Juho A. Heinonen

A software developer with a linguist's background

• Trusted software development professional since 2011 (C#, Python, and JavaScript).
• Security-conscious & proficient in cyber security (CSSLP, OSCP).
• Cloud-native (especially Azure).

I also have a LinkedIn profile.

LinkedIn profile: https://www.linkedin.com/in/juho-a-heinonen-22988a39

Photo

Education

University studies

• MA in University Of Eastern Finland, studies in years 2004-2011.
• Major subject: general linguistics.
• Minor studies: computer science, Russian language and culture, Finnish language and culture, etc.

Other education and certifications

• About 10 Microsoft Azure certifications. E.g. Azure Solutions Architect Expert, Azure DevOps Engineer Expert (they are listed on my LinkedIn page.) 2019-2022.
• Microsoft certification MCSD: App Builder. 2020.
• Microsoft certification MCSA: Web Applications. 2019.
• Cyber Security Base. A data security course (10 ECTS) by F-Secure and Helsinki University in 2019-2020.
• Certified Secure Software Lifecycle Professional (CSSLP). 2021-.
• Offensive Security Certified Professional (OSCP). Studied autumn 2022- July 2023. I have been trying to learn skills related to cyber security. I enjoyed a CTF competition I took part in. CSSLP and OSCP certifications tell of how I have been able to learn that area also.

Work experience

Current position

• May 2021-. Software engineer at Nortal. Working as a full-stack developer in various, mostly industry client projects.
• Mostly React development as a full-stack engineer. C# Asp.Net Core backend running on Azure. Also some Python applications running integration of data between system.

Major previous occupations

• 2018-2021. I worked as a software developer at Innofactor Oyj. Working as a full-stack developer in agile teams.
• Worked one year in a customer's office, being in face to face contact with customer's specialists and product owner.
• One and half year's experience of working in an agile team with people geographically divided, full-time remote work.
• Using C# as the backend language, and TypeScript with Angular and VueJs as frontend.
• 2011-2018. In 2011 I received a summer job in YAP Solutions. The employer was content and they offered me a full-time job as a junior software designer. I worked in various projects often using C# with Asp.Net Web Forms or Asp.Net Mvc. A major part of my work was implementing business logic in a desktop application for unemployment funds of Finland. In 2018 I started looking for change and decided to try Innofactor.
• 2010-2011. I worked as a part time software developer at University Of Eastern Finland. It was a Java library project that dealt with natural language processing.

Some major projects

Here are some big projects I have been working in. Some have also been personally interesting for me.

• Developing stainless steel plant's web applications. I have worked as a part of a team developing and maintaining several applications used to report of the quality of metal coils. React, C#, Asp.Net Core, Azure SQL, and Power BI have been tools used.
• An automatic solution to gather CRM user data and send the user feedback. I implemented (in cooperation with colleagues) a function that runs at night, gathers user data from CRM, and sends another company that data to trigger sending feedback forms. Used technologies: Azure Function, Azure Blobs, Dynamics CRM, SFTP.
• A web portal for citizens' health care. I have taken part as a full stack developer in a team that is developing a web-based health care application. The frontend is implemented in Angular and the backend is Asp.Net Core. The application is deployed in Azure. Many-sided project in which I have learned Angular, TypeScript, Azure cloud, Azure DevOps. My maybe most visible contribution has been implementing displaying customer-related information as pdf.
• Quotation engineers' web application. Again worked as a full stack developer. VueJS was the frontend framework, and Asp.Net Core was the backend, deployed to Azure. In this project I learnt a lot of cooperation with clients and good coding. Code reviews were useful as the team contained some really good developers. Also was my first proper scrum project, teaching me principles of scrum.
• Web forms for several unemployment funds. I developed several membership etc. forms for Finnish unemployment fund. Technologies used were Asp.Net Web Forms and Mvc. Also CA Plex was used, and DB2 database.
• Electronic invoice conversion. A system implemented in BizTalk, using its mapper functionality with help of XSLT language to convert electronic invoices from different formats to another (e.g. Finvoice to TEAPPSXML).
• Unemployment funds' business application. A big desktop application developed in CA Plex rapid application development tool. I was part of a team that worked with unemployment fund specialists and implemented business rules according to their instructions. Business logic side was challenging, and the technology used was also not well known and these projects involved a lot of learning both of business logic and technical details.

Favorite kinds of tasks

• Handling data. Building ETL solutions using e.g. Azure Data Factory and Azure Functions has been nice.
• Optimization. I enjoy finding ineffective parts in applications and especially fixing them.
Using correct data structures and algorithms to get a more effective solution feels nice. It's nice to see concrete results with own eyes and also by using benchmarks.
• Finding and fixing bugs. I think I'm pretty good in noticing small mistakes in applications. Spotting them and/or fixing them feels good.
• Basic full-stack development. Basic React full-stack development has been nice.

Skills, hobbies, personality etc.

Languages

• Finnish. My native tongue.
• English. Quite fluent.
• Swedish. Quite fluent.
• Russian. Can speak well and be understood and understand. With a little practice could be used in business context.
• German. Same but a bit weaker than Russian. Studying with Duolingo.
• French, Italian, Esperanto, Hindi. Some sentences, Hindi letters.

Personality as a professional

• Creative. I'm happy to tell people ideas I get, even if I doubt they could a bit far-fetched. Usually they cause at least some discussion and sometimes they lead to a concrete implementation.
• Conscientious worker. Tries to do one's work properly and keep promises.
• Peaceful. Does not want to fight with colleagues but be in good terms with people.
• Fast learner and eager student. Can learn new things. Learning a new framework or programming language is an interesting challenge. One of my colleagues characterized me once as "oversize stack engineer", referring to the many technologies I was able to work with. Eager to study while working, complete certifications and watch courses to strengthen knowledge of the field. Also interested to discuss with colleagues about software development.
• Good at writing documentation. I have received positive feedback for documenting software components we have been developing.
• Asks questions. When does not understand or know something that is needed does not bang head against wall for too long but has enough humbleness to ask for help.

Hobbies

• Reading. I have the habit of reading a lot, mostly non-fiction. I find history interesting. When I have energy for it, I try to read also books about software development etc.
• Drawing and painting. I started some years to go to an art hobby group. It renewed my childhood/youth hobby. I hope to improve in the skill and bring joy to my close ones with it.
• Body-weight training. I have the habit of doing body-weight exercises at home. My goals include a proper pull up and one hand push up.