Software Engineer · Systems & Products

I help startups turn ambitious product ideas into reliable software systems that support growth.

Across fintech, edtech, AI, and platform infrastructure, I've helped teams build products, remove technical bottlenecks, and create systems that hold up in production.

TW
Tobi Williams
tobiwilliams.tech
www.linkedin.com/in/tobi-williams
github.com/TobiWilliams001
Perspective

Software rarely fails because of code alone.

Products fail because teams solve the wrong problem, optimise the wrong constraint, or build systems that can't support growth.

My approach starts with understanding the outcome first:

  • What problem are we solving?
  • Who does it matter to?
  • What would success actually look like?

Only then does technology become useful.

Whether I'm working on a startup product, an AI workflow, or platform infrastructure, the goal is the same: build systems that create real business value and remain reliable as complexity grows.

SELECTED WORK

A selection of products, platforms, and systems I've helped build.

01
Africa Students Network · Platform
A platform serving 5,000+ students across 15 African countries
As the platform grew, the existing website and manual processes became a bottleneck. Students needed a better experience, while the team needed to support growth without increasing operational complexity. I helped transform the platform into an offline-first product with secure access, automation, and dashboards — reducing student data costs by 40% and cutting administrative workload by 50%.
Next.jsTypeScriptFirebaseReact QueryPWACase Study →
↗
02
Startup & Product Engineering
Product development across SaaS, AI systems, and client platforms
Across startup products, internal tools, and client platforms, I've worked on systems where speed matters but reliability cannot be sacrificed. The challenge is rarely writing code — it's helping teams move from idea to working product while balancing changing requirements, limited resources, and business priorities. My role has included shipping SaaS features, automation systems, AI-powered workflows, and customer-facing products designed to create measurable outcomes while remaining maintainable long-term.
Next.jsTypeScriptDockerAWS/AzureCase Study →
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03
Systems · Applied AI
Argus — private search that never leaves your machine
Most AI tools require users to hand their data to external providers. Argus started as an exploration of a different question: can modern search and retrieval remain useful while keeping sensitive information completely local? I designed and built a local-first platform combining vector search, encryption, and real-time retrieval — delivering sub-10ms queries with zero cloud dependencies and full ownership of data.
GoPythonFAISSAES-256RAGCase Study →
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04
Enterprise · Security Architecture
Securing enterprise data across multi-tenant boundaries
Secure systems are ultimately trust systems. This work focused on helping a growing platform strengthen tenant isolation, improve authorization controls, and reduce the risk of sensitive data exposure across production infrastructure. I audited and hardened 30+ API endpoints and improved role-based access controls — resulting in a more resilient architecture that supported growth while maintaining zero security incidents.
FastAPIPostgreSQLDockerGCPRBACCase Study →
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WRITING 5

Notes on engineering, security, systems, decision-making, and the realities of building products.

Note · Product & Engineering
The Most Expensive Bug I See
Isn't In The Codebase.
Most startups don't lose months because engineers are slow — they lose months because they're solving the wrong problem. The cost of misunderstanding compounds far faster than technical debt ever will.
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ProductJun 2026
Startups Don't Buy Code
When founders say they need a developer, they rarely mean they need code — they mean they need progress. The most effective engineers learn that the outcome is the product.
Read →
SystemsApr 2026
The Difference Between Building Features And Building Systems
Features solve immediate problems, systems solve recurring ones. Leverage comes from designing architectures that continue producing value long after the original problem appears.
Read →
Building For Low-Bandwidth Environments →Security Is A Trust Problem →
Research

RESEARCH

Understanding systems beyond software.

Alongside engineering, I study markets, economics, decision-making, and quantitative research.

The same habits that produce good engineering often produce good research:

Curiosity.
Rigour.
Evidence.
A willingness to be wrong.

My interest is not prediction. It's understanding how systems behave under constraints and why outcomes emerge the way they do.

Layer 01
Market Structure
How incentives, participants, and constraints shape outcomes.
Layer 02
Evidence
Academic research, historical data, and empirical analysis.
Layer 03
Quantitative Models
Building tools, frameworks, and infrastructure to test ideas.
Layer 04
Decision Systems
Applying disciplined thinking under uncertainty.
About
Available for new projects

I'm Tobi Williams.

I'm a software engineer who enjoys solving difficult product and operational problems.

Over the last few years I've worked across fintech, edtech, AI systems, platform infrastructure, and startup products—helping teams build software that delivers value today while remaining reliable as complexity grows.

What interests me most isn't technology itself. It's understanding how systems behave under pressure, identifying the real constraint, and designing solutions that improve outcomes for both users and businesses.

That's the level I prefer to operate from.

CurrentlySoftware Engineer · Startup / Agency
Contributing toAfrica Students Network
ResearchQuantitative market research & systems
Primary stackNext.js · TypeScript · Go · Python
BasedLagos, Nigeria · Remote

The most interesting opportunities usually begin with a conversation.

If you're building something ambitious, solving a difficult problem, or looking for someone who enjoys thinking through complex systems, I'd be happy to hear from you.

Let's build something worth building.

hello@tobiwilliams.tech →
Something worth
building together?
Get in touch →hello@tobiwilliams.tech