone number is +4478876*****
What schools did Stef Lewandowski attend?
Stef Lewandowski attended University Of Birmingham, Clore Leadership Programme, Oaklands College.
What are some of Stef Lewandowski's interests?
Stef Lewandowski has interest in New Technology, Mobile, Creative Industries, Digital Media, But I Dj Occasionally, Snowboarding, Health Care, Art, Music, Consumer Internet.
What skills is Stef Lewandowski known for?
Stef Lewandowski has skills like Start Ups, Entrepreneurship, Web Development, Agile Methodologies, Web Applications, Digital Strategy, Digital Media, Video, Mobile Applications, Strategy, Public Speaking, Social Media.
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