I'm Tanmoy. I help founders build the right thing, then make it work.
For about seven years I've built and led technology at a cybersecurity SaaS company, starting as a systems developer and becoming its CTO. Now I do the same work for founders and small businesses.
The story so far
Starting as a developer
I joined Bob's Business, a cybersecurity awareness SaaS company, as a systems developer in August 2019, after a computer science degree at Newcastle University. Six months later I was the technical lead.
Being close to the code early on taught me where software gets expensive: not in the first version, but in everything that has to be patched, hosted and explained afterwards.
Becoming the CTO
In January 2022 I became CTO. The title says technology, but the job went much further. I recruited and managed people, owned budgets and the P&L, shaped financial strategy, fed into marketing, ran operations, and reported to the board and investors.
On the technology side, I rebuilt the platform from a legacy licensed system on VPS hosting into our own cloud-native SaaS on AWS, running in Docker. Infrastructure costs fell by 96%, with zero downtime and 100% SLA adherence over three years. I designed a new product architecture from scratch, led R&D into new product ideas, owned the new website end to end, and led the technical side of pitches to VC and PE investors.
We held ISO 27001:2022 with zero nonconformances across three audit cycles, and grew to more than 200 enterprise and public sector clients. That is the lesson I bring to every founder: bigger customers buy trust, and trust is built long before the sales call.
Why I went fractional
In November 2024 I moved from full-time CTO to fractional CTO there, and started DreamSolve. I'd seen what a small company can do with the right technology leadership, and I wanted to help more founders get there, faster.
There are three doors in: you have an idea, you have built something, or you need senior tech leadership. The work is different at each one. The aim is the same: a product people pay for.
The timeline, drawn to scale
Drag across the drawing, or focus it and use the arrow keys, to step through each change.
Now
DreamSolve, FounderCrush and fractional CTO work
Fractional CTO, founder of DreamSolve, and co-founder and CTO of FounderCrush, an agentic AI co-founder in pilot with 100+ users.
What I believe
Build the right thing first.
I would rather spend a week finding out who pays, and for what, than three months building a guess. Code is the easy part now. Knowing what to build isn't.
Technology should be honest.
That means telling you when you don't need a rewrite, when off-the-shelf will do, and when something isn't ready to launch. It also means answering a security questionnaire truthfully, not optimistically.
AI needs sensible guardrails.
AI tools are a good way to move fast and test an idea. When AI acts on someone's behalf, it needs their consent, the least access that does the job, an audit trail, and a person approving anything that touches money or personal data.
Alongside DreamSolve
I'm co-founder and CTO of FounderCrush, an agentic AI co-founder for entrepreneurs. It helps with company formation, compliance, banking, insurance and operational setup. It runs on Mastra AI with tool-calling agents and RAG pipelines, earns through referrals to service providers rather than subscriptions, and is in pilot with more than 100 users. Here is how FounderCrush keeps its agents in check.
I'm also a strategic advisor to an early-stage fashion rental marketplace, and from 2024 to 2025 I advised an AI risk assessment platform on cybersecurity.
Credentials
Tanmoy Hossain is a Sheffield and London based fractional CTO, bridging the gap between big ideas and real products for founders and small businesses.
- Education
- BSc Computer Science, Newcastle University, 2016 to 2019
- Programme
- Help to Grow: Management, 2023
- Certification held
- ISO 27001:2022, zero nonconformances across three audit cycles
- Platform
- 96% lower infrastructure cost, zero downtime and 100% SLA adherence over three years
- Customers
- 200+ enterprise and public sector clients
- Commercial
- 80% margin on bespoke projects, payback under two years on every technology project delivered
- Teams
- Built and led teams of 6+ across engineering, product, creative and QA
- Company
- DreamSolve Technologies Ltd, company number 15595345
Want to see if I can help?
Book the intro call. It's 30 minutes and free: we work out whether I can help, and which door you're at.